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carbon-lang/toolchain/parse/testdata/class/adapt.carbon
T
Geoff Romer 4a0cf6c1fb Track the start of a signature more accurately (#6760) 
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.
2026-02-23 22:46:03 +00:00

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// 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
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/parse/testdata/class/adapt.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/parse/testdata/class/adapt.carbon
// --- adapt.carbon
class A {
adapt ();
}
class B {
adapt A;
}
class C {
adapt i32;
}
class D {
extend adapt {.a: i32, .b: i32};
}
class E {
adapt GetType(42);
}
// This is syntactically OK but semantically invalid.
adapt i32;
// --- fail_bad_syntax.carbon
class A {
// CHECK:STDERR: fail_bad_syntax.carbon:[[@LINE+4]]:11: error: `adapt` declarations must end with a `;` [ExpectedDeclSemi]
// CHECK:STDERR: adapt 1 trailing_token;
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR:
adapt 1 trailing_token;
}
class B {
// CHECK:STDERR: fail_bad_syntax.carbon:[[@LINE+4]]:8: error: expected expression [ExpectedExpr]
// CHECK:STDERR: adapt;
// CHECK:STDERR: ^
// CHECK:STDERR:
adapt;
}
class C {
adapt
// CHECK:STDERR: fail_bad_syntax.carbon:[[@LINE+4]]:1: error: expected expression [ExpectedExpr]
// CHECK:STDERR: }
// CHECK:STDERR: ^
// CHECK:STDERR:
}
class D {
// CHECK:STDERR: fail_bad_syntax.carbon:[[@LINE+4]]:9: error: expected expression [ExpectedExpr]
// CHECK:STDERR: adapt class;
// CHECK:STDERR: ^~~~~
// CHECK:STDERR:
adapt class;
}
fn F() {
adapt i32;
}
// CHECK:STDOUT: - filename: adapt.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'ClassIntroducer', text: 'class'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'A'},
// CHECK:STDOUT: {kind: 'ClassDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AdaptIntroducer', text: 'adapt'},
// CHECK:STDOUT: {kind: 'TupleLiteralStart', text: '('},
// CHECK:STDOUT: {kind: 'TupleLiteral', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'AdaptDecl', text: ';', subtree_size: 4},
// CHECK:STDOUT: {kind: 'ClassDefinition', text: '}', subtree_size: 8},
// CHECK:STDOUT: {kind: 'ClassIntroducer', text: 'class'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'B'},
// CHECK:STDOUT: {kind: 'ClassDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AdaptIntroducer', text: 'adapt'},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'A'},
// CHECK:STDOUT: {kind: 'AdaptDecl', text: ';', subtree_size: 3},
// CHECK:STDOUT: {kind: 'ClassDefinition', text: '}', subtree_size: 7},
// CHECK:STDOUT: {kind: 'ClassIntroducer', text: 'class'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'C'},
// CHECK:STDOUT: {kind: 'ClassDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AdaptIntroducer', text: 'adapt'},
// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
// CHECK:STDOUT: {kind: 'AdaptDecl', text: ';', subtree_size: 3},
// CHECK:STDOUT: {kind: 'ClassDefinition', text: '}', subtree_size: 7},
// CHECK:STDOUT: {kind: 'ClassIntroducer', text: 'class'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'D'},
// CHECK:STDOUT: {kind: 'ClassDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AdaptIntroducer', text: 'adapt'},
// CHECK:STDOUT: {kind: 'ExtendModifier', text: 'extend'},
// CHECK:STDOUT: {kind: 'StructTypeLiteralStart', text: '{'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'a'},
// CHECK:STDOUT: {kind: 'StructFieldDesignator', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
// CHECK:STDOUT: {kind: 'StructTypeLiteralField', text: ':', subtree_size: 4},
// CHECK:STDOUT: {kind: 'StructTypeLiteralComma', text: ','},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'b'},
