1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
15 # AST nodes of the Nit language
16 # Was previously based on parser_abs.nit.
21 private import console
23 # Root of the AST class-hierarchy
25 # Location is set during AST building. Once built, location cannon be null.
26 # However, manual instantiated nodes may need more care.
27 var location
: Location is writable, noinit
29 # The location of the important part of the node (identifier or whatever)
30 fun hot_location
: Location do return location
32 # Display a message for the colored location of the node
33 fun debug
(message
: String)
35 sys
.stderr
.write
"{hot_location} {self.class_name}: {message}\n{hot_location.colored_line("0;32")}\n"
38 # Is `self` a token or a pure-structural production like `AQId`?
39 fun is_structural
: Bool do return false
41 # Write the subtree on stdout.
43 # Visit the subtree and display it with additional and useful information.
45 # By default, this displays all kind of nodes and the corresponding lines of codes.
47 # See `ASTDump` for details.
48 fun dump_tree
(display_structural
, display_line
: nullable Bool)
50 var d
= new ASTDump(display_structural
or else true, display_line
or else true)
52 d
.write_to
(sys
.stdout
)
55 # Information to display on a node
57 # Refine this method to add additional information on each node type.
58 fun dump_info
(v
: ASTDump): String do return ""
60 # Parent of the node in the AST
61 var parent
: nullable ANode = null
63 # The topmost ancestor of the element
64 # This just apply `parent` until the first one
70 if p
== null then return res
75 # The most specific common parent between `self` and `other`
76 # Return null if the two node are unrelated (distinct root)
77 fun common_parent
(other
: ANode): nullable ANode
79 # First, get the same depth
80 var s
: nullable ANode = self
81 var o
: nullable ANode = other
82 var d
= s
.depth
- o
.depth
91 assert o
.depth
== s
.depth
92 # Second, go up until same in found
100 # Number of nodes between `self` and the `root` of the AST
101 # ENSURE `self == self.root implies result == 0 `
102 # ENSURE `self != self.root implies result == self.parent.depth + 1`
109 if p
== null then return res
115 # Replace a child with an other node in the AST
116 private fun replace_child
(old_child
: ANode, new_child
: nullable ANode) is abstract
118 # Detach a node from its parent
119 # Aborts if the node is not detachable. use `replace_with` instead
120 # REQUIRE: parent != null
121 # REQUIRE: is_detachable
122 # ENDURE: parent == null
125 assert parent
!= null
126 parent
.replace_child
(self, null)
130 # Replace itself with an other node in the AST
131 # REQUIRE: parent != null
132 # ENSURE: node.parent == old(parent)
133 # ENSURE: parent == null
134 fun replace_with
(node
: ANode)
136 assert parent
!= null
137 parent
.replace_child
(self, node
)
141 # Visit all nodes in order.
142 # Thus, call `v.enter_visit(e)` for each child `e`
143 fun visit_all
(v
: Visitor) is abstract
145 # Do a deep search and return an array of tokens that match a given text
146 fun collect_tokens_by_text
(text
: String): Array[Token]
148 var v
= new CollectTokensByTextVisitor(text
)
153 # Do a deep search and return an array of node that are annotated
154 # The attached node can be retrieved by two invocations of parent
155 fun collect_annotations_by_name
(name
: String): Array[AAnnotation]
157 var v
= new CollectAnnotationsByNameVisitor(name
)
163 private class CollectTokensByTextVisitor
166 var result
= new Array[Token]
167 redef fun visit
(node
)
170 if node
isa Token and node
.text
== text
then result
.add
(node
)
174 private class CollectAnnotationsByNameVisitor
177 var result
= new Array[AAnnotation]
178 redef fun visit
(node
)
181 if node
isa AAnnotation and node
.n_atid
.n_id
.text
== name
then result
.add
(node
)
185 # A helper class to handle (print) Nit AST as an OrderedTree
188 super OrderedTree[ANode]
190 # Reference to the last parent in the Ordered Tree
191 # Is used to handle the initial node parent and workaround possible inconsistent `ANode::parent`
192 private var last_parent
: nullable ANode = null
194 # Display tokens and structural production?
196 # Should tokens (and structural production like AQId) be displayed?
197 var display_structural
: Bool
201 # Should each new line be displayed (numbered and in gray)?
202 var display_line
: Bool
204 # Current line number (when printing lines)
209 if not display_structural
and n
.is_structural
then return
217 redef fun write_line
(o
, n
, p
)
220 var ls
= n
.location
.line_start
221 var file
= n
.location
.file
223 if ls
> line
and file
!= null then
224 if line
== 0 then line
= ls
- 1
227 o
.write
"{line}\t{file.get_line(line)}\n".light_gray
238 return "{n.class_name} {n.dump_info(self)} @{n.location}"
242 fun yellow
(s
: String): String do return s
.yellow
245 fun red
(s
: String): String do return s
.red
248 # A sequence of nodes
249 # It is a specific class (instead of using a Array) to track the parent/child relation when nodes are added or removed
250 class ANodes[E
: ANode]
252 private var parent
: ANode
253 private var items
= new Array[E
]
254 redef fun iterator
do return items
.iterator
255 redef fun reverse_iterator
do return items
.reverse_iterator
256 redef fun length
do return items
.length
257 redef fun is_empty
do return items
.is_empty
276 var res
= items
.shift
288 redef fun []=(index
, e
)
290 hook_remove
(self[index
])
294 redef fun remove_at
(index
)
296 hook_remove
(items
[index
])
297 items
.remove_at
(index
)
299 private fun hook_add
(e
: E
)
301 #assert e.parent == null
304 private fun hook_remove
(e
: E
)
306 assert e
.parent
== parent
310 # Used in parent constructor to fill elements
311 private fun unsafe_add_all
(nodes
: Collection[Object])
313 var parent
= self.parent
321 private fun replace_child
(old_child
: ANode, new_child
: nullable ANode): Bool
323 var parent
= self.parent
324 for i
in [0..length
[ do
325 if self[i
] == old_child
then
326 if new_child
!= null then
327 assert new_child
isa E
329 new_child
.parent
= parent
339 private fun visit_all
(v
: Visitor)
341 for n
in self do v
.enter_visit
(n
)
345 # Ancestor of all tokens
346 # A token is a node that has a `text` but no children.
350 # The raw content on the token
351 fun text
: String is abstract
353 # The raw content on the token
354 fun text
=(text
: String) is abstract
356 # The previous token in the Lexer.
