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1371 lines (1255 loc) · 71.9 KB
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# Copyright (c) 2021, 2025, Oracle and/or its affiliates.
# Copyright (C) 1996-2021 Python Software Foundation
#
# Licensed under the PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
"""This is heavily based on the C generator, and we try to keep it as similar as
possible to make updates and maintenance easy. Where we deviate in non obvious
ways, we add comments."""
import ast
import os
import re
import datetime
from collections import Counter
from dataclasses import dataclass
from enum import Enum
from typing import Any, Dict, IO, Optional, List, Text, Tuple, Set
from pegen import grammar
from pegen.grammar import (
Alt,
Cut,
Forced,
Gather,
GrammarVisitor,
Group,
Lookahead,
NamedItem,
NameLeaf,
NegativeLookahead,
Opt,
PositiveLookahead,
Repeat0,
Repeat1,
Rhs,
Rule,
StringLeaf,
)
from pegen.parser_generator import ParserGenerator
class NodeTypes(Enum):
NAME_TOKEN = 0
NUMBER_TOKEN = 1
STRING_TOKEN = 2
GENERIC_TOKEN = 3
KEYWORD = 4
SOFT_KEYWORD = 5
CUT_OPERATOR = 6
BASE_NODETYPES = {
"NAME": (NodeTypes.NAME_TOKEN, "expr_ty"),
"NUMBER": (NodeTypes.NUMBER_TOKEN, "expr_ty"),
"STRING": (NodeTypes.STRING_TOKEN, "Token*"),
"SOFT_KEYWORD": (NodeTypes.SOFT_KEYWORD, "expr_ty"),
}
@dataclass
class FunctionCall:
function: str
arguments: Optional[List[Any]] = None
assigned_variable: Optional[str] = None
assigned_variable_type: Optional[str] = None
return_type: Optional[str] = None
nodetype: Optional[NodeTypes] = None
force_true: bool = False
comment: Optional[str] = None
def __str__(self) -> str:
parts = []
parts.append(self.function)
if self.arguments is not None:
parts.append(f"({', '.join(map(str, self.arguments))})")
ft_part_start = ""
try:
int(self.function)
ft_part_end = ") != 0"
except:
ft_part_end = ") != null"
if self.force_true:
ft_part_start= "("
ft_part_end = f"{ft_part_end} || true)"
if self.assigned_variable:
if self.assigned_variable_type:
var_type = _check_type(self, self.assigned_variable_type)
parts = [ft_part_start, "(", self.assigned_variable, " = ", '(', var_type, ')', *parts, ft_part_end]
else:
parts = [ft_part_start, "(", self.assigned_variable, " = ", *parts, ft_part_end]
if self.comment:
parts.append(f" // {self.comment}")
return "".join(parts)
