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https://github.com/dart-lang/sdk
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[parser] Ensure that list and map pattern parsing always makes progress.
In rare circumstances involving syntax errors, the `parsePattern` method inserts a synthetic token but does not consume any tokens. Usually when this happens it's not a problem, because whatever method is calling `parsePattern` consumes some tokens, so the parser always makes progress. However, when parsing list patterns, after calling `parsePattern`, the parser would look for a `,`, and if it didn't find one, it would supply a synthetic `,` and call `parsePattern` again, resulting in an infinite loop. A similar situation happened with map patterns, though the situation was more complex because in between the calls to `parsePattern`, the parser would also create synthetic key expressions and `:`s. To fix the problem, when parsing a list or map pattern, after the call to `parsePattern`, the parser checks whether any tokens were consumed. If no tokens were consumed, it ignores the next token from the input stream in order to make progress. I also investigated whether there were similar issues with parenthesized/record patterns and switch expressions, since those constructs also consist of a sequence of patterns separated by tokens and other things that could in principle be supplied synthetically. Fortunately, parser recovery doesn't get into an infinite loop in those cases, so I didn't make any further changes. But I did include test cases to make sure. Fixes #52352. Bug: https://github.com/dart-lang/sdk/issues/52352 Change-Id: Idc8140236f6054deb1fd3c862036fe47dd84f30b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/302803 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Paul Berry <paulberry@google.com>
This commit is contained in:
Paul Berry
Commit Queue
parent
48346c458a
commit
8d2b2a197d
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@ -10061,6 +10061,12 @@ class Parser {
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listener.handleRestPattern(dots, hasSubPattern: hasSubPattern);
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} else {
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token = parsePattern(token, patternContext);
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if (identical(next, token.next)) {
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// No tokens were consumed (though it's possible that a synthetic
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// token was inserted). If this happens, go ahead and skip the next
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// token to ensure that progress is made.
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token = token.next!;
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}
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}
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next = token.next!;
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++count;
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@ -10136,6 +10142,12 @@ class Parser {
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new SyntheticToken(TokenType.COLON, next.charOffset));
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}
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token = parsePattern(colon, patternContext);
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if (identical(next, token.next)) {
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// No tokens were consumed (though it's possible that a synthetic
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// token was inserted). If this happens, go ahead and skip the next
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// token to ensure that progress is made.
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token = token.next!;
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}
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listener.handleMapPatternEntry(colon, token.next!);
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}
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++count;
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@ -9730,6 +9730,158 @@ SwitchExpression
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''');
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}
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test_syntheticIdentifier_insideListPattern() {
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_parse('''
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void f(Object? x) {
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switch (x) {
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case [if]:
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};
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}
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''', errors: [
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error(ParserErrorCode.MISSING_IDENTIFIER, 45, 2),
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]);
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var node = findNode.switchPatternCase('case');
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assertParsedNodeText(node, r'''
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SwitchPatternCase
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keyword: case
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guardedPattern: GuardedPattern
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pattern: ListPattern
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leftBracket: [
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elements
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ConstantPattern
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expression: SimpleIdentifier
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token: <empty> <synthetic>
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rightBracket: ]
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colon: :
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''');
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}
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test_syntheticIdentifier_insideMapPattern() {
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_parse('''
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void f(Object? x) {
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switch (x) {
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case {0: if}:
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};
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}
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''', errors: [
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error(ParserErrorCode.MISSING_IDENTIFIER, 48, 2),
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error(ParserErrorCode.EXPECTED_TOKEN, 48, 2),
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error(ParserErrorCode.EXPECTED_TOKEN, 48, 2),
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]);
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var node = findNode.switchPatternCase('case');
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assertParsedNodeText(node, r'''
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SwitchPatternCase
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keyword: case
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guardedPattern: GuardedPattern
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pattern: MapPattern
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leftBracket: {
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elements
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MapPatternEntry
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key: IntegerLiteral
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literal: 0
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separator: :
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value: ConstantPattern
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expression: SimpleIdentifier
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token: <empty> <synthetic>
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MapPatternEntry
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key: SimpleIdentifier
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token: <empty> <synthetic>
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separator: : <synthetic>
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value: ConstantPattern
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expression: SimpleIdentifier
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token: <empty> <synthetic>
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rightBracket: }
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colon: :
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''');
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}
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test_syntheticIdentifier_insideParenthesizedPattern() {
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_parse('''
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void f(Object? x) {
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switch (x) {
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case (if):
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};
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}
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''', errors: [
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error(ParserErrorCode.MISSING_IDENTIFIER, 45, 2),
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error(ParserErrorCode.EXPECTED_TOKEN, 45, 2),
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]);
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var node = findNode.switchPatternCase('case');
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assertParsedNodeText(node, r'''
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SwitchPatternCase
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keyword: case
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guardedPattern: GuardedPattern
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pattern: ParenthesizedPattern
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leftParenthesis: (
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pattern: ConstantPattern
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expression: SimpleIdentifier
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token: <empty> <synthetic>
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rightParenthesis: )
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colon: :
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''');
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}
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test_syntheticIdentifier_insideRecordPattern() {
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_parse('''
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void f(Object? x) {
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switch (x) {
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case (_, if):
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};
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}
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''', errors: [
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error(ParserErrorCode.MISSING_IDENTIFIER, 48, 2),
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error(ParserErrorCode.EXPECTED_TOKEN, 48, 2),
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]);
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var node = findNode.switchPatternCase('case');
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assertParsedNodeText(node, r'''
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SwitchPatternCase
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keyword: case
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guardedPattern: GuardedPattern
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pattern: RecordPattern
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leftParenthesis: (
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fields
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PatternField
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pattern: WildcardPattern
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name: _
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PatternField
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pattern: ConstantPattern
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expression: SimpleIdentifier
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token: <empty> <synthetic>
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rightParenthesis: )
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colon: :
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''');
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}
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test_syntheticIdentifier_insideSwitchExpression() {
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_parse('''
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void f(Object? x) => switch (x) {if};
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''', errors: [
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error(ParserErrorCode.MISSING_IDENTIFIER, 33, 2),
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error(ParserErrorCode.EXPECTED_TOKEN, 33, 2),
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error(ParserErrorCode.EXPECTED_TOKEN, 33, 2),
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]);
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var node = findNode.switchExpression('if');
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assertParsedNodeText(node, r'''
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SwitchExpression
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switchKeyword: switch
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leftParenthesis: (
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expression: SimpleIdentifier
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token: x
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rightParenthesis: )
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leftBracket: {
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cases
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SwitchExpressionCase
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guardedPattern: GuardedPattern
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pattern: ConstantPattern
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expression: SimpleIdentifier
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token: <empty> <synthetic>
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arrow: => <synthetic>
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expression: SimpleIdentifier
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token: <empty> <synthetic>
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rightBracket: }
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''');
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}
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test_typeQuestionBeforeWhen_conditional() {
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// The logic for parsing types has special disambiguation rules for deciding
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// whether a trailing `?` should be included in the type; these rules are
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@ -0,0 +1,5 @@
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void f(Object? x) {
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switch (x) {
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case [if]:
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};
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}
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@ -0,0 +1,59 @@
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Problems reported:
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parser/patterns/syntheticIdentifier_insideListPattern:3:11: Expected an identifier, but got 'if'.
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case [if]:
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^^
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beginCompilationUnit(void)
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beginMetadataStar(void)
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endMetadataStar(0)
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beginTopLevelMember(void)
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beginTopLevelMethod(, null, null)
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handleVoidKeyword(void)
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handleIdentifier(f, topLevelFunctionDeclaration)
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handleNoTypeVariables(()
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beginFormalParameters((, MemberKind.TopLevelMethod)
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beginMetadataStar(Object)
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endMetadataStar(0)
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beginFormalParameter(Object, MemberKind.TopLevelMethod, null, null, null)
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handleIdentifier(Object, typeReference)
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handleNoTypeArguments(?)
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handleType(Object, ?)
