mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Chandler Carruth
1b2eb42c5a
An invalid parse due to an error token isn't likely a great diagnostic as it will already have been diagnosed by the lexer. A common case to start handling that is when the parser encounters an invalid token when expecting an expression. This removes a number of unhelpful diagnostics after the lexer has done a good job diagnosing. This also means that there may be parse tree errors that aren't diagnosed when there are lexer-diagnosed errors, so track that. Follow-up to #4430 that almost finishes addressing its diagnostic TODO.
137 lines
6.7 KiB
Plaintext
137 lines
6.7 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/parse/testdata/array/fail_syntax.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/parse/testdata/array/fail_syntax.carbon
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// --- fail_type.carbon
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// CHECK:STDERR: fail_type.carbon:[[@LINE+4]]:12: error: expected `;` in array type [ExpectedArraySemi]
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// CHECK:STDERR: var x: [i32];
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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var x: [i32];
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// --- fail_invalid_char.carbon
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// CHECK:STDERR: fail_invalid_char.carbon:[[@LINE+16]]:12: error: expected expression [ExpectedExpr]
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// CHECK:STDERR: fn X() -> [:];
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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// CHECK:STDERR: fail_invalid_char.carbon:[[@LINE+12]]:12: error: expected `;` in array type [ExpectedArraySemi]
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// CHECK:STDERR: fn X() -> [:];
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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// CHECK:STDERR: fail_invalid_char.carbon:[[@LINE+8]]:12: error: expected expression [ExpectedExpr]
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// CHECK:STDERR: fn X() -> [:];
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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// CHECK:STDERR: fail_invalid_char.carbon:[[@LINE+4]]:12: error: unexpected tokens before `]` [ExpectedCloseSymbol]
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// CHECK:STDERR: fn X() -> [:];
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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fn X() -> [:];
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// --- fail_unlexed_expr.carbon
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// CHECK:STDERR: fail_unlexed_expr.carbon:[[@LINE+12]]:9: error: encountered unrecognized characters while parsing [UnrecognizedCharacters]
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// CHECK:STDERR: var y: [`];
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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// CHECK:STDERR: fail_unlexed_expr.carbon:[[@LINE+8]]:9: error: expected `;` in array type [ExpectedArraySemi]
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// CHECK:STDERR: var y: [`];
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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// CHECK:STDERR: fail_unlexed_expr.carbon:[[@LINE+4]]:9: error: unexpected tokens before `]` [ExpectedCloseSymbol]
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// CHECK:STDERR: var y: [`];
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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var y: [`];
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// --- fail_no_close_bracket.carbon
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// CHECK:STDERR: fail_no_close_bracket.carbon:[[@LINE+4]]:8: error: opening symbol without a corresponding closing symbol [UnmatchedOpening]
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// CHECK:STDERR: var x: [i32;;
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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var x: [i32;;
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// --- fail_no_semi.carbon
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// CHECK:STDERR: fail_no_semi.carbon:[[@LINE+3]]:12: error: expected `;` in array type [ExpectedArraySemi]
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// CHECK:STDERR: var x: [i32];
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// CHECK:STDERR: ^
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var x: [i32];
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// CHECK:STDOUT: - filename: fail_type.carbon
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// CHECK:STDOUT: parse_tree: [
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// CHECK:STDOUT: {kind: 'FileStart', text: ''},
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// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
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// CHECK:STDOUT: {kind: 'IdentifierName', text: 'x'},
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// CHECK:STDOUT: {kind: 'ArrayExprStart', text: '['},
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// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
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// CHECK:STDOUT: {kind: 'ArrayExprSemi', text: ']', has_error: yes, subtree_size: 3},
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// CHECK:STDOUT: {kind: 'ArrayExpr', text: ']', has_error: yes, subtree_size: 4},
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// CHECK:STDOUT: {kind: 'BindingPattern', text: ':', subtree_size: 6},
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// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 8},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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// CHECK:STDOUT: - filename: fail_invalid_char.carbon
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// CHECK:STDOUT: parse_tree: [
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// CHECK:STDOUT: {kind: 'FileStart', text: ''},
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// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
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// CHECK:STDOUT: {kind: 'IdentifierName', text: 'X'},
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// CHECK:STDOUT: {kind: 'TuplePatternStart', text: '('},
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// CHECK:STDOUT: {kind: 'TuplePattern', text: ')', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'ArrayExprStart', text: '['},
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// CHECK:STDOUT: {kind: 'InvalidParse', text: ':', has_error: yes},
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// CHECK:STDOUT: {kind: 'ArrayExprSemi', text: ':', has_error: yes, subtree_size: 3},
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// CHECK:STDOUT: {kind: 'InvalidParse', text: ':', has_error: yes},
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// CHECK:STDOUT: {kind: 'ArrayExpr', text: ']', has_error: yes, subtree_size: 5},
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// CHECK:STDOUT: {kind: 'ReturnType', text: '->', subtree_size: 6},
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// CHECK:STDOUT: {kind: 'FunctionDecl', text: ';', subtree_size: 11},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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// CHECK:STDOUT: - filename: fail_unlexed_expr.carbon
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// CHECK:STDOUT: parse_tree: [
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// CHECK:STDOUT: {kind: 'FileStart', text: ''},
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// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
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// CHECK:STDOUT: {kind: 'IdentifierName', text: 'y'},
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// CHECK:STDOUT: {kind: 'ArrayExprStart', text: '['},
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// CHECK:STDOUT: {kind: 'InvalidParse', text: '`', has_error: yes},
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// CHECK:STDOUT: {kind: 'ArrayExprSemi', text: '`', has_error: yes, subtree_size: 3},
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// CHECK:STDOUT: {kind: 'InvalidParse', text: '`', has_error: yes},
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// CHECK:STDOUT: {kind: 'ArrayExpr', text: ']', has_error: yes, subtree_size: 5},
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// CHECK:STDOUT: {kind: 'BindingPattern', text: ':', subtree_size: 7},
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// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 9},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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// CHECK:STDOUT: - filename: fail_no_close_bracket.carbon
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// CHECK:STDOUT: parse_tree: [
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// CHECK:STDOUT: {kind: 'FileStart', text: ''},
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// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
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// CHECK:STDOUT: {kind: 'IdentifierName', text: 'x'},
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// CHECK:STDOUT: {kind: 'InvalidParse', text: '[', has_error: yes},
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// CHECK:STDOUT: {kind: 'BindingPattern', text: ':', has_error: yes, subtree_size: 3},
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// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'EmptyDecl', text: ';'},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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// CHECK:STDOUT: - filename: fail_no_semi.carbon
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// CHECK:STDOUT: parse_tree: [
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// CHECK:STDOUT: {kind: 'FileStart', text: ''},
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// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
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// CHECK:STDOUT: {kind: 'IdentifierName', text: 'x'},
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// CHECK:STDOUT: {kind: 'ArrayExprStart', text: '['},
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// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
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// CHECK:STDOUT: {kind: 'ArrayExprSemi', text: ']', has_error: yes, subtree_size: 3},
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// CHECK:STDOUT: {kind: 'ArrayExpr', text: ']', has_error: yes, subtree_size: 4},
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// CHECK:STDOUT: {kind: 'BindingPattern', text: ':', subtree_size: 6},
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// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 8},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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