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4a0cf6c1fb0fb1880ad09a18265b820bcdda8dcd
carbon-lang/toolchain/parse/testdata/generics/interface/fail_associated_constants.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/generics/interface/fail_associated_constants.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/parse/testdata/generics/interface/fail_associated_constants.carbon
// --- fail_tuple_pattern.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_tuple_pattern.carbon:[[@LINE+4]]:7: error: expected identifier in associated constant declaration [ExpectedAssociatedConstantIdentifier]
// CHECK:STDERR: let (T:! type, U:! type);
// CHECK:STDERR: ^
// CHECK:STDERR:
let (T:! type, U:! type);
}
// --- fail_tuple_pattern_with_default.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_tuple_pattern_with_default.carbon:[[@LINE+4]]:15: error: expected identifier in associated constant declaration [ExpectedAssociatedConstantIdentifier]
// CHECK:STDERR: default let (T:! type, U:! type) = ({}, {});
// CHECK:STDERR: ^
// CHECK:STDERR:
default let (T:! type, U:! type) = ({}, {});
}
// --- fail_var_pattern.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_var_pattern.carbon:[[@LINE+4]]:7: error: expected identifier in associated constant declaration [ExpectedAssociatedConstantIdentifier]
// CHECK:STDERR: let var T:! type;
// CHECK:STDERR: ^~~
// CHECK:STDERR:
let var T:! type;
}
// --- fail_var_pattern_with_default.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_var_pattern_with_default.carbon:[[@LINE+4]]:15: error: expected identifier in associated constant declaration [ExpectedAssociatedConstantIdentifier]
// CHECK:STDERR: default let var T:! type = {};
// CHECK:STDERR: ^~~
// CHECK:STDERR:
default let var T:! type = {};
}
// --- fail_not_constant.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_not_constant.carbon:[[@LINE+4]]:8: error: found runtime binding pattern in associated constant declaration; expected a `:!` binding [ExpectedAssociatedConstantColonExclaim]
// CHECK:STDERR: let a: {.b: ()};
// CHECK:STDERR: ^
// CHECK:STDERR:
let a: {.b: ()};
}
// --- fail_template.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_template.carbon:[[@LINE+4]]:7: error: expected identifier in associated constant declaration [ExpectedAssociatedConstantIdentifier]
// CHECK:STDERR: let template T:! type;
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR:
let template T:! type;
}
// --- fail_underscore.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_underscore.carbon:[[@LINE+4]]:7: error: expected identifier in associated constant declaration [ExpectedAssociatedConstantIdentifier]
// CHECK:STDERR: let _:! {};
// CHECK:STDERR: ^
// CHECK:STDERR:
let _:! {};
}
// CHECK:STDOUT: - filename: fail_tuple_pattern.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'LibraryIntroducer', text: 'library'},
// CHECK:STDOUT: {kind: 'LibraryName', text: '"tuple_pattern"'},
// CHECK:STDOUT: {kind: 'LibraryDecl', text: ';', subtree_size: 3},
// CHECK:STDOUT: {kind: 'InterfaceIntroducer', text: 'interface'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'I'},
// CHECK:STDOUT: {kind: 'InterfaceDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AssociatedConstantIntroducer', text: 'let'},
// CHECK:STDOUT: {kind: 'AssociatedConstantDecl', text: ';', has_error: yes, subtree_size: 2},
// CHECK:STDOUT: {kind: 'InterfaceDefinition', text: '}', subtree_size: 6},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_tuple_pattern_with_default.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'LibraryIntroducer', text: 'library'},
// CHECK:STDOUT: {kind: 'LibraryName', text: '"tuple_pattern_with_default"'},
// CHECK:STDOUT: {kind: 'LibraryDecl', text: ';', subtree_size: 3},
// CHECK:STDOUT: {kind: 'InterfaceIntroducer', text: 'interface'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'I'},
// CHECK:STDOUT: {kind: 'InterfaceDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AssociatedConstantIntroducer', text: 'let'},