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handleIdentifier(x, formalParameterDeclaration)
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handleFormalParameterWithoutValue())
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endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
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endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
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handleAsyncModifier(null, null)
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beginBlockFunctionBody({)
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beginSwitchStatement(switch)
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handleIdentifier(x, expression)
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handleNoTypeArguments())
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handleNoArguments())
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handleSend(x, ))
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handleParenthesizedCondition((, null, null)
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beginSwitchBlock({)
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beginCaseExpression(case)
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beginPattern(case)
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handleNoTypeArguments([)
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beginPattern([)
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beginConstantPattern(null)
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handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
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handleIdentifier(, expression)
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handleNoTypeArguments(if)
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handleNoArguments(if)
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handleSend(, if)
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endConstantPattern(null)
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endPattern()
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handleListPattern(1, [, ])
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endPattern(])
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handleSwitchCaseNoWhenClause(])
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endCaseExpression(case, null, :)
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beginSwitchCase(0, 1, case)
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endSwitchCase(0, 1, null, null, 0, case, })
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endSwitchBlock(1, {, })
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endSwitchStatement(switch, })
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handleEmptyStatement(;)
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endBlockFunctionBody(2, {, })
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endTopLevelMethod(void, null, })
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endTopLevelDeclaration()
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endCompilationUnit(1, )
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@ -0,0 +1,119 @@
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parseUnit(void)
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skipErrorTokens(void)
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listener: beginCompilationUnit(void)
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syntheticPreviousToken(void)
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parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
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parseMetadataStar()
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listener: beginMetadataStar(void)
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listener: endMetadataStar(0)
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parseTopLevelMemberImpl()
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listener: beginTopLevelMember(void)
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parseTopLevelMethod(, null, null, , Instance of 'VoidType', null, f, false)
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listener: beginTopLevelMethod(, null, null)
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listener: handleVoidKeyword(void)
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ensureIdentifierPotentiallyRecovered(void, topLevelFunctionDeclaration, false)
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listener: handleIdentifier(f, topLevelFunctionDeclaration)
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parseMethodTypeVar(f)
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listener: handleNoTypeVariables(()
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parseGetterOrFormalParameters(f, f, false, MemberKind.TopLevelMethod)
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parseFormalParameters(f, MemberKind.TopLevelMethod)
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parseFormalParametersRest((, MemberKind.TopLevelMethod)
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listener: beginFormalParameters((, MemberKind.TopLevelMethod)
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parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
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parseMetadataStar(()
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listener: beginMetadataStar(Object)
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listener: endMetadataStar(0)
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listener: beginFormalParameter(Object, MemberKind.TopLevelMethod, null, null, null)
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listener: handleIdentifier(Object, typeReference)
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listener: handleNoTypeArguments(?)
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listener: handleType(Object, ?)
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ensureIdentifier(?, formalParameterDeclaration)
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listener: handleIdentifier(x, formalParameterDeclaration)
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listener: handleFormalParameterWithoutValue())
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listener: endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
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listener: endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
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parseAsyncModifierOpt())
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listener: handleAsyncModifier(null, null)
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inPlainSync()
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parseFunctionBody(), false, false)
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listener: beginBlockFunctionBody({)
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notEofOrValue(}, switch)
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parseStatement({)
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parseStatementX({)
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parseSwitchStatement({)
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listener: beginSwitchStatement(switch)
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ensureParenthesizedCondition(switch, allowCase: false)
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parseExpressionInParenthesisRest((, allowCase: false)
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parseExpression(()
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looksLikeOuterPatternEquals(()
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skipOuterPattern(()
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skipObjectPatternRest(x)
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parsePrecedenceExpression((, 1, true, ConstantPatternContext.none)
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parseUnaryExpression((, true, ConstantPatternContext.none)
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parsePrimary((, expression, ConstantPatternContext.none)
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parseSendOrFunctionLiteral((, expression, ConstantPatternContext.none)
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parseSend((, expression, ConstantPatternContext.none)
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isNextIdentifier(()
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ensureIdentifier((, expression)
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listener: handleIdentifier(x, expression)
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listener: handleNoTypeArguments())
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parseArgumentsOpt(x)
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listener: handleNoArguments())
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listener: handleSend(x, ))
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ensureCloseParen(x, ()
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listener: handleParenthesizedCondition((, null, null)
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parseSwitchBlock())
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ensureBlock(), null, switch statement)
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listener: beginSwitchBlock({)
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notEofOrValue(}, case)
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peekPastLabels(case)
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listener: beginCaseExpression(case)
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parsePattern(case, PatternContext.matching, precedence: 1)
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listener: beginPattern(case)
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parsePrimaryPattern(case, PatternContext.matching)
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listener: handleNoTypeArguments([)
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parseListPatternSuffix(case, PatternContext.matching)
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parsePattern([, PatternContext.matching, precedence: 1)
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listener: beginPattern([)
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parsePrimaryPattern([, PatternContext.matching)
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listener: beginConstantPattern(null)
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parsePrecedenceExpression([, 7, false, ConstantPatternContext.implicit)
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parseUnaryExpression([, false, ConstantPatternContext.implicit)
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parsePrimary([, expression, ConstantPatternContext.implicit)
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inPlainSync()
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parseSend([, expression, ConstantPatternContext.implicit)
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isNextIdentifier([)
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ensureIdentifier([, expression)
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reportRecoverableErrorWithToken(if, Instance of 'Template<(Token) => Message>')
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listener: handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
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rewriter()
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listener: handleIdentifier(, expression)
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listener: handleNoTypeArguments(if)
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parseArgumentsOpt()
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listener: handleNoArguments(if)
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listener: handleSend(, if)
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listener: endConstantPattern(null)
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listener: endPattern()
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listener: handleListPattern(1, [, ])
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listener: endPattern(])
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listener: handleSwitchCaseNoWhenClause(])
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ensureColon(])
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listener: endCaseExpression(case, null, :)
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peekPastLabels(})
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parseStatementsInSwitchCase(:, }, case, 0, 1, null, null)
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listener: beginSwitchCase(0, 1, case)
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listener: endSwitchCase(0, 1, null, null, 0, case, })
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notEofOrValue(}, })
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listener: endSwitchBlock(1, {, })
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listener: endSwitchStatement(switch, })
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notEofOrValue(}, ;)
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parseStatement(})
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parseStatementX(})
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parseEmptyStatement(})
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listener: handleEmptyStatement(;)
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notEofOrValue(}, })
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listener: endBlockFunctionBody(2, {, })
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listener: endTopLevelMethod(void, null, })
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listener: endTopLevelDeclaration()
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reportAllErrorTokens(void)
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listener: endCompilationUnit(1, )
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@ -0,0 +1,15 @@
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NOTICE: Stream was rewritten by parser!
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void f(Object? x) {
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switch (x) {
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case [*synthetic*if]:
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};
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}
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void[KeywordToken] f[StringToken]([BeginToken]Object[StringToken]?[SimpleToken] x[StringToken])[SimpleToken] {[BeginToken]
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switch[KeywordToken] ([BeginToken]x[StringToken])[SimpleToken] {[BeginToken]
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case[KeywordToken] [[BeginToken][SyntheticStringToken]if[KeywordToken]][SimpleToken]:[SimpleToken]
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}[SimpleToken];[SimpleToken]
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}[SimpleToken]
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[SimpleToken]
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@ -0,0 +1,13 @@
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void f(Object? x) {
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switch (x) {
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case [if]:
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};
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}
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void[KeywordToken] f[StringToken]([BeginToken]Object[StringToken]?[SimpleToken] x[StringToken])[SimpleToken] {[BeginToken]
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switch[KeywordToken] ([BeginToken]x[StringToken])[SimpleToken] {[BeginToken]
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case[KeywordToken] [[BeginToken]if[KeywordToken]][SimpleToken]:[SimpleToken]
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}[SimpleToken];[SimpleToken]
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}[SimpleToken]
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[SimpleToken]
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@ -0,0 +1,5 @@
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void f(Object? x) {
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switch (x) {
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case {0: if}:
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};
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}
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@ -0,0 +1,94 @@
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Problems reported:
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parser/patterns/syntheticIdentifier_insideMapPattern:3:14: Expected an identifier, but got 'if'.
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case {0: if}:
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^^
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parser/patterns/syntheticIdentifier_insideMapPattern:3:14: Expected ',' before this.
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case {0: if}:
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^^
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parser/patterns/syntheticIdentifier_insideMapPattern:3:14: Expected an identifier, but got 'if'.
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case {0: if}:
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^^
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parser/patterns/syntheticIdentifier_insideMapPattern:3:14: Expected ':' before this.
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case {0: if}:
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^^
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parser/patterns/syntheticIdentifier_insideMapPattern:3:14: Expected an identifier, but got 'if'.
