mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-05 06:31:03 +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`.
86 lines
4.5 KiB
Plaintext
86 lines
4.5 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/operators/fail_precedence_assign.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/operators/fail_precedence_assign.carbon
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fn F() {
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var a: i32;
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// Assignment can only appear as an expression statement, not as a subexpression.
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// TODO: Produce the "can only be used as a complete statement" diagnostic in each of these cases.
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// CHECK:STDERR: fail_precedence_assign.carbon:[[@LINE+4]]:10: error: expected `,` or `)` [UnexpectedTokenAfterListElement]
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// CHECK:STDERR: 1 + (a = 1);
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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1 + (a = 1);
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// CHECK:STDERR: fail_precedence_assign.carbon:[[@LINE+8]]:19: error: expected `else` after `if ... then ...` [ExpectedElseAfterIf]
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// CHECK:STDERR: (if true then a += 1 else a /= 2);
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// CHECK:STDERR: ^~
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// CHECK:STDERR:
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// CHECK:STDERR: fail_precedence_assign.carbon:[[@LINE+4]]:19: error: expected `,` or `)` [UnexpectedTokenAfterListElement]
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// CHECK:STDERR: (if true then a += 1 else a /= 2);
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// CHECK:STDERR: ^~
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// CHECK:STDERR:
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(if true then a += 1 else a /= 2);
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// CHECK:STDERR: fail_precedence_assign.carbon:[[@LINE+4]]:7: error: operator `++` can only be used as a complete statement [StatementOperatorAsSubExpr]
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// CHECK:STDERR: a + ++a;
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// CHECK:STDERR: ^~
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// CHECK:STDERR:
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a + ++a;
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// CHECK:STDERR: fail_precedence_assign.carbon:[[@LINE+4]]:5: error: parentheses are required around this unary `if` operator [UnaryOperatorRequiresParentheses]
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// CHECK:STDERR: ++if c then a else b;
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// CHECK:STDERR: ^~
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// CHECK:STDERR:
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++if c then a else b;
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}
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// CHECK:STDOUT: - filename: fail_precedence_assign.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: │ │ ╭─VariableIntroducer 'var'
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// CHECK:STDOUT: │ │ │ ╭─IdentifierNameNotBeforeSignature 'a'
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// CHECK:STDOUT: │ │ │ ├─BindingPatternTypeStart ':'
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// CHECK:STDOUT: │ │ │ ├─IntTypeLiteral 'i32'
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// CHECK:STDOUT: │ │ │ ╭─VarBindingPattern ':'
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// CHECK:STDOUT: │ │ ├─VariablePattern 'var'
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// CHECK:STDOUT: │ ├─VariableDecl ';'
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// CHECK:STDOUT: │ │ ╭─IntLiteral '1'
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// CHECK:STDOUT: │ │ │ ╭─ParenExprStart '('
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// CHECK:STDOUT: │ │ │ ├─IdentifierNameExpr 'a'
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// CHECK:STDOUT: │ │ ├─ParenExpr ')' has_error
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// CHECK:STDOUT: │ │ ╭─InfixOperatorPlus '+'
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// CHECK:STDOUT: │ ├─ExprStatement ';'
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// CHECK:STDOUT: │ │ ╭─ParenExprStart '('
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// CHECK:STDOUT: │ │ │ ╭─BoolLiteralTrue 'true'
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// CHECK:STDOUT: │ │ │ ╭─IfExprIf 'if'
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// CHECK:STDOUT: │ │ │ │ ╭─IdentifierNameExpr 'a'
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// CHECK:STDOUT: │ │ │ ├─IfExprThen 'then'
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// CHECK:STDOUT: │ │ │ ├─InvalidParse '+=' has_error
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// CHECK:STDOUT: │ │ ├─IfExprElse 'if' has_error
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// CHECK:STDOUT: │ │ ╭─ParenExpr ')' has_error
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// CHECK:STDOUT: │ ├─ExprStatement ';'
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// CHECK:STDOUT: │ │ ╭─IdentifierNameExpr 'a'
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// CHECK:STDOUT: │ │ │ ╭─IdentifierNameExpr 'a'
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// CHECK:STDOUT: │ │ ├─PrefixOperatorPlusPlus '++'
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// CHECK:STDOUT: │ │ ╭─InfixOperatorPlus '+'
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// CHECK:STDOUT: │ ├─ExprStatement ';'
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// CHECK:STDOUT: │ │ ╭─IdentifierNameExpr 'c'
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// CHECK:STDOUT: │ │ ╭─IfExprIf 'if'
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// CHECK:STDOUT: │ │ │ ╭─IdentifierNameExpr 'a'
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// CHECK:STDOUT: │ │ ├─IfExprThen 'then'
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// CHECK:STDOUT: │ │ ├─IdentifierNameExpr 'b'
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// CHECK:STDOUT: │ │ ╭─IfExprElse 'else'
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// CHECK:STDOUT: │ │ ╭─PrefixOperatorPlusPlus '++'
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// CHECK:STDOUT: │ ├─ExprStatement ';'
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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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