357 # May have disappeared in the AST
358 var prev_token
: nullable Token = null
360 # The next token in the Lexer.
361 # May have disappeared in the AST
362 var next_token
: nullable Token = null
364 # Is `self` a token discarded from the AST?
366 # Loose tokens are not present in the AST.
367 # It means they were identified by the lexer but were discarded by the parser.
368 # It also means that they are not visited or manipulated by AST-related functions.
370 # Each loose token is attached to the non-loose token that precedes or follows it.
371 # The rules are the following:
373 # * tokens that follow a non-loose token on a same line are attached to it.
375 # * other tokens, thus that precede a non-loose token on the same line or the next one,
376 # are attached to this one. See `prev_looses`.
378 # Loose tokens are mostly end of lines (`TEol`) and comments (`TComment`).
379 # Whitespace are ignored by the lexer, so they are not even considered as loose tokens.
380 # See `blank_before` to get the whitespace that separate tokens.
383 redef fun is_structural
do return true
385 redef fun dump_info
(v
) do return " {text.escape_to_c}"
387 # Loose tokens that precede `self`.
389 # These tokens start the line or belong to a line with only loose tokens.
390 var prev_looses
= new Array[Token] is lazy
392 # Loose tokens that follow `self`
394 # These tokens are on the same line than `self`.
395 var next_looses
= new Array[Token] is lazy
397 # The verbatim blank text between `prev_token` and `self`
398 fun blank_before
: String
400 if prev_token
== null then return ""
401 var from
= prev_token
.location
.pend
+1
402 var to
= location
.pstart
403 return location
.file
.string
.substring
(from
,to-from
)
406 redef fun to_s
: String do
410 redef fun visit_all
(v
: Visitor) do end
411 redef fun replace_child
(old_child
: ANode, new_child
: nullable ANode) do end
414 redef class SourceFile
415 # The first token parser by the lexer
416 # May have disappeared in the final AST
417 var first_token
: nullable Token = null
419 # The first token parser by the lexer
420 # May have disappeared in the final AST
421 var last_token
: nullable Token = null
424 # Ancestor of all productions
425 # A production is a node without text but that usually has children.
429 # All the annotations attached directly to the node
430 var n_annotations
: nullable AAnnotations = null is writable
432 # Return all its annotations of a given name in the order of their declaration
433 # Retun an empty array if no such an annotation.
434 fun get_annotations
(name
: String): Array[AAnnotation]
436 var res
= new Array[AAnnotation]
437 var nas
= n_annotations
438 if nas
!= null then for na
in nas
.n_items
do
439 if na
.name
!= name
then continue
442 if self isa AClassdef then for na
in n_propdefs
do
443 if na
isa AAnnotPropdef then
444 if na
.name
!= name
then continue
452 redef fun replace_with
(n
: ANode)
456 if not isset n
._location
and isset _location
then n
._location
= _location
460 # Abstract standard visitor on the AST
461 abstract class Visitor
462 # What the visitor do when a node is visited
463 # Concrete visitors should implement this method.
465 protected fun visit
(e
: ANode) is abstract
467 # Ask the visitor to visit a given node.
468 # Usually automatically called by visit_all* methods.
469 # This method should not be redefined
470 fun enter_visit
(e
: nullable ANode)
472 if e
== null then return
473 var old
= _current_node
479 # The current visited node
480 var current_node
: nullable ANode = null is writable
483 # Token of end of line (basically `\n`)
492 # Token of a line of comments
493 # Starts with the `#` and contains the final end-of-line (if any)
498 # A token associated with a keyword
499 abstract class TokenKeyword
503 return "keyword '{text}'"
507 # The deprecated keyword `package`.
512 # The keyword `module`
517 # The keyword `import`
522 # The keyword `class`
527 # The keyword `abstract`
532 # The keyword `interface`
537 # The keywords `enum` ane `universal`
562 # The keyword `redef`
577 # The keyword `catch`
587 # The keyword `extern`
592 # The keyword `public`
597 # The keyword `protected`
602 # The keyword `private`
607 # The keyword `intrude`
627 # The keyword `while`
657 # The keyword `implies`
667 # The keyword `return`
672 # The keyword `continue`
677 # The keyword `break`
682 # The keyword `abort`
687 # The keyword `assert`
707 # The keyword `super`
722 # The keyword `false`
737 # The keyword `nullable`
742 # The keyword `isset`
747 # The keyword `label`
757 # The keyword `yield`
762 # The special keyword `__DEBUG__`
807 # A token associated with an operator (and other lookalike symbols)
808 abstract class TokenOperator
812 return "operator '{text}'"
996 # A class (or formal type) identifier. They start with an uppercase.
1001 do return "type identifier '{text}'"
1005 # A standard identifier (variable, method...). They start with a lowercase.
1010 do return "identifier '{text}'"
1014 # An attribute identifier. They start with an underscore.
1019 do return "attribute '{text}'"
1023 # A token of a literal value (string, integer, etc).
1024 abstract class TokenLiteral
1028 do return "literal value '{text}'"
1037 # A literal floating point number
1042 # A literal character
1052 # The starting part of a super string (between `"` and `{`)
1057 # The middle part of a super string (between `}` and `{`)
1062 # The final part of a super string (between `}` and `"`)
1067 # A malformed string
1072 do return "malformed string {text}"
1081 do return "malformed character {text}"
1085 # A extern code block
1086 class TExternCodeSegment
1095 return "end of file"
1099 # A mark of an error
1103 # A lexical error (unexpected character)
1107 # A syntactic error (unexpected token)
1112 # The main node of a Nit source-file
1116 # The declaration part of the module
1117 var n_moduledecl
: nullable AModuledecl = null is writable
1119 # List of importation clauses
1120 var n_imports
= new ANodes[AImport](self)
1122 # List of extern blocks
1123 var n_extern_code_blocks
= new ANodes[AExternCodeBlock](self)
1125 # List of class definition (including top-level methods and the main)
1126 var n_classdefs
= new ANodes[AClassdef](self)
1129 # Abstract class for definition of entities
1130 abstract class ADefinition
1133 var n_doc
: nullable ADoc = null is writable
1135 # The `redef` keyword
1136 var n_kwredef
: nullable TKwredef = null is writable
1138 # The declared visibility
1139 var n_visibility
: nullable AVisibility = null is writable
1142 # The declaration of the module with the documentation, name, and annotations
1146 # The `module` keyword
1147 var n_kwmodule
: TKwmodule is writable, noinit
1149 # The declared module name
1150 var n_name
: AModuleName is writable, noinit
1153 # A import clause of a module
1154 abstract class AImport
1157 # The declared visibility
1158 var n_visibility
: AVisibility is writable, noinit
1160 # The `import` keyword
1161 var n_kwimport
: TKwimport is writable, noinit
1164 # A standard import clause. eg `import x`
1167 # The imported module name
1168 var n_name
: AModuleName is writable, noinit
1171 # The special import clause of the kernel module. eg `import end`
1174 # The `end` keyword, that indicate the root module
1175 var n_kwend
: TKwend is writable, noinit
1178 # A visibility modifier
1180 # The public visibility is an empty production (no keyword).
