mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-28 18:24:53 +01:00
Geoff Romer
6429c1655c
It's hard to track 2-space indent levels across large vertical gaps, and it can be hard to suppress the instinct to read the dump as if it were preorder. This change introduces a new dump mode that addresses both problems by using box-drawing characters to explicitly represent the parent-child edges of the tree. This new mode is the default, but the old behavior remains available with `--parse-dump-format=yaml-postorder`.
138 lines
5.9 KiB
Plaintext
138 lines
5.9 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/let/expression_pattern_precedence.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/let/expression_pattern_precedence.carbon
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// --- parens.carbon
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fn F() {
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let (a == b) = c;
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let (a and b) = c;
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let (if true then 1 else 2) = 3;
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}
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// --- fail_relational.carbon
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fn G() {
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// CHECK:STDERR: fail_relational.carbon:[[@LINE+4]]:9: error: `let` declarations must end with a `;` [ExpectedDeclSemi]
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// CHECK:STDERR: let a == b = c;
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// CHECK:STDERR: ^~
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// CHECK:STDERR:
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let a == b = c;
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}
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// --- fail_logical.carbon
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fn H() {
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// CHECK:STDERR: fail_logical.carbon:[[@LINE+4]]:9: error: `let` declarations must end with a `;` [ExpectedDeclSemi]
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// CHECK:STDERR: let a and b = c;
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// CHECK:STDERR: ^~~
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// CHECK:STDERR:
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let a and b = c;
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}
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// --- fail_if.carbon
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fn I() {
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// CHECK:STDERR: fail_if.carbon:[[@LINE+4]]:7: error: parentheses are required around this unary `if` operator [UnaryOperatorRequiresParentheses]
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// CHECK:STDERR: let if true then 1 else 2 = 3;
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// CHECK:STDERR: ^~
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// CHECK:STDERR:
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let if true then 1 else 2 = 3;
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}
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// CHECK:STDOUT: - filename: parens.carbon
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// CHECK:STDOUT: ╭─FileStart ''
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// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
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// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'F'
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// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
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// CHECK:STDOUT: │ ├─ExplicitParamList ')'
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// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
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// CHECK:STDOUT: │ │ ╭─LetIntroducer 'let'
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// CHECK:STDOUT: │ │ │ ╭─TuplePatternStart '('
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// CHECK:STDOUT: │ │ │ │ ╭─IdentifierNameExpr 'a'
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// CHECK:STDOUT: │ │ │ │ ├─IdentifierNameExpr 'b'
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// CHECK:STDOUT: │ │ │ ├─InfixOperatorEqualEqual '=='
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// CHECK:STDOUT: │ │ ├─ParenPattern ')'
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// CHECK:STDOUT: │ │ ├─LetInitializer '='
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// CHECK:STDOUT: │ │ ├─IdentifierNameExpr 'c'
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// CHECK:STDOUT: │ ├─LetDecl ';'
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// CHECK:STDOUT: │ │ ╭─LetIntroducer 'let'
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// CHECK:STDOUT: │ │ │ ╭─TuplePatternStart '('
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// CHECK:STDOUT: │ │ │ │ ╭─IdentifierNameExpr 'a'
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// CHECK:STDOUT: │ │ │ │ ╭─ShortCircuitOperandAnd 'and'
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// CHECK:STDOUT: │ │ │ │ ├─IdentifierNameExpr 'b'
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// CHECK:STDOUT: │ │ │ ├─ShortCircuitOperatorAnd 'and'
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// CHECK:STDOUT: │ │ ├─ParenPattern ')'
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// CHECK:STDOUT: │ │ ├─LetInitializer '='
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// CHECK:STDOUT: │ │ ├─IdentifierNameExpr 'c'
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// CHECK:STDOUT: │ ├─LetDecl ';'
