mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-30 11:05:07 +01:00
Geoff Romer
4a0cf6c1fb
This change ensures that a function signature always starts with an `IdentifierNameMaybeBeforeSignature` node (renamed from `IdentifierNameBeforeParams`), even in the case of function declarations like `fn F -> T` that have no parameter list. As a consequence, this ensures that we push new entries onto `pattern_block_stack` and `full_pattern_stack` when we start processing the function signature.
86 lines
5.2 KiB
Plaintext
86 lines
5.2 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: parse_tree: [
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// CHECK:STDOUT: {kind: 'FileStart', text: ''},
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// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
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// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'F'},
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// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
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// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
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// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'a'},
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// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
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// CHECK:STDOUT: {kind: 'VarBindingPattern', text: ':', subtree_size: 3},
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// CHECK:STDOUT: {kind: 'VariablePattern', text: 'var', subtree_size: 4},
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// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 6},
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// CHECK:STDOUT: {kind: 'IntLiteral', text: '1'},
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// CHECK:STDOUT: {kind: 'ParenExprStart', text: '('},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'a'},
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// CHECK:STDOUT: {kind: 'ParenExpr', text: ')', has_error: yes, subtree_size: 3},
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// CHECK:STDOUT: {kind: 'InfixOperatorPlus', text: '+', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', subtree_size: 6},
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// CHECK:STDOUT: {kind: 'ParenExprStart', text: '('},
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// CHECK:STDOUT: {kind: 'BoolLiteralTrue', text: 'true'},
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// CHECK:STDOUT: {kind: 'IfExprIf', text: 'if', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'a'},
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// CHECK:STDOUT: {kind: 'IfExprThen', text: 'then', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'InvalidParse', text: '+=', has_error: yes},
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// CHECK:STDOUT: {kind: 'IfExprElse', text: 'if', has_error: yes, subtree_size: 6},
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// CHECK:STDOUT: {kind: 'ParenExpr', text: ')', has_error: yes, subtree_size: 8},
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// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', subtree_size: 9},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'a'},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'a'},
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// CHECK:STDOUT: {kind: 'PrefixOperatorPlusPlus', text: '++', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'InfixOperatorPlus', text: '+', subtree_size: 4},
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// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', subtree_size: 5},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'c'},
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// CHECK:STDOUT: {kind: 'IfExprIf', text: 'if', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'a'},
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// CHECK:STDOUT: {kind: 'IfExprThen', text: 'then', subtree_size: 2},
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// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'b'},
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// CHECK:STDOUT: {kind: 'IfExprElse', text: 'else', subtree_size: 6},
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// CHECK:STDOUT: {kind: 'PrefixOperatorPlusPlus', text: '++', subtree_size: 7},
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// CHECK:STDOUT: {kind: 'ExprStatement', text: ';', subtree_size: 8},
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// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 40},
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// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
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// CHECK:STDOUT: ]
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