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case {0: if}:
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^^
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beginCompilationUnit(void)
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beginMetadataStar(void)
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endMetadataStar(0)
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beginTopLevelMember(void)
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beginTopLevelMethod(, null, null)
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handleVoidKeyword(void)
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handleIdentifier(f, topLevelFunctionDeclaration)
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handleNoTypeVariables(()
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beginFormalParameters((, MemberKind.TopLevelMethod)
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beginMetadataStar(Object)
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endMetadataStar(0)
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beginFormalParameter(Object, MemberKind.TopLevelMethod, null, null, null)
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handleIdentifier(Object, typeReference)
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handleNoTypeArguments(?)
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handleType(Object, ?)
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handleIdentifier(x, formalParameterDeclaration)
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handleFormalParameterWithoutValue())
|
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endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
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endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
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handleAsyncModifier(null, null)
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beginBlockFunctionBody({)
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beginSwitchStatement(switch)
|
||||
handleIdentifier(x, expression)
|
||||
handleNoTypeArguments())
|
||||
handleNoArguments())
|
||||
handleSend(x, ))
|
||||
handleParenthesizedCondition((, null, null)
|
||||
beginSwitchBlock({)
|
||||
beginCaseExpression(case)
|
||||
beginPattern(case)
|
||||
handleNoTypeArguments({)
|
||||
handleLiteralInt(0)
|
||||
beginPattern(:)
|
||||
beginConstantPattern(null)
|
||||
handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
handleIdentifier(, expression)
|
||||
handleNoTypeArguments(if)
|
||||
handleNoArguments(if)
|
||||
handleSend(, if)
|
||||
endConstantPattern(null)
|
||||
endPattern()
|
||||
handleMapPatternEntry(:, if)
|
||||
handleRecoverableError(Message[ExpectedButGot, Expected ',' before this., null, {string: ,}], if, if)
|
||||
handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
handleIdentifier(, expression)
|
||||
handleNoTypeArguments(if)
|
||||
handleNoArguments(if)
|
||||
handleSend(, if)
|
||||
handleRecoverableError(Message[ExpectedButGot, Expected ':' before this., null, {string: :}], if, if)
|
||||
beginPattern(:)
|
||||
beginConstantPattern(null)
|
||||
handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
handleIdentifier(, expression)
|
||||
handleNoTypeArguments(if)
|
||||
handleNoArguments(if)
|
||||
handleSend(, if)
|
||||
endConstantPattern(null)
|
||||
endPattern()
|
||||
handleMapPatternEntry(:, })
|
||||
handleMapPattern(2, {, })
|
||||
endPattern(})
|
||||
handleSwitchCaseNoWhenClause(})
|
||||
endCaseExpression(case, null, :)
|
||||
beginSwitchCase(0, 1, case)
|
||||
endSwitchCase(0, 1, null, null, 0, case, })
|
||||
endSwitchBlock(1, {, })
|
||||
endSwitchStatement(switch, })
|
||||
handleEmptyStatement(;)
|
||||
endBlockFunctionBody(2, {, })
|
||||
endTopLevelMethod(void, null, })
|
||||
endTopLevelDeclaration()
|
||||
endCompilationUnit(1, )
|
||||
|
|
@ -0,0 +1,176 @@
|
|||
parseUnit(void)
|
||||
skipErrorTokens(void)
|
||||
listener: beginCompilationUnit(void)
|
||||
syntheticPreviousToken(void)
|
||||
parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
|
||||
parseMetadataStar()
|
||||
listener: beginMetadataStar(void)
|
||||
listener: endMetadataStar(0)
|
||||
parseTopLevelMemberImpl()
|
||||
listener: beginTopLevelMember(void)
|
||||
parseTopLevelMethod(, null, null, , Instance of 'VoidType', null, f, false)
|
||||
listener: beginTopLevelMethod(, null, null)
|
||||
listener: handleVoidKeyword(void)
|
||||
ensureIdentifierPotentiallyRecovered(void, topLevelFunctionDeclaration, false)
|
||||
listener: handleIdentifier(f, topLevelFunctionDeclaration)
|
||||
parseMethodTypeVar(f)
|
||||
listener: handleNoTypeVariables(()
|
||||
parseGetterOrFormalParameters(f, f, false, MemberKind.TopLevelMethod)
|
||||
parseFormalParameters(f, MemberKind.TopLevelMethod)
|
||||
parseFormalParametersRest((, MemberKind.TopLevelMethod)
|
||||
listener: beginFormalParameters((, MemberKind.TopLevelMethod)
|
||||
parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
|
||||
parseMetadataStar(()
|
||||
listener: beginMetadataStar(Object)
|
||||
listener: endMetadataStar(0)
|
||||
listener: beginFormalParameter(Object, MemberKind.TopLevelMethod, null, null, null)
|
||||
listener: handleIdentifier(Object, typeReference)
|
||||
listener: handleNoTypeArguments(?)
|
||||
listener: handleType(Object, ?)
|
||||
ensureIdentifier(?, formalParameterDeclaration)
|
||||
listener: handleIdentifier(x, formalParameterDeclaration)
|
||||
listener: handleFormalParameterWithoutValue())
|
||||
listener: endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
|
||||
listener: endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
|
||||
parseAsyncModifierOpt())
|
||||
listener: handleAsyncModifier(null, null)
|
||||
inPlainSync()
|
||||
parseFunctionBody(), false, false)
|
||||
listener: beginBlockFunctionBody({)
|
||||
notEofOrValue(}, switch)
|
||||
parseStatement({)
|
||||
parseStatementX({)
|
||||
parseSwitchStatement({)
|
||||
listener: beginSwitchStatement(switch)
|
||||
ensureParenthesizedCondition(switch, allowCase: false)
|
||||
parseExpressionInParenthesisRest((, allowCase: false)
|
||||
parseExpression(()
|
||||
looksLikeOuterPatternEquals(()
|
||||
skipOuterPattern(()
|
||||
skipObjectPatternRest(x)
|
||||
parsePrecedenceExpression((, 1, true, ConstantPatternContext.none)
|
||||
parseUnaryExpression((, true, ConstantPatternContext.none)
|
||||
parsePrimary((, expression, ConstantPatternContext.none)
|
||||
parseSendOrFunctionLiteral((, expression, ConstantPatternContext.none)
|
||||
parseSend((, expression, ConstantPatternContext.none)
|
||||
isNextIdentifier(()
|
||||
ensureIdentifier((, expression)
|
||||
listener: handleIdentifier(x, expression)
|
||||
listener: handleNoTypeArguments())
|
||||
parseArgumentsOpt(x)
|
||||
listener: handleNoArguments())
|
||||
listener: handleSend(x, ))
|
||||
ensureCloseParen(x, ()
|
||||
listener: handleParenthesizedCondition((, null, null)
|
||||
parseSwitchBlock())
|
||||
ensureBlock(), null, switch statement)
|
||||
listener: beginSwitchBlock({)
|
||||
notEofOrValue(}, case)
|
||||
peekPastLabels(case)
|
||||
listener: beginCaseExpression(case)
|
||||
parsePattern(case, PatternContext.matching, precedence: 1)
|
||||
listener: beginPattern(case)
|
||||