TYPE_MAPPINGS = {
"AugOperator*": "OperatorTy",
"CmpopExprPair*": "CmpopExprPair",
"CmpopExprPair**": "CmpopExprPair[]",
"KeyPatternPair*": "KeyPatternPair",
"KeyPatternPair**": "KeyPatternPair[]",
"KeyValuePair*": "KeyValuePair",
"KeyValuePair**": "KeyValuePair[]",
"KeywordOrStarred*": "KeywordOrStarred",
"KeywordOrStarred**": "KeywordOrStarred[]",
"NameDefaultPair*": "NameDefaultPair",
"NameDefaultPair**": "NameDefaultPair[]",
"SlashWithDefault*": "SlashWithDefault",
"StarEtc*": "StarEtc",
"Token*": "Token",
"Token**": "Token[]",
"alias_ty": "AliasTy",
"alias_ty*": "AliasTy[]",
"alias_ty**": "AliasTy[]",
"arg_ty": "ArgTy",
"arg_ty*": "ArgTy[]",
"arg_ty**": "ArgTy[]",
"arguments_ty": "ArgumentsTy",
"asdl_alias_seq*": "AliasTy[]",
"asdl_arg_seq*": "ArgTy[]",
"asdl_comprehension_seq*": "ComprehensionTy[]",
"asdl_excepthandler_seq*": "ExceptHandlerTy[]",
"asdl_expr_seq*": "ExprTy[]",
"asdl_expr_seq**": "ExprTy[]",
"asdl_keyword_seq*": "KeywordTy[]",
"asdl_match_case_seq*": "MatchCaseTy[]",
"asdl_stmt_seq*": "StmtTy[]",
"asdl_stmt_seq**": "StmtTy[]",
"asdl_withitem_seq*": "WithItemTy[]",
"asdl_pattern_seq*": "PatternTy[]",
"comprehension_ty": "ComprehensionTy",
"comprehension_ty*": "ComprehensionTy[]",
"excepthandler_ty": "ExceptHandlerTy",
"excepthandler_ty*": "ExceptHandlerTy[]",
"expr_ty": "ExprTy",
"expr_ty*": "ExprTy[]",
"expr_ty**": "ExprTy[]",
"keyword_ty": "KeywordTy",
"keyword_ty*": "KeywordTy[]",
"keyword_ty**": "KeywordTy[]",
"match_case_ty": "MatchCaseTy",
"match_case_ty*": "MatchCaseTy[]",
"mod_ty": "ModTy",
"pattern_ty": "PatternTy",
"pattern_ty*": "PatternTy[]",
"pattern_ty**": "PatternTy[]",
"stmt_ty": "StmtTy",
"stmt_ty*": "StmtTy[]",
"stmt_ty**": "StmtTy[]",
"withitem_ty": "WithItemTy",
"withitem_ty*": "WithItemTy[]",
"withitem_ty**": "WithItemTy[]",
"type_param_ty": "TypeParamTy",
"type_param_ty*": "TypeParamTy[]",
"type_param_ty**": "TypeParamTy[]",
"asdl_type_param_seq*": "TypeParamTy[]",
"asdl_type_param_seq**": "TypeParamTy[]",
"ResultTokenWithMetadata*": "ResultTokenWithMetadata",
# Java return types here
"boolean": "boolean",
"int": "int",
"Object": "Object",
"Object*": "Object[]",
"Object**": "Object[]",
}
# Shortcuts in java actions
SHORTCUTS = {
"$RANGE": "startToken.sourceRange.withEnd(endToken.sourceRange)",
"$LOC": "startToken.sourceRange",
}
# Maps c_action to (n, java_action), where:
# - c_action is space-separated list of tokens from original python.gram, as returned by Alt.action
# - n is the expected number of occurrences in the grammar, which is used to detect obsolete mappings or
# existing mappings used in new places
# - java_action is a template for the Java action in which the shortcuts described above are expanded before
# the action is written to Parser.java
# If no (exact) match is found in ACTION_MAPPINGS, we try regular expressions in ACTION_MAPPINGS_RE below.
ACTION_MAPPINGS = {
'( asdl_alias_seq* ) _PyPegen_singleton_seq ( p , CHECK ( alias_ty , _PyPegen_alias_for_star ( p , EXTRA ) ) )': (1, 'new AliasTy [] {factory.createAlias("*", null, $RANGE)}'),
'( asdl_expr_seq* ) _PyPegen_seq_append_to_end ( p , CHECK ( asdl_seq* , _PyPegen_seq_append_to_end ( p , a , b ) ) , c )': (1, 'this.appendToEnd(this.appendToEnd(a,b),c)'),
'( asdl_expr_seq* ) _PyPegen_seq_append_to_end ( p , CHECK ( asdl_seq* , _PyPegen_singleton_seq ( p , a ) ) , b )': (1, 'this.appendToEnd(new ExprTy[] {a},b)'),
'( asdl_expr_seq* ) _PyPegen_seq_append_to_end ( p , a , b )': (2, 'this.appendToEnd(a,b)'),
'( asdl_expr_seq* ) _PyPegen_seq_insert_in_front ( p , a , b )': (1, 'this.insertInFront(a,b)'),
'( asdl_expr_seq* ) _PyPegen_singleton_seq ( p , a )': (3, 'new ExprTy[] {a}'),
'( asdl_stmt_seq* ) _PyPegen_seq_flatten ( p , a )': (1, 'a'),
'( asdl_stmt_seq* ) _PyPegen_singleton_seq ( p , CHECK ( stmt_ty , _PyAST_Pass ( EXTRA ) ) )': (1, 'new StmtTy[] {factory.createPass($RANGE)}'),
'( asdl_stmt_seq* ) _PyPegen_singleton_seq ( p , a )': (3, 'new StmtTy[] {a}'),
'CHECK_VERSION ( AugOperator* , 5 , "The \'@\' operator is" , _PyPegen_augoperator ( p , MatMult ) )': (1, 'checkVersion(5, "The \'@\' operator is", OperatorTy.MatMult)'),
'CHECK_VERSION ( expr_ty , 5 , "Await expressions are" , _PyAST_Await ( a , EXTRA ) )': (1, 'checkVersion(5, "Await expressions are", factory.createAwait(a, $RANGE))'),
'CHECK_VERSION ( expr_ty , 5 , "The \'@\' operator is" , _PyAST_BinOp ( a , MatMult , b , EXTRA ) )': (1, 'checkVersion(5, "The \'@\' operator is", factory.createBinaryOp(OperatorTy.MatMult, a, b, $RANGE))'),
'CHECK_VERSION ( stmt_ty , 5 , "Async functions are" , _PyAST_AsyncFunctionDef ( n -> v . Name . id , ( params ) ? params : CHECK ( arguments_ty , _PyPegen_empty_arguments ( p ) ) , b , NULL , a , NEW_TYPE_COMMENT ( p , tc ) , t , EXTRA ) )': (1, 'checkVersion(5, "Async functions are", factory.createAsyncFunctionDef(((ExprTy.Name) n).id, params == null ? factory.emptyArguments() : params, b, a, newTypeComment((Token) tc), t, $RANGE))'),
'CHECK_VERSION ( stmt_ty , 5 , "Async for loops are" , _PyAST_AsyncFor ( t , ex , b , el , NEW_TYPE_COMMENT ( p , tc ) , EXTRA ) )': (1, 'checkVersion(5, "Async for loops are", factory.createAsyncFor(t, ex, b, el, newTypeComment(tc), $RANGE))'),
'CHECK_VERSION ( stmt_ty , 5 , "Async with statements are" , _PyAST_AsyncWith ( a , b , NULL , EXTRA ) )': (1, 'checkVersion(5, "Async with statements are", factory.createAsyncWith(a, b, null, $RANGE))'),
'CHECK_VERSION ( stmt_ty , 5 , "Async with statements are" , _PyAST_AsyncWith ( a , b , NEW_TYPE_COMMENT ( p , tc ) , EXTRA ) )': (1, 'checkVersion(5, "Async with statements are", factory.createAsyncWith(a, b, newTypeComment(tc), $RANGE))'),
'CHECK_VERSION ( stmt_ty , 6 , "Variable annotation syntax is" , _PyAST_AnnAssign ( CHECK ( expr_ty , _PyPegen_set_expr_context ( p , a , Store ) ) , b , c , 1 , EXTRA ) )': (1, 'checkVersion(6, "Variable annotation syntax is", factory.createAnnAssignment(setExprContext(a, ExprContextTy.Store), b, (ExprTy) c, true, $RANGE))'),
'CHECK_VERSION ( stmt_ty , 6 , "Variable annotations syntax is" , _PyAST_AnnAssign ( a , b , c , 0 , EXTRA ) )': (1, 'checkVersion(6, "Variable annotations syntax is", factory.createAnnAssignment(a, b, (ExprTy) c, false, $RANGE))'),
