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carbon-lang/toolchain/parse/testdata/generics/interface/fail_associated_constants.carbon
T
Geoff Romer 6429c1655c Make the tree structure more explicit in parse dumps (#7591) 
It's hard to track 2-space indent levels across large vertical gaps, and
it can be hard to suppress the instinct to read the dump as if it were
preorder. This change introduces a new dump mode that addresses both
problems by using box-drawing characters to explicitly represent the
parent-child edges of the tree. This new mode is the default, but the
old behavior remains available with
`--parse-dump-format=yaml-postorder`.
2026-07-31 16:44:18 +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]]:7: error: phase keyword is not allowed on an associated constant [PhaseKeywordInAssociatedConstant]
// CHECK:STDERR: let runtime a: {.b: ()};
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR:
let runtime a: {.b: ()};
}
// --- fail_template.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_template.carbon:[[@LINE+4]]:7: error: phase keyword is not allowed on an associated constant [PhaseKeywordInAssociatedConstant]
// CHECK:STDERR: let template T: type;
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR:
let template T: type;
}
// --- fail_generic.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_generic.carbon:[[@LINE+4]]:7: error: phase keyword is not allowed on an associated constant [PhaseKeywordInAssociatedConstant]
// CHECK:STDERR: let generic a: type;
// CHECK:STDERR: ^~~~~~~
// CHECK:STDERR:
let generic a: 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 _: {};
}
// --- fail_missing_colon.carbon
library "[[@TEST_NAME]]";
interface I {
// CHECK:STDERR: fail_missing_colon.carbon:[[@LINE+4]]:8: error: expected `:` in associated constant declaration [ExpectedAssociatedConstantColon]
// CHECK:STDERR: let a;
// CHECK:STDERR: ^
// CHECK:STDERR:
let a;
}
// CHECK:STDOUT: - filename: fail_tuple_pattern.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─LibraryIntroducer 'library'
// CHECK:STDOUT: │ ├─LibraryName '"tuple_pattern"'
// CHECK:STDOUT: ├─LibraryDecl ';'
// CHECK:STDOUT: │ ╭─InterfaceIntroducer 'interface'
// CHECK:STDOUT: │ ├─IdentifierNameNotBeforeSignature 'I'
// CHECK:STDOUT: │ ╭─InterfaceDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─AssociatedConstantIntroducer 'let'
// CHECK:STDOUT: │ ├─AssociatedConstantDecl ';' has_error
// CHECK:STDOUT: ├─InterfaceDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_tuple_pattern_with_default.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─LibraryIntroducer 'library'
// CHECK:STDOUT: │ ├─LibraryName '"tuple_pattern_with_default"'
// CHECK:STDOUT: ├─LibraryDecl ';'
// CHECK:STDOUT: │ ╭─InterfaceIntroducer 'interface'
// CHECK:STDOUT: │ ├─IdentifierNameNotBeforeSignature 'I'
// CHECK:STDOUT: │ ╭─InterfaceDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─AssociatedConstantIntroducer 'let'
// CHECK:STDOUT: │ │ ├─DefaultModifier 'default'
// CHECK:STDOUT: │ ├─AssociatedConstantDecl ';' has_error
// CHECK:STDOUT: ├─InterfaceDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_var_pattern.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─LibraryIntroducer 'library'
// CHECK:STDOUT: │ ├─LibraryName '"var_pattern"'
// CHECK:STDOUT: ├─LibraryDecl ';'
// CHECK:STDOUT: │ ╭─InterfaceIntroducer 'interface'
// CHECK:STDOUT: │ ├─IdentifierNameNotBeforeSignature 'I'
// CHECK:STDOUT: │ ╭─InterfaceDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─AssociatedConstantIntroducer 'let'