1182 # Note: even if some visibilities are only valid on some placse (for instance, no `protected` class or no `intrude` method)
1183 # the parser has no such a restriction, therefore the semantic phases has to check that the visibilities make sense.
1184 abstract class AVisibility
1188 # An implicit or explicit public visibility modifier
1189 class APublicVisibility
1191 # The `public` keyword, if any
1192 var n_kwpublic
: nullable TKwpublic = null is writable
1194 # An explicit private visibility modifier
1195 class APrivateVisibility
1197 # The `private` keyword
1198 var n_kwprivate
: TKwprivate is writable, noinit
1200 # An explicit protected visibility modifier
1201 class AProtectedVisibility
1203 # The `protected` keyword
1204 var n_kwprotected
: TKwprotected is writable, noinit
1206 # An explicit intrude visibility modifier
1207 class AIntrudeVisibility
1209 # The `intrude` keyword
1210 var n_kwintrude
: TKwintrude is writable, noinit
1213 # A class definition
1215 # While most definitions are `AStdClassdef`s,
1216 # there are 2 special cases of class definitions.
1217 abstract class AClassdef
1219 # All the declared properties (including the main method)
1220 var n_propdefs
= new ANodes[APropdef](self)
1223 # A standard class definition with a name, superclasses and properties
1228 # The class kind (interface, abstract class, etc.)
1229 var n_classkind
: AClasskind is writable, noinit
1231 # The name of the class
1232 var n_qid
: nullable AQclassid = null is writable
1235 var n_obra
: nullable TObra = null is writable
1237 # The list of formal parameter types
1238 var n_formaldefs
= new ANodes[AFormaldef](self)
1241 var n_cbra
: nullable TCbra = null is writable
1243 # The extern block code
1244 var n_extern_code_block
: nullable AExternCodeBlock = null is writable
1247 var n_kwend
: TKwend is writable, noinit
1249 fun n_superclasses
: Array[ASuperPropdef] do
1250 return [for d
in n_propdefs
do if d
isa ASuperPropdef then d
]
1253 redef fun hot_location
do return n_qid
.location
1256 # The implicit class definition of the implicit main method
1261 # The implicit class definition of the top-level methods
1266 # The modifier for the kind of class (abstract, interface, etc.)
1267 abstract class AClasskind
1271 # A default, or concrete class modifier (just `class`)
1272 class AConcreteClasskind
1275 # The `class` keyword.
1276 var n_kwclass
: TKwclass is writable, noinit
1279 # An abstract class modifier (`abstract class`)
1280 class AAbstractClasskind
1283 # The `abstract` keyword.
1284 var n_kwabstract
: TKwabstract is writable, noinit
1286 # The `class` keyword.
1287 var n_kwclass
: TKwclass is writable, noinit
1290 # An interface class modifier (`interface`)
1291 class AInterfaceClasskind
1294 # The `interface` keyword.
1295 var n_kwinterface
: TKwinterface is writable, noinit
1298 # An enum/universal class modifier (`enum class`)
1299 class AEnumClasskind
1302 # The `enum` keyword.
1303 var n_kwenum
: TKwenum is writable, noinit
1306 # An extern class modifier (`extern class`)
1307 class AExternClasskind
1310 # The `extern` keyword.
1311 var n_kwextern
: TKwextern is writable, noinit
1313 # The `class` keyword.
1314 var n_kwclass
: nullable TKwclass = null is writable
1317 # The definition of a formal generic parameter type. eg `X: Y`
1321 # The name of the parameter type
1322 var n_id
: TClassid is writable, noinit
1324 # The bound of the parameter type
1325 var n_type
: nullable AType = null is writable
1328 # The definition of a property
1329 abstract class APropdef
1333 # A definition of an attribute
1334 # For historical reason, old-syle and new-style attributes use the same `ANode` sub-class
1339 var n_kwvar
: TKwvar is writable, noinit
1341 # The identifier for a new-style attribute
1342 var n_id2
: TId is writable, noinit
1344 # The declared type of the attribute
1345 var n_type
: nullable AType = null is writable
1348 var n_assign
: nullable TAssign = null is writable
1350 # The initial value, if any (set with `=`)
1351 var n_expr
: nullable AExpr = null is writable
1354 var n_kwdo
: nullable TKwdo = null is writable
1356 # The initial value, if any (set with `do return`)
1357 var n_block
: nullable AExpr = null is writable
1360 var n_kwend
: nullable TKwend = null is writable
1362 redef fun hot_location
1364 return n_id2
.location
1368 # A definition of all kind of method (including constructors)
1372 # The `fun` keyword, if any
1373 var n_kwmeth
: nullable TKwmeth = null is writable
1375 # The `init` keyword, if any
1376 var n_kwinit
: nullable TKwinit = null is writable
1378 # The `new` keyword, if any
1379 var n_kwnew
: nullable TKwnew = null is writable
1381 # The name of the method, if any
1382 var n_methid
: nullable AMethid = null is writable
1384 # The signature of the method, if any
1385 var n_signature
: nullable ASignature = null is writable
1388 var n_kwdo
: nullable TKwdo = null is writable
1390 # The body (in Nit) of the method, if any
1391 var n_block
: nullable AExpr = null is writable
1394 var n_kwend
: nullable TKwend = null is writable
1396 # The list of declared callbacks (for extern methods)
1397 var n_extern_calls
: nullable AExternCalls = null is writable
1399 # The body (in extern code) of the method, if any
1400 var n_extern_code_block
: nullable AExternCodeBlock = null is writable
1402 redef fun hot_location
1404 if n_methid
!= null then
1405 return n_methid
.location
1406 else if n_kwinit
!= null then
1407 return n_kwinit
.location
1408 else if n_kwnew
!= null then
1409 return n_kwnew
.location
1416 # The implicit main method
1417 class AMainMethPropdef
1426 # A super-class. eg `super X`
1431 var n_kwsuper
: TKwsuper is writable, noinit
1433 # The super-class (indicated as a type)
1434 var n_type
: AType is writable, noinit
1438 # Declaration of callbacks for extern methods
1442 # The `import` keyword
1443 var n_kwimport
: TKwimport is writable, noinit
1445 # The list of declared callbacks
1446 var n_extern_calls
: ANodes[AExternCall] = new ANodes[AExternCall](self)
1449 # A single callback declaration
1450 abstract class AExternCall
1454 # A single callback declaration on a method
1455 abstract class APropExternCall
1459 # A single callback declaration on a method on the current receiver
1460 class ALocalPropExternCall
1461 super APropExternCall
1463 # The name of the called-back method
1464 var n_methid
: AMethid is writable, noinit
1467 # A single callback declaration on a method on an explicit receiver type.
