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Modify lex yaml output to elide FileStart/End in tests. #4433

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merged 8 commits into from
Oct 23, 2024
Merged

Modify lex yaml output to elide FileStart/End in tests. #4433

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c39e335
Modify lex yaml output to elide FileStart/End in tests.
jonmeow Oct 21, 2024
295952d
Update toolchain/lex/tokenized_buffer.h
jonmeow Oct 22, 2024
47c780f
pre-commit
jonmeow Oct 22, 2024
9268b81
pre-commit
jonmeow Oct 22, 2024
7782a39
Revert FileStart/FileEnd changes
jonmeow Oct 22, 2024
00a1066
Restore omit flag
jonmeow Oct 22, 2024
19c62c2
Extra autoupdate
jonmeow Oct 22, 2024
dce891f
Merge branch 'trunk' into lex-yaml-format
jonmeow Oct 23, 2024
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13 changes: 12 additions & 1 deletion toolchain/driver/compile_subcommand.cpp
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Expand Up @@ -176,6 +176,16 @@ Dump the tokens to stdout when lexed.
)""",
},
[&](auto& arg_b) { arg_b.Set(&dump_tokens); });

b.AddFlag(
{
.name = "omit-file-boundary-tokens",
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Any reason to keep the flag? I'd be happy at least making the omitted the default, or even removing the flag entirely.

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So that people get the actual representation by default.

.help = R"""(
For `--dump-tokens`, omit file start and end boundary tokens.
)""",
},
[&](auto& arg_b) { arg_b.Set(&omit_file_boundary_tokens); });

b.AddFlag(
{
.name = "dump-parse-tree",
Expand Down Expand Up @@ -356,7 +366,8 @@ class CompilationUnit {
[&] { tokens_ = Lex::Lex(value_stores_, *source_, *consumer_); });
if (options_.dump_tokens && IncludeInDumps()) {
consumer_->Flush();
driver_env_->output_stream << tokens_;
tokens_->Print(driver_env_->output_stream,
options_.omit_file_boundary_tokens);
}
if (mem_usage_) {
mem_usage_->Collect("tokens_", *tokens_);
Expand Down
1 change: 1 addition & 0 deletions toolchain/driver/compile_subcommand.h
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Expand Up @@ -45,6 +45,7 @@ struct CompileOptions {
bool force_obj_output = false;
bool dump_shared_values = false;
bool dump_tokens = false;
bool omit_file_boundary_tokens = false;
bool dump_parse_tree = false;
bool dump_raw_sem_ir = false;
bool dump_sem_ir = false;
Expand Down
32 changes: 17 additions & 15 deletions toolchain/lex/testdata/basic_syntax.carbon
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Expand Up @@ -2,29 +2,31 @@
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// Dump all tokens so that we include the file start and end.
// ARGS: compile --phase=lex --dump-tokens %s
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lex/testdata/basic_syntax.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lex/testdata/basic_syntax.carbon
// CHECK:STDOUT: - filename: basic_syntax.carbon
// CHECK:STDOUT: tokens: [
// CHECK:STDOUT: { index: 0, kind: 'FileStart', line: {{ *\d+}}, column: 1, indent: 1, spelling: '' },
// CHECK:STDOUT: tokens:
// CHECK:STDOUT: - { index: 0, kind: 'FileStart', line: {{ *\d+}}, column: 1, indent: 1, spelling: '' }