'CHECK_VERSION ( comprehension_ty , 6 , "Async comprehensions are" , _PyAST_comprehension ( a , b , c , 1 , p -> arena ) )': (1, 'checkVersion(6, "Async comprehensions are", factory.createComprehension(a, b, c, true, $RANGE))'),
'RAISE_ERROR_KNOWN_LOCATION ( p , PyExc_SyntaxError , a -> lineno , a -> end_col_offset - 1 , a -> end_lineno , - 1 , "\':\' expected after dictionary key" )' : (1, 'this.raiseErrorKnownLocation(ParserCallbacks.ErrorType.Syntax, a, "\':\' expected after dictionary key")'),
'RAISE_SYNTAX_ERROR_INVALID_TARGET ( DEL_TARGETS , a )': (1, 'this.raiseSyntaxErrorInvalidTarget(TargetsType.DEL_TARGETS,a)'),
'RAISE_SYNTAX_ERROR_INVALID_TARGET ( FOR_TARGETS , a )': (1, 'this.raiseSyntaxErrorInvalidTarget(TargetsType.FOR_TARGETS,a)'),
'RAISE_SYNTAX_ERROR_INVALID_TARGET ( STAR_TARGETS , a )': (2, 'this.raiseSyntaxErrorInvalidTarget(TargetsType.STAR_TARGETS,a)'),
'RAISE_SYNTAX_ERROR_KNOWN_RANGE ( a , b , "cannot assign to %s" , PyBytes_AS_STRING ( a -> bytes ) )': (1, 'this.raiseSyntaxErrorKnownRange(a, b, "cannot assign to %s", getText(a))'),
'RAISE_SYNTAX_ERROR_KNOWN_RANGE ( a , _PyPegen_get_last_comprehension_item ( PyPegen_last_item ( b , comprehension_ty ) ) , "Generator expression must be parenthesized" )': (2, 'this.raiseSyntaxErrorKnownRange(a, getLastComprehensionItem(lastItem(b)), "Generator expression must be parenthesized")'),
'RAISE_SYNTAX_ERROR_KNOWN_RANGE ( a , PyPegen_last_item ( b , expr_ty ) , "did you forget parentheses around the comprehension target?" )': (1, 'this.raiseSyntaxErrorKnownRange(a, lastItem(b), "did you forget parentheses around the comprehension target?")'),
'_PyAST_Assert ( a , b , EXTRA )': (1, 'factory.createAssert(a, b, $RANGE)'),
'_PyAST_Assign ( a , b , NEW_TYPE_COMMENT ( p , tc ) , EXTRA )': (1, 'factory.createAssignment(a, (ExprTy) b, newTypeComment((Token) tc), $RANGE)'),
'_PyAST_AugAssign ( a , b -> kind , c , EXTRA )': (1, 'factory.createAugAssignment(a, b, (ExprTy) c, $RANGE)'),
'_PyAST_BinOp ( real , Add , imag , EXTRA )': (1, 'factory.createBinaryOp(OperatorTy.Add, real, imag, $RANGE)'),
'_PyAST_BinOp ( real , Sub , imag , EXTRA )': (1, 'factory.createBinaryOp(OperatorTy.Sub, real, imag, $RANGE)'),
'_PyAST_BoolOp ( And , CHECK ( asdl_expr_seq* , _PyPegen_seq_insert_in_front ( p , a , b ) ) , EXTRA )': (1, 'factory.createAnd(this.insertInFront(a, b), $RANGE)'),
'_PyAST_BoolOp ( Or , CHECK ( asdl_expr_seq* , _PyPegen_seq_insert_in_front ( p , a , b ) ) , EXTRA )': (1, 'factory.createOr(this.insertInFront(a, b), $RANGE)'),
'_PyAST_Break ( EXTRA )': (1, 'factory.createBreak($RANGE)'),
'_PyAST_Call ( _PyPegen_dummy_name ( p ) , CHECK_NULL_ALLOWED ( asdl_expr_seq* , _PyPegen_seq_extract_starred_exprs ( p , a ) ) , CHECK_NULL_ALLOWED ( asdl_keyword_seq* , _PyPegen_seq_delete_starred_exprs ( p , a ) ) , EXTRA )': (1, 'factory.createCall(dummyName(), extractStarredExpressions(a), deleteStarredExpressions(a), $RANGE)'),
'_PyAST_Call ( a , ( b ) ? ( ( expr_ty ) b ) -> v . Call . args : NULL , ( b ) ? ( ( expr_ty ) b ) -> v . Call . keywords : NULL , EXTRA )': (2, 'factory.createCall(a, b != null ? ((ExprTy.Call) b).args : EMPTY_EXPR_ARRAY, b != null ? ((ExprTy.Call) b).keywords : EMPTY_KEYWORD_ARRAY, $RANGE)'),
'_PyAST_Call ( a , CHECK ( asdl_expr_seq* , ( asdl_expr_seq* ) _PyPegen_singleton_seq ( p , b ) ) , NULL , EXTRA )': (2, 'factory.createCall(a, new ExprTy[] {b}, EMPTY_KEYWORD_ARRAY, $RANGE)'),
'_PyAST_ClassDef ( a -> v . Name . id , ( b ) ? ( ( expr_ty ) b ) -> v . Call . args : NULL , ( b ) ? ( ( expr_ty ) b ) -> v . Call . keywords : NULL , c , NULL , t , EXTRA )': (1, 'factory.createClassDef(a, b, c, t, $RANGE)'),
'_PyAST_Compare ( a , CHECK ( asdl_int_seq* , _PyPegen_get_cmpops ( p , b ) ) , CHECK ( asdl_expr_seq* , _PyPegen_get_exprs ( p , b ) ) , EXTRA )': (1, 'factory.createComparison(a, b, $RANGE)'),
'_PyAST_Constant ( Py_Ellipsis , NULL , EXTRA )': (1, 'factory.createEllipsis($LOC)'),
'_PyAST_Constant ( Py_False , NULL , EXTRA )': (2, 'factory.createBooleanLiteral(false, $LOC)'),
'_PyAST_Constant ( Py_None , NULL , EXTRA )': (2, 'factory.createNone($LOC)'),
'_PyAST_Constant ( Py_True , NULL , EXTRA )': (2, 'factory.createBooleanLiteral(true, $LOC)'),
'_PyAST_Continue ( EXTRA )': (1, 'factory.createContinue($RANGE)'),
'_PyAST_Delete ( a , EXTRA )': (1, 'factory.createDelete(a, $RANGE)'),
'_PyAST_Dict ( CHECK ( asdl_expr_seq* , _PyPegen_get_keys ( p , a ) ) , CHECK ( asdl_expr_seq* , _PyPegen_get_values ( p , a ) ) , EXTRA )': (1, 'factory.createDict(extractKeys(a), extractValues(a), $RANGE)'),
'_PyAST_DictComp ( a -> key , a -> value , b , EXTRA )': (1, 'factory.createDictComprehension(a, b, $RANGE)'),
'_PyAST_ExceptHandler ( NULL , NULL , b , EXTRA )': (1, 'factory.createExceptHandler(null, null, b, $RANGE)'),
'_PyAST_ExceptHandler ( e , ( t ) ? ( ( expr_ty ) t ) -> v . Name . id : NULL , b , EXTRA )': (2, 'factory.createExceptHandler(e, t != null ? ((ExprTy.Name) t).id : null, b, $RANGE)'),
'_PyAST_Expr ( e , EXTRA )': (1, 'factory.createExpression(e, $RANGE)'),
'_PyAST_Expr ( y , EXTRA )': (1, 'factory.createExpression(y, $RANGE)'),
'_PyAST_Expression ( a , p -> arena )': (1, 'factory.createExpressionModule(a, $RANGE)'),
'_PyAST_For ( t , ex , b , el , NEW_TYPE_COMMENT ( p , tc ) , EXTRA )': (1, 'factory.createFor(t, ex, b, el, newTypeComment(tc), $RANGE)'),
'_PyAST_FunctionDef ( n -> v . Name . id , ( params ) ? params : CHECK ( arguments_ty , _PyPegen_empty_arguments ( p ) ) , b , NULL , a , NEW_TYPE_COMMENT ( p , tc ) , t , EXTRA )': (1, 'factory.createFunctionDef(((ExprTy.Name) n).id, params == null ? factory.emptyArguments() : params, b, (ExprTy) a, newTypeComment((Token) tc), t, $RANGE)'),
'_PyAST_FunctionType ( a , b , p -> arena )': (1, 'factory.createFunctionType(a, b, $RANGE)'),
'_PyAST_GeneratorExp ( a , b , EXTRA )': (1, 'factory.createGenerator(a, b, $RANGE)'),
'_PyAST_Global ( CHECK ( asdl_identifier_seq* , _PyPegen_map_names_to_ids ( p , a ) ) , EXTRA )': (1, 'factory.createGlobal(extractNames(a), $RANGE)'),
'_PyAST_If ( a , b , CHECK ( asdl_stmt_seq* , _PyPegen_singleton_seq ( p , c ) ) , EXTRA )': (2, 'factory.createIf(a, b, new StmtTy[] {c}, $RANGE)'),
'_PyAST_If ( a , b , c , EXTRA )': (2, 'factory.createIf(a, b, c, $RANGE)'),
'_PyAST_IfExp ( b , a , c , EXTRA )': (2, 'factory.createIfExpression(b, a, c, $RANGE)'),
'_PyAST_Import ( a , EXTRA )': (1, 'factory.createImport(a, $RANGE)'),