1468 class AFullPropExternCall
1469 super APropExternCall
1471 # The type of the receiver of the called-back method
1472 var n_type
: AType is writable, noinit
1475 var n_dot
: nullable TDot = null is writable
1477 # The name of the called-back method
1478 var n_methid
: AMethid is writable, noinit
1481 # A single callback declaration on a method on a constructor
1482 class AInitPropExternCall
1483 super APropExternCall
1485 # The allocated type
1486 var n_type
: AType is writable, noinit
1489 # A single callback declaration on a `super` call
1490 class ASuperExternCall
1493 # The `super` keyword
1494 var n_kwsuper
: TKwsuper is writable, noinit
1497 # A single callback declaration on a cast
1498 abstract class ACastExternCall
1502 # A single callback declaration on a cast to a given type
1503 class ACastAsExternCall
1504 super ACastExternCall
1506 # The origin type of the cast
1507 var n_from_type
: AType is writable, noinit
1510 var n_dot
: nullable TDot = null is writable
1513 var n_kwas
: TKwas is writable, noinit
1515 # The destination of the cast
1516 var n_to_type
: AType is writable, noinit
1519 # A single callback declaration on a cast to a nullable type
1520 class AAsNullableExternCall
1521 super ACastExternCall
1523 # The origin type to cast as nullable
1524 var n_type
: AType is writable, noinit
1527 var n_kwas
: TKwas is writable, noinit
1529 # The `nullable` keyword
1530 var n_kwnullable
: TKwnullable is writable, noinit
1533 # A single callback declaration on a cast to a non-nullable type
1534 class AAsNotNullableExternCall
1535 super ACastExternCall
1537 # The destination type on a cast to not nullable
1538 var n_type
: AType is writable, noinit
1541 var n_kwas
: TKwas is writable, noinit
1544 var n_kwnot
: TKwnot is writable, noinit
1546 # The `nullable` keyword
1547 var n_kwnullable
: TKwnullable is writable, noinit
1550 # A definition of a virtual type
1554 # The `type` keyword
1555 var n_kwtype
: TKwtype is writable, noinit
1557 # The name of the virtual type
1558 var n_qid
: AQclassid is writable, noinit
1560 # The bound of the virtual type
1561 var n_type
: AType is writable, noinit
1564 # The identifier of a method in a method declaration.
1565 # There is a specific class because of operator and setters.
1566 abstract class AMethid
1570 # A method name with a simple identifier
1574 # The simple identifier
1575 var n_id
: TId is writable, noinit
1578 # A method name for an operator
1579 class AOperatorMethid
1582 # The associated operator symbol
1583 var n_op
: Token is writable, noinit
1587 super AOperatorMethid
1592 super AOperatorMethid
1597 super AOperatorMethid
1600 # A method name `**`
1601 class AStarstarMethid
1602 super AOperatorMethid
1607 super AOperatorMethid
1611 class APercentMethid
1612 super AOperatorMethid
1617 super AOperatorMethid
1622 super AOperatorMethid
1627 super AOperatorMethid
1632 super AOperatorMethid
1635 # A method name `==`
1637 super AOperatorMethid
1640 # A method name `!=`
1642 super AOperatorMethid
1645 # A method name `<=`
1647 super AOperatorMethid
1650 # A method name `>=`
1652 super AOperatorMethid
1657 super AOperatorMethid
1662 super AOperatorMethid
1665 # A method name `<<`
1667 super AOperatorMethid
1670 # A method name `>>`
1672 super AOperatorMethid
1675 # A method name `<=>`
1676 class AStarshipMethid
1677 super AOperatorMethid
1680 # A method name `[]`
1685 var n_obra
: TObra is writable, noinit
1688 var n_cbra
: TCbra is writable, noinit
1691 # A setter method name with a simple identifier (with a `=`)
1695 # The base identifier
1696 var n_id
: TId is writable, noinit
1699 var n_assign
: TAssign is writable, noinit
1702 # A method name `[]=`
1703 class ABraassignMethid
1707 var n_obra
: TObra is writable, noinit
1710 var n_cbra
: TCbra is writable, noinit
1713 var n_assign
: TAssign is writable, noinit
1716 # A potentially qualified simple identifier `foo::bar::baz`
1719 # The qualifier, if any
1720 var n_qualified
: nullable AQualified = null is writable
1722 # The final identifier
1723 var n_id
: TId is writable, noinit
1725 redef fun is_structural
do return true
1728 # A potentially qualified class identifier `foo::bar::Baz`
1731 # The qualifier, if any
1732 var n_qualified
: nullable AQualified = null is writable
1734 # The final identifier
1735 var n_id
: TClassid is writable, noinit
1737 redef fun is_structural
do return true
1740 # A signature in a method definition. eg `(x,y:X,z:Z):T`
1745 var n_opar
: nullable TOpar = null is writable
1747 # The list of parameters
1748 var n_params
= new ANodes[AParam](self)
1751 var n_cpar
: nullable TCpar = null is writable
1754 var n_type
: nullable AType = null is writable
1757 # A parameter definition in a signature. eg `x:X`
1761 # The name of the parameter
1762 var n_id
: TId is writable, noinit
1764 # The type of the parameter, if any
1765 var n_type
: nullable AType = null is writable
1767 # The `...` symbol to indicate varargs
1768 var n_dotdotdot
: nullable TDotdotdot = null is writable
1771 # A static type. eg `nullable X[Y]`
1774 # The `nullable` keyword
1775 var n_kwnullable
: nullable TKwnullable = null is writable
1777 # The name of the class or of the formal type
1778 var n_qid
: AQclassid is writable, noinit
1780 # The opening bracket
1781 var n_obra
: nullable TObra = null is writable
1783 # Type arguments for a generic type
1784 var n_types
= new ANodes[AType](self)
1786 # The closing bracket
1787 var n_cbra
: nullable TCbra = null is writable
1790 # A label at the end of a block or in a break/continue statement. eg `label x`
1794 # The `label` keyword
1795 var n_kwlabel
: TKwlabel is writable, noinit
1797 # The name of the label, if any
1798 var n_id
: nullable TId is writable, noinit
1801 # Expression and statements
1802 # From a AST point of view there is no distinction between statement and expressions (even if the parser has to distinguish them)
1803 abstract class AExpr
1807 # A sequence of `AExpr` (usually statements)
1808 # The last `AExpr` gives the value of the whole block
1812 # The list of statements in the bloc.
