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.clang-tidy
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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
---
# Get colors when outputting through `bazel build --config=clang-tidy`.
UseColor: true
# This is necessary for `--config=clang-tidy` to catch errors.
WarningsAsErrors: '*'
# - bugprone-exception-escape finds issues like out-of-memory in main(). We
# don't use exceptions, so it's unlikely to find real issues.
# - bugprone-unchecked-optional-access in clang-tidy 16 has false positives on
# code like:
# while (auto name_ref = insts().Get(inst_id).TryAs<SemIR::NameRef>()) {
# inst_id = name_ref->value_id;
# ^ unchecked access to optional value
# }
# - bugprone-switch-missing-default-case has false positives for `enum_base.h`.
# Clang's built-in switch warnings cover most of our risk of bugs here.
# - google-readability-function-size overlaps with readability-function-size.
# - modernize-use-designated-initializers is disabled because it fires on
# creation of SemIR typed insts, for which we do not currently want to use
# designated initialization.
# - modernize-use-nodiscard is disabled because it only fixes const methods,
# not non-const, which yields distracting results on accessors.
# - performance-unnecessary-value-param is disabled because it duplicate
# modernize-pass-by-value.
Checks:
-*, bugprone-*, -bugprone-branch-clone, -bugprone-easily-swappable-parameters,
-bugprone-exception-escape, -bugprone-narrowing-conversions,
-bugprone-switch-missing-default-case, -bugprone-unchecked-optional-access,
google-*, -google-readability-function-size, -google-readability-todo,
misc-definitions-in-headers, misc-misplaced-const, misc-redundant-expression,
misc-static-assert, misc-unconventional-assign-operator,
misc-uniqueptr-reset-release, misc-unused-*, modernize-*,
-modernize-avoid-c-arrays, -modernize-return-braced-init-list,
-modernize-use-default-member-init, -modernize-use-designated-initializers,
-modernize-use-emplace, -modernize-use-nodiscard, performance-*,
-performance-unnecessary-value-param, readability-*,
-readability-convert-member-functions-to-static,
-readability-function-cognitive-complexity, -readability-else-after-return,
-readability-identifier-length, -readability-implicit-bool-conversion,
-readability-magic-numbers, -readability-make-member-function-const,
-readability-static-definition-in-anonymous-namespace,
-readability-suspicious-call-argument, -readability-use-anyofallof
CheckOptions:
- { key: readability-identifier-naming.ClassCase, value: CamelCase }
- { key: readability-identifier-naming.ClassConstantCase, value: CamelCase }
- {
key: readability-identifier-naming.ConstexprVariableCase,
value: CamelCase,
}
- { key: readability-identifier-naming.NamespaceCase, value: CamelCase }
- { key: readability-identifier-naming.StructCase, value: CamelCase }
- {
key: readability-identifier-naming.TemplateParameterCase,
value: CamelCase,
}
- { key: readability-identifier-naming.TypeAliasCase, value: CamelCase }
- { key: readability-identifier-naming.TypedefCase, value: CamelCase }
- { key: readability-identifier-naming.UnionCase, value: CamelCase }
- { key: readability-identifier-naming.VariableCase, value: lower_case }
- { key: readability-identifier-naming.ParameterCase, value: lower_case }
- { key: readability-identifier-naming.ClassMemberCase, value: lower_case }
- {
key: readability-identifier-naming.MethodIgnoredRegexp,
value: '^classof$',
}
- {
# This erroneously fires in C++20 mode with LLVM 16 clang-tidy, due to:
# https://github.com/llvm/llvm-project/issues/46097
key: readability-identifier-naming.TemplateParameterIgnoredRegexp,
value: '^expr-type$',
}