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.
32 lines
1.6 KiB
Plaintext
32 lines
1.6 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
// AUTOUPDATE
|
|
// CHECK:STDOUT: [
|
|
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
|
|
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'F'},
|
|
// CHECK:STDOUT: {kind: 'ParameterListStart', text: '('},
|
|
// CHECK:STDOUT: {kind: 'ParameterList', text: ')', subtree_size: 2},
|
|
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
|
|
// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
|
|
// CHECK:STDOUT: {kind: 'DeclaredName', text: 'n'},
|
|
// CHECK:STDOUT: {kind: 'Literal', text: 'i32'},
|
|
// CHECK:STDOUT: {kind: 'PatternBinding', text: ':', subtree_size: 3},
|
|
// CHECK:STDOUT: {kind: 'VariableInitializer', text: '='},
|
|
// CHECK:STDOUT: {kind: 'InvalidParse', text: ';', has_error: yes},
|
|
// CHECK:STDOUT: {kind: 'InvalidParse', text: ';', has_error: yes},
|
|
// CHECK:STDOUT: {kind: 'InvalidParse', text: ';', has_error: yes},
|
|
// CHECK:STDOUT: {kind: 'InvalidParse', text: ';', has_error: yes},
|
|
// CHECK:STDOUT: {kind: 'InvalidParse', text: ';', has_error: yes},
|
|
// CHECK:STDOUT: {kind: 'IfExpression', text: 'if', has_error: yes, subtree_size: 6},
|
|
// CHECK:STDOUT: {kind: 'VariableDeclaration', text: ';', subtree_size: 12},
|
|
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 18},
|
|
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
|
|
// CHECK:STDOUT: ]
|
|
|
|
fn F() {
|
|
// CHECK:STDERR: fail_condition_missing.carbon:[[@LINE+1]]:18: Expected expression.
|
|
var n: i32 = if;
|
|
}
|