parser: add << and >> operators
[nit.git] / src / parser / lexer.nit
index 257b305..3c0f81c 100644 (file)
@@ -3,9 +3,10 @@
 package lexer
 
 intrude import parser_nodes
+private import tables
 
 redef class Token
-    readable writable var _text: String
+    readable var _text: String
 
     fun parser_index: Int is abstract
 
@@ -150,9 +151,9 @@ redef class TKwmeth
        return 10
     end
 
-    init init_tk(text: String, loc: Location)
+    init init_tk(loc: Location)
     do
-        _text = text
+        _text = once "fun"
                _location = loc
     end
 end
@@ -170,23 +171,10 @@ redef class TKwtype
     end
 end
 
-redef class TKwattr
-    redef fun parser_index: Int
-    do
-       return 12
-    end
-
-    init init_tk(loc: Location)
-    do
-        _text = once "attr"
-               _location = loc
-    end
-end
-
 redef class TKwinit
     redef fun parser_index: Int
     do
-       return 13
+       return 12
     end
 
     init init_tk(loc: Location)
@@ -199,7 +187,7 @@ end
 redef class TKwredef
     redef fun parser_index: Int
     do
-       return 14
+       return 13
     end
 
     init init_tk(loc: Location)
@@ -212,7 +200,7 @@ end
 redef class TKwis
     redef fun parser_index: Int
     do
-       return 15
+       return 14
     end
 
     init init_tk(loc: Location)
@@ -225,7 +213,7 @@ end
 redef class TKwdo
     redef fun parser_index: Int
     do
-       return 16
+       return 15
     end
 
     init init_tk(loc: Location)
@@ -238,7 +226,7 @@ end
 redef class TKwreadable
     redef fun parser_index: Int
     do
-       return 17
+       return 16
     end
 
     init init_tk(loc: Location)
@@ -251,7 +239,7 @@ end
 redef class TKwwritable
     redef fun parser_index: Int
     do
-       return 18
+       return 17
     end
 
     init init_tk(loc: Location)
@@ -264,7 +252,7 @@ end
 redef class TKwvar
     redef fun parser_index: Int
     do
-       return 19
+       return 18
     end
 
     init init_tk(loc: Location)
@@ -277,7 +265,7 @@ end
 redef class TKwintern
     redef fun parser_index: Int
     do
-       return 20
+       return 19
     end
 
     init init_tk(loc: Location)
@@ -290,7 +278,7 @@ end
 redef class TKwextern
     redef fun parser_index: Int
     do
-       return 21
+       return 20
     end
 
     init init_tk(loc: Location)
@@ -303,7 +291,7 @@ end
 redef class TKwprotected
     redef fun parser_index: Int
     do
-       return 22
+       return 21
     end
 
     init init_tk(loc: Location)
@@ -316,7 +304,7 @@ end
 redef class TKwprivate
     redef fun parser_index: Int
     do
-       return 23
+       return 22
     end
 
     init init_tk(loc: Location)
@@ -329,7 +317,7 @@ end
 redef class TKwintrude
     redef fun parser_index: Int
     do
-       return 24
+       return 23
     end
 
     init init_tk(loc: Location)
@@ -342,7 +330,7 @@ end
 redef class TKwif
     redef fun parser_index: Int
     do
-       return 25
+       return 24
     end
 
     init init_tk(loc: Location)
@@ -355,7 +343,7 @@ end
 redef class TKwthen
     redef fun parser_index: Int
     do
-       return 26
+       return 25
     end
 
     init init_tk(loc: Location)
@@ -368,7 +356,7 @@ end
 redef class TKwelse
     redef fun parser_index: Int
     do
-       return 27
+       return 26
     end
 
     init init_tk(loc: Location)
@@ -381,7 +369,7 @@ end
 redef class TKwwhile
     redef fun parser_index: Int
     do
-       return 28
+       return 27
     end
 
     init init_tk(loc: Location)
@@ -391,6 +379,19 @@ redef class TKwwhile
     end
 end
 
+redef class TKwloop
+    redef fun parser_index: Int
+    do
+       return 28
+    end
+
+    init init_tk(loc: Location)
+    do
+        _text = once "loop"
+               _location = loc
+    end
+end
+
 redef class TKwfor
     redef fun parser_index: Int
     do
@@ -638,23 +639,10 @@ redef class TKwas
     end
 end
 
