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https://github.com/carbon-language/carbon-lang.git
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Richard Smith
0a06fceb5f
Move handling of mismatched brackets out of the main lexing loop into a separate pass that is only run if there are mismatched brackets This is done in preparation for using both lookahead and lookbehind to work out how to match brackets, and to get this code far away from the hot lexing loop. Fix bracket insertion location to be immediately after the token that we're inserting the bracket after, rather than potentially at the end of a comment. When there are open brackets at the end of the file, say that there are open brackets, not that there's a closing bracket without a matching opening bracket.
39 lines
3.0 KiB
Plaintext
39 lines
3.0 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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// TODO: For this example, we should ideally report a missing `{` on the `if`
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// line, for example based on the indentation of the surrounding lines.
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fn F() {
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if (thing1)
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thing2;
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}
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}
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// The check lines are inserted at the end so that they don't disrupt the
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// indentation of lines in the text.
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// AUTOUPDATE
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// CHECK:STDERR: fail_mismatched_brackets_2.carbon:[[@LINE-5]]:1: ERROR: Closing symbol without a corresponding opening symbol.
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// CHECK:STDERR: }
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// CHECK:STDERR: ^
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// CHECK:STDOUT: - filename: fail_mismatched_brackets_2.carbon
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// CHECK:STDOUT: tokens: [
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// CHECK:STDOUT: { index: 0, kind: 'FileStart', line: {{ *\d+}}, column: 1, indent: 1, spelling: '', has_trailing_space: true },
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// CHECK:STDOUT: { index: 1, kind: 'Fn', line: {{ *}}[[@LINE-15]], column: 1, indent: 1, spelling: 'fn', has_trailing_space: true },
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// CHECK:STDOUT: { index: 2, kind: 'Identifier', line: {{ *}}[[@LINE-16]], column: 4, indent: 1, spelling: 'F', identifier: 0 },
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// CHECK:STDOUT: { index: 3, kind: 'OpenParen', line: {{ *}}[[@LINE-17]], column: 5, indent: 1, spelling: '(', closing_token: 4 },
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// CHECK:STDOUT: { index: 4, kind: 'CloseParen', line: {{ *}}[[@LINE-18]], column: 6, indent: 1, spelling: ')', opening_token: 3, has_trailing_space: true },
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// CHECK:STDOUT: { index: 5, kind: 'OpenCurlyBrace', line: {{ *}}[[@LINE-19]], column: 8, indent: 1, spelling: '{', closing_token: 12, has_trailing_space: true },
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// CHECK:STDOUT: { index: 6, kind: 'If', line: {{ *}}[[@LINE-19]], column: 3, indent: 3, spelling: 'if', has_trailing_space: true },
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// CHECK:STDOUT: { index: 7, kind: 'OpenParen', line: {{ *}}[[@LINE-20]], column: 6, indent: 3, spelling: '(', closing_token: 9 },
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// CHECK:STDOUT: { index: 8, kind: 'Identifier', line: {{ *}}[[@LINE-21]], column: 7, indent: 3, spelling: 'thing1', identifier: 1 },
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// CHECK:STDOUT: { index: 9, kind: 'CloseParen', line: {{ *}}[[@LINE-22]], column: 13, indent: 3, spelling: ')', opening_token: 7, has_trailing_space: true },
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// CHECK:STDOUT: { index: 10, kind: 'Identifier', line: {{ *}}[[@LINE-22]], column: 5, indent: 5, spelling: 'thing2', identifier: 2 },
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// CHECK:STDOUT: { index: 11, kind: 'Semi', line: {{ *}}[[@LINE-23]], column: 11, indent: 5, spelling: ';', has_trailing_space: true },
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// CHECK:STDOUT: { index: 12, kind: 'CloseCurlyBrace', line: {{ *}}[[@LINE-23]], column: 3, indent: 3, spelling: '}', opening_token: 5, has_trailing_space: true },
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// CHECK:STDOUT: { index: 13, kind: 'Error', line: {{ *}}[[@LINE-23]], column: 1, indent: 1, spelling: '}', has_trailing_space: true },
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// CHECK:STDOUT: { index: 14, kind: 'FileEnd', line: {{ *}}[[@LINE+1]], column: {{ *\d+}}, indent: 1, spelling: '' },
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// CHECK:STDOUT: ]
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