1813 # The last element is often considered as an expression that give the value of the whole block.
1814 var n_expr
= new ANodes[AExpr](self)
1817 var n_kwend
: nullable TKwend = null is writable
1820 # A declaration of a local variable. eg `var x: X = y`
1825 var n_kwvar
: nullable TKwvar = null is writable
1827 # The name of the local variable
1828 var n_id
: TId is writable, noinit
1830 # The declaration type of the local variable
1831 var n_type
: nullable AType = null is writable
1833 # The `=` symbol (for the initial value)
1834 var n_assign
: nullable TAssign = null is writable
1836 # The initial value, if any
1837 var n_expr
: nullable AExpr = null is writable
1840 # A `return` statement. eg `return x`
1844 # The `return` keyword
1845 var n_kwreturn
: nullable TKwreturn = null is writable
1848 # A `yield` statement. eg `yield x`
1852 # The `yield` keyword
1853 var n_kwyield
: nullable TKwyield = null is writable
1855 # The return value, if any
1856 var n_expr
: nullable AExpr = null is writable
1859 # Something that has a label.
1860 abstract class ALabelable
1863 # The associated label declatation
1864 var n_label
: nullable ALabel = null is writable
1867 # A `break` or a `continue`
1868 abstract class AEscapeExpr
1872 # The return value, if nay (unused currently)
1873 var n_expr
: nullable AExpr = null is writable
1876 # A `break` statement.
1880 # The `break` keyword
1881 var n_kwbreak
: TKwbreak is writable, noinit
1884 # An `abort` statement
1888 # The `abort` keyword
1889 var n_kwabort
: TKwabort is writable, noinit
1892 # A `continue` statement
1896 # The `continue` keyword.
1897 var n_kwcontinue
: nullable TKwcontinue = null is writable
1906 var n_kwdo
: TKwdo is writable, noinit
1908 # The list of statements of the `do`.
1909 var n_block
: nullable AExpr = null is writable
1911 # The `catch` keyword
1912 var n_kwcatch
: nullable TKwcatch = null is writable
1914 # The do catch block
1915 var n_catch
: nullable AExpr = null is writable
1923 var n_kwif
: TKwif is writable, noinit
1925 # The expression used as the condition of the `if`
1926 var n_expr
: AExpr is writable, noinit
1928 # The `then` keyword
1929 var n_kwthen
: TKwthen is writable, noinit
1931 # The body of the `then` part
1932 var n_then
: nullable AExpr = null is writable
1934 # The `else` keyword
1935 var n_kwelse
: nullable TKwelse = null is writable
1937 # The body of the `else` part
1938 var n_else
: nullable AExpr = null is writable
1941 # A `if` expression (ternary conditional). eg. `if true then 1 else 0`
1946 var n_kwif
: TKwif is writable, noinit
1948 # The expression used as the condition of the `if`
1949 var n_expr
: AExpr is writable, noinit
1951 # The `then` keyword
1952 var n_kwthen
: TKwthen is writable, noinit
1954 # The expression in the `then` part
1955 var n_then
: AExpr is writable, noinit
1957 # The `else` keyword
1958 var n_kwelse
: TKwelse is writable, noinit
1960 # The expression in the `else` part
1961 var n_else
: AExpr is writable, noinit
1964 # A `while` statement
1969 # The `while` keyword
1970 var n_kwwhile
: TKwwhile is writable, noinit
1972 # The expression used as the condition of the `while`
1973 var n_expr
: AExpr is writable, noinit
1976 var n_kwdo
: TKwdo is writable, noinit
1978 # The body of the loop
1979 var n_block
: nullable AExpr = null is writable
1982 # A `loop` statement
1987 # The `loop` keyword
1988 var n_kwloop
: TKwloop is writable, noinit
1990 # The body of the loop
1991 var n_block
: nullable AExpr = null is writable
2000 var n_kwfor
: TKwfor is writable, noinit
2002 # The list of groups to iterate
2003 var n_groups
= new ANodes[AForGroup](self)
2006 var n_kwdo
: TKwdo is writable, noinit
2008 # The body of the loop
2009 var n_block
: nullable AExpr = null is writable
2012 # A collection iterated by a for, its automatic variables and its implicit iterator.
2014 # Standard `for` iterate on a single collection.
2015 # Multiple `for` can iterate on more than one collection at once.
2019 # The list of name of the automatic variables
2020 var n_ids
= new ANodes[TId](self)
2023 var n_kwin
: TKwin is writable, noinit
2025 # The expression used as the collection to iterate on
2026 var n_expr
: AExpr is writable, noinit
2029 # A `with` statement
2034 # The `with` keyword
2035 var n_kwwith
: TKwwith is writable, noinit
2037 # The expression used to get the value to control
2038 var n_expr
: AExpr is writable, noinit
2041 var n_kwdo
: TKwdo is writable, noinit
2043 # The body of the loop
2044 var n_block
: nullable AExpr = null is writable
2047 # An `assert` statement
2051 # The `assert` keyword
2052 var n_kwassert
: TKwassert is writable, noinit
2054 # The name of the assert, if any
2055 var n_id
: nullable TId = null is writable
2057 # The expression used as the condition of the `assert`
2058 var n_expr
: AExpr is writable, noinit
2060 # The `else` keyword
2061 var n_kwelse
: nullable TKwelse = null is writable
2063 # The body to execute when the assert fails
2064 var n_else
: nullable AExpr = null is writable
2067 # Whatever is a simple assignment. eg `= something`
2068 abstract class AAssignFormExpr
2072 var n_assign
: TAssign is writable, noinit
2074 # The right-value to assign.