-redef class TKwwith
-    redef fun parser_index: Int
-    do
-       return 48
-    end
-
-    init init_tk(loc: Location)
-    do
-        _text = once "with"
-               _location = loc
-    end
-end
-
 redef class TKwnullable
     redef fun parser_index: Int
     do
-       return 49
+       return 48
     end
 
     init init_tk(loc: Location)
@@ -667,7 +655,7 @@ end
 redef class TKwisset
     redef fun parser_index: Int
     do
-       return 50
+       return 49
     end
 
     init init_tk(loc: Location)
@@ -680,7 +668,7 @@ end
 redef class TKwlabel
     redef fun parser_index: Int
     do
-       return 51
+       return 50
     end
 
     init init_tk(loc: Location)
@@ -693,7 +681,7 @@ end
 redef class TOpar
     redef fun parser_index: Int
     do
-       return 52
+       return 51
     end
 
     init init_tk(loc: Location)
@@ -706,7 +694,7 @@ end
 redef class TCpar
     redef fun parser_index: Int
     do
-       return 53
+       return 52
     end
 
     init init_tk(loc: Location)
@@ -719,7 +707,7 @@ end
 redef class TObra
     redef fun parser_index: Int
     do
-       return 54
+       return 53
     end
 
     init init_tk(loc: Location)
@@ -732,7 +720,7 @@ end
 redef class TCbra
     redef fun parser_index: Int
     do
-       return 55
+       return 54
     end
 
     init init_tk(loc: Location)
@@ -745,7 +733,7 @@ end
 redef class TComma
     redef fun parser_index: Int
     do
-       return 56
+       return 55
     end
 
     init init_tk(loc: Location)
@@ -758,7 +746,7 @@ end
 redef class TColumn
     redef fun parser_index: Int
     do
-       return 57
+       return 56
     end
 
     init init_tk(loc: Location)
@@ -771,7 +759,7 @@ end
 redef class TQuad
     redef fun parser_index: Int
     do
-       return 58
+       return 57
     end
 
     init init_tk(loc: Location)
@@ -784,7 +772,7 @@ end
 redef class TAssign
     redef fun parser_index: Int
     do
-       return 59
+       return 58
     end
 
     init init_tk(loc: Location)
@@ -797,7 +785,7 @@ end
 redef class TPluseq
     redef fun parser_index: Int
     do
-       return 60
+       return 59
     end
 
     init init_tk(loc: Location)
@@ -810,7 +798,7 @@ end
 redef class TMinuseq
     redef fun parser_index: Int
     do
-       return 61
+       return 60
     end
 
     init init_tk(loc: Location)
@@ -823,7 +811,7 @@ end
 redef class TDotdotdot
     redef fun parser_index: Int
     do
-       return 62
+       return 61
     end
 
     init init_tk(loc: Location)
@@ -836,7 +824,7 @@ end
 redef class TDotdot
     redef fun parser_index: Int
     do
-       return 63
+       return 62
     end
 
     init init_tk(loc: Location)
@@ -849,7 +837,7 @@ end
 redef class TDot
     redef fun parser_index: Int
     do
-       return 64
+       return 63
     end
 
     init init_tk(loc: Location)
@@ -862,7 +850,7 @@ end
 redef class TPlus
     redef fun parser_index: Int
     do
-       return 65
+       return 64
     end
 
     init init_tk(loc: Location)
@@ -875,7 +863,7 @@ end
 redef class TMinus
     redef fun parser_index: Int
     do
-       return 66
+       return 65
     end
 
     init init_tk(loc: Location)
@@ -888,7 +876,7 @@ end
 redef class TStar
     redef fun parser_index: Int
     do
-       return 67
+       return 66
     end
 
     init init_tk(loc: Location)
@@ -901,7 +889,7 @@ end
 redef class TSlash
     redef fun parser_index: Int
     do
-       return 68
+       return 67
     end
 
     init init_tk(loc: Location)
@@ -914,7 +902,7 @@ end
 redef class TPercent
     redef fun parser_index: Int
     do
-       return 69
+       return 68
     end
 
     init init_tk(loc: Location)
@@ -927,7 +915,7 @@ end
 redef class TEq
     redef fun parser_index: Int
     do
-       return 70
+       return 69
     end
 
     init init_tk(loc: Location)
@@ -940,7 +928,7 @@ end
 redef class TNe
     redef fun parser_index: Int
     do
-       return 71
+       return 70
     end
 
     init init_tk(loc: Location)
@@ -953,7 +941,7 @@ end
 redef class TLt
     redef fun parser_index: Int
     do
-       return 72
+       return 71
     end
 
     init init_tk(loc: Location)
@@ -966,7 +954,7 @@ end
 redef class TLe
     redef fun parser_index: Int
     do
-       return 73
+       return 72
     end
 
     init init_tk(loc: Location)
@@ -976,6 +964,19 @@ redef class TLe
     end
 end
 
+redef class TLl
+    redef fun parser_index: Int
+    do
+       return 73
+    end
+
+    init init_tk(loc: Location)
+    do
+        _text = once "<<"
+               _location = loc
+    end
+end
+
 redef class TGt
     redef fun parser_index: Int
     do
@@ -1002,7 +1003,7 @@ redef class TGe
     end
 end
 