// CHECK:STDOUT: {kind: 'DefaultModifier', text: 'default'},
// CHECK:STDOUT: {kind: 'AssociatedConstantDecl', text: ';', has_error: yes, subtree_size: 3},
// CHECK:STDOUT: {kind: 'InterfaceDefinition', text: '}', subtree_size: 7},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_var_pattern.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'LibraryIntroducer', text: 'library'},
// CHECK:STDOUT: {kind: 'LibraryName', text: '"var_pattern"'},
// CHECK:STDOUT: {kind: 'LibraryDecl', text: ';', subtree_size: 3},
// CHECK:STDOUT: {kind: 'InterfaceIntroducer', text: 'interface'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'I'},
// CHECK:STDOUT: {kind: 'InterfaceDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AssociatedConstantIntroducer', text: 'let'},
// CHECK:STDOUT: {kind: 'AssociatedConstantDecl', text: ';', has_error: yes, subtree_size: 2},
// CHECK:STDOUT: {kind: 'InterfaceDefinition', text: '}', subtree_size: 6},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_var_pattern_with_default.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'LibraryIntroducer', text: 'library'},
// CHECK:STDOUT: {kind: 'LibraryName', text: '"var_pattern_with_default"'},
// CHECK:STDOUT: {kind: 'LibraryDecl', text: ';', subtree_size: 3},
// CHECK:STDOUT: {kind: 'InterfaceIntroducer', text: 'interface'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'I'},
// CHECK:STDOUT: {kind: 'InterfaceDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AssociatedConstantIntroducer', text: 'let'},
// CHECK:STDOUT: {kind: 'DefaultModifier', text: 'default'},
// CHECK:STDOUT: {kind: 'AssociatedConstantDecl', text: ';', has_error: yes, subtree_size: 3},
// CHECK:STDOUT: {kind: 'InterfaceDefinition', text: '}', subtree_size: 7},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_not_constant.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'LibraryIntroducer', text: 'library'},
// CHECK:STDOUT: {kind: 'LibraryName', text: '"not_constant"'},
// CHECK:STDOUT: {kind: 'LibraryDecl', text: ';', subtree_size: 3},
// CHECK:STDOUT: {kind: 'InterfaceIntroducer', text: 'interface'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'I'},
// CHECK:STDOUT: {kind: 'InterfaceDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AssociatedConstantIntroducer', text: 'let'},
// CHECK:STDOUT: {kind: 'AssociatedConstantDecl', text: ';', has_error: yes, subtree_size: 2},
// CHECK:STDOUT: {kind: 'InterfaceDefinition', text: '}', subtree_size: 6},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_template.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'LibraryIntroducer', text: 'library'},
// CHECK:STDOUT: {kind: 'LibraryName', text: '"template"'},
// CHECK:STDOUT: {kind: 'LibraryDecl', text: ';', subtree_size: 3},
// CHECK:STDOUT: {kind: 'InterfaceIntroducer', text: 'interface'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'I'},
// CHECK:STDOUT: {kind: 'InterfaceDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AssociatedConstantIntroducer', text: 'let'},
// CHECK:STDOUT: {kind: 'AssociatedConstantDecl', text: ';', has_error: yes, subtree_size: 2},
// CHECK:STDOUT: {kind: 'InterfaceDefinition', text: '}', subtree_size: 6},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
// CHECK:STDOUT: - filename: fail_underscore.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'LibraryIntroducer', text: 'library'},
// CHECK:STDOUT: {kind: 'LibraryName', text: '"underscore"'},
// CHECK:STDOUT: {kind: 'LibraryDecl', text: ';', subtree_size: 3},
// CHECK:STDOUT: {kind: 'InterfaceIntroducer', text: 'interface'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'I'},
// CHECK:STDOUT: {kind: 'InterfaceDefinitionStart', text: '{', subtree_size: 3},
// CHECK:STDOUT: {kind: 'AssociatedConstantIntroducer', text: 'let'},
// CHECK:STDOUT: {kind: 'AssociatedConstantDecl', text: ';', has_error: yes, subtree_size: 2},
// CHECK:STDOUT: {kind: 'InterfaceDefinition', text: '}', subtree_size: 6},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]
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