// CHECK:STDOUT: │ ├─AssociatedConstantDecl ';' has_error
// CHECK:STDOUT: ├─InterfaceDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_var_pattern_with_default.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─LibraryIntroducer 'library'
// CHECK:STDOUT: │ ├─LibraryName '"var_pattern_with_default"'
// CHECK:STDOUT: ├─LibraryDecl ';'
// CHECK:STDOUT: │ ╭─InterfaceIntroducer 'interface'
// CHECK:STDOUT: │ ├─IdentifierNameNotBeforeSignature 'I'
// CHECK:STDOUT: │ ╭─InterfaceDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─AssociatedConstantIntroducer 'let'
// CHECK:STDOUT: │ │ ├─DefaultModifier 'default'
// CHECK:STDOUT: │ ├─AssociatedConstantDecl ';' has_error
// CHECK:STDOUT: ├─InterfaceDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_not_constant.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─LibraryIntroducer 'library'
// CHECK:STDOUT: │ ├─LibraryName '"not_constant"'
// CHECK:STDOUT: ├─LibraryDecl ';'
// CHECK:STDOUT: │ ╭─InterfaceIntroducer 'interface'
// CHECK:STDOUT: │ ├─IdentifierNameNotBeforeSignature 'I'
// CHECK:STDOUT: │ ╭─InterfaceDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─AssociatedConstantIntroducer 'let'
// CHECK:STDOUT: │ ├─AssociatedConstantDecl ';' has_error
// CHECK:STDOUT: ├─InterfaceDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_template.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─LibraryIntroducer 'library'
// CHECK:STDOUT: │ ├─LibraryName '"template"'
// CHECK:STDOUT: ├─LibraryDecl ';'
// CHECK:STDOUT: │ ╭─InterfaceIntroducer 'interface'
// CHECK:STDOUT: │ ├─IdentifierNameNotBeforeSignature 'I'
// CHECK:STDOUT: │ ╭─InterfaceDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─AssociatedConstantIntroducer 'let'
// CHECK:STDOUT: │ ├─AssociatedConstantDecl ';' has_error
// CHECK:STDOUT: ├─InterfaceDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_generic.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─LibraryIntroducer 'library'
// CHECK:STDOUT: │ ├─LibraryName '"generic"'
// CHECK:STDOUT: ├─LibraryDecl ';'
// CHECK:STDOUT: │ ╭─InterfaceIntroducer 'interface'
// CHECK:STDOUT: │ ├─IdentifierNameNotBeforeSignature 'I'
// CHECK:STDOUT: │ ╭─InterfaceDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─AssociatedConstantIntroducer 'let'
// CHECK:STDOUT: │ ├─AssociatedConstantDecl ';' has_error
// CHECK:STDOUT: ├─InterfaceDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_underscore.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─LibraryIntroducer 'library'
// CHECK:STDOUT: │ ├─LibraryName '"underscore"'
// CHECK:STDOUT: ├─LibraryDecl ';'
// CHECK:STDOUT: │ ╭─InterfaceIntroducer 'interface'
// CHECK:STDOUT: │ ├─IdentifierNameNotBeforeSignature 'I'
// CHECK:STDOUT: │ ╭─InterfaceDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─AssociatedConstantIntroducer 'let'
// CHECK:STDOUT: │ ├─AssociatedConstantDecl ';' has_error
// CHECK:STDOUT: ├─InterfaceDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
// CHECK:STDOUT: - filename: fail_missing_colon.carbon
// CHECK:STDOUT: ╭─FileStart ''
// CHECK:STDOUT: │ ╭─LibraryIntroducer 'library'
// CHECK:STDOUT: │ ├─LibraryName '"missing_colon"'
// CHECK:STDOUT: ├─LibraryDecl ';'
// CHECK:STDOUT: │ ╭─InterfaceIntroducer 'interface'
// CHECK:STDOUT: │ ├─IdentifierNameNotBeforeSignature 'I'
// CHECK:STDOUT: │ ╭─InterfaceDefinitionStart '{'
// CHECK:STDOUT: │ │ ╭─AssociatedConstantIntroducer 'let'
// CHECK:STDOUT: │ ├─AssociatedConstantDecl ';' has_error
// CHECK:STDOUT: ├─InterfaceDefinition '}'
// CHECK:STDOUT: ├─FileEnd ''
// CHECK:STDOUT: (root)
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