fn run(String program) {
// CHECK:STDOUT: { index: 1, kind: 'Fn', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'fn', has_leading_space: true },
// CHECK:STDOUT: { index: 2, kind: 'Identifier', line: {{ *}}[[@LINE-2]], column: 4, indent: 1, spelling: 'run', identifier: 0, has_leading_space: true },
// CHECK:STDOUT: { index: 3, kind: 'OpenParen', line: {{ *}}[[@LINE-3]], column: 7, indent: 1, spelling: '(', closing_token: 6 },
// CHECK:STDOUT: { index: 4, kind: 'StringTypeLiteral', line: {{ *}}[[@LINE-4]], column: 8, indent: 1, spelling: 'String' },
// CHECK:STDOUT: { index: 5, kind: 'Identifier', line: {{ *}}[[@LINE-5]], column: 15, indent: 1, spelling: 'program', identifier: 1, has_leading_space: true },
// CHECK:STDOUT: { index: 6, kind: 'CloseParen', line: {{ *}}[[@LINE-6]], column: 22, indent: 1, spelling: ')', opening_token: 3 },
// CHECK:STDOUT: { index: 7, kind: 'OpenCurlyBrace', line: {{ *}}[[@LINE-7]], column: 24, indent: 1, spelling: '{', closing_token: 11, has_leading_space: true },
// CHECK:STDOUT: - { index: 1, kind: 'Fn', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'fn', has_leading_space: true }
// CHECK:STDOUT: - { index: 2, kind: 'Identifier', line: {{ *}}[[@LINE-2]], column: 4, indent: 1, spelling: 'run', identifier: 0, has_leading_space: true }
// CHECK:STDOUT: - { index: 3, kind: 'OpenParen', line: {{ *}}[[@LINE-3]], column: 7, indent: 1, spelling: '(', closing_token: 6 }
// CHECK:STDOUT: - { index: 4, kind: 'StringTypeLiteral', line: {{ *}}[[@LINE-4]], column: 8, indent: 1, spelling: 'String' }
// CHECK:STDOUT: - { index: 5, kind: 'Identifier', line: {{ *}}[[@LINE-5]], column: 15, indent: 1, spelling: 'program', identifier: 1, has_leading_space: true }
// CHECK:STDOUT: - { index: 6, kind: 'CloseParen', line: {{ *}}[[@LINE-6]], column: 22, indent: 1, spelling: ')', opening_token: 3 }
// CHECK:STDOUT: - { index: 7, kind: 'OpenCurlyBrace', line: {{ *}}[[@LINE-7]], column: 24, indent: 1, spelling: '{', closing_token: 11, has_leading_space: true }
return True;
// CHECK:STDOUT: { index: 8, kind: 'Return', line: {{ *}}[[@LINE-1]], column: 3, indent: 3, spelling: 'return', has_leading_space: true },
// CHECK:STDOUT: { index: 9, kind: 'Identifier', line: {{ *}}[[@LINE-2]], column: 10, indent: 3, spelling: 'True', identifier: 2, has_leading_space: true },
// CHECK:STDOUT: { index: 10, kind: 'Semi', line: {{ *}}[[@LINE-3]], column: 14, indent: 3, spelling: ';' },
// CHECK:STDOUT: - { index: 8, kind: 'Return', line: {{ *}}[[@LINE-1]], column: 3, indent: 3, spelling: 'return', has_leading_space: true }
// CHECK:STDOUT: - { index: 9, kind: 'Identifier', line: {{ *}}[[@LINE-2]], column: 10, indent: 3, spelling: 'True', identifier: 2, has_leading_space: true }
// CHECK:STDOUT: - { index: 10, kind: 'Semi', line: {{ *}}[[@LINE-3]], column: 14, indent: 3, spelling: ';' }
}
// CHECK:STDOUT: { index: 11, kind: 'CloseCurlyBrace', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: '}', opening_token: 7, has_leading_space: true },
// CHECK:STDOUT: - { index: 11, kind: 'CloseCurlyBrace', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: '}', opening_token: 7, has_leading_space: true }

// CHECK:STDOUT: { index: 12, kind: 'FileEnd', line: {{ *}}[[@LINE+1]], column: {{ *\d+}}, indent: 1, spelling: '', has_leading_space: true },
// CHECK:STDOUT: ]
// CHECK:STDOUT: - { index: 12, kind: 'FileEnd', line: {{ *}}[[@LINE+0]], column: {{ *\d+}}, indent: 1, spelling: '', has_leading_space: true }
7 changes: 2 additions & 5 deletions toolchain/lex/testdata/fail_bad_comment_introducers.carbon
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Expand Up @@ -7,9 +7,6 @@
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/lex/testdata/fail_bad_comment_introducers.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/lex/testdata/fail_bad_comment_introducers.carbon
// CHECK:STDOUT: - filename: fail_bad_comment_introducers.carbon
// CHECK:STDOUT: tokens: [
// CHECK:STDOUT: { index: 0, kind: 'FileStart', line: {{ *\d+}}, column: 1, indent: 1, spelling: '' },
//

// Comments have to have whitespace after `//` currently.
Expand Down Expand Up @@ -58,5 +55,5 @@

// An extra un-indented comment line to anchor the end of the file checks.