// CHECK:STDOUT: {kind: 'StructFieldDesignator', text: '.', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
// CHECK:STDOUT: {kind: 'StructTypeLiteralField', text: ':', subtree_size: 4},
// CHECK:STDOUT: {kind: 'StructTypeLiteral', text: '}', subtree_size: 11},
// CHECK:STDOUT: {kind: 'AdaptDecl', text: ';', subtree_size: 14},
// CHECK:STDOUT: {kind: 'ClassDefinition', text: '}', subtree_size: 18},
// CHECK:STDOUT: {kind: 'ClassIntroducer', text: 'class'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'E'},
// CHECK:STDOUT: {kind: 'ClassDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AdaptIntroducer', text: 'adapt'},
// CHECK:STDOUT: {kind: 'IdentifierNameExpr', text: 'GetType'},
// CHECK:STDOUT: {kind: 'CallExprStart', text: '(', subtree_size: 2},
// CHECK:STDOUT: {kind: 'IntLiteral', text: '42'},
// CHECK:STDOUT: {kind: 'CallExpr', text: ')', subtree_size: 4},
// CHECK:STDOUT: {kind: 'AdaptDecl', text: ';', subtree_size: 6},
// CHECK:STDOUT: {kind: 'ClassDefinition', text: '}', subtree_size: 10},
// CHECK:STDOUT: {kind: 'AdaptIntroducer', text: 'adapt'},
// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
// CHECK:STDOUT: {kind: 'AdaptDecl', text: ';', subtree_size: 3},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_bad_syntax.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'ClassIntroducer', text: 'class'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'A'},
// CHECK:STDOUT: {kind: 'ClassDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AdaptIntroducer', text: 'adapt'},
// CHECK:STDOUT: {kind: 'IntLiteral', text: '1'},
// CHECK:STDOUT: {kind: 'AdaptDecl', text: ';', has_error: yes, subtree_size: 3},
// CHECK:STDOUT: {kind: 'ClassDefinition', text: '}', subtree_size: 7},
// CHECK:STDOUT: {kind: 'ClassIntroducer', text: 'class'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'B'},
// CHECK:STDOUT: {kind: 'ClassDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AdaptIntroducer', text: 'adapt'},
// CHECK:STDOUT: {kind: 'InvalidParse', text: ';', has_error: yes},
// CHECK:STDOUT: {kind: 'AdaptDecl', text: ';', has_error: yes, subtree_size: 3},
// CHECK:STDOUT: {kind: 'ClassDefinition', text: '}', subtree_size: 7},
// CHECK:STDOUT: {kind: 'ClassIntroducer', text: 'class'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'C'},
// CHECK:STDOUT: {kind: 'ClassDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AdaptIntroducer', text: 'adapt'},
// CHECK:STDOUT: {kind: 'InvalidParse', text: '}', has_error: yes},
// CHECK:STDOUT: {kind: 'AdaptDecl', text: 'adapt', has_error: yes, subtree_size: 3},
// CHECK:STDOUT: {kind: 'ClassDefinition', text: '}', subtree_size: 7},
// CHECK:STDOUT: {kind: 'ClassIntroducer', text: 'class'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'D'},
// CHECK:STDOUT: {kind: 'ClassDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AdaptIntroducer', text: 'adapt'},
// CHECK:STDOUT: {kind: 'InvalidParse', text: 'class', has_error: yes},
// CHECK:STDOUT: {kind: 'AdaptDecl', text: ';', has_error: yes, subtree_size: 3},
// CHECK:STDOUT: {kind: 'ClassDefinition', text: '}', subtree_size: 7},
// CHECK:STDOUT: {kind: 'FunctionIntroducer', text: 'fn'},
// CHECK:STDOUT: {kind: 'IdentifierNameMaybeBeforeSignature', text: 'F'},
// CHECK:STDOUT: {kind: 'ExplicitParamListStart', text: '('},
// CHECK:STDOUT: {kind: 'ExplicitParamList', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'FunctionDefinitionStart', text: '{', subtree_size: 5},
// CHECK:STDOUT: {kind: 'AdaptIntroducer', text: 'adapt'},
// CHECK:STDOUT: {kind: 'IntTypeLiteral', text: 'i32'},
// CHECK:STDOUT: {kind: 'AdaptDecl', text: ';', subtree_size: 3},
// CHECK:STDOUT: {kind: 'FunctionDefinition', text: '}', subtree_size: 9},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
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