-redef class TStarship
+redef class TGg
     redef fun parser_index: Int
     do
        return 76
@@ -1010,15 +1011,41 @@ redef class TStarship
 
     init init_tk(loc: Location)
     do
+        _text = once ">>"
+               _location = loc
+    end
+end
+
+redef class TStarship
+    redef fun parser_index: Int
+    do
+       return 77
+    end
+
+    init init_tk(loc: Location)
+    do
         _text = once "<=>"
                _location = loc
     end
 end
 
+redef class TBang
+    redef fun parser_index: Int
+    do
+       return 78
+    end
+
+    init init_tk(loc: Location)
+    do
+        _text = once "!"
+               _location = loc
+    end
+end
+
 redef class TClassid
     redef fun parser_index: Int
     do
-       return 77
+       return 79
     end
 
     init init_tk(text: String, loc: Location)
@@ -1031,7 +1058,7 @@ end
 redef class TId
     redef fun parser_index: Int
     do
-       return 78
+       return 80
     end
 
     init init_tk(text: String, loc: Location)
@@ -1044,7 +1071,7 @@ end
 redef class TAttrid
     redef fun parser_index: Int
     do
-       return 79
+       return 81
     end
 
     init init_tk(text: String, loc: Location)
@@ -1057,7 +1084,7 @@ end
 redef class TNumber
     redef fun parser_index: Int
     do
-       return 80
+       return 82
     end
 
     init init_tk(text: String, loc: Location)
@@ -1070,7 +1097,7 @@ end
 redef class TFloat
     redef fun parser_index: Int
     do
-       return 81
+       return 83
     end
 
     init init_tk(text: String, loc: Location)
@@ -1083,7 +1110,7 @@ end
 redef class TChar
     redef fun parser_index: Int
     do
-       return 82
+       return 84
     end
 
     init init_tk(text: String, loc: Location)
@@ -1096,7 +1123,7 @@ end
 redef class TString
     redef fun parser_index: Int
     do
-       return 83
+       return 85
     end
 
     init init_tk(text: String, loc: Location)
@@ -1109,7 +1136,7 @@ end
 redef class TStartString
     redef fun parser_index: Int
     do
-       return 84
+       return 86
     end
 
     init init_tk(text: String, loc: Location)
@@ -1122,7 +1149,7 @@ end
 redef class TMidString
     redef fun parser_index: Int
     do
-       return 85
+       return 87
     end
 
     init init_tk(text: String, loc: Location)
@@ -1135,7 +1162,7 @@ end
 redef class TEndString
     redef fun parser_index: Int
     do
-       return 86
+       return 88
     end
 
     init init_tk(text: String, loc: Location)
@@ -1149,7 +1176,7 @@ end
 redef class EOF
     redef fun parser_index: Int
     do
-       return 87
+       return 89
     end
 
     init(loc: Location)
@@ -1160,7 +1187,7 @@ redef class EOF
 end
 
 redef class AError
-    readable writable var _message: String
+    readable var _message: String
 
     init init_error(message: String, loc: Location)
     do
@@ -1173,6 +1200,7 @@ end
 # The lexer extract NIT tokens from an input stream.
 # It is better user with the Parser
 class Lexer
+special TablesCapable
        # Last peeked token
        var _token: nullable Token
 
@@ -1217,8 +1245,6 @@ class Lexer
                _stream = stream
                _stream_pos = -1
                _stream_buf = new Buffer
-               build_goto_table
-               build_accept_table
        end
 
        # Give the next token (but do not consume it)
@@ -1255,12 +1281,10 @@ class Lexer
                var accept_pos = -1
                var accept_line = -1
 
-               var goto_table = _goto_table[_state]
-               var accept = _accept_table[_state]
                var text = _text
                text.clear
 
-               while true do
+               loop
                        var c = get_char
 
                        if c != -1 then
@@ -1285,8 +1309,7 @@ class Lexer
 
                                text.add(c.ascii)
 
-                               var first_loop = true # aka until
-                               while dfa_state < -1 or first_loop do
+                               loop
                                        var old_state = dfa_state
                                        if dfa_state < -1 then
                                                old_state = -2 - dfa_state
@@ -1294,27 +1317,25 @@ class Lexer
 
                                        dfa_state = -1
 
-                                       var tmp0 = goto_table[old_state]
                                        var low = 0
-                                       var high = tmp0.length - 1
+                                       var high = lexer_goto(old_state, 0) - 1
 
                                        if high >= 0 then
-                                               var tmp1 = tmp0.intern_items
                                                while low <= high do
                                                        var middle = (low + high) / 2
-                                                       var tmp2 = tmp1[middle].intern_items
+                                                       var offset = middle * 3 + 1 # +1 because length is at 0
 
-                                                       if c < tmp2[0] then
+                                                       if c < lexer_goto(old_state, offset) then
                                                                high = middle - 1
-                                                       else if c > tmp2[1] then
+                                                       else if c > lexer_goto(old_state, offset+1) then
                                                                low = middle + 1
                                                        else
-                                                               dfa_state = tmp2[2]
-                                                               low = high + 1 # aka break
+                                                               dfa_state = lexer_goto(old_state, offset+2)
+                                                               break
                                                        end
                                                end
                                        end
-                                       first_loop = false # aka until
+                                       if dfa_state > -2 then break
                                end
 
