---
# .clang-tidy
# Enforces naming conventions (style guide §1) and a subset of the Language
# Feature Do's and Don'ts (style guide §10) for C++ code. Place at the repo
# root for Part I (C++) files. For Part II (C API) files, use the
# directory-scoped override in c-api/.clang-tidy instead — clang-tidy picks
# the closest .clang-tidy file up the directory tree, so nesting one there
# gives that subtree different naming rules without affecting the rest of
# the project. See TOOLING.md for what this file can't check.
#
# readability-redundant-inline-specifier is a narrow, complementary aid for
# the "avoid inline member definitions" rule in §6 (Class Member
# Organization): it only catches an explicit `inline` keyword that's
# already redundant (e.g. on a function defined in the class body, which
# is implicitly inline regardless). It does not catch — and nothing in
# this file catches — an inline definition that omits the keyword
# entirely, which is the actual, common case the style guide rule is
# about; that one stays a code-review judgment call. See TOOLING.md.
Checks: >
  -*,
  readability-identifier-naming,
  readability-redundant-inline-specifier,
  modernize-use-nullptr,
  modernize-use-override,
  modernize-use-equals-default,
  modernize-use-equals-delete,
  modernize-loop-convert,
  modernize-concat-nested-namespaces,
  modernize-use-default-member-init,
  modernize-avoid-c-arrays,
  modernize-use-nodiscard,
  cppcoreguidelines-special-member-functions,
  cppcoreguidelines-owning-memory,
  cppcoreguidelines-no-malloc,
  cppcoreguidelines-pro-type-member-init,
  cppcoreguidelines-pro-type-cstyle-cast,
  cppcoreguidelines-macro-usage,
  performance-unnecessary-value-param,
  performance-unnecessary-copy-initialization,
  bugprone-exception-escape,
  bugprone-use-after-move

WarningsAsErrors: ''
HeaderFilterRegex: '.*\.hpp$'
FormatStyle: file

CheckOptions:
  # --- Naming Conventions — style guide §1 ---
  - key: readability-identifier-naming.NamespaceCase
    value: lower_case

  - key: readability-identifier-naming.ClassCase
    value: CamelCase
  - key: readability-identifier-naming.StructCase
    value: CamelCase
  - key: readability-identifier-naming.EnumCase
    value: CamelCase
  - key: readability-identifier-naming.EnumConstantCase
    value: CamelCase

  - key: readability-identifier-naming.FunctionCase
    value: camelBack
  - key: readability-identifier-naming.MethodCase
    value: camelBack

  - key: readability-identifier-naming.VariableCase
    value: camelBack
  - key: readability-identifier-naming.LocalVariableCase
    value: camelBack
  - key: readability-identifier-naming.ParameterCase
    value: camelBack

  # A plain local `const` (not `static`, not `constexpr`) stays under the
  # Local Variables rule (camelCase) per the