parsePrimaryPattern(case, PatternContext.matching)
|
||||
listener: handleNoTypeArguments({)
|
||||
parseMapPatternSuffix(case, PatternContext.matching)
|
||||
parseExpression({)
|
||||
looksLikeOuterPatternEquals({)
|
||||
skipOuterPattern({)
|
||||
parsePrecedenceExpression({, 1, true, ConstantPatternContext.none)
|
||||
parseUnaryExpression({, true, ConstantPatternContext.none)
|
||||
parsePrimary({, expression, ConstantPatternContext.none)
|
||||
parseLiteralInt({)
|
||||
listener: handleLiteralInt(0)
|
||||
parsePattern(:, PatternContext.matching, precedence: 1)
|
||||
listener: beginPattern(:)
|
||||
parsePrimaryPattern(:, PatternContext.matching)
|
||||
listener: beginConstantPattern(null)
|
||||
parsePrecedenceExpression(:, 7, false, ConstantPatternContext.implicit)
|
||||
parseUnaryExpression(:, false, ConstantPatternContext.implicit)
|
||||
parsePrimary(:, expression, ConstantPatternContext.implicit)
|
||||
inPlainSync()
|
||||
parseSend(:, expression, ConstantPatternContext.implicit)
|
||||
isNextIdentifier(:)
|
||||
ensureIdentifier(:, expression)
|
||||
reportRecoverableErrorWithToken(if, Instance of 'Template<(Token) => Message>')
|
||||
listener: handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
rewriter()
|
||||
listener: handleIdentifier(, expression)
|
||||
listener: handleNoTypeArguments(if)
|
||||
parseArgumentsOpt()
|
||||
listener: handleNoArguments(if)
|
||||
listener: handleSend(, if)
|
||||
listener: endConstantPattern(null)
|
||||
listener: endPattern()
|
||||
listener: handleMapPatternEntry(:, if)
|
||||
rewriteAndRecover(, Message[ExpectedButGot, Expected ',' before this., null, {string: ,}], ,)
|
||||
reportRecoverableError(if, Message[ExpectedButGot, Expected ',' before this., null, {string: ,}])
|
||||
listener: handleRecoverableError(Message[ExpectedButGot, Expected ',' before this., null, {string: ,}], if, if)
|
||||
rewriter()
|
||||
parseExpression(,)
|
||||
looksLikeOuterPatternEquals(,)
|
||||
skipOuterPattern(,)
|
||||
parsePrecedenceExpression(,, 1, true, ConstantPatternContext.none)
|
||||
parseUnaryExpression(,, true, ConstantPatternContext.none)
|
||||
parsePrimary(,, expression, ConstantPatternContext.none)
|
||||
inPlainSync()
|
||||
parseSend(,, expression, ConstantPatternContext.none)
|
||||
isNextIdentifier(,)
|
||||
ensureIdentifier(,, expression)
|
||||
reportRecoverableErrorWithToken(if, Instance of 'Template<(Token) => Message>')
|
||||
listener: handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
rewriter()
|
||||
listener: handleIdentifier(, expression)
|
||||
listener: handleNoTypeArguments(if)
|
||||
parseArgumentsOpt()
|
||||
listener: handleNoArguments(if)
|
||||
listener: handleSend(, if)
|
||||
rewriteAndRecover(, Message[ExpectedButGot, Expected ':' before this., null, {string: :}], :)
|
||||
reportRecoverableError(if, Message[ExpectedButGot, Expected ':' before this., null, {string: :}])
|
||||
listener: handleRecoverableError(Message[ExpectedButGot, Expected ':' before this., null, {string: :}], if, if)
|
||||
rewriter()
|
||||
parsePattern(:, PatternContext.matching, precedence: 1)
|
||||
listener: beginPattern(:)
|
||||
parsePrimaryPattern(:, PatternContext.matching)
|
||||
listener: beginConstantPattern(null)
|
||||
parsePrecedenceExpression(:, 7, false, ConstantPatternContext.implicit)
|
||||
parseUnaryExpression(:, false, ConstantPatternContext.implicit)
|
||||
parsePrimary(:, expression, ConstantPatternContext.implicit)
|
||||
inPlainSync()
|
||||
parseSend(:, expression, ConstantPatternContext.implicit)
|
||||
isNextIdentifier(:)
|
||||
ensureIdentifier(:, expression)
|
||||
reportRecoverableErrorWithToken(if, Instance of 'Template<(Token) => Message>')
|
||||
listener: handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
rewriter()
|
||||
listener: handleIdentifier(, expression)
|
||||
listener: handleNoTypeArguments(if)
|
||||
parseArgumentsOpt()
|
||||
listener: handleNoArguments(if)
|
||||
listener: handleSend(, if)
|
||||
listener: endConstantPattern(null)
|
||||
listener: endPattern()
|
||||
listener: handleMapPatternEntry(:, })
|
||||
listener: handleMapPattern(2, {, })
|
||||
listener: endPattern(})
|
||||
listener: handleSwitchCaseNoWhenClause(})
|
||||
ensureColon(})
|
||||
listener: endCaseExpression(case, null, :)
|
||||
peekPastLabels(})
|
||||
parseStatementsInSwitchCase(:, }, case, 0, 1, null, null)
|
||||
listener: beginSwitchCase(0, 1, case)
|
||||
listener: endSwitchCase(0, 1, null, null, 0, case, })
|
||||
notEofOrValue(}, })
|
||||
listener: endSwitchBlock(1, {, })
|
||||
listener: endSwitchStatement(switch, })
|
||||
notEofOrValue(}, ;)
|
||||
parseStatement(})
|
||||
parseStatementX(})
|
||||
parseEmptyStatement(})
|
||||
listener: handleEmptyStatement(;)
|
||||
notEofOrValue(}, })
|
||||
listener: endBlockFunctionBody(2, {, })
|
||||
listener: endTopLevelMethod(void, null, })
|
||||
listener: endTopLevelDeclaration()
|
||||
reportAllErrorTokens(void)
|
||||
listener: endCompilationUnit(1, )
|
||||
|
|
@ -0,0 +1,15 @@
|
|||
NOTICE: Stream was rewritten by parser!
|
||||
|
||||
void f(Object? x) {
|
||||
switch (x) {
|
||||
case {0: *synthetic*,*synthetic*:*synthetic*if}:
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
void[KeywordToken] f[StringToken]([BeginToken]Object[StringToken]?[SimpleToken] x[StringToken])[SimpleToken] {[BeginToken]
|
||||
switch[KeywordToken] ([BeginToken]x[StringToken])[SimpleToken] {[BeginToken]
|
||||
case[KeywordToken] {[BeginToken]0[StringToken]:[SimpleToken] [SyntheticStringToken],[SyntheticToken][SyntheticStringToken]:[SyntheticToken][SyntheticStringToken]if[KeywordToken]}[SimpleToken]:[SimpleToken]
|
||||
}[SimpleToken];[SimpleToken]
|
||||
}[SimpleToken]
|
||||
[SimpleToken]
|
||||
|
|
@ -0,0 +1,13 @@
|
|||
void f(Object? x) {
|
||||
switch (x) {
|
||||
case {0: if}:
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
void[KeywordToken] f[StringToken]([BeginToken]Object[StringToken]?[SimpleToken] x[StringToken])[SimpleToken] {[BeginToken]
|
||||
switch[KeywordToken] ([BeginToken]x[StringToken])[SimpleToken] {[BeginToken]
|
||||
case[KeywordToken] {[BeginToken]0[StringToken]:[SimpleToken] if[KeywordToken]}[SimpleToken]:[SimpleToken]
|
||||
}[SimpleToken];[SimpleToken]
|
||||
}[SimpleToken]
|
||||
[SimpleToken]
|
||||
|
|
@ -0,0 +1,5 @@
|
|||
void f(Object? x) {
|
||||
switch (x) {
|
||||
case (if):
|
||||
};
|
||||
}
|
||||
|
|
@ -0,0 +1,63 @@
|
|||
Problems reported:
|
||||
|
||||
parser/patterns/syntheticIdentifier_insideParenthesizedPattern:3:11: Expected an identifier, but got 'if'.
|
||||
case (if):
|
||||
^^
|
||||
|
||||
parser/patterns/syntheticIdentifier_insideParenthesizedPattern:3:11: Expected ')' before this.
|
||||
case (if):
|
||||
^^
|
||||
|
||||
beginCompilationUnit(void)
|
||||
beginMetadataStar(void)
|
||||
endMetadataStar(0)
|
||||
beginTopLevelMember(void)
|
||||
beginTopLevelMethod(, null, null)
|
||||
handleVoidKeyword(void)
|
||||
handleIdentifier(f, topLevelFunctionDeclaration)
|
||||
handleNoTypeVariables(()
|
||||
beginFormalParameters((, MemberKind.TopLevelMethod)
|
||||
beginMetadataStar(Object)
|
||||
endMetadataStar(0)
|
||||
beginFormalParameter(Object, MemberKind.TopLevelMethod, null, null, null)
|
||||
handleIdentifier(Object, typeReference)
|
||||
handleNoTypeArguments(?)
|
||||
handleType(Object, ?)