2075 var n_value
: AExpr is writable, noinit
2078 # Whatever is a combined assignment. eg `+= something`
2079 abstract class AReassignFormExpr
2082 # The combined operator (eg. `+=`)
2083 var n_assign_op
: AAssignOp is writable, noinit
2085 # The right-value to apply on the combined operator.
2086 var n_value
: AExpr is writable, noinit
2089 # A `once` expression. eg `once x`
2093 # The `once` keyword
2094 var n_kwonce
: TKwonce is writable, noinit
2096 # The expression to evaluate only one time
2097 var n_expr
: AExpr is writable, noinit
2100 # A polymorphic invocation of a method
2101 # The form of the invocation (name, arguments, etc.) are specific
2102 abstract class ASendExpr
2104 # The receiver of the method invocation
2105 var n_expr
: AExpr is writable, noinit
2108 # A binary operation on a method
2109 abstract class ABinopExpr
2113 var n_op
: Token is writable, noinit
2115 # The second operand of the operation
2116 # Note: the receiver (`n_expr`) is the first operand
2117 var n_expr2
: AExpr is writable, noinit
2119 # The name of the operator (eg '+')
2120 fun operator
: String is abstract
2123 # Something that is boolean expression
2124 abstract class ABoolExpr
2128 # Something that is binary boolean expression
2129 abstract class ABinBoolExpr
2132 # The first boolean operand
2133 var n_expr
: AExpr is writable, noinit
2136 var n_op
: Token is writable, noinit
2138 # The second boolean operand
2139 var n_expr2
: AExpr is writable, noinit
2147 # A `and` expression
2152 # A `or else` expression
2156 # The `else` keyword
2157 var n_kwelse
: TKwelse is writable, noinit
2160 # A `implies` expression
2165 # A `not` expression
2170 var n_kwnot
: TKwnot is writable, noinit
2172 # The boolean operand of the `not`
2173 var n_expr
: AExpr is writable, noinit
2176 # A `==` or a `!=` expression
2178 # Both have a similar effect on adaptive typing, so this class factorizes the common behavior.
2186 redef fun operator
do return "=="
2192 redef fun operator
do return "!="
2198 redef fun operator
do return "<"
2204 redef fun operator
do return "<="
2210 redef fun operator
do return "<<"
2216 redef fun operator
do return ">"
2222 redef fun operator
do return ">="
2228 redef fun operator
do return ">>"
2231 # A type-ckeck expression. eg `x isa T`
2235 # The expression to check
2236 var n_expr
: AExpr is writable, noinit
2239 var n_kwisa
: TKwisa is writable, noinit
2241 # The destination type to check to
2242 var n_type
: AType is writable, noinit
2248 redef fun operator
do return "+"
2254 redef fun operator
do return "-"
2257 # A `<=>` expression
2260 redef fun operator
do return "<=>"
2266 redef fun operator
do return "*"
2272 redef fun operator
do return "**"
2278 redef fun operator
do return "/"
2284 redef fun operator
do return "%"
2290 redef fun operator
do return "|"
2296 redef fun operator
do return "^"
2302 redef fun operator
do return "&"
2305 # A unary operation on a method
2306 abstract class AUnaryopExpr
2310 var n_op
: Token is writable, noinit
2312 # The name of the operator (eg '+')
2313 fun operator
: String is abstract
2316 # A unary minus expression. eg `-x`
2319 redef fun operator
do return "-"
2322 # A unary plus expression. eg `+x`
2325 redef fun operator
do return "+"
2328 # A unary `~` expression
2331 redef fun operator
do return "~"
2334 # An explicit instantiation. eg `new T`
2339 var n_kwnew
: TKwnew is writable, noinit
2341 # The `type` keyword
2342 var n_type
: AType is writable, noinit
2344 # The name of the named-constructor, if any
2345 var n_qid
: nullable AQid = null is writable
2347 # The arguments of the `new`
2348 var n_args
: AExprs is writable, noinit
2351 # Whatever is a old-style attribute access
2352 abstract class AAttrFormExpr
2355 # The receiver of the attribute
2356 var n_expr
: AExpr is writable, noinit
2358 # The name of the attribute
2359 var n_id
: TAttrid is writable, noinit
2363 # The read of an attribute. eg `x._a`
2368 # The assignment of an attribute. eg `x._a=y`
2369 class AAttrAssignExpr
2371 super AAssignFormExpr
2374 # Whatever looks-like a call with a standard method and any number of arguments.
2375 abstract class ACallFormExpr
2378 # The name of the method
2379 var n_qid
: AQid is writable, noinit
2381 # The arguments of the call
2382 var n_args
: AExprs is writable, noinit
2385 # A complex setter call (standard or brackets)
2386 abstract class ASendReassignFormExpr
2388 super AReassignFormExpr
2391 # A complex attribute assignment. eg `x._a+=y`
2392 class AAttrReassignExpr
2394 super AReassignFormExpr
2397 # A call with a standard method-name and any number of arguments. eg `x.m(y)`. OR just a simple id
2398 # Note: because the parser cannot distinguish a variable read with a method call with an implicit receiver and no arguments, it always returns a `ACallExpr`.
2399 # Semantic analysis have to transform them to instance of `AVarExpr`.
2404 # A setter call with a standard method-name and any number of arguments. eg `x.m(y)=z`. OR just a simple assignment.
2405 # Note: because the parser cannot distinguish a variable write with a setter call with an implicit receiver and no arguments, it always returns a `ACallAssignExpr`.
2406 # Semantic analysis have to transform them to instance of `AVarAssignExpr`.
2407 class ACallAssignExpr
2409 super AAssignFormExpr
2412 # A complex setter call with a standard method-name and any number of arguments. eg `x.m(y)+=z`. OR just a simple complex assignment.
2413 # Note: because the parser cannot distinguish a variable write with a complex setter call with an implicit receiver and no arguments, it always returns a `ACallReassignExpr`.
2414 # Semantic analysis have to transform them to instance of `AVarReassignExpr`.