'_PyAST_ImportFrom ( NULL , b , _PyPegen_seq_count_dots ( a ) , EXTRA )': (1, 'factory.createImportFrom(null, b, countDots(a), $RANGE)'),
'_PyAST_ImportFrom ( b -> v . Name . id , c , _PyPegen_seq_count_dots ( a ) , EXTRA )': (1, 'factory.createImportFrom(((ExprTy.Name) b).id, c, countDots(a), $RANGE)'),
'_PyAST_Interactive ( a , p -> arena )': (1, 'factory.createInteractiveModule(a, $RANGE)'),
'_PyAST_Lambda ( ( a ) ? a : CHECK ( arguments_ty , _PyPegen_empty_arguments ( p ) ) , b , EXTRA )': (1, 'factory.createLambda(a == null ? factory.emptyArguments() : a, b, $RANGE)'),
'_PyAST_ListComp ( a , b , EXTRA )': (1, 'factory.createListComprehension(a, b, $RANGE)'),
'CHECK_VERSION ( expr_ty , 8 , "Assignment expressions are" , _PyAST_NamedExpr ( CHECK ( expr_ty , _PyPegen_set_expr_context ( p , a , Store ) ) , b , EXTRA ) )': (1, 'checkVersion(8, "Assignment expressions are", factory.createNamedExp(this.setExprContext(a, ExprContextTy.Store), b, $RANGE))'),
'_PyAST_Nonlocal ( CHECK ( asdl_identifier_seq* , _PyPegen_map_names_to_ids ( p , a ) ) , EXTRA )': (1, 'factory.createNonLocal(extractNames(a), $RANGE)'),
'_PyAST_Pass ( EXTRA )': (1, 'factory.createPass($RANGE)'),
'_PyAST_Raise ( NULL , NULL , EXTRA )': (1, 'factory.createRaise(null, null, $RANGE)'),
'_PyAST_Raise ( a , b , EXTRA )': (1, 'factory.createRaise(a, b, $RANGE)'),
'_PyAST_Return ( a , EXTRA )': (1, 'factory.createReturn(a, $RANGE)'),
'_PyAST_Set ( a , EXTRA )': (1, 'factory.createSet(a, $RANGE)'),
'_PyAST_SetComp ( a , b , EXTRA )': (1, 'factory.createSetComprehension(a, b, $RANGE)'),
'_PyAST_Slice ( a , b , c , EXTRA )': (1, 'factory.createSlice(a, b, c, $RANGE)'),
'_PyAST_Starred ( CHECK ( expr_ty , _PyPegen_set_expr_context ( p , a , Store ) ) , Store , EXTRA )': (1, 'factory.createStarred(this.setExprContext(a, ExprContextTy.Store), ExprContextTy.Store, $RANGE)'),
'_PyAST_Starred ( a , Load , EXTRA )': (3, 'factory.createStarred(a, ExprContextTy.Load, $RANGE)'),
'_PyAST_Try ( b , NULL , NULL , f , EXTRA )': (1, 'factory.createTry(b, null, null, f, $RANGE)'),
'_PyAST_Try ( b , ex , el , f , EXTRA )': (1, 'factory.createTry(b, ex, el, f, $RANGE)'),
'CHECK_VERSION ( stmt_ty , 11 , "Exception groups are" , _PyAST_TryStar ( b , ex , el , f , EXTRA ) )': (1, 'checkVersion(10, "Pattern matching is", factory.createTryStar(b, ex, el, f, $RANGE))'),
'_PyAST_Tuple ( CHECK ( asdl_expr_seq* , _PyPegen_seq_insert_in_front ( p , a , b ) ) , Load , EXTRA )': (2, 'factory.createTuple(this.insertInFront(a, b), ExprContextTy.Load, $RANGE)'),
'_PyAST_Tuple ( CHECK ( asdl_expr_seq* , _PyPegen_seq_insert_in_front ( p , a , b ) ) , Store , EXTRA )': (1, 'factory.createTuple(this.insertInFront(a,b), ExprContextTy.Store, $RANGE)'),
'_PyAST_Tuple ( CHECK ( asdl_expr_seq* , _PyPegen_singleton_seq ( p , a ) ) , Load , EXTRA )': (2, 'factory.createTuple(new ExprTy[] {a}, ExprContextTy.Load, $RANGE)'),
'_PyAST_While ( a , b , c , EXTRA )': (1, 'factory.createWhile(a, b, c, $RANGE)'),
'_PyAST_With ( a , b , NEW_TYPE_COMMENT ( p , tc ) , EXTRA )': (1, 'factory.createWith(a, b, newTypeComment(tc), $RANGE)'),
'_PyAST_With ( a , b , NULL , EXTRA )': (1, 'factory.createWith(a, b, null, $RANGE)'),
'_PyAST_Yield ( a , EXTRA )': (1, 'factory.createYield(a, false, $RANGE)'),
'_PyAST_YieldFrom ( a , EXTRA )': (1, 'factory.createYield(a, true, $RANGE)'),
'_PyAST_alias ( a -> v . Name . id , ( b ) ? ( ( expr_ty ) b ) -> v . Name . id : NULL , EXTRA )': (2, 'factory.createAlias(((ExprTy.Name) a).id, b == null ? null : ((ExprTy.Name) b).id, $RANGE)'),
'_PyAST_arg ( a -> v . Name . id , NULL , NULL , EXTRA )': (1, 'factory.createArgument(((ExprTy.Name) a).id, null, null, $RANGE)'),
'_PyAST_arg ( a -> v . Name . id , b , NULL , EXTRA )': (2, 'factory.createArgument(((ExprTy.Name) a).id, b, null, $RANGE)'),
'_PyAST_comprehension ( a , b , c , 0 , p -> arena )': (1, 'factory.createComprehension(a, b, c, false, $RANGE)'),
'_PyAST_withitem ( e , NULL , p -> arena )': (1, 'factory.createWithItem(e, null, $RANGE)'),
'_PyAST_withitem ( e , t , p -> arena )': (1, 'factory.createWithItem(e, t, $RANGE)'),
'_PyPegen_add_type_comment_to_arg ( p , a , tc )': (4, 'factory.createArgument(a.arg, a.annotation, newTypeComment(tc), a.getSourceRange())'),
'_PyPegen_arguments_parsing_error ( p , a )': (1, 'raiseArgumentsParsingError(a)'),
'_PyPegen_check_barry_as_flufl ( p , tok ) ? NULL : tok': (1, 'this.checkBarryAsFlufl(tok)? null : tok'),
'_PyPegen_check_legacy_stmt ( p , a ) ? RAISE_SYNTAX_ERROR_KNOWN_RANGE ( a , b , "Missing parentheses in call to \'%U\'. Did you mean %U(...)?" , a -> v . Name . id , a -> v . Name . id ) : NULL': (1, 'checkLegacyStmt(a) ? this.raiseSyntaxErrorKnownRange(a, b, "Missing parentheses in call to \'%s\'. Did you mean %s(...)?", ((ExprTy.Name) a).id, ((ExprTy.Name) a).id) : null'),
'_PyPegen_check_legacy_stmt ( p , a ) ? NULL : p -> tokens [p -> mark - 1] -> level == 0 ? NULL : RAISE_SYNTAX_ERROR_KNOWN_RANGE ( a , b , "invalid syntax. Perhaps you forgot a comma?" )': (1, 'checkLegacyStmt(a) ? null : peekToken(mark() - 1).level == 0 ? null : this.raiseSyntaxErrorKnownRange(a, b, "invalid syntax. Perhaps you forgot a comma?")'),
'_PyPegen_class_def_decorators ( p , a , b )': (1, 'factory.createClassDef(b, a, $RANGE)'),
'_PyPegen_collect_call_seqs ( p , a , b , EXTRA )': (1, 'this.collectCallSequences(a, b, $RANGE)'),
'_PyPegen_function_def_decorators ( p , d , f )': (1, 'factory.createFunctionDefWithDecorators(f,d)'),
'_PyPegen_interactive_exit ( p )': (1, 'interactiveExit()'),
'_PyPegen_join_names_with_dot ( p , a , b )': (1, 'this.joinNamesWithDot(a,b)'),
'_PyPegen_join_sequences ( p , a , b )': (1, 'this.join(a,b)'),
'_PyPegen_key_value_pair ( p , NULL , a )': (1, 'new KeyValuePair(null,a)'),
'_PyPegen_key_value_pair ( p , a , b )': (1, 'new KeyValuePair(a,b)'),
'_PyPegen_keyword_or_starred ( p , CHECK ( keyword_ty , _PyAST_keyword ( NULL , a , EXTRA ) ) , 1 )': (1, 'new KeywordOrStarred(factory.createKeyword(null, a, $RANGE), true)'),
'_PyPegen_keyword_or_starred ( p , CHECK ( keyword_ty , _PyAST_keyword ( a -> v . Name . id , b , EXTRA ) ) , 1 )': (2, 'new KeywordOrStarred(factory.createKeyword(((ExprTy.Name) a).id, b, $RANGE), true)'),
'_PyPegen_keyword_or_starred ( p , a , 0 )': (1, 'new KeywordOrStarred(a,false)'),