|
||||
handleIdentifier(x, formalParameterDeclaration)
|
||||
handleFormalParameterWithoutValue())
|
||||
endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
|
||||
endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
|
||||
handleAsyncModifier(null, null)
|
||||
beginBlockFunctionBody({)
|
||||
beginSwitchStatement(switch)
|
||||
handleIdentifier(x, expression)
|
||||
handleNoTypeArguments())
|
||||
handleNoArguments())
|
||||
handleSend(x, ))
|
||||
handleParenthesizedCondition((, null, null)
|
||||
beginSwitchBlock({)
|
||||
beginCaseExpression(case)
|
||||
beginPattern(case)
|
||||
beginPattern(()
|
||||
beginConstantPattern(null)
|
||||
handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
handleIdentifier(, expression)
|
||||
handleNoTypeArguments(if)
|
||||
handleNoArguments(if)
|
||||
handleSend(, if)
|
||||
endConstantPattern(null)
|
||||
endPattern()
|
||||
handleRecoverableError(Message[ExpectedButGot, Expected ')' before this., null, {string: )}], if, if)
|
||||
handleParenthesizedPattern(()
|
||||
endPattern())
|
||||
handleSwitchCaseNoWhenClause())
|
||||
endCaseExpression(case, null, :)
|
||||
beginSwitchCase(0, 1, case)
|
||||
endSwitchCase(0, 1, null, null, 0, case, })
|
||||
endSwitchBlock(1, {, })
|
||||
endSwitchStatement(switch, })
|
||||
handleEmptyStatement(;)
|
||||
endBlockFunctionBody(2, {, })
|
||||
endTopLevelMethod(void, null, })
|
||||
endTopLevelDeclaration()
|
||||
endCompilationUnit(1, )
|
||||
|
|
@ -0,0 +1,121 @@
|
|||
parseUnit(void)
|
||||
skipErrorTokens(void)
|
||||
listener: beginCompilationUnit(void)
|
||||
syntheticPreviousToken(void)
|
||||
parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
|
||||
parseMetadataStar()
|
||||
listener: beginMetadataStar(void)
|
||||
listener: endMetadataStar(0)
|
||||
parseTopLevelMemberImpl()
|
||||
listener: beginTopLevelMember(void)
|
||||
parseTopLevelMethod(, null, null, , Instance of 'VoidType', null, f, false)
|
||||
listener: beginTopLevelMethod(, null, null)
|
||||
listener: handleVoidKeyword(void)
|
||||
ensureIdentifierPotentiallyRecovered(void, topLevelFunctionDeclaration, false)
|
||||
listener: handleIdentifier(f, topLevelFunctionDeclaration)
|
||||
parseMethodTypeVar(f)
|
||||
listener: handleNoTypeVariables(()
|
||||
parseGetterOrFormalParameters(f, f, false, MemberKind.TopLevelMethod)
|
||||
parseFormalParameters(f, MemberKind.TopLevelMethod)
|
||||
parseFormalParametersRest((, MemberKind.TopLevelMethod)
|
||||
listener: beginFormalParameters((, MemberKind.TopLevelMethod)
|
||||
parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
|
||||
parseMetadataStar(()
|
||||
listener: beginMetadataStar(Object)
|
||||
listener: endMetadataStar(0)
|
||||
listener: beginFormalParameter(Object, MemberKind.TopLevelMethod, null, null, null)
|
||||
listener: handleIdentifier(Object, typeReference)
|
||||
listener: handleNoTypeArguments(?)
|
||||
listener: handleType(Object, ?)
|
||||
ensureIdentifier(?, formalParameterDeclaration)
|
||||
listener: handleIdentifier(x, formalParameterDeclaration)
|
||||
listener: handleFormalParameterWithoutValue())
|
||||
listener: endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
|
||||
listener: endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
|
||||
parseAsyncModifierOpt())
|
||||
listener: handleAsyncModifier(null, null)
|
||||
inPlainSync()
|
||||
parseFunctionBody(), false, false)
|
||||
listener: beginBlockFunctionBody({)
|
||||
notEofOrValue(}, switch)
|
||||
parseStatement({)
|
||||
parseStatementX({)
|
||||
parseSwitchStatement({)
|
||||
listener: beginSwitchStatement(switch)
|
||||
ensureParenthesizedCondition(switch, allowCase: false)
|
||||
parseExpressionInParenthesisRest((, allowCase: false)
|
||||
parseExpression(()
|
||||
looksLikeOuterPatternEquals(()
|
||||
skipOuterPattern(()
|
||||
skipObjectPatternRest(x)
|
||||
parsePrecedenceExpression((, 1, true, ConstantPatternContext.none)
|
||||
parseUnaryExpression((, true, ConstantPatternContext.none)
|
||||
parsePrimary((, expression, ConstantPatternContext.none)
|
||||
parseSendOrFunctionLiteral((, expression, ConstantPatternContext.none)
|
||||
parseSend((, expression, ConstantPatternContext.none)
|
||||
isNextIdentifier(()
|
||||
ensureIdentifier((, expression)
|
||||
listener: handleIdentifier(x, expression)
|
||||
listener: handleNoTypeArguments())
|
||||
parseArgumentsOpt(x)
|
||||
listener: handleNoArguments())
|
||||
listener: handleSend(x, ))
|
||||
ensureCloseParen(x, ()
|
||||
listener: handleParenthesizedCondition((, null, null)
|
||||
parseSwitchBlock())
|
||||
ensureBlock(), null, switch statement)
|
||||
listener: beginSwitchBlock({)
|
||||
notEofOrValue(}, case)
|
||||
peekPastLabels(case)
|
||||
listener: beginCaseExpression(case)
|
||||
parsePattern(case, PatternContext.matching, precedence: 1)
|
||||
listener: beginPattern(case)
|
||||
parsePrimaryPattern(case, PatternContext.matching)
|
||||
parseParenthesizedPatternOrRecordPattern(case, PatternContext.matching)
|
||||
parsePattern((, PatternContext.matching, precedence: 1)
|
||||
listener: beginPattern(()
|
||||
parsePrimaryPattern((, PatternContext.matching)
|
||||
listener: beginConstantPattern(null)
|
||||
parsePrecedenceExpression((, 7, false, ConstantPatternContext.implicit)
|
||||
parseUnaryExpression((, false, ConstantPatternContext.implicit)
|
||||
parsePrimary((, expression, ConstantPatternContext.implicit)
|
||||
inPlainSync()
|
||||
parseSend((, expression, ConstantPatternContext.implicit)
|
||||
isNextIdentifier(()
|
||||
ensureIdentifier((, expression)
|
||||
reportRecoverableErrorWithToken(if, Instance of 'Template<(Token) => Message>')
|
||||
listener: handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
rewriter()
|
||||
listener: handleIdentifier(, expression)
|
||||
listener: handleNoTypeArguments(if)
|
||||
parseArgumentsOpt()
|
||||
listener: handleNoArguments(if)
|
||||
listener: handleSend(, if)
|
||||
listener: endConstantPattern(null)
|
||||
listener: endPattern()
|
||||
ensureCloseParen(, ()
|
||||
reportRecoverableError(if, Message[ExpectedButGot, Expected ')' before this., null, {string: )}])
|
||||
listener: handleRecoverableError(Message[ExpectedButGot, Expected ')' before this., null, {string: )}], if, if)
|
||||
listener: handleParenthesizedPattern(()
|
||||
listener: endPattern())
|
||||
listener: handleSwitchCaseNoWhenClause())
|
||||
ensureColon())
|
||||
listener: endCaseExpression(case, null, :)
|
||||
peekPastLabels(})
|
||||
parseStatementsInSwitchCase(:, }, case, 0, 1, null, null)
|
||||
listener: beginSwitchCase(0, 1, case)
|
||||
listener: endSwitchCase(0, 1, null, null, 0, case, })
|
||||
notEofOrValue(}, })
|
||||
listener: endSwitchBlock(1, {, })
|
||||
listener: endSwitchStatement(switch, })
|
||||
notEofOrValue(}, ;)
|
||||
parseStatement(})
|
||||
parseStatementX(})
|
||||
parseEmptyStatement(})
|
||||
listener: handleEmptyStatement(;)
|
||||
notEofOrValue(}, })
|
||||
listener: endBlockFunctionBody(2, {, })
|
||||
listener: endTopLevelMethod(void, null, })
|
||||
listener: endTopLevelDeclaration()
|
||||
reportAllErrorTokens(void)
|
||||
listener: endCompilationUnit(1, )
|
||||
|
|
@ -0,0 +1,15 @@
|
|||
NOTICE: Stream was rewritten by parser!