2415 class ACallReassignExpr
2417 super ASendReassignFormExpr
2420 # A call to `super`. OR a call of a super-constructor
2424 # The qualifier part before the super (currenlty unused)
2425 var n_qualified
: nullable AQualified = null is writable
2427 # The `super` keyword
2428 var n_kwsuper
: TKwsuper is writable, noinit
2430 # The arguments of the super
2431 var n_args
: AExprs is writable, noinit
2434 # A call to the `init` constructor.
2435 # Note: because `init` is a keyword and not a `TId`, the explicit call to init cannot be a `ACallFormExpr`.
2439 # The `init` keyword
2440 var n_kwinit
: TKwinit is writable, noinit
2442 # The arguments of the init
2443 var n_args
: AExprs is writable, noinit
2446 # Whatever looks-like a call of the brackets `[]` operator.
2447 abstract class ABraFormExpr
2450 # The arguments inside the brackets
2451 var n_args
: AExprs is writable, noinit
2454 # A call of the brackets operator. eg `x[y,z]`
2459 # A setter call of the bracket operator. eg `x[y,z]=t`
2460 class ABraAssignExpr
2462 super AAssignFormExpr
2465 # Whatever is an access to a local variable
2466 abstract class AVarFormExpr
2469 # The name of the attribute
2470 var n_id
: TId is writable, noinit
2473 # A complex setter call of the bracket operator. eg `x[y,z]+=t`
2474 class ABraReassignExpr
2476 super ASendReassignFormExpr
2479 # A local variable read access.
2480 # The parser cannot instantiate them, see `ACallExpr`.
2485 # A local variable simple assignment access
2486 # The parser cannot instantiate them, see `ACallAssignExpr`.
2487 class AVarAssignExpr
2489 super AAssignFormExpr
2492 # A local variable complex assignment access
2493 # The parser cannot instantiate them, see `ACallReassignExpr`.
2494 class AVarReassignExpr
2496 super AReassignFormExpr
2499 # A literal range, open or closed
2500 abstract class ARangeExpr
2503 # The left (lower) element of the range
2504 var n_expr
: AExpr is writable, noinit
2507 var n_dotdot
: TDotdot is writable, noinit
2509 # The right (upper) element of the range
2510 var n_expr2
: AExpr is writable, noinit
2513 # A closed literal range. eg `[x..y]`
2517 # The opening bracket `[`
2518 var n_obra
: TObra is writable, noinit
2520 # The closing bracket `]`
2521 var n_cbra
: TCbra is writable, noinit
2524 # An open literal range. eg `[x..y[`
2528 # The opening bracket `[`
2529 var n_obra
: TObra is writable, noinit
2531 # The closing bracket `[` (because open range)
2532 var n_cbra
: TObra is writable, noinit
2535 # A literal array. eg. `[x,y,z]`
2539 # The opening bracket `[`
2540 var n_obra
: TObra is writable, noinit
2542 # The elements of the array
2543 var n_exprs
= new ANodes[AExpr](self)
2545 # The type of the element of the array (if any)
2546 var n_type
: nullable AType = null is writable
2548 # The closing bracket `]`
2549 var n_cbra
: TCbra is writable, noinit
2556 # The `self` keyword
2557 var n_kwself
: nullable TKwself = null is writable
2560 # When there is no explicit receiver, `self` is implicit
2561 class AImplicitSelfExpr
2565 # A `true` boolean literal constant
2569 # The `true` keyword
2570 var n_kwtrue
: TKwtrue is writable, noinit
2573 # A `false` boolean literal constant
2577 # The `false` keyword
2578 var n_kwfalse
: TKwfalse is writable, noinit
2581 # A `null` literal constant
2585 # The `null` keyword
2586 var n_kwnull
: TKwnull is writable, noinit
2589 # An integer literal
2594 var n_integer
: TInteger is writable, noinit
2602 var n_float
: TFloat is writable, noinit
2605 # A character literal
2609 # The character token
2610 var n_char
: TChar is writable, noinit
2614 abstract class AStringFormExpr
2618 var n_string
: Token is writable, noinit
2621 # A simple string. eg. `"abc"`
2623 super AStringFormExpr
2626 # The start of a superstring. eg `"abc{`
2627 class AStartStringExpr
2628 super AStringFormExpr
2631 # The middle of a superstring. eg `}abc{`
2632 class AMidStringExpr
2633 super AStringFormExpr
2636 # The end of a superstrng. eg `}abc"`
2637 class AEndStringExpr
2638 super AStringFormExpr
2641 # A superstring literal. eg `"a{x}b{y}c"`
2642 # Each part is modeled a sequence of expression. eg. `["a{, x, }b{, y, }c"]`
2643 class ASuperstringExpr
2646 # The list of the expressions of the superstring
2647 var n_exprs
= new ANodes[AExpr](self)
2650 # A simple parenthesis. eg `(x)`
2654 # The opening parenthesis
2655 var n_opar
: TOpar is writable, noinit
2657 # The inner expression
2658 var n_expr
: AExpr is writable, noinit
2660 # The closing parenthesis
2661 var n_cpar
: TCpar is writable, noinit
2664 # A cast, against a type or `not null`
2668 # The expression to cast
2669 var n_expr
: AExpr is writable, noinit
2672 var n_kwas
: TKwas is writable, noinit
2674 # The opening parenthesis
2675 var n_opar
: nullable TOpar = null is writable
2677 # The closing parenthesis
2678 var n_cpar
: nullable TCpar = null is writable
2681 # A type cast. eg `x.as(T)`
2685 # The target type to cast to
2686 var n_type
: AType is writable, noinit
2689 # A as-not-null cast. eg `x.as(not null)`
2690 class AAsNotnullExpr
2694 var n_kwnot
: TKwnot is writable, noinit
2696 # The `null` keyword
2697 var n_kwnull
: TKwnull is writable, noinit
2700 # A is-set check of old-style attributes. eg `isset x._a`
2701 class AIssetAttrExpr
2704 # The `isset` keyword
2705 var n_kwisset
: TKwisset is writable, noinit
2708 # An ellipsis notation used to pass an expression as it, in a vararg parameter
2712 # The passed expression
2713 var n_expr
: AExpr is writable, noinit
2716 var n_dotdotdot
: TDotdotdot is writable, noinit
2719 # An named notation used to pass an expression by name in a parameter
2723 # The name of the argument
2724 var n_id
: TId is writable, noinit
2727 var n_assign
: TAssign is writable, noinit
2729 # The passed expression
2730 var n_expr
: AExpr is writable, noinit
2733 # A list of expression separated with commas (arguments for instance)
2737 # The list of expressions
2738 var n_exprs
= new ANodes[AExpr](self)
2741 # A special expression that encapsulates a static type
2742 # Can only be found in special construction like arguments of annotations.