'_PyPegen_make_arguments ( p , NULL , NULL , NULL , NULL , a )': (2, 'factory.createArguments(null, null, null, null, a)'),
'_PyPegen_make_arguments ( p , NULL , NULL , NULL , a , b )': (2, 'factory.createArguments(null, null, null, a, b)'),
'_PyPegen_make_arguments ( p , NULL , NULL , a , b , c )': (2, 'factory.createArguments(null, null, a, b, c)'),
'CHECK_VERSION ( arguments_ty , 8 , "Positional-only parameters are" , _PyPegen_make_arguments ( p , NULL , a , NULL , b , c ) )': (2, 'checkVersion(8, "Positional-only parameters are", factory.createArguments(null, a, null, b, c))'),
'CHECK_VERSION ( arguments_ty , 8 , "Positional-only parameters are" , _PyPegen_make_arguments ( p , a , NULL , b , c , d ) )': (2, 'checkVersion(8, "Positional-only parameters are", factory.createArguments(a, null, b, c, d))'),
'_PyPegen_make_module ( p , a )': (1, 'makeModule(a, $RANGE)'),
'_PyPegen_name_default_pair ( p , a , c , NULL )': (4, 'new NameDefaultPair(factory.createArgument(a.arg, a.annotation, null, a.getSourceRange()), c)'),
'_PyPegen_name_default_pair ( p , a , c , tc )': (4, 'new NameDefaultPair(factory.createArgument(a.arg, a.annotation, newTypeComment(tc), a.getSourceRange()), c)'),
'_PyPegen_nonparen_genexp_in_call ( p , a , b )': (1, 'nonparenGenexpInCall(a, b)'),
'_PyPegen_seq_insert_in_front ( p , y , z )': (1, 'this.insertInFront(y,z)'),
'_PyPegen_set_expr_context ( p , a , Del )': (2, 'this.setExprContext(a, ExprContextTy.Del)'),
'_PyPegen_set_expr_context ( p , a , Store )': (3, 'this.setExprContext(a, ExprContextTy.Store)'),
'_PyPegen_singleton_seq ( p , a )': (2, 'new SlashWithDefault[] {a}'),
'_PyPegen_slash_with_default ( p , ( asdl_arg_seq* ) a , b )': (4, 'new SlashWithDefault(a,b)'),
'_PyPegen_star_etc ( p , NULL , NULL , a )': (2, 'new StarEtc(null,null,a)'),
'_PyPegen_star_etc ( p , NULL , b , c )': (2, 'new StarEtc(null,b,c)'),
'_PyPegen_star_etc ( p , a , b , c )': (3, 'new StarEtc(a,b,c)'),
'a': (35, 'a'),
'args': (1, 'args'),
'b': (2, 'b'),
'c': (6, 'c'),
'd': (3, 'd'),
'e': (1, 'e'),
'f': (1, 'f'),
'guard': (1, 'guard'),
'k': (1, 'k'),
't': (1, 't'),
'z': (12, 'z'),
# Pattern matching:
'CHECK_VERSION ( stmt_ty , 10 , "Pattern matching is" , _PyAST_Match ( subject , cases , EXTRA ) )': (1, 'checkVersion(10, "Pattern matching is", factory.createMatch(subject, cases, $RANGE))'),
'CHECK_VERSION ( void* , 10 , "Pattern matching is" , RAISE_SYNTAX_ERROR ( "expected \':\'" ) )': (1, 'checkVersion(10, "Pattern matching is", () -> this.raiseSyntaxError("expected \':\'"))'),
'_PyAST_match_case ( pattern , guard , body , p -> arena )': (1, 'factory.createMatchCase(pattern, guard, body, $RANGE)'),
'_PyAST_Tuple ( CHECK ( asdl_expr_seq* , _PyPegen_seq_insert_in_front ( p , value , values ) ) , Load , EXTRA )': (1, 'factory.createTuple(insertInFront(value, values), ExprContextTy.Load, $RANGE)'),
'asdl_seq_LEN ( patterns ) == 1 ? asdl_seq_GET ( patterns , 0 ) : _PyAST_MatchOr ( patterns , EXTRA )': (1, 'patterns.length == 1 ? patterns[0] : factory.createMatchOr(patterns, $RANGE)'),
'_PyAST_MatchSingleton ( Py_None , EXTRA )': (1, 'factory.createMatchSingleton(ConstantValue.NONE, $RANGE)'),
'_PyAST_MatchSingleton ( Py_True , EXTRA )': (1, 'factory.createMatchSingleton(ConstantValue.TRUE, $RANGE)'),
'_PyAST_MatchSingleton ( Py_False , EXTRA )': (1, 'factory.createMatchSingleton(ConstantValue.FALSE, $RANGE)'),
'_PyAST_MatchAs ( NULL , NULL , EXTRA )': (1, 'factory.createMatchAs(null, null, $RANGE)'),
'_PyAST_MatchAs ( pattern , target -> v . Name . id , EXTRA )': (1, 'factory.createMatchAs(pattern, ((ExprTy.Name) target).id, $RANGE)'),
'_PyAST_MatchAs ( NULL , target -> v . Name . id , EXTRA )': (1, 'factory.createMatchAs(null, ((ExprTy.Name) target).id, $RANGE)'),
'_PyPegen_set_expr_context ( p , name , Store )': (1, 'setExprContext(name, ExprContextTy.Store)'),
'_PyAST_MatchValue ( value , EXTRA )': (3, 'factory.createMatchValue(value, $RANGE)'),
'_PyAST_MatchValue ( attr , EXTRA )': (1, 'factory.createMatchValue(attr, $RANGE)'),
'_PyPegen_ensure_real ( p , real )': (1, 'ensureReal(real)'),
'_PyPegen_ensure_imaginary ( p , imag )': (1, 'ensureImaginary(imag)'),
'_PyAST_Attribute ( value , attr -> v . Name . id , Load , EXTRA )': (1, 'factory.createGetAttribute(value, ((ExprTy.Name) attr).id, ExprContextTy.Load, $RANGE)'),
'_PyAST_MatchSequence ( patterns , EXTRA )': (3, 'factory.createMatchSequence(patterns, $RANGE)'),
'_PyAST_MatchStar ( target -> v . Name . id , EXTRA )': (1, 'factory.createMatchStar(((ExprTy.Name) target).id, $RANGE)'),
'_PyAST_MatchStar ( NULL , EXTRA )': (1, 'factory.createMatchStar(null, $RANGE)'),
'_PyPegen_seq_insert_in_front ( p , pattern , patterns )': (1, 'insertInFront(pattern, patterns)'),
'patterns': (1, 'patterns'),
'pattern': (1, 'pattern'),
'_PyAST_MatchMapping ( NULL , NULL , NULL , EXTRA )': (1, 'factory.createMatchMapping(null, null, null, $RANGE)'),
'_PyAST_MatchMapping ( NULL , NULL , rest -> v . Name . id , EXTRA )': (1, 'factory.createMatchMapping(null, null, ((ExprTy.Name) rest).id, $RANGE)'),
'_PyAST_MatchMapping ( CHECK ( asdl_expr_seq* , _PyPegen_get_pattern_keys ( p , items ) ) , CHECK ( asdl_pattern_seq* , _PyPegen_get_patterns ( p , items ) ) , rest -> v . Name . id , EXTRA )': (1, 'factory.createMatchMapping(extractKeys(items), extractPatterns(items), ((ExprTy.Name) rest).id, $RANGE)'),
'_PyAST_MatchMapping ( CHECK ( asdl_expr_seq* , _PyPegen_get_pattern_keys ( p , items ) ) , CHECK ( asdl_pattern_seq* , _PyPegen_get_patterns ( p , items ) ) , NULL , EXTRA )': (1, 'factory.createMatchMapping(extractKeys(items), extractPatterns(items), null, $RANGE)'),
'_PyPegen_key_pattern_pair ( p , key , pattern )': (1, 'new KeyPatternPair(key, pattern)'),
'target': (1, 'target'),
'_PyAST_MatchClass ( cls , NULL , NULL , NULL , EXTRA )': (1, 'factory.createMatchClass(cls, null, null, null, $RANGE)'),
'_PyAST_MatchClass ( cls , patterns , NULL , NULL , EXTRA )': (1, 'factory.createMatchClass(cls, patterns, null, null, $RANGE)'),
'_PyAST_MatchClass ( cls , NULL , CHECK ( asdl_identifier_seq* , _PyPegen_map_names_to_ids ( p , CHECK ( asdl_expr_seq* , _PyPegen_get_pattern_keys ( p , keywords ) ) ) ) , CHECK ( asdl_pattern_seq* , _PyPegen_get_patterns ( p , keywords ) ) , EXTRA )': (1, 'factory.createMatchClass(cls, null, extractNames(extractKeys(keywords)), extractPatterns(keywords), $RANGE)'),