|
||||
|
||||
void f(Object? x) {
|
||||
switch (x) {
|
||||
case (*synthetic*if):
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
void[KeywordToken] f[StringToken]([BeginToken]Object[StringToken]?[SimpleToken] x[StringToken])[SimpleToken] {[BeginToken]
|
||||
switch[KeywordToken] ([BeginToken]x[StringToken])[SimpleToken] {[BeginToken]
|
||||
case[KeywordToken] ([BeginToken][SyntheticStringToken]if[KeywordToken])[SimpleToken]:[SimpleToken]
|
||||
}[SimpleToken];[SimpleToken]
|
||||
}[SimpleToken]
|
||||
[SimpleToken]
|
||||
|
|
@ -0,0 +1,13 @@
|
|||
void f(Object? x) {
|
||||
switch (x) {
|
||||
case (if):
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
void[KeywordToken] f[StringToken]([BeginToken]Object[StringToken]?[SimpleToken] x[StringToken])[SimpleToken] {[BeginToken]
|
||||
switch[KeywordToken] ([BeginToken]x[StringToken])[SimpleToken] {[BeginToken]
|
||||
case[KeywordToken] ([BeginToken]if[KeywordToken])[SimpleToken]:[SimpleToken]
|
||||
}[SimpleToken];[SimpleToken]
|
||||
}[SimpleToken]
|
||||
[SimpleToken]
|
||||
|
|
@ -0,0 +1,5 @@
|
|||
void f(Object? x) {
|
||||
switch (x) {
|
||||
case (_, if):
|
||||
};
|
||||
}
|
||||
|
|
@ -0,0 +1,69 @@
|
|||
Problems reported:
|
||||
|
||||
parser/patterns/syntheticIdentifier_insideRecordPattern:3:14: Expected an identifier, but got 'if'.
|
||||
case (_, if):
|
||||
^^
|
||||
|
||||
parser/patterns/syntheticIdentifier_insideRecordPattern:3:14: Expected ')' before this.
|
||||
case (_, if):
|
||||
^^
|
||||
|
||||
beginCompilationUnit(void)
|
||||
beginMetadataStar(void)
|
||||
endMetadataStar(0)
|
||||
beginTopLevelMember(void)
|
||||
beginTopLevelMethod(, null, null)
|
||||
handleVoidKeyword(void)
|
||||
handleIdentifier(f, topLevelFunctionDeclaration)
|
||||
handleNoTypeVariables(()
|
||||
beginFormalParameters((, MemberKind.TopLevelMethod)
|
||||
beginMetadataStar(Object)
|
||||
endMetadataStar(0)
|
||||
beginFormalParameter(Object, MemberKind.TopLevelMethod, null, null, null)
|
||||
handleIdentifier(Object, typeReference)
|
||||
handleNoTypeArguments(?)
|
||||
handleType(Object, ?)
|
||||
handleIdentifier(x, formalParameterDeclaration)
|
||||
handleFormalParameterWithoutValue())
|
||||
endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
|
||||
endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
|
||||
handleAsyncModifier(null, null)
|
||||
beginBlockFunctionBody({)
|
||||
beginSwitchStatement(switch)
|
||||
handleIdentifier(x, expression)
|
||||
handleNoTypeArguments())
|
||||
handleNoArguments())
|
||||
handleSend(x, ))
|
||||
handleParenthesizedCondition((, null, null)
|
||||
beginSwitchBlock({)
|
||||
beginCaseExpression(case)
|
||||
beginPattern(case)
|
||||
beginPattern(()
|
||||
handleNoType(_)
|
||||
handleWildcardPattern(null, _)
|
||||
endPattern(_)
|
||||
handlePatternField(null)
|
||||
beginPattern(,)
|
||||
beginConstantPattern(null)
|
||||
handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
handleIdentifier(, expression)
|
||||
handleNoTypeArguments(if)
|
||||
handleNoArguments(if)
|
||||
handleSend(, if)
|
||||
endConstantPattern(null)
|
||||
endPattern()
|
||||
handlePatternField(null)
|
||||
handleRecoverableError(Message[ExpectedButGot, Expected ')' before this., null, {string: )}], if, if)
|
||||
handleRecordPattern((, 2)
|
||||
endPattern())
|
||||
handleSwitchCaseNoWhenClause())
|
||||
endCaseExpression(case, null, :)
|
||||
beginSwitchCase(0, 1, case)
|
||||
endSwitchCase(0, 1, null, null, 0, case, })
|
||||
endSwitchBlock(1, {, })
|
||||
endSwitchStatement(switch, })
|
||||
handleEmptyStatement(;)
|
||||
endBlockFunctionBody(2, {, })
|
||||
endTopLevelMethod(void, null, })
|
||||
endTopLevelDeclaration()
|
||||
endCompilationUnit(1, )
|
||||
|
|
@ -0,0 +1,130 @@
|
|||
parseUnit(void)
|
||||
skipErrorTokens(void)
|
||||
listener: beginCompilationUnit(void)
|
||||
syntheticPreviousToken(void)
|
||||
parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
|
||||
parseMetadataStar()
|
||||
listener: beginMetadataStar(void)
|
||||
listener: endMetadataStar(0)
|
||||
parseTopLevelMemberImpl()
|
||||
listener: beginTopLevelMember(void)
|
||||
parseTopLevelMethod(, null, null, , Instance of 'VoidType', null, f, false)
|
||||
listener: beginTopLevelMethod(, null, null)
|
||||
listener: handleVoidKeyword(void)
|
||||
ensureIdentifierPotentiallyRecovered(void, topLevelFunctionDeclaration, false)
|
||||
listener: handleIdentifier(f, topLevelFunctionDeclaration)
|
||||
parseMethodTypeVar(f)
|
||||
listener: handleNoTypeVariables(()
|
||||
parseGetterOrFormalParameters(f, f, false, MemberKind.TopLevelMethod)
|
||||
parseFormalParameters(f, MemberKind.TopLevelMethod)
|
||||
parseFormalParametersRest((, MemberKind.TopLevelMethod)
|
||||
listener: beginFormalParameters((, MemberKind.TopLevelMethod)
|
||||
parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
|
||||
parseMetadataStar(()
|
||||
listener: beginMetadataStar(Object)
|
||||
listener: endMetadataStar(0)
|
||||
listener: beginFormalParameter(Object, MemberKind.TopLevelMethod, null, null, null)
|
||||
listener: handleIdentifier(Object, typeReference)
|
||||
listener: handleNoTypeArguments(?)
|
||||
listener: handleType(Object, ?)
|
||||
ensureIdentifier(?, formalParameterDeclaration)
|
||||
listener: handleIdentifier(x, formalParameterDeclaration)
|
||||
listener: handleFormalParameterWithoutValue())
|
||||
listener: endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
|
||||
listener: endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
|
||||
parseAsyncModifierOpt())
|
||||
listener: handleAsyncModifier(null, null)
|
||||
inPlainSync()
|
||||
parseFunctionBody(), false, false)
|
||||
listener: beginBlockFunctionBody({)
|
||||
notEofOrValue(}, switch)
|
||||
parseStatement({)
|
||||
parseStatementX({)
|
||||
parseSwitchStatement({)
|
||||
listener: beginSwitchStatement(switch)
|
||||
ensureParenthesizedCondition(switch, allowCase: false)
|
||||
parseExpressionInParenthesisRest((, allowCase: false)
|
||||
parseExpression(()
|
||||
looksLikeOuterPatternEquals(()
|
||||
skipOuterPattern(()
|
||||
skipObjectPatternRest(x)
|
||||
parsePrecedenceExpression((, 1, true, ConstantPatternContext.none)
|
||||
parseUnaryExpression((, true, ConstantPatternContext.none)
|
||||
parsePrimary((, expression, ConstantPatternContext.none)
|
||||
parseSendOrFunctionLiteral((, expression, ConstantPatternContext.none)
|
||||
parseSend((, expression, ConstantPatternContext.none)
|
||||
isNextIdentifier(()
|
||||
ensureIdentifier((, expression)
|
||||
listener: handleIdentifier(x, expression)
|
||||
listener: handleNoTypeArguments())
|
||||
parseArgumentsOpt(x)
|
||||
listener: handleNoArguments())
|
||||
listener: handleSend(x, ))
|
||||
ensureCloseParen(x, ()
|
||||
listener: handleParenthesizedCondition((, null, null)
|
||||
parseSwitchBlock())
|
||||
ensureBlock(), null, switch statement)
|
||||
listener: beginSwitchBlock({)
|
||||
notEofOrValue(}, case)
|
||||
peekPastLabels(case)
|
||||
listener: beginCaseExpression(case)
|
||||
parsePattern(case, PatternContext.matching, precedence: 1)
|
||||
listener: beginPattern(case)
|
||||
parsePrimaryPattern(case, PatternContext.matching)
|
||||
parseParenthesizedPatternOrRecordPattern(case, PatternContext.matching)
|
||||
parsePattern((, PatternContext.matching, precedence: 1)
|
||||
listener: beginPattern(()
|
||||
parsePrimaryPattern((, PatternContext.matching)
|
||||
parseVariablePattern((, PatternContext.matching, typeInfo: Instance of 'NoType')
|
||||
listener: handleNoType(_)
|
||||
listener: handleWildcardPattern(null, _)
|
||||
listener: endPattern(_)
|
||||
listener: handlePatternField(null)
|
||||
parsePattern(,, PatternContext.matching, precedence: 1)