2746 # The encapsulated type
2747 var n_type
: AType is writable, noinit
2750 # A special expression that encapsulates a method identifier
2751 # Can only be found in special construction like arguments of annotations.
2756 var n_expr
: AExpr is writable, noinit
2758 # The encapsulated method identifier
2759 var n_id
: AMethid is writable, noinit
2762 # A special expression that encapsulate an annotation
2763 # Can only be found in special construction like arguments of annotations.
2765 # The encapsulated annotations are in `n_annotations`
2770 # A special expression to debug types
2771 class ADebugTypeExpr
2774 # The `debug` keyword
2775 var n_kwdebug
: TKwdebug is writable, noinit
2777 # The `type` keyword
2778 var n_kwtype
: TKwtype is writable, noinit
2780 # The expression to check
2781 var n_expr
: AExpr is writable, noinit
2784 var n_type
: AType is writable, noinit
2787 # A list of expression separated with commas (arguments for instance)
2788 abstract class AExprs
2791 # The list of expressions
2792 var n_exprs
= new ANodes[AExpr](self)
2795 # A simple list of expressions
2800 # A list of expressions enclosed in parentheses
2804 # The opening parenthesis
2805 var n_opar
: TOpar is writable, noinit
2807 # The closing parenthesis
2808 var n_cpar
: TCpar is writable, noinit
2811 # A list of expressions enclosed in brackets
2815 # The opening bracket
2816 var n_obra
: TObra is writable, noinit
2818 # The closing bracket
2819 var n_cbra
: TCbra is writable, noinit
2822 # A complex assignment operator. (`+=` and `-=`)
2823 abstract class AAssignOp
2826 # The combined assignment operator
2827 var n_op
: Token is writable, noinit
2829 # The name of the operator without the `=` (eg '+')
2830 fun operator
: String is abstract
2833 # A `+=` assignment operation
2837 redef fun operator
do return "+"
2840 # A `-=` assignment operation
2841 class AMinusAssignOp
2844 redef fun operator
do return "-"
2847 # A `*=` assignment operation
2851 redef fun operator
do return "*"
2854 # A `/=` assignment operation
2855 class ASlashAssignOp
2858 redef fun operator
do return "/"
2861 # A `%=` assignment operation
2862 class APercentAssignOp
2865 redef fun operator
do return "%"
2868 # A `**=` assignment operation
2869 class AStarstarAssignOp
2872 redef fun operator
do return "**"
2875 # A `|=` assignment operation
2879 redef fun operator
do return "|"
2882 # A `^=` assignment operation
2883 class ACaretAssignOp
2886 redef fun operator
do return "^"
2889 # A `&=` assignment operation
2893 redef fun operator
do return "&"
2896 # A `<<=` assignment operation
2900 redef fun operator
do return "<<"
2903 # A `>>=` assignment operation
2907 redef fun operator
do return ">>"
2910 # A possibly fully-qualified module identifier
2914 # The starting quad (`::`)
2915 var n_quad
: nullable TQuad = null is writable
2917 # The list of quad-separated package/group identifiers
2918 var n_path
= new ANodes[TId](self)
2920 # The final module identifier
2921 var n_id
: TId is writable, noinit
2924 # A language declaration for an extern block
2929 var n_kwin
: TKwin is writable, noinit
2932 var n_string
: TString is writable, noinit
2935 # An full extern block
2936 class AExternCodeBlock
2939 # The language declration
2940 var n_in_language
: nullable AInLanguage = null is writable
2942 # The block of extern code
2943 var n_extern_code_segment
: TExternCodeSegment is writable, noinit
2946 # A possible full method qualifier.
2950 # The starting quad (`::`)
2951 var n_quad
: nullable TQuad = null is writable
2953 # The list of quad-separated package/group/module identifiers
2954 var n_id
= new ANodes[TId](self)
2956 # A class identifier
2957 var n_classid
: nullable TClassid = null is writable
2960 # A documentation of a definition
2961 # It contains the block of comments just above the declaration
2965 # A list of lines of comment
2966 var n_comment
= new ANodes[TComment](self)
2969 # A group of annotation on a node
2971 # This same class is used for the 3 kind of annotations:
2973 # * *is* annotations. eg `module foo is bar`.
2974 # * *at* annotations. eg `foo@bar` or `foo@(bar,baz)`.
2975 # * *class* annotations, defined in classes.
2979 # The `is` keyword, for *is* annotations
2980 var n_kwis
: nullable TKwis = null is writable
2982 # The `@` symbol, for *at* annotations
2983 var n_at
: nullable TAt = null is writable
2985 # The opening parenthesis in *at* annotations
2986 var n_opar
: nullable TOpar = null is writable
2988 # The list of annotations
2989 var n_items
= new ANodes[AAnnotation](self)
2991 # The closing parenthesis in *at* annotations
2992 var n_cpar
: nullable TCpar = null is writable
2994 # The `end` keyword, for *is* annotations
2995 var n_kwend
: nullable TKwend = null is writable
2998 # A single annotation
3002 # The name of the annotation
3003 var n_atid
: AAtid is writable, noinit
3005 # The opening parenthesis of the arguments
3006 var n_opar
: nullable TOpar = null is writable
3008 # The list of arguments
3009 var n_args
= new ANodes[AExpr](self)
3011 # The closing parenthesis
3012 var n_cpar
: nullable TCpar = null is writable
3014 # The name of the annotation
3017 return n_atid
.n_id
.text
3021 # An annotation name
3022 abstract class AAtid
3025 # The identifier of the annotation.
3026 # Can be a TId of a keyword
3027 var n_id
: Token is writable, noinit
3030 # An annotation name based on an identifier
3035 # An annotation name based on the keyword `extern`
3040 # An annotation name based on the keyword `import`
3045 # An annotation name based on the keyword `abstract`
3046 class AKwabstractAtid
3050 # The root of the AST
3055 var n_base
: nullable AModule is writable
3057 # The end of file (or error) token
3058 var n_eof
: EOF is writable