                                _cr = cr
@@ -1325,735 +1346,306 @@ class Lexer
                        end
 
                        if dfa_state >= 0 then
-                               if accept[dfa_state] != -1 then
+                               var tok = lexer_accept(dfa_state)
+                               if tok != -1 then
                                        accept_state = dfa_state
-                                       accept_token = accept[dfa_state]
+                                       accept_token = tok
                                        accept_length = text.length
                                        accept_pos = _pos
                                        accept_line = _line
                                end
                        else
                                if accept_state != -1 then
+                                       var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
+                                       _pos = accept_pos
+                                       _line = accept_line
+                                       push_back(accept_length)
                                        if accept_token == 0 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
                                                return null
                                        end
                                        if accept_token == 1 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
                                                var token_text = text.substring(0, accept_length)
-                                               var token = new TEol.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TEol.init_tk(token_text, location)
                                        end
                                        if accept_token == 2 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
                                                var token_text = text.substring(0, accept_length)
-                                               var token = new TComment.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TComment.init_tk(token_text, location)
                                        end
                                        if accept_token == 3 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwpackage.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwpackage.init_tk(location)
                                        end
                                        if accept_token == 4 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwimport.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwimport.init_tk(location)
                                        end
                                        if accept_token == 5 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwclass.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwclass.init_tk(location)
                                        end
                                        if accept_token == 6 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwabstract.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwabstract.init_tk(location)
                                        end
                                        if accept_token == 7 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwinterface.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwinterface.init_tk(location)
                                        end
                                        if accept_token == 8 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwuniversal.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwuniversal.init_tk(location)
                                        end
                                        if accept_token == 9 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwspecial.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwspecial.init_tk(location)
                                        end
                                        if accept_token == 10 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwend.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwend.init_tk(location)
                                        end
                                        if accept_token == 11 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token_text = text.substring(0, accept_length)
-                                               var token = new TKwmeth.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwmeth.init_tk(location)
                                        end
                                        if accept_token == 12 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwtype.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwtype.init_tk(location)
                                        end
                                        if accept_token == 13 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwattr.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwinit.init_tk(location)
                                        end
                                        if accept_token == 14 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwinit.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwredef.init_tk(location)
                                        end
                                        if accept_token == 15 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwredef.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwis.init_tk(location)
                                        end
                                        if accept_token == 16 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwis.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwdo.init_tk(location)
                                        end
                                        if accept_token == 17 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwdo.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwreadable.init_tk(location)
                                        end
                                        if accept_token == 18 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwreadable.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwwritable.init_tk(location)
                                        end
                                        if accept_token == 19 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwwritable.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwvar.init_tk(location)
                                        end
                                        if accept_token == 20 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwvar.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwintern.init_tk(location)
                                        end
                                        if accept_token == 21 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwintern.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwextern.init_tk(location)
                                        end
                                        if accept_token == 22 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwextern.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwprotected.init_tk(location)
                                        end
                                        if accept_token == 23 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwprotected.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwprivate.init_tk(location)
                                        end
                                        if accept_token == 24 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwprivate.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwintrude.init_tk(location)
                                        end
                                        if accept_token == 25 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwintrude.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwif.init_tk(location)
                                        end
                                        if accept_token == 26 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwif.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwthen.init_tk(location)
                                        end
                                        if accept_token == 27 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwthen.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwelse.init_tk(location)
                                        end
                                        if accept_token == 28 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwelse.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwwhile.init_tk(location)
                                        end
                                        if accept_token == 29 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwwhile.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwloop.init_tk(location)
                                        end
                                        if accept_token == 30 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwfor.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwfor.init_tk(location)
                                        end
                                        if accept_token == 31 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwin.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwin.init_tk(location)
                                        end
                                        if accept_token == 32 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwand.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwand.init_tk(location)
                                        end
                                        if accept_token == 33 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwor.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwor.init_tk(location)
                                        end
                                        if accept_token == 34 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwnot.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwnot.init_tk(location)
                                        end
                                        if accept_token == 35 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwreturn.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwreturn.init_tk(location)
                                        end
                                        if accept_token == 36 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwcontinue.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwcontinue.init_tk(location)
                                        end
                                        if accept_token == 37 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwbreak.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwbreak.init_tk(location)
                                        end
                                        if accept_token == 38 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwabort.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwabort.init_tk(location)
                                        end
                                        if accept_token == 39 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwassert.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwassert.init_tk(location)
                                        end
                                        if accept_token == 40 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwnew.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwnew.init_tk(location)
                                        end
                                        if accept_token == 41 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwisa.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwisa.init_tk(location)
                                        end
                                        if accept_token == 42 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwonce.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwonce.init_tk(location)
                                        end
                                        if accept_token == 43 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwsuper.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwsuper.init_tk(location)
                                        end
                                        if accept_token == 44 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwself.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwself.init_tk(location)
                                        end
                                        if accept_token == 45 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwtrue.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwtrue.init_tk(location)
                                        end
                                        if accept_token == 46 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwfalse.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwfalse.init_tk(location)
                                        end
                                        if accept_token == 47 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwnull.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwnull.init_tk(location)
                                        end
                                        if accept_token == 48 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwas.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwas.init_tk(location)