|
||||
listener: beginPattern(,)
|
||||
parsePrimaryPattern(,, PatternContext.matching)
|
||||
listener: beginConstantPattern(null)
|
||||
parsePrecedenceExpression(,, 7, false, ConstantPatternContext.implicit)
|
||||
parseUnaryExpression(,, false, ConstantPatternContext.implicit)
|
||||
parsePrimary(,, expression, ConstantPatternContext.implicit)
|
||||
inPlainSync()
|
||||
parseSend(,, expression, ConstantPatternContext.implicit)
|
||||
isNextIdentifier(,)
|
||||
ensureIdentifier(,, expression)
|
||||
reportRecoverableErrorWithToken(if, Instance of 'Template<(Token) => Message>')
|
||||
listener: handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
rewriter()
|
||||
listener: handleIdentifier(, expression)
|
||||
listener: handleNoTypeArguments(if)
|
||||
parseArgumentsOpt()
|
||||
listener: handleNoArguments(if)
|
||||
listener: handleSend(, if)
|
||||
listener: endConstantPattern(null)
|
||||
listener: endPattern()
|
||||
listener: handlePatternField(null)
|
||||
ensureCloseParen(, ()
|
||||
reportRecoverableError(if, Message[ExpectedButGot, Expected ')' before this., null, {string: )}])
|
||||
listener: handleRecoverableError(Message[ExpectedButGot, Expected ')' before this., null, {string: )}], if, if)
|
||||
listener: handleRecordPattern((, 2)
|
||||
listener: endPattern())
|
||||
listener: handleSwitchCaseNoWhenClause())
|
||||
ensureColon())
|
||||
listener: endCaseExpression(case, null, :)
|
||||
peekPastLabels(})
|
||||
parseStatementsInSwitchCase(:, }, case, 0, 1, null, null)
|
||||
listener: beginSwitchCase(0, 1, case)
|
||||
listener: endSwitchCase(0, 1, null, null, 0, case, })
|
||||
notEofOrValue(}, })
|
||||
listener: endSwitchBlock(1, {, })
|
||||
listener: endSwitchStatement(switch, })
|
||||
notEofOrValue(}, ;)
|
||||
parseStatement(})
|
||||
parseStatementX(})
|
||||
parseEmptyStatement(})
|
||||
listener: handleEmptyStatement(;)
|
||||
notEofOrValue(}, })
|
||||
listener: endBlockFunctionBody(2, {, })
|
||||
listener: endTopLevelMethod(void, null, })
|
||||
listener: endTopLevelDeclaration()
|
||||
reportAllErrorTokens(void)
|
||||
listener: endCompilationUnit(1, )
|
||||
|
|
@ -0,0 +1,15 @@
|
|||
NOTICE: Stream was rewritten by parser!
|
||||
|
||||
void f(Object? x) {
|
||||
switch (x) {
|
||||
case (_, *synthetic*if):
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
void[KeywordToken] f[StringToken]([BeginToken]Object[StringToken]?[SimpleToken] x[StringToken])[SimpleToken] {[BeginToken]
|
||||
switch[KeywordToken] ([BeginToken]x[StringToken])[SimpleToken] {[BeginToken]
|
||||
case[KeywordToken] ([BeginToken]_[StringToken],[SimpleToken] [SyntheticStringToken]if[KeywordToken])[SimpleToken]:[SimpleToken]
|
||||
}[SimpleToken];[SimpleToken]
|
||||
}[SimpleToken]
|
||||
[SimpleToken]
|
||||
|
|
@ -0,0 +1,13 @@
|
|||
void f(Object? x) {
|
||||
switch (x) {
|
||||
case (_, if):
|
||||
};
|
||||
}
|
||||
|
||||
|
||||
void[KeywordToken] f[StringToken]([BeginToken]Object[StringToken]?[SimpleToken] x[StringToken])[SimpleToken] {[BeginToken]
|
||||
switch[KeywordToken] ([BeginToken]x[StringToken])[SimpleToken] {[BeginToken]
|
||||
case[KeywordToken] ([BeginToken]_[StringToken],[SimpleToken] if[KeywordToken])[SimpleToken]:[SimpleToken]
|
||||
}[SimpleToken];[SimpleToken]
|
||||
}[SimpleToken]
|
||||
[SimpleToken]
|
||||
|
|
@ -0,0 +1 @@
|
|||
void f(Object? x) => switch (x) {if};
|
||||
|
|
@ -0,0 +1,70 @@
|
|||
Problems reported:
|
||||
|
||||
parser/patterns/syntheticIdentifier_insideSwitchExpression:1:34: Expected an identifier, but got 'if'.
|
||||
void f(Object? x) => switch (x) {if};
|
||||
^^
|
||||
|
||||
parser/patterns/syntheticIdentifier_insideSwitchExpression:1:34: Expected '=>' before this.
|
||||
void f(Object? x) => switch (x) {if};
|
||||
^^
|
||||
|
||||
parser/patterns/syntheticIdentifier_insideSwitchExpression:1:34: Expected an identifier, but got 'if'.
|
||||
void f(Object? x) => switch (x) {if};
|
||||
^^
|
||||
|
||||
parser/patterns/syntheticIdentifier_insideSwitchExpression:1:34: Expected '}' before this.
|
||||
void f(Object? x) => switch (x) {if};
|
||||
^^
|
||||
|
||||
beginCompilationUnit(void)
|
||||
beginMetadataStar(void)
|
||||
endMetadataStar(0)
|
||||
beginTopLevelMember(void)
|
||||
beginTopLevelMethod(, null, null)
|
||||
handleVoidKeyword(void)
|
||||
handleIdentifier(f, topLevelFunctionDeclaration)
|
||||
handleNoTypeVariables(()
|
||||
beginFormalParameters((, MemberKind.TopLevelMethod)
|
||||
beginMetadataStar(Object)
|
||||
endMetadataStar(0)
|
||||
beginFormalParameter(Object, MemberKind.TopLevelMethod, null, null, null)
|
||||
handleIdentifier(Object, typeReference)
|
||||
handleNoTypeArguments(?)
|
||||
handleType(Object, ?)
|
||||
handleIdentifier(x, formalParameterDeclaration)
|
||||
handleFormalParameterWithoutValue())
|
||||
endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
|
||||
endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
|
||||
handleAsyncModifier(null, null)
|
||||
beginSwitchExpression(switch)
|
||||
handleIdentifier(x, expression)
|
||||
handleNoTypeArguments())
|
||||
handleNoArguments())
|
||||
handleSend(x, ))
|
||||
handleParenthesizedCondition((, null, null)
|
||||
beginSwitchExpressionBlock({)
|
||||
beginSwitchExpressionCase()
|
||||
beginPattern({)
|
||||
beginConstantPattern(null)
|
||||
handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
handleIdentifier(, expression)
|
||||
handleNoTypeArguments(if)
|
||||
handleNoArguments(if)
|
||||
handleSend(, if)
|
||||
endConstantPattern(null)
|
||||
endPattern()
|
||||
handleSwitchExpressionCasePattern()
|
||||
handleRecoverableError(Message[ExpectedButGot, Expected '=>' before this., null, {string: =>}], if, if)
|
||||
handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
handleIdentifier(, expression)
|
||||
handleNoTypeArguments(if)
|
||||
handleNoArguments(if)
|
||||
handleSend(, if)
|
||||
endSwitchExpressionCase(null, =>, )
|
||||
handleRecoverableError(Message[ExpectedButGot, Expected '}' before this., null, {string: }}], if, if)
|
||||
endSwitchExpressionBlock(1, {, })
|
||||
endSwitchExpression(switch, })
|
||||
handleExpressionFunctionBody(=>, ;)
|
||||
endTopLevelMethod(void, null, ;)
|
||||
endTopLevelDeclaration()
|
||||
endCompilationUnit(1, )
|
||||
|
|
@ -0,0 +1,129 @@
|
|||
parseUnit(void)
|
||||
skipErrorTokens(void)
|
||||
listener: beginCompilationUnit(void)
|
||||
syntheticPreviousToken(void)
|
||||
parseTopLevelDeclarationImpl(, Instance of 'DirectiveContext')
|
||||
parseMetadataStar()
|
||||
listener: beginMetadataStar(void)
|
||||
listener: endMetadataStar(0)
|
||||
parseTopLevelMemberImpl()
|
||||
listener: beginTopLevelMember(void)
|
||||
parseTopLevelMethod(, null, null, , Instance of 'VoidType', null, f, false)
|
||||
listener: beginTopLevelMethod(, null, null)
|
||||
listener: handleVoidKeyword(void)
|
||||
ensureIdentifierPotentiallyRecovered(void, topLevelFunctionDeclaration, false)
|
||||
listener: handleIdentifier(f, topLevelFunctionDeclaration)
|
||||
parseMethodTypeVar(f)
|
||||
listener: handleNoTypeVariables(()
|
||||
parseGetterOrFormalParameters(f, f, false, MemberKind.TopLevelMethod)
|
||||
parseFormalParameters(f, MemberKind.TopLevelMethod)
|
||||
parseFormalParametersRest((, MemberKind.TopLevelMethod)
|
||||
listener: beginFormalParameters((, MemberKind.TopLevelMethod)
|
||||
parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
|
||||
parseMetadataStar(()
|
||||
listener: beginMetadataStar(Object)
|
||||
listener: endMetadataStar(0)
|
||||
listener: beginFormalParameter(Object, MemberKind.TopLevelMethod, null, null, null)
|
||||
listener: handleIdentifier(Object, typeReference)
|
||||
listener: handleNoTypeArguments(?)