'_PyAST_MatchClass ( cls , patterns , CHECK ( asdl_identifier_seq* , _PyPegen_map_names_to_ids ( p , CHECK ( asdl_expr_seq* , _PyPegen_get_pattern_keys ( p , keywords ) ) ) ) , CHECK ( asdl_pattern_seq* , _PyPegen_get_patterns ( p , keywords ) ) , EXTRA )': (1, 'factory.createMatchClass(cls, patterns, extractNames(extractKeys(keywords)), extractPatterns(keywords), $RANGE)'),
'_PyPegen_key_pattern_pair ( p , arg , value )': (1, 'new KeyPatternPair(arg, value)'),
'RAISE_SYNTAX_ERROR_KNOWN_RANGE ( PyPegen_first_item ( a , pattern_ty ) , PyPegen_last_item ( a , pattern_ty ) , "positional patterns follow keyword patterns" )': (1, 'raiseSyntaxErrorKnownRange(a[0], a[a.length - 1], "positional patterns follow keyword patterns")'),
# Type alias/type params
'CHECK_VERSION ( stmt_ty , 12 , "Type statement is" , _PyAST_TypeAlias ( CHECK ( expr_ty , _PyPegen_set_expr_context ( p , n , Store ) ) , t , b , EXTRA ) )': (1, 'checkVersion(12, "Type statement is", factory.createTypeAlias(setExprContext(n, ExprContextTy.Store), t, b, $RANGE))'),
'CHECK_VERSION ( asdl_type_param_seq* , 12 , "Type parameter lists are" , t )': (1, 'checkVersion(12, "Type parameter lists are", t)'),
'_PyAST_TypeVar ( a -> v . Name . id , b , EXTRA )': (1, 'factory.createTypeVar(((ExprTy.Name) a).id, b, $RANGE)'),
'RAISE_SYNTAX_ERROR_STARTING_FROM ( colon , e -> kind == Tuple_kind ? "cannot use constraints with TypeVarTuple" : "cannot use bound with TypeVarTuple" )': (1, 'this.raiseSyntaxErrorStartingFrom(colon, e instanceof ExprTy.Tuple ? "cannot use constraints with TypeVarTuple" : "cannot use bound with TypeVarTuple")'),
'_PyAST_TypeVarTuple ( a -> v . Name . id , EXTRA )': (1, 'factory.createTypeVarTuple(((ExprTy.Name) a).id, $RANGE)'),
'RAISE_SYNTAX_ERROR_STARTING_FROM ( colon , e -> kind == Tuple_kind ? "cannot use constraints with ParamSpec" : "cannot use bound with ParamSpec" )': (1, 'this.raiseSyntaxErrorStartingFrom(colon, e instanceof ExprTy.Tuple ? "cannot use constraints with ParamSpec" : "cannot use bound with ParamSpec")'),
'_PyAST_ParamSpec ( a -> v . Name . id , EXTRA )': (1, 'factory.createParamSpec(((ExprTy.Name) a).id, $RANGE)'),
# f-strings
'_PyPegen_constant_from_token ( p , t )': (1, 'constantFromToken(t)'),
'_PyPegen_constant_from_string ( p , s )': (1, 'constantFromString(s)'),
'_PyPegen_decoded_constant_from_token ( p , t )': (1, 'decodedConstantFromToken(t)'),
'_PyPegen_formatted_value ( p , a , debug_expr , conversion , format , rbrace , EXTRA )': (1, 'formattedValue(a, debug_expr, conversion, format, rbrace, $RANGE)'),
'_PyPegen_check_fstring_conversion ( p , conv_token , conv )': (1, 'checkFstringConversion(conv_token, conv)'),
'_PyPegen_setup_full_format_spec ( p , colon , ( asdl_expr_seq* ) spec , EXTRA )': (1, 'setupFullFormatSpec(colon, spec, $RANGE)'),
'_PyPegen_joined_str ( p , a , ( asdl_expr_seq* ) b , c )': (1, 'joinedStr(a, b, c)'),
'_PyPegen_concatenate_strings ( p , a , EXTRA )': (1, 'this.concatenateStrings(a, $RANGE)'),
}
# Maps pattern to (n, replacement), where:
# - pattern is a regular expression applied to the space-separated list of tokens from original python.gram, as
# returned by Alt.action. The pattern must match the full C action.
# - n is the expected number of occurrences in the grammar, which is used to detect obsolete mappings or
# existing mappings used in new places
# - replacement is a template for the Java action in which the backreferences such as `\1` are replaced with
# the given matched group and then shortcuts described above are expanded before the action is written
# to Parser.java
ACTION_MAPPINGS_RE = {
r'_PyAST_Attribute \( a , b -> v \. Name \. id , (\w+) , EXTRA \)': (5, 'factory.createGetAttribute(a, ((ExprTy.Name) b).id, ExprContextTy.\\1, $RANGE)'),
r'_PyAST_BinOp \( a , (\w+) , b , EXTRA \)': (12, 'factory.createBinaryOp(OperatorTy.\\1, a, b, $RANGE)'),
r'_PyAST_List \( a , (\w+) , EXTRA \)': (3, 'factory.createList(a, ExprContextTy.\\1, $RANGE)'),
r'_PyAST_Subscript \( a , b , (\w+) , EXTRA \)': (5, 'factory.createSubscript(a, b, ExprContextTy.\\1, $RANGE)'),
r'_PyAST_Tuple \( a , (\w+) , EXTRA \)': (4, 'factory.createTuple(a, ExprContextTy.\\1, $RANGE)'),
r'_PyAST_UnaryOp \( (\w+) , (\w+) , EXTRA \)': (6, 'factory.createUnaryOp(UnaryOpTy.\\1, \\2, $RANGE)'),
r'_PyPegen_augoperator \( p , (\w+) \)': (12, 'OperatorTy.\\1'),
r'_PyPegen_cmpop_expr_pair \( p , (\w+) , a \)': (10, 'new CmpopExprPair(CmpOpTy.\\1, a)'),
r'RAISE_SYNTAX_ERROR \( "(.+)" \)': (17, 'this.raiseSyntaxError("\\1")'),
r'RAISE_SYNTAX_ERROR_KNOWN_LOCATION \( (\w+) , "(.+)" \)': (38, 'this.raiseSyntaxErrorKnownLocation(\\1, "\\2")'),
r'RAISE_SYNTAX_ERROR_KNOWN_RANGE \( (\w+) , (\w+) , "(.+)" \)': (13, 'this.raiseSyntaxErrorKnownRange(\\1, \\2, "\\3")'),
r'RAISE_SYNTAX_ERROR_KNOWN_LOCATION \( (\w+) , "(.+)" , _PyPegen_get_expr_name \( \1 \) \)': (4, 'this.raiseSyntaxErrorKnownLocation(\\1, "\\2", getExprName(\\1))'),
r'RAISE_SYNTAX_ERROR_STARTING_FROM \( (\w+) , "(.+)" \)': (5, 'this.raiseSyntaxErrorStartingFrom(\\1, "\\2")'),
r'RAISE_INDENTATION_ERROR \( "(.+)" \)': (1, 'this.raiseIndentationError("\\1")'),
r'RAISE_INDENTATION_ERROR \( "(.+)" , (\w+) -> lineno \)': (16, 'this.raiseIndentationError("\\1", \\2.getSourceRange().startLine)'),
'RAISE_SYNTAX_ERROR_ON_NEXT_TOKEN \( "(.+)" \)': (3, 'raiseSyntaxErrorOnNextToken("\\1")'),
r'PyErr_Occurred \( \) \? NULL : RAISE_SYNTAX_ERROR_ON_NEXT_TOKEN \( "(.+)" \)': (5, 'raiseSyntaxErrorOnNextToken("\\1")'),
}
LICENSE = '''/*
* Copyright (c) 2021, {year}, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
* copyright rights in the Software, and any and all patent rights owned or
* freely licensable by each licensor hereunder covering either (i) the
* unmodified Software as contributed to or provided by such licensor, or (ii)
* the Larger Works (as defined below), to deal in both
*
* (a) the Software, and
*
* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
* is contributed by such licensors),
*
* without restriction, including without limitation the rights to copy, create
* derivative works of, display, perform, and distribute the Software and make,
* use, sell, offer for sale, import, export, have made, and have sold the
* Software and the Larger Work(s), and to sublicense the foregoing rights on
* either these or other terms.