                                        end
                                        if accept_token == 49 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwwith.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwnullable.init_tk(location)
                                        end
                                        if accept_token == 50 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwnullable.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwisset.init_tk(location)
                                        end
                                        if accept_token == 51 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwisset.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TKwlabel.init_tk(location)
                                        end
                                        if accept_token == 52 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TKwlabel.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TOpar.init_tk(location)
                                        end
                                        if accept_token == 53 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TOpar.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TCpar.init_tk(location)
                                        end
                                        if accept_token == 54 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TCpar.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TObra.init_tk(location)
                                        end
                                        if accept_token == 55 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TObra.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TCbra.init_tk(location)
                                        end
                                        if accept_token == 56 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TCbra.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TComma.init_tk(location)
                                        end
                                        if accept_token == 57 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TComma.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TColumn.init_tk(location)
                                        end
                                        if accept_token == 58 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TColumn.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TQuad.init_tk(location)
                                        end
                                        if accept_token == 59 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TQuad.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TAssign.init_tk(location)
                                        end
                                        if accept_token == 60 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TAssign.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TPluseq.init_tk(location)
                                        end
                                        if accept_token == 61 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TPluseq.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TMinuseq.init_tk(location)
                                        end
                                        if accept_token == 62 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TMinuseq.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TDotdotdot.init_tk(location)
                                        end
                                        if accept_token == 63 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TDotdotdot.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TDotdot.init_tk(location)
                                        end
                                        if accept_token == 64 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TDotdot.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TDot.init_tk(location)
                                        end
                                        if accept_token == 65 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TDot.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TPlus.init_tk(location)
                                        end
                                        if accept_token == 66 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TPlus.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TMinus.init_tk(location)
                                        end
                                        if accept_token == 67 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TMinus.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TStar.init_tk(location)
                                        end
                                        if accept_token == 68 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TStar.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TSlash.init_tk(location)
                                        end
                                        if accept_token == 69 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TSlash.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TPercent.init_tk(location)
                                        end
                                        if accept_token == 70 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TPercent.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TEq.init_tk(location)
                                        end
                                        if accept_token == 71 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TEq.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TNe.init_tk(location)
                                        end
                                        if accept_token == 72 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TNe.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TLt.init_tk(location)
                                        end
                                        if accept_token == 73 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TLt.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TLe.init_tk(location)
                                        end
                                        if accept_token == 74 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TLe.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TLl.init_tk(location)
                                        end
                                        if accept_token == 75 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TGt.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TGt.init_tk(location)
                                        end
                                        if accept_token == 76 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TGe.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TGe.init_tk(location)
                                        end
                                        if accept_token == 77 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token = new TStarship.init_tk(location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TGg.init_tk(location)
                                        end
                                        if accept_token == 78 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token_text = text.substring(0, accept_length)
-                                               var token = new TClassid.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TStarship.init_tk(location)
                                        end
                                        if accept_token == 79 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
-                                               var token_text = text.substring(0, accept_length)
-                                               var token = new TId.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TBang.init_tk(location)
                                        end
                                        if accept_token == 80 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
                                                var token_text = text.substring(0, accept_length)
-                                               var token = new TAttrid.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TClassid.init_tk(token_text, location)
                                        end
                                        if accept_token == 81 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
                                                var token_text = text.substring(0, accept_length)
-                                               var token = new TNumber.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TId.init_tk(token_text, location)
                                        end
                                        if accept_token == 82 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
                                                var token_text = text.substring(0, accept_length)
-                                               var token = new TFloat.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TAttrid.init_tk(token_text, location)
                                        end
                                        if accept_token == 83 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
                                                var token_text = text.substring(0, accept_length)
-                                               var token = new TChar.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TNumber.init_tk(token_text, location)
                                        end
                                        if accept_token == 84 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
                                                var token_text = text.substring(0, accept_length)
-                                               var token = new TString.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TFloat.init_tk(token_text, location)
                                        end
                                        if accept_token == 85 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
                                                var token_text = text.substring(0, accept_length)
-                                               var token = new TStartString.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TChar.init_tk(token_text, location)
                                        end
                                        if accept_token == 86 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
                                                var token_text = text.substring(0, accept_length)
-                                               var token = new TMidString.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TString.init_tk(token_text, location)
                                        end
                                        if accept_token == 87 then
-                                               var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
                                                var token_text = text.substring(0, accept_length)
-                                               var token = new TEndString.init_tk(token_text, location)
-                                               push_back(accept_length)
-                                               _pos = accept_pos
-                                               _line = accept_line
-                                               return token
+                                               return new TStartString.init_tk(token_text, location)
+                                       end
+                                       if accept_token == 88 then
+                                               var token_text = text.substring(0, accept_length)
+                                               return new TMidString.init_tk(token_text, location)
+                                       end
+                                       if accept_token == 89 then
+                                               var token_text = text.substring(0, accept_length)
+                                               return new TEndString.init_tk(token_text, location)
                                        end
                                else
-                                       var location = new Location(_filename, start_line + 1, accept_line + 1, start_pos + 1, accept_pos)
+                                       var location = new Location(_filename, start_line + 1, start_line + 1, start_pos + 1, start_pos + 1)
                                        if text.length > 0 then
-                                               var token = new AError.init_error("Unknown token: {text}", location)
+                                               var token = new AError.init_error("Syntax error: unknown token {text}.", location)
                                                return token
                                        else
                                                var token = new EOF(location)
@@ -2061,8 +1653,9 @@ class Lexer
                                        end
                                end
                        end
+                       if false then break # FIXME remove once unreach loop exits are in c_src
                end
-               return null
+               return null # FIXME remove once unreach loop exits are in c_src
        end
 