// CHECK:STDOUT: { index: 1, kind: 'FileEnd', line: {{ *}}[[@LINE+1]], column: {{ *\d+}}, indent: 1, spelling: '', has_leading_space: true },
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_bad_comment_introducers.carbon
// CHECK:STDOUT: tokens:
7 changes: 2 additions & 5 deletions toolchain/lex/testdata/fail_bad_comment_introducers_mid_block_indent_change.carbon
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Expand Up @@ -34,9 +34,6 @@
// CHECK:STDERR: fail_bad_comment_introducers_mid_block_indent_change.carbon:[[@LINE-19]]:3: error(NoWhitespaceAfterCommentIntroducer): whitespace is required after '//'
// CHECK:STDERR: //abc
// CHECK:STDERR: ^
// CHECK:STDOUT: - filename: fail_bad_comment_introducers_mid_block_indent_change.carbon
// CHECK:STDOUT: tokens: [
// CHECK:STDOUT: { index: 0, kind: 'FileStart', line: {{ *\d+}}, column: 1, indent: 1, spelling: '' },

// CHECK:STDOUT: { index: 1, kind: 'FileEnd', line: {{ *}}[[@LINE+1]], column: {{ *\d+}}, indent: 1, spelling: '', has_leading_space: true },
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_bad_comment_introducers_mid_block_indent_change.carbon
// CHECK:STDOUT: tokens:
57 changes: 25 additions & 32 deletions toolchain/lex/testdata/fail_bad_raw_identifier.carbon
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Expand Up @@ -10,8 +10,7 @@

// --- fail_bad_raw_identifier.carbon
// CHECK:STDOUT: - filename: fail_bad_raw_identifier.carbon
// CHECK:STDOUT: tokens: [
// CHECK:STDOUT: { index: 0, kind: 'FileStart', line: {{ *\d+}}, column: 1, indent: 1, spelling: '' },
// CHECK:STDOUT: tokens:


// Missing the character after `#`.
Expand All @@ -20,87 +19,81 @@
// CHECK:STDERR: ^
// CHECK:STDERR:
r#
// CHECK:STDOUT: { index: 1, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true },
// CHECK:STDOUT: { index: 2, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: '#' },
// CHECK:STDOUT: - { index: 1, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true }
// CHECK:STDOUT: - { index: 2, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: '#' }

// Not a valid identifier.
// CHECK:STDERR: fail_bad_raw_identifier.carbon:[[@LINE+4]]:2: error(UnrecognizedCharacters): encountered unrecognized characters while parsing
// CHECK:STDERR: r#3
// CHECK:STDERR: ^
// CHECK:STDERR:
r#3
// CHECK:STDOUT: { index: 3, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true },
// CHECK:STDOUT: { index: 4, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: '#' },
// CHECK:STDOUT: { index: 5, kind: 'IntLiteral', line: {{ *}}[[@LINE-3]], column: 3, indent: 1, spelling: '3', value: `3` },
// CHECK:STDOUT: - { index: 3, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true }
// CHECK:STDOUT: - { index: 4, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: '#' }
// CHECK:STDOUT: - { index: 5, kind: 'IntLiteral', line: {{ *}}[[@LINE-3]], column: 3, indent: 1, spelling: '3', value: `3` }

// Non ascii start to identifier.
// CHECK:STDERR: fail_bad_raw_identifier.carbon:[[@LINE+4]]:2: error(UnrecognizedCharacters): encountered unrecognized characters while parsing
// CHECK:STDERR: r#á
// CHECK:STDERR: ^
// CHECK:STDERR:
r#á
// CHECK:STDOUT: { index: 6, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true },
// CHECK:STDOUT: { index: 7, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: '#á' },
// CHECK:STDOUT: - { index: 6, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true }
// CHECK:STDOUT: - { index: 7, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: '#á' }

// Raw `r` identifier doesn't start a second raw identifier.
// CHECK:STDERR: fail_bad_raw_identifier.carbon:[[@LINE+4]]:4: error(UnrecognizedCharacters): encountered unrecognized characters while parsing
// CHECK:STDERR: r#r#foo
// CHECK:STDERR: ^
// CHECK:STDERR:
r#r#foo
// CHECK:STDOUT: { index: 8, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true },
// CHECK:STDOUT: { index: 9, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 4, indent: 1, spelling: '#' },
// CHECK:STDOUT: { index: 10, kind: 'Identifier', line: {{ *}}[[@LINE-3]], column: 5, indent: 1, spelling: 'foo', identifier: 1 },
// CHECK:STDOUT: - { index: 8, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true }
// CHECK:STDOUT: - { index: 9, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 4, indent: 1, spelling: '#' }
// CHECK:STDOUT: - { index: 10, kind: 'Identifier', line: {{ *}}[[@LINE-3]], column: 5, indent: 1, spelling: 'foo', identifier: 1 }