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// CHECK:STDOUT: │ │ ╭─LetIntroducer 'let'
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// CHECK:STDOUT: │ │ │ ╭─TuplePatternStart '('
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// CHECK:STDOUT: │ │ │ │ ╭─BoolLiteralTrue 'true'
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// CHECK:STDOUT: │ │ │ │ ╭─IfExprIf 'if'
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// CHECK:STDOUT: │ │ │ │ │ ╭─IntLiteral '1'
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// CHECK:STDOUT: │ │ │ │ ├─IfExprThen 'then'
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// CHECK:STDOUT: │ │ │ │ ├─IntLiteral '2'
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// CHECK:STDOUT: │ │ │ ├─IfExprElse 'else'
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// CHECK:STDOUT: │ │ ├─ParenPattern ')'
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// CHECK:STDOUT: │ │ ├─LetInitializer '='
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// CHECK:STDOUT: │ │ ├─IntLiteral '3'
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// CHECK:STDOUT: │ ├─LetDecl ';'
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// CHECK:STDOUT: ├─FunctionDefinition '}'
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// CHECK:STDOUT: ├─FileEnd ''
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// CHECK:STDOUT: (root)
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// CHECK:STDOUT: - filename: fail_relational.carbon
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// CHECK:STDOUT: ╭─FileStart ''
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// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
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// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'G'
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// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
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// CHECK:STDOUT: │ ├─ExplicitParamList ')'
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// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
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// CHECK:STDOUT: │ │ ╭─LetIntroducer 'let'
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// CHECK:STDOUT: │ │ ├─IdentifierNameExpr 'a'
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// CHECK:STDOUT: │ ├─LetDecl ';' has_error
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// CHECK:STDOUT: ├─FunctionDefinition '}'
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// CHECK:STDOUT: ├─FileEnd ''
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// CHECK:STDOUT: (root)
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// CHECK:STDOUT: - filename: fail_logical.carbon
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// CHECK:STDOUT: ╭─FileStart ''
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// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
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// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'H'
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// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
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// CHECK:STDOUT: │ ├─ExplicitParamList ')'
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// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
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// CHECK:STDOUT: │ │ ╭─LetIntroducer 'let'
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// CHECK:STDOUT: │ │ ├─IdentifierNameExpr 'a'
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// CHECK:STDOUT: │ ├─LetDecl ';' has_error
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// CHECK:STDOUT: ├─FunctionDefinition '}'
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// CHECK:STDOUT: ├─FileEnd ''
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// CHECK:STDOUT: (root)
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// CHECK:STDOUT: - filename: fail_if.carbon
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// CHECK:STDOUT: ╭─FileStart ''
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// CHECK:STDOUT: │ ╭─FunctionIntroducer 'fn'
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// CHECK:STDOUT: │ ├─IdentifierNameMaybeBeforeSignature 'I'
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// CHECK:STDOUT: │ │ ╭─ExplicitParamListStart '('
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// CHECK:STDOUT: │ ├─ExplicitParamList ')'
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// CHECK:STDOUT: │ ╭─FunctionDefinitionStart '{'
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// CHECK:STDOUT: │ │ ╭─LetIntroducer 'let'
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// CHECK:STDOUT: │ │ │ ╭─BoolLiteralTrue 'true'
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// CHECK:STDOUT: │ │ │ ╭─IfExprIf 'if'
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// CHECK:STDOUT: │ │ │ │ ╭─IntLiteral '1'
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// CHECK:STDOUT: │ │ │ ├─IfExprThen 'then'
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// CHECK:STDOUT: │ │ │ ├─IntLiteral '2'
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// CHECK:STDOUT: │ │ ├─IfExprElse 'else'
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// CHECK:STDOUT: │ │ ├─LetInitializer '='
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// CHECK:STDOUT: │ │ ├─IntLiteral '3'
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// CHECK:STDOUT: │ ├─LetDecl ';'
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// CHECK:STDOUT: ├─FunctionDefinition '}'
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// CHECK:STDOUT: ├─FileEnd ''
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// CHECK:STDOUT: (root)
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