        # Read the next character.
@@ -2104,1255 +1697,5 @@ class Lexer
                        i = i - 1
                end
        end
-
-       var _goto_table: Array[Array[Array[Array[Int]]]]
-       private fun build_goto_table
-       do
-               _goto_table = once [
-                       [
-                               [
-                                       [9, 9, 1],
-                                       [10, 10, 2],
-                                       [13, 13, 3],
-                                       [32, 32, 4],
-                                       [33, 33, 5],
-                                       [34, 34, 6],
-                                       [35, 35, 7],
-                                       [37, 37, 8],
-                                       [39, 39, 9],
-                                       [40, 40, 10],
-                                       [41, 41, 11],
-                                       [42, 42, 12],
-                                       [43, 43, 13],
-                                       [44, 44, 14],
-                                       [45, 45, 15],
-                                       [46, 46, 16],
-                                       [47, 47, 17],
-                                       [48, 57, 18],
-                                       [58, 58, 19],
-                                       [60, 60, 20],
-                                       [61, 61, 21],
-                                       [62, 62, 22],
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-                                       [91, 91, 24],
-                                       [93, 93, 25],
-                                       [95, 95, 26],
-                                       [97, 97, 27],
-                                       [98, 98, 28],
-                                       [99, 99, 29],
-                                       [100, 100, 30],
-                                       [101, 101, 31],
-                                       [102, 102, 32],
-                                       [103, 104, 33],
-                                       [105, 105, 34],
-                                       [106, 107, 33],
-                                       [108, 108, 35],
-                                       [109, 109, 36],
-                                       [110, 110, 37],
-                                       [111, 111, 38],
-                                       [112, 112, 39],
-                                       [113, 113, 33],
-                                       [114, 114, 40],
-                                       [115, 115, 41],
-                                       [116, 116, 42],
-                                       [117, 117, 43],
-                                       [118, 118, 44],
-                                       [119, 119, 45],
-                                       [120, 122, 33],
-                                       [125, 125, 46]
-                               ],
-                               [
-                                       [9, 9, 1],
-                                       [32, 32, 4]
-                               ],
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-                               [
-                                       [10, 10, 47]
-                               ],
-                               [
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-                               ],
-                               [
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-                               ],
-                               [
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-                                       [11, 12, 49],
-                                       [14, 33, 49],
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-                                       [35, 91, 49],
-                                       [92, 92, 51],
-                                       [93, 122, 49],
-                                       [123, 123, 52],
-                                       [124, 255, 49]
-                               ],
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-                                       [11, 12, 53],
-                                       [13, 13, 55],
-                                       [14, 255, 53]
-                               ],
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-                                       [14, 38, 56],
-                                       [39, 39, 57],
-                                       [40, 255, 56]
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-                               nil_array,
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-                               [
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-                               ],
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-                               [
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-                               ],
-                               [
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-                                       [48, 57, 61]
-                               ],
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-                                       [48, 57, 18]
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-                               ],
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-                               ],
-                               [
-                                       [61, 61, 65]
-                               ],
-                               [
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-                                       [65, 90, 68],
-                                       [95, 95, 69],
-                                       [97, 122, 70]
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-                               [
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-                                       [116, 116, 79],
-                                       [117, 122, 75]
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-                               [
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-                                       [97, 113, 75],
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-                                       [115, 122, 75]
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-                               [
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-                                       [109, 110, 75],
-                                       [111, 111, 82],
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-                                       [112, 122, 75]
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-                                       [111, 111, 88],
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-                                       [117, 117, 89],
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-                                       [111, 111, 97],
-                                       [112, 116, 75],
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-                                       [118, 122, 75]
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-                                       [106, 113, 75],
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-                                       [34, 34, 116],
-                                       [35, 91, 115],
-                                       [92, 92, 117],
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-                               [
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-                               nil_array,
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-                                       [111, 122, 75]
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-                               [
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-                                       [112, 112, 141],
-                                       [113, 122, 75]
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-                                       [105, 105, 142],
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-                               [
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-                                       [115, 115, 145],
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-                                       [99, 99, 151],
-                                       [100, 122, 75]
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-                                       [99, 99, 152],
