src/syntax/syntax.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2008 Jean Privat <jean@pryen.org>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 # Full syntax analysis of NIT AST.
  18 # Detect syntax and some metamodel errors.
  19 package syntax
  20
  21 import mmloader
  22 import mmbuilder
  23 import control_flow
  24 import typing
  25
  26 # Loader of nit source files
  27 class SrcModuleLoader
  28 special ModuleLoader
  29         redef type MODULE: MMSrcModule
  30
  31         redef meth file_type do return "nit"
  32
  33         redef meth parse_file(context, file, filename, name, dir)
  34         do
  35                 var lexer = new Lexer(file, filename)
  36                 var parser = new Parser(lexer)
  37                 var node_tree = parser.parse
  38                 if node_tree.n_base == null then
  39                         var err = node_tree.n_eof
  40                         assert err isa PError
  41                         context.error("{err.locate}: {err.message}")
  42                         exit(1)
  43                 end
  44                 var node_module = node_tree.n_base
  45                 assert node_module isa AModule
  46                 var module = new MMSrcModule(context, node_module, dir, name)
  47                 #module.filename = fname
  48                 #module.mtime = fname.file_stat.mtime
  49                 return module
  50         end
  51
  52         redef meth process_metamodel(context, module)
  53         do
  54                 module.process_supermodules(context)
  55                 module.process_syntax(context)
  56         end
  57
  58         init do end
  59 end
  60
  61 redef class MMContext
  62         # The current configuration/status of the tool
  63         readable writable attr _tc: ToolContext
  64 end
  65
  66 redef class MMSrcModule
  67         # Loading and syntax analysis of super modules
  68         private meth process_supermodules(tc: ToolContext)
  69         do
  70                 node.import_super_modules(tc, self)
  71
  72         end
  73
  74         # Syntax analysis and MM construction for the module
  75         # Require than supermodules are processed
  76         private meth process_syntax(tc: ToolContext)
  77         do
  78                 do_mmbuilder(tc)
  79                 if tc.error_count > 0 then exit(1)
  80
  81                 do_control_flow(tc)
  82                 if tc.error_count > 0 then exit(1)
  83
  84                 do_typing(tc)
  85                 if tc.error_count > 0 then exit(1)
  86         end
  87
  88 end
  89