|
||||
listener: handleType(Object, ?)
|
||||
ensureIdentifier(?, formalParameterDeclaration)
|
||||
listener: handleIdentifier(x, formalParameterDeclaration)
|
||||
listener: handleFormalParameterWithoutValue())
|
||||
listener: endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
|
||||
listener: endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
|
||||
parseAsyncModifierOpt())
|
||||
listener: handleAsyncModifier(null, null)
|
||||
inPlainSync()
|
||||
parseFunctionBody(), false, false)
|
||||
parseExpressionFunctionBody(=>, false)
|
||||
parseExpression(=>)
|
||||
looksLikeOuterPatternEquals(=>)
|
||||
skipOuterPattern(=>)
|
||||
parsePrecedenceExpression(=>, 1, true, ConstantPatternContext.none)
|
||||
parseUnaryExpression(=>, true, ConstantPatternContext.none)
|
||||
parsePrimary(=>, expression, ConstantPatternContext.none)
|
||||
inPlainSync()
|
||||
parseSwitchExpression(=>)
|
||||
listener: beginSwitchExpression(switch)
|
||||
ensureParenthesizedCondition(switch, allowCase: false)
|
||||
parseExpressionInParenthesisRest((, allowCase: false)
|
||||
parseExpression(()
|
||||
looksLikeOuterPatternEquals(()
|
||||
skipOuterPattern(()
|
||||
skipObjectPatternRest(x)
|
||||
parsePrecedenceExpression((, 1, true, ConstantPatternContext.none)
|
||||
parseUnaryExpression((, true, ConstantPatternContext.none)
|
||||
parsePrimary((, expression, ConstantPatternContext.none)
|
||||
parseSendOrFunctionLiteral((, expression, ConstantPatternContext.none)
|
||||
parseSend((, expression, ConstantPatternContext.none)
|
||||
isNextIdentifier(()
|
||||
ensureIdentifier((, expression)
|
||||
listener: handleIdentifier(x, expression)
|
||||
listener: handleNoTypeArguments())
|
||||
parseArgumentsOpt(x)
|
||||
listener: handleNoArguments())
|
||||
listener: handleSend(x, ))
|
||||
ensureCloseParen(x, ()
|
||||
listener: handleParenthesizedCondition((, null, null)
|
||||
ensureBlock(), null, switch expression)
|
||||
listener: beginSwitchExpressionBlock({)
|
||||
listener: beginSwitchExpressionCase()
|
||||
parsePattern({, PatternContext.matching, precedence: 1)
|
||||
listener: beginPattern({)
|
||||
parsePrimaryPattern({, PatternContext.matching)
|
||||
listener: beginConstantPattern(null)
|
||||
parsePrecedenceExpression({, 7, false, ConstantPatternContext.implicit)
|
||||
parseUnaryExpression({, false, ConstantPatternContext.implicit)
|
||||
parsePrimary({, expression, ConstantPatternContext.implicit)
|
||||
inPlainSync()
|
||||
parseSend({, expression, ConstantPatternContext.implicit)
|
||||
isNextIdentifier({)
|
||||
ensureIdentifier({, expression)
|
||||
reportRecoverableErrorWithToken(if, Instance of 'Template<(Token) => Message>')
|
||||
listener: handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
rewriter()
|
||||
listener: handleIdentifier(, expression)
|
||||
listener: handleNoTypeArguments(if)
|
||||
parseArgumentsOpt()
|
||||
listener: handleNoArguments(if)
|
||||
listener: handleSend(, if)
|
||||
listener: endConstantPattern(null)
|
||||
listener: endPattern()
|
||||
listener: handleSwitchExpressionCasePattern()
|
||||
ensureFunctionArrow()
|
||||
rewriteAndRecover(, Message[ExpectedButGot, Expected '=>' before this., null, {string: =>}], =>)
|
||||
reportRecoverableError(if, Message[ExpectedButGot, Expected '=>' before this., null, {string: =>}])
|
||||
listener: handleRecoverableError(Message[ExpectedButGot, Expected '=>' before this., null, {string: =>}], if, if)
|
||||
rewriter()
|
||||
parseExpression(=>)
|
||||
looksLikeOuterPatternEquals(=>)
|
||||
skipOuterPattern(=>)
|
||||
parsePrecedenceExpression(=>, 1, true, ConstantPatternContext.none)
|
||||
parseUnaryExpression(=>, true, ConstantPatternContext.none)
|
||||
parsePrimary(=>, expression, ConstantPatternContext.none)
|
||||
inPlainSync()
|
||||
parseSend(=>, expression, ConstantPatternContext.none)
|
||||
isNextIdentifier(=>)
|
||||
ensureIdentifier(=>, expression)
|
||||
reportRecoverableErrorWithToken(if, Instance of 'Template<(Token) => Message>')
|
||||
listener: handleRecoverableError(Message[ExpectedIdentifier, Expected an identifier, but got 'if'., Try inserting an identifier before 'if'., {lexeme: if}], if, if)
|
||||
rewriter()
|
||||
listener: handleIdentifier(, expression)
|
||||
listener: handleNoTypeArguments(if)
|
||||
parseArgumentsOpt()
|
||||
listener: handleNoArguments(if)
|
||||
listener: handleSend(, if)
|
||||
listener: endSwitchExpressionCase(null, =>, )
|
||||
findNextCommaOrSemicolon(if, })
|
||||
reportRecoverableError(if, Message[ExpectedButGot, Expected '}' before this., null, {string: }}])
|
||||
listener: handleRecoverableError(Message[ExpectedButGot, Expected '}' before this., null, {string: }}], if, if)
|
||||
listener: endSwitchExpressionBlock(1, {, })
|
||||
listener: endSwitchExpression(switch, })
|
||||
ensureSemicolon(})
|
||||
listener: handleExpressionFunctionBody(=>, ;)
|
||||
inGenerator()
|
||||
listener: endTopLevelMethod(void, null, ;)
|
||||
listener: endTopLevelDeclaration()
|
||||
reportAllErrorTokens(void)
|
||||
listener: endCompilationUnit(1, )
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
NOTICE: Stream was rewritten by parser!
|
||||
|
||||
void f(Object? x) => switch (x) {*synthetic*=>*synthetic*if};
|
||||
|
||||
|
||||
void[KeywordToken] f[StringToken]([BeginToken]Object[StringToken]?[SimpleToken] x[StringToken])[SimpleToken] =>[SimpleToken] switch[KeywordToken] ([BeginToken]x[StringToken])[SimpleToken] {[BeginToken][SyntheticStringToken]=>[SyntheticToken][SyntheticStringToken]if[KeywordToken]}[SimpleToken];[SimpleToken]
|
||||
[SimpleToken]
|
||||
|
|
@ -0,0 +1,5 @@
|
|||
void f(Object? x) => switch (x) {if};
|
||||
|
||||
|
||||
void[KeywordToken] f[StringToken]([BeginToken]Object[StringToken]?[SimpleToken] x[StringToken])[SimpleToken] =>[SimpleToken] switch[KeywordToken] ([BeginToken]x[StringToken])[SimpleToken] {[BeginToken]if[KeywordToken]}[SimpleToken];[SimpleToken]
|
||||
[SimpleToken]
|
||||
Loading…
Reference in a new issue