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-                                       [111, 111, 154],
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-                                       [117, 122, 75]
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-                                       [102, 122, 75]
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-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 172],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 113, -30],
-                                       [114, 114, 173],
-                                       [115, 122, 75]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 97, 174],
-                                       [98, 122, 75]
-                               ],
-                               [
-                                       [48, 114, -80],
-                                       [115, 115, 175],
-                                       [116, 122, 75]
-                               ],
-                               [
-                                       [48, 115, -81],
-                                       [116, 116, 176],
-                                       [117, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 177],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 178],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 114, -80],
-                                       [115, 115, 179],
-                                       [116, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 110, -32],
-                                       [111, 111, 180],
-                                       [112, 122, 75]
-                               ],
-                               [
-                                       [48, 115, -81],
-                                       [116, 116, 181],
-                                       [117, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 182],
-                                       [102, 113, 75],
-                                       [114, 114, 183],
-                                       [115, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 184],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 185],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 103, -44],
-                                       [104, 104, 186],
-                                       [105, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 107, -31],
-                                       [108, 108, 187],
-                                       [109, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 188],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 106, 75],
-                                       [107, 107, 189],
-                                       [108, 122, 75]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 117, 75],
-                                       [118, 118, 190],
-                                       [119, 122, 75]
-                               ],
-                               [
-                                       [48, 115, -81],
-                                       [116, 116, 191],
-                                       [117, 122, 75]
-                               ],
-                               [
-                                       [48, 99, -79],
-                                       [100, 100, 192],
-                                       [101, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 193],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 116, -110],
-                                       [117, 117, 194],
-                                       [118, 122, 75]
-                               ],
-                               [
-                                       [48, 101, -36],
-                                       [102, 102, 195],
-                                       [103, 122, 75]
-                               ],
-                               [
-                                       [48, 98, -101],
-                                       [99, 99, 196],
-                                       [100, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 197],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 109, -40],
-                                       [110, 110, 198],
-                                       [111, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 199],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 200],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 117, -155],
-                                       [118, 118, 201],
-                                       [119, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 107, -31],
-                                       [108, 108, 202],
-                                       [109, 122, 75]
-                               ],
-                               [
-                                       [48, 103, -44],
-                                       [104, 104, 203],
-                                       [105, 122, 75]
-                               ],
-                               [
-                                       [48, 115, -81],
-                                       [116, 116, 204],
-                                       [117, 122, 75]
-                               ],
-                               [
-                                       [0, 255, -48]
-                               ],
-                               [
-                                       [48, 115, -81],
-                                       [116, 116, 205],
-                                       [117, 122, 75]
-                               ],
-                               [
-                                       [48, 113, -30],
-                                       [114, 114, 206],
-                                       [115, 122, 75]
-                               ],
-                               [
-                                       [48, 113, -30],
-                                       [114, 114, 207],
-                                       [115, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 106, -154],
-                                       [107, 107, 208],
-                                       [108, 122, 75]
-                               ],
-                               [
-                                       [48, 114, -80],
-                                       [115, 115, 209],
-                                       [116, 122, 75]
-                               ],
-                               [
-                                       [48, 104, -94],
-                                       [105, 105, 210],
-                                       [106, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 113, -30],
-                                       [114, 114, 211],
-                                       [115, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 212],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 113, -30],
-                                       [114, 114, 213],
-                                       [115, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 113, -30],
-                                       [114, 114, 214],
-                                       [115, 122, 75]
-                               ],
-                               [
-                                       [48, 116, -110],
-                                       [117, 117, 215],
-                                       [118, 122, 75]
-                               ],
-                               [
-                                       [48, 115, -81],
-                                       [116, 116, 216],
-                                       [117, 122, 75]
-                               ],
-                               [
-                                       [48, 107, -31],
-                                       [108, 108, 217],
-                                       [109, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 97, 218],
-                                       [98, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 97, 219],
-                                       [98, 122, 75]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 97, 220],
-                                       [98, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 221],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 97, 222],
-                                       [98, 122, 75]
-                               ],
-                               [
-                                       [48, 101, -36],
-                                       [102, 102, 223],
-                                       [103, 122, 75]
-                               ],
-                               [
-                                       [48, 113, -30],
-                                       [114, 114, 224],
-                                       [115, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 104, -94],
-                                       [105, 105, 225],
-                                       [106, 122, 75]
-                               ],
-                               [
-                                       [48, 113, -30],
-                                       [114, 114, 226],
-                                       [115, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 227],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 228],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 97, 229],
-                                       [98, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 97, 230],
-                                       [98, 122, 75]
-                               ],
-                               [
-                                       [48, 115, -81],
-                                       [116, 116, 231],
-                                       [117, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 109, -40],
-                                       [110, 110, 232],
-                                       [111, 122, 75]
-                               ],
-                               [
-                                       [48, 109, -40],
-                                       [110, 110, 233],
-                                       [111, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 115, -81],
-                                       [116, 116, 234],
-                                       [117, 122, 75]
-                               ],
-                               [
-                                       [48, 101, -36],
-                                       [102, 102, 235],
-                                       [103, 109, 75],
-                                       [110, 110, 236],
-                                       [111, 122, 75]
-                               ],
-                               [
-                                       [48, 99, -79],
-                                       [100, 100, 237],
-                                       [101, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 97, -29],
-                                       [98, 98, 238],
-                                       [99, 122, 75]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 102, 75],
-                                       [103, 103, 239],
-                                       [104, 122, 75]
-                               ],
-                               [
-                                       [48, 115, -81],
-                                       [116, 116, 240],
-                                       [117, 122, 75]
-                               ],
-                               [
-                                       [48, 98, -101],
-                                       [99, 99, 241],
-                                       [100, 122, 75]
-                               ],
-                               [
-                                       [48, 97, -29],
-                                       [98, 98, 242],
-                                       [99, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 109, -40],
-                                       [110, 110, 243],
-                                       [111, 122, 75]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 97, 244],
-                                       [98, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 113, -30],
-                                       [114, 114, 245],
-                                       [115, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 97, -29],
-                                       [98, 98, 246],
-                                       [99, 122, 75]
-                               ],
-                               [
-                                       [48, 98, -101],
-                                       [99, 99, 247],
-                                       [100, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 116, -110],
-                                       [117, 117, 248],
-                                       [118, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 97, 249],
-                                       [98, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 250],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 107, -31],
-                                       [108, 108, 251],
-                                       [109, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 252],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 253],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 115, -81],
-                                       [116, 116, 254],
-                                       [117, 122, 75]
-                               ],
-                               [
-                                       [48, 107, -31],
-                                       [108, 108, 255],
-                                       [109, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 107, -31],
-                                       [108, 108, 256],
-                                       [109, 122, 75]
-                               ],
-                               [
-                                       [48, 114, -80],
-                                       [115, 115, 257],
-                                       [116, 122, 75]
-                               ],
-                               [
-                                       [48, 107, -31],
-                                       [108, 108, 258],
-                                       [109, 122, 75]
-                               ],
-                               [
-                                       [48, 115, -81],
-                                       [116, 116, 259],
-                                       [117, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 260],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 98, -101],
-                                       [99, 99, 261],
-                                       [100, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 262],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 263],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 264],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 95, -29],
-                                       [97, 97, 265],
-                                       [98, 122, 75]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 266],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 100, -38],
-                                       [101, 101, 267],
-                                       [102, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 99, -79],
-                                       [100, 100, 268],
-                                       [101, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 107, -31],
-                                       [108, 108, 269],
-                                       [109, 122, 75]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ],
-                               [
-                                       [48, 122, -35]
-                               ]
-                       ]
-               ]
-       end
-
-       private fun nil_array: Array[Array[Int]]
-       do
-               return once new Array[Array[Int]]
-       end
-
-       var _accept_table: Array[Array[Int]]
-       private fun build_accept_table do
-               _accept_table = once [
-                       [
-                               -1,0,1,1,0,-1,-1,-1,70,-1,53,54,68,66,57,67,65,69,81,58,73,60,75,78,55,56,-1,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,-1,1,72,-1,84,-1,85,-1,2,2,-1,83,61,62,64,82,-1,59,74,71,76,78,78,78,78,80,79,79,79,79,79,79,48,79,79,79,79,17,79,79,79,79,79,79,26,79,31,16,79,79,79,79,79,79,33,79,79,79,79,79,79,79,79,79,79,79,79,79,79,-1,87,-1,86,-1,2,63,77,80,80,80,80,79,79,32,79,79,79,79,79,79,10,79,79,30,11,79,79,79,41,79,79,79,40,34,79,79,79,79,79,79,79,79,79,79,79,79,79,79,79,20,79,79,79,-1,79,79,79,13,79,79,79,28,79,79,79,14,79,79,79,79,11,47,42,79,79,79,79,79,79,44,79,79,27,45,12,79,79,49,79,38,79,79,37,5,79,79,46,79,79,79,51,52,79,79,79,79,79,15,79,79,43,79,29,79,79,39,79,22,4,79,21,79,79,79,79,79,79,35,79,79,79,79,79,79,25,79,3,24,79,79,9,79,79,6,36,79,50,79,18,79,19,7,23,8
-
-                       ]
-               ]
-       end
 end