mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Richard Smith
2c45cb3be8
We model `if a then b else` as a prefix operator for parsing precedence purposes. The rule that a statement starting with `if` is never an `if` expression is handled implicitly because the statement parser never invokes the expression parser for a statement starting with `if`. This exposed a bug in our diagnosis of the whitespace rule for prefix operators, which was incorrectly being applied to non-symbolic operators in some cases, and was producing a bogus second diagnostic in some cases, which is also fixed here.
38 lines
2.0 KiB
Plaintext
38 lines
2.0 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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//
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// AUTOUPDATE
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// CHECK:STDOUT: [
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// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
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// CHECK:STDOUT: {kind: 'DeclaredName', text: 'F'},
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// CHECK:STDOUT: {kind: 'ParameterListStart', text: '('},
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// CHECK:STDOUT: {kind: 'DeclaredName', text: 'b'},
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// CHECK:STDOUT: {kind: 'NameReference', text: 'bool'},
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// CHECK:STDOUT: {kind: 'PatternBinding', text: ':', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'ParameterList', text: ')', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'NameReference', text: 'bool'},
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// CHECK:STDOUT: {kind: 'ReturnType', text: '->', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 10},
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// CHECK:STDOUT: {kind: 'ReturnStatementStart', text: 'return'},
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// CHECK:STDOUT: {kind: 'NameReference', text: 'b'},
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// CHECK:STDOUT: {kind: 'NameReference', text: 'b'},
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// CHECK:STDOUT: {kind: 'InfixOperator', text: 'and', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'IfExpressionThen', text: 'then'},
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// CHECK:STDOUT: {kind: 'NameReference', text: 'b'},
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// CHECK:STDOUT: {kind: 'NameReference', text: 'b'},
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// CHECK:STDOUT: {kind: 'InfixOperator', text: 'and', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'IfExpressionElse', text: 'else'},
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// CHECK:STDOUT: {kind: 'NameReference', text: 'b'},
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// CHECK:STDOUT: {kind: 'NameReference', text: 'b'},
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// CHECK:STDOUT: {kind: 'InfixOperator', text: 'or', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'IfExpression', text: 'if', subtree_size: 12},
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// CHECK:STDOUT: {kind: 'ReturnStatement', text: ';', subtree_size: 14},
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// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 25},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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fn F(b: bool) -> bool {
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return if b and b then b and b else b or b;
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}
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