*
* This license is subject to the following condition:
*
* The above copyright notice and either this complete permission notice or at a
* minimum a reference to the UPL must be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
'''.format(year=datetime.datetime.now().strftime('%Y'))
IMPORTS = '''
import com.oracle.graal.python.pegparser.sst.*;
import com.oracle.graal.python.pegparser.tokenizer.SourceRange;
import com.oracle.graal.python.pegparser.tokenizer.Token;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EnumSet;
import java.util.List;
'''
TRAILER = '''
@Override
protected SSTNode runParser(InputType inputType) {
SSTNode result = null;
switch (inputType) {
case FILE:
return file_rule();
case SINGLE:
return interactive_rule();
case EVAL:
return eval_rule();
case FUNCTION_TYPE:
return func_type_rule();
}
return result;
}
'''
def _check_type(self, ttype: str) -> str:
self._type_conversions = getattr(self, "_type_conversions", {})
mappedType = TYPE_MAPPINGS.get(ttype, None)
if ttype and not mappedType:
self._type_conversions.setdefault(f"// TODO replacing {ttype} --> Object")
mappedType = "Object"
return mappedType
# This class is a Java specific hack to get more specific types
class TypingVisitor(GrammarVisitor):
def __init__(self, gen):
self.gen = gen
def visit_Rule(self, node):
type = getattr(node, "type", None)
if not type or type == "asdl_seq*": # heuristic: try to be more precise
node.type = self.visit(node.rhs)
if node.is_loop() or node.is_gather():
node.type += "*"
return node.type
def visit_NameLeaf(self, node):
return self.gen.callmakervisitor.visit_NameLeaf(node).return_type
def visit_StringLeaf(self, node):
return self.gen.callmakervisitor.visit_StringLeaf(node).return_type
def visit_Rhs(self, node):
types = getattr(node, "types", set())
if not types:
for alt in node.alts:
typ = self.visit(alt)
if typ:
types.add(typ)
node.types = types
if len(types) == 1:
return next(iter(types))
else:
return "Object"
def visit_Alt(self, node):
types = getattr(node, "types", set())
if not types:
for item in node.items:
typ = self.visit(item)
if typ:
types.add(typ)
if len(types) > 1 and node.action:
types.discard("Token*") # heuristic. when tokens are in there, they are usually dropped
if len(types) == 1 and next(iter(types)) == "Token*" and len(node.items) > 1:
types = {'Object'}
if len(types) == 2:
# might be a pair for gathering
typ1, typ2 = sorted(types, key=lambda x: x.count('*'))
if (f"{typ1}*" == typ2 or
typ2.startswith(f"asdl_{typ1.replace('_ty', '')}_seq")):
types = {typ2.replace("**", "*")}
node.types = types
if len(types) == 1:
return next(iter(types))
else:
return "Object"
def visit_NamedItem(self, node):
if not getattr(node, "type", None):
node.type = self.visit(node.item)
return node.type
def visit_Forced(self, node):
if not getattr(node, "type", None):
node.type = self.visit(node.node)
return node.type
def visit_PositiveLookahead(self, node):
pass
def visit_NegativeLookahead(self, node):
pass
def visit_Opt(self, node):
return self.visit(node.node)
def visit_Repeat0(self, node):
if not getattr(node, "type", None):
node_type = self.visit(node.node)
node.type = f"{node_type}*"
return node.type
def visit_Repeat1(self, node):
if not getattr(node, "type", None):
node_type = self.visit(node.node)
node.type = f"{node_type}*"
return node.type
def visit_Gather(self, node):
if not getattr(node, "type", None):
node_type = self.visit(node.node)
node.type = f"{node_type}*"
return node.type
def visit_Group(self, node):
return self.visit(node.rhs)
def visit_Cut(self, node):
return None
class JavaCallMakerVisitor(GrammarVisitor):
def __init__(self, parser_generator: ParserGenerator,
exact_tokens: Dict[str, int],
non_exact_tokens: Set[str],
printFnc):
self.gen = parser_generator
self.exact_tokens = exact_tokens
self.non_exact_tokens = non_exact_tokens
self.cache: Dict[Any, FunctionCall] = {}
self.keyword_cache: Dict[str, int] = {}
self.soft_keywords: Set[str] = set()
self.print = printFnc
def keyword_helper(self, keyword: str) -> FunctionCall:
if keyword not in self.keyword_cache:
self.keyword_cache[keyword] = self.gen.keyword_type()
return FunctionCall(
assigned_variable="_keyword",
function="expect",
arguments=[self.keyword_cache[keyword]],
return_type="Token*",
nodetype=NodeTypes.KEYWORD,
comment=f"token='{keyword}'",
)
def soft_keyword_helper(self, value: str) -> FunctionCall:
self.soft_keywords.add(value.replace('"', ""))
return FunctionCall(
assigned_variable="_keyword",
function="expect_SOFT_KEYWORD",
arguments=[value],
return_type="expr_ty",
nodetype=NodeTypes.SOFT_KEYWORD,
comment=f"soft_keyword='{value}'",
)
def visit_NameLeaf(self, node: NameLeaf) -> FunctionCall:
name = node.value
if name in self.non_exact_tokens:
if name in BASE_NODETYPES:
return FunctionCall(
assigned_variable=f"{name.lower()}_var",
function = f"{name.lower()}_token",
arguments=[],
nodetype=BASE_NODETYPES[name][0],
return_type=BASE_NODETYPES[name][1],
comment=name,
)
return FunctionCall(
assigned_variable=f"{name.lower()}_var",
function=f"expect",
arguments=["Token.Kind." + name],
nodetype=NodeTypes.GENERIC_TOKEN,
return_type="Token*",
comment=f"token='{name}'",
)
type = None
rule = self.gen.all_rules.get(name.lower())
if rule is not None:
type = self.gen.typingvisitor.visit(rule) # Java type change
return FunctionCall(
assigned_variable=f"{name}_var",
function=f"{name}_rule",
arguments=[],
return_type=type,
comment=f"{node}",
)
def visit_StringLeaf(self, node: StringLeaf) -> FunctionCall:
val = ast.literal_eval(node.value)
if re.match(r"[a-zA-Z_]\w*\Z", val): # This is a keyword
if node.value.endswith("'"):
return self.keyword_helper(val)
else:
return self.soft_keyword_helper(node.value)
else:
assert val in self.exact_tokens, f"{node.value} is not a known literal"
type = self.exact_tokens[val]
return FunctionCall(
assigned_variable="_literal",
function=f"expect",
arguments=[type],
nodetype=NodeTypes.GENERIC_TOKEN,
return_type="Token*",
comment=f"token='{val}'",
)
def visit_Rhs(self, node: Rhs) -> FunctionCall:
if node in self.cache:
return self.cache[node]
# TODO can we inline generated calls?
name = self.gen.artifical_rule_from_rhs(node)
self.cache[node] = FunctionCall(
assigned_variable=f"{name}_var",
function=f"{name}_rule",
arguments=[],
# Begin Java type hack
return_type=self.gen.typingvisitor.visit(node),
# End Java type hack
comment=f"{node}",
)
return self.cache[node]
def visit_NamedItem(self, node: NamedItem) -> FunctionCall:
call = self.generate_call(node.item)
if node.name:
call.assigned_variable = node.name
if node.type:
call.assigned_variable_type = node.type
return call
def lookahead_call_helper(self, node: Lookahead, positive: str) -> FunctionCall:
# The c_generator passes function pointers, something we cannot do in
# Java. Instead, we generate helper functions for the function names
# passed in. Instead of the C-style overload suffixes
# (lookahead_with_name, _with_string, _with_int), we set the
# call.argtypes, which are consumed later when we generate the
# gen.lookahead_functions
call = self.generate_call(node.node)
fname = f"genLookahead_{call.function}"
if fname not in self.gen.lookahead_functions:
self.gen.lookahead_functions[fname] = call
call.argtypes = ()
if call.nodetype == NodeTypes.NAME_TOKEN:
return FunctionCall(
function=fname,
arguments=[positive, *call.arguments],
return_type="boolean",
)
elif call.nodetype == NodeTypes.SOFT_KEYWORD:
call.argtypes = ("String",)
return FunctionCall(
function=fname,
arguments=[positive, *call.arguments],
return_type="boolean",
)
elif call.nodetype in {NodeTypes.GENERIC_TOKEN, NodeTypes.KEYWORD}:
call.argtypes = ("int",)
return FunctionCall(
function=fname,
arguments=[positive, *call.arguments],
return_type="boolean",
comment=f"token={node.node}",
)
else:
assert len(call.arguments) == 0
return FunctionCall(
function=fname,
arguments=[positive, *call.arguments],
return_type="boolean",
)
def visit_PositiveLookahead(self, node: PositiveLookahead) -> FunctionCall:
return self.lookahead_call_helper(node, "true")
def visit_NegativeLookahead(self, node: NegativeLookahead) -> FunctionCall:
return self.lookahead_call_helper(node, "false")
def visit_Forced(self, node: Forced) -> FunctionCall:
call = self.generate_call(node.node)
if call.nodetype == NodeTypes.GENERIC_TOKEN:
# val = ast.literal_eval(node.node.value)
val = eval(node.node.value) # FIXME: this is unsafe
assert val in self.exact_tokens, f"{node.value} is not a known literal"
type = self.exact_tokens[val]
return FunctionCall(
assigned_variable="_literal",
function=f"expect_forced_token",
arguments=[type, f'"{val}"'],
nodetype=NodeTypes.GENERIC_TOKEN,
return_type="Token*",
comment=f"forced_token='{val}'",
)
else:
raise NotImplementedError(
f"Forced tokens don't work with {call.nodetype} tokens")
def visit_Opt(self, node: Opt) -> FunctionCall:
call = self.generate_call(node.node)
return FunctionCall(
assigned_variable="_opt_var",
function=call.function,
arguments=call.arguments,
# Begin Java type hack
return_type=call.return_type,
# End Java type hack
force_true=True,
comment=f"{node}",
)
def visit_Repeat0(self, node: Repeat0) -> FunctionCall:
if node in self.cache:
return self.cache[node]
name = self.gen.artificial_rule_from_repeat(node.node, False)
self.cache[node] = FunctionCall(
assigned_variable=f"{name}_var",
function=f"{name}_rule",
arguments=[],
return_type=self.gen.typingvisitor.visit(node), # Java type hack
comment=f"{node}",
)
return self.cache[node]
def visit_Repeat1(self, node: Repeat1) -> FunctionCall:
if node in self.cache:
return self.cache[node]
name = self.gen.artificial_rule_from_repeat(node.node, True)
self.cache[node] = FunctionCall(
assigned_variable=f"{name}_var",
function=f"{name}_rule",
arguments=[],
return_type=self.gen.typingvisitor.visit(node), # Java type hack
comment=f"{node}",
)
return self.cache[node]
def visit_Gather(self, node: Gather) -> FunctionCall:
if node in self.cache:
return self.cache[node]
name = self.gen.artifical_rule_from_gather(node)
self.cache[node] = FunctionCall(
assigned_variable=f"{name}_var",
function=f"{name}_rule",
arguments=[],
return_type=self.gen.typingvisitor.visit(node), # Java type hack
comment=f"{node}",
)
return self.cache[node]
def visit_Group(self, node: Group) -> FunctionCall:
return self.generate_call(node.rhs)
def visit_Cut(self, node: Cut) -> FunctionCall:
return FunctionCall(
assigned_variable="_cut_var",
return_type="int",
function="1",
nodetype=NodeTypes.CUT_OPERATOR,
)
def generate_call(self, node: Any) -> FunctionCall:
return super().visit(node)
class ActionMapperVisitor(GrammarVisitor):
def __init__(self):
self.action_counter = Counter()
self.current_rule = None
def visit_Rule(self, node: Rule):
self.current_rule = node
self.generic_visit(node)
def visit_Alt(self, node: Alt):
if node.action:
c_action = str(node.action)
if c_action in ACTION_MAPPINGS:
java_action = ACTION_MAPPINGS[c_action][1]
self.action_counter.update([c_action])
else:
for pattern, (_, repl) in ACTION_MAPPINGS_RE.items():
java_action, m = re.subn(f"^{pattern}$", repl, c_action)
if m:
self.action_counter.update([pattern])
break
else:
raise ValueError(f"Missing mapping for action '{c_action}' in rule \"{self.current_rule.name}: with rhs {node}\"")
for k, v in SHORTCUTS.items():
java_action = java_action.replace(k, v)
node.action = java_action
self.generic_visit(node)
def map_actions(self, grammar):
self.visit(grammar)
for c_action, (expected_count, _) in ACTION_MAPPINGS.items():
if expected_count != self.action_counter[c_action]:
raise ValueError(f"Expected to find {expected_count} occurrences of action '{c_action}', but {self.action_counter[c_action]} were found")
for pattern, (expected_count, _) in ACTION_MAPPINGS_RE.items():
if expected_count != self.action_counter[pattern]:
raise ValueError(f"Expected to find {expected_count} occurrences of regex '{pattern}', but {self.action_counter[pattern]} were found")
class JavaParserGenerator(ParserGenerator, GrammarVisitor):
def __init__(
self,
grammar: grammar.Grammar,
tokens: Dict[int, str],
exact_tokens: Dict[str, int],
non_exact_tokens: Set[str],
file: Optional[IO[Text]],
debug: bool = True,
skip_actions: bool = False,
):
super().__init__(grammar, set(tokens.values()), file)
self.typingvisitor = TypingVisitor(self) # Java type hack
self.callmakervisitor = JavaCallMakerVisitor(self, exact_tokens, non_exact_tokens, self.print)
self.lookahead_functions: Dict[str, FunctionCall] = {}
self.debug = debug
self.skip_actions = skip_actions
self.goto_targets = []
self._collected_type = []
ActionMapperVisitor().map_actions(grammar)
def add_level(self) -> None:
if self.debug:
self.print("level++;")
def remove_level(self) -> None:
if self.debug:
self.print("level--;")
def add_return(self, ret_val: str) -> None:
self.remove_level()
self.print(f"return {ret_val};")
def unique_varname(self, name: str = "tmpvar") -> str:
new_var = name + "_" + str(self._varname_counter)
self._varname_counter += 1
return new_var
def call_with_errorcheck_return(self, call_text: str, returnval: str) -> None:
# error's in Java come via exceptions, which we just let propagate
self.print(f"{call_text};")
def call_with_errorcheck_goto(self, call_text: str, goto_target: str) -> None:
"not used in Java"
pass
def out_of_memory_return(self, expr: str, cleanup_code: Optional[str] = None,) -> None:
"not used in Java"
pass
def out_of_memory_goto(self, expr: str, goto_target: str) -> None:
"not used in Java"
pass
def generate(self, filename: str) -> None:
self.collect_rules()
# Java specific stuff
self.print(LICENSE)
self.print("// Checkstyle: stop")
self.print("// JaCoCo Exclude")
self.print("//@formatter:off")
self.print(f"// Generated from {filename} by pegen")
self.print("package com.oracle.graal.python.pegparser;")
self.print(IMPORTS)
className = os.path.splitext(os.path.basename(self.file.name))[0]
self.print('@SuppressWarnings({"all", "cast"})')
self.print('@SuppressFBWarnings')
self.print("public final class %s extends AbstractParser {" % className)
# Java needs a few fields declarations. Also, we're now in a class
self.level += 1
self.print()
# Now back to c generator analogue
self._setup_keywords()
self._setup_soft_keywords()
for i, (rulename, rule) in enumerate(self.all_rules.items(), 1000):
comment = " // Left-recursive" if rule.left_recursive else ""
self.print(f"private static final int {rulename.upper()}_ID = {i};{comment}")
self.print()
# Java needs a constructor
self.print("public %s(String source, SourceRange sourceRange, ParserCallbacks parserCb, InputType startRule, EnumSet<Flags> flags, int featureVersion) {" % className)
with self.indent():
self.print("super(source, sourceRange, parserCb, startRule, flags, featureVersion);")
self.print("}")
self.print()
self.print("public %s(String source, ParserCallbacks parserCb, InputType startRule, EnumSet<Flags> flags, int featureVersion) {" % className)
with self.indent():
self.print("super(source, null, parserCb, startRule, flags, featureVersion);")
self.print("}")
# we don't need the C declarations, so straight to the rule functions as in c_generator
for rulename, rule in list(self.all_rules.items()):
self.print()
if rule.left_recursive:
self.print("// Left-recursive")
self.visit(rule)
self._generate_lookahead_methods()
for todo in getattr(self, "_type_conversions", {}).keys():
self.print(todo)
self.print(TRAILER)
self.level -= 1
self.print("}")
def _group_keywords_by_length(self) -> Dict[int, List[Tuple[str, int]]]:
groups: Dict[int, List[Tuple[str, int]]] = {}
for keyword_str, keyword_type in self.callmakervisitor.keyword_cache.items():
length = len(keyword_str)
if length in groups:
groups[length].append((keyword_str, keyword_type))
else:
groups[length] = [(keyword_str, keyword_type)]
return groups
def _setup_keywords(self) -> None:
keyword_cache = self.callmakervisitor.keyword_cache
n_keyword_lists = (
len(max(keyword_cache.keys(), key=len)) + 1 if len(keyword_cache) > 0 else 0
)
groups = self._group_keywords_by_length()
self.print("private static final Object[][][] reservedKeywords = new Object[][][]{")
with self.indent():
num_groups = max(groups) + 1 if groups else 1
for keywords_length in range(num_groups):
if keywords_length not in groups.keys():
self.print("null,")
else:
self.print("{")
with self.indent():
for keyword_str, keyword_type in groups[keywords_length]:
self.print(f'{{"{keyword_str}", {keyword_type}}},')
self.print("},")
self.print("};")
self.print("@Override")