// Other identifier characters don't start a raw identifier.
// CHECK:STDERR: fail_bad_raw_identifier.carbon:[[@LINE+4]]:2: error(UnrecognizedCharacters): encountered unrecognized characters while parsing
// CHECK:STDERR: s#foo
// CHECK:STDERR: ^
// CHECK:STDERR:
s#foo
// CHECK:STDOUT: { index: 11, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 's', identifier: 2, has_leading_space: true },
// CHECK:STDOUT: { index: 12, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: '#' },
// CHECK:STDOUT: { index: 13, kind: 'Identifier', line: {{ *}}[[@LINE-3]], column: 3, indent: 1, spelling: 'foo', identifier: 1 },
// CHECK:STDOUT: - { index: 11, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 's', identifier: 2, has_leading_space: true }
// CHECK:STDOUT: - { index: 12, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: '#' }
// CHECK:STDOUT: - { index: 13, kind: 'Identifier', line: {{ *}}[[@LINE-3]], column: 3, indent: 1, spelling: 'foo', identifier: 1 }

// Identifier ending in `r` doesn't start a raw identifier.
// CHECK:STDERR: fail_bad_raw_identifier.carbon:[[@LINE+4]]:4: error(UnrecognizedCharacters): encountered unrecognized characters while parsing
// CHECK:STDERR: arr#foo
// CHECK:STDERR: ^
// CHECK:STDERR:
arr#foo
// CHECK:STDOUT: { index: 14, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'arr', identifier: 3, has_leading_space: true },
// CHECK:STDOUT: { index: 15, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 4, indent: 1, spelling: '#' },
// CHECK:STDOUT: { index: 16, kind: 'Identifier', line: {{ *}}[[@LINE-3]], column: 5, indent: 1, spelling: 'foo', identifier: 1 },
// CHECK:STDOUT: - { index: 14, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'arr', identifier: 3, has_leading_space: true }
// CHECK:STDOUT: - { index: 15, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 4, indent: 1, spelling: '#' }
// CHECK:STDOUT: - { index: 16, kind: 'Identifier', line: {{ *}}[[@LINE-3]], column: 5, indent: 1, spelling: 'foo', identifier: 1 }

// Whitespace between `r` and `#` isn't allowed.
// CHECK:STDERR: fail_bad_raw_identifier.carbon:[[@LINE+4]]:3: error(UnrecognizedCharacters): encountered unrecognized characters while parsing
// CHECK:STDERR: r #foo
// CHECK:STDERR: ^
// CHECK:STDERR:
r #foo
// CHECK:STDOUT: { index: 17, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true },
// CHECK:STDOUT: { index: 18, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 3, indent: 1, spelling: '#', has_leading_space: true },
// CHECK:STDOUT: { index: 19, kind: 'Identifier', line: {{ *}}[[@LINE-3]], column: 4, indent: 1, spelling: 'foo', identifier: 1 },
// CHECK:STDOUT: - { index: 17, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true }
// CHECK:STDOUT: - { index: 18, kind: 'Error', line: {{ *}}[[@LINE-2]], column: 3, indent: 1, spelling: '#', has_leading_space: true }
// CHECK:STDOUT: - { index: 19, kind: 'Identifier', line: {{ *}}[[@LINE-3]], column: 4, indent: 1, spelling: 'foo', identifier: 1 }

// This is an `r` identifier followed by a string literal.
r#"hello"#
// CHECK:STDOUT: { index: 20, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true },
// CHECK:STDOUT: { index: 21, kind: 'StringLiteral', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: '#"hello"#', value: `hello` },
// CHECK:STDOUT: - { index: 20, kind: 'Identifier', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: 'r', identifier: 0, has_leading_space: true }
// CHECK:STDOUT: - { index: 21, kind: 'StringLiteral', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: '#"hello"#', value: `hello` }

// CHECK:STDOUT: { index: 22, kind: 'FileEnd', line: {{ *}}[[@LINE+1]], column: {{ *\d+}}, indent: 1, spelling: '', has_leading_space: true },
// CHECK:STDOUT: ]
// --- fail_hash_at_start_of_file.carbon
// CHECK:STDOUT: - filename: fail_hash_at_start_of_file.carbon
// CHECK:STDOUT: tokens: [
// CHECK:STDOUT: { index: 0, kind: 'FileStart', line: {{ *\d+}}, column: 1, indent: 1, spelling: '' },
// CHECK:STDOUT: tokens:

// Ensure that we correctly handle a `#` as the first token in the file.
// CHECK:STDERR: fail_hash_at_start_of_file.carbon:[[@LINE+3]]:1: error(UnrecognizedCharacters): encountered unrecognized characters while parsing
// CHECK:STDERR: #foo
// CHECK:STDERR: ^
#foo
// CHECK:STDOUT: { index: 1, kind: 'Error', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: '#', has_leading_space: true },
// CHECK:STDOUT: { index: 2, kind: 'Identifier', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: 'foo', identifier: 0 },

// CHECK:STDOUT: { index: 3, kind: 'FileEnd', line: {{ *}}[[@LINE+1]], column: {{ *\d+}}, indent: 1, spelling: '', has_leading_space: true },
// CHECK:STDOUT: ]
// CHECK:STDOUT: - { index: 1, kind: 'Error', line: {{ *}}[[@LINE-1]], column: 1, indent: 1, spelling: '#', has_leading_space: true }
// CHECK:STDOUT: - { index: 2, kind: 'Identifier', line: {{ *}}[[@LINE-2]], column: 2, indent: 1, spelling: 'foo', identifier: 0 }
20 changes: 8 additions & 12 deletions toolchain/lex/testdata/fail_block_string_second_line.carbon
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Expand Up @@ -17,15 +17,11 @@ var s: String = '''
// CHECK:STDERR: error here: '''
// CHECK:STDERR: ^
// CHECK:STDOUT: - filename: fail_block_string_second_line.carbon
// CHECK:STDOUT: tokens: [
// CHECK:STDOUT: { index: 0, kind: 'FileStart', line: {{ *\d+}}, column: 1, indent: 1, spelling: '' },
// CHECK:STDOUT: { index: 1, kind: 'Var', line: {{ *}}[[@LINE-17]], column: 1, indent: 1, spelling: 'var', has_leading_space: true },
// CHECK:STDOUT: { index: 2, kind: 'Identifier', line: {{ *}}[[@LINE-18]], column: 5, indent: 1, spelling: 's', identifier: 0, has_leading_space: true },
// CHECK:STDOUT: { index: 3, kind: 'Colon', line: {{ *}}[[@LINE-19]], column: 6, indent: 1, spelling: ':' },
// CHECK:STDOUT: { index: 4, kind: 'StringTypeLiteral', line: {{ *}}[[@LINE-20]], column: 8, indent: 1, spelling: 'String', has_leading_space: true },
// CHECK:STDOUT: { index: 5, kind: 'Equal', line: {{ *}}[[@LINE-21]], column: 15, indent: 1, spelling: '=', has_leading_space: true },
// CHECK:STDOUT: { index: 6, kind: 'StringLiteral', line: {{ *}}[[@LINE-22]], column: 17, indent: 1, spelling: ''''
// CHECK:STDOUT: error here: '''', value: `error here: `, has_leading_space: true },

// CHECK:STDOUT: { index: 7, kind: 'FileEnd', line: {{ *}}[[@LINE+1]], column: {{ *\d+}}, indent: 1, spelling: '', has_leading_space: true },
// CHECK:STDOUT: ]
// CHECK:STDOUT: tokens:
// CHECK:STDOUT: - { index: 1, kind: 'Var', line: {{ *}}[[@LINE-16]], column: 1, indent: 1, spelling: 'var', has_leading_space: true }
// CHECK:STDOUT: - { index: 2, kind: 'Identifier', line: {{ *}}[[@LINE-17]], column: 5, indent: 1, spelling: 's', identifier: 0, has_leading_space: true }
// CHECK:STDOUT: - { index: 3, kind: 'Colon', line: {{ *}}[[@LINE-18]], column: 6, indent: 1, spelling: ':' }
// CHECK:STDOUT: - { index: 4, kind: 'StringTypeLiteral', line: {{ *}}[[@LINE-19]], column: 8, indent: 1, spelling: 'String', has_leading_space: true }
// CHECK:STDOUT: - { index: 5, kind: 'Equal', line: {{ *}}[[@LINE-20]], column: 15, indent: 1, spelling: '=', has_leading_space: true }
// CHECK:STDOUT: - { index: 6, kind: 'StringLiteral', line: {{ *}}[[@LINE-21]], column: 17, indent: 1, spelling: ''''
// CHECK:STDOUT: error here: '''', value: `error here: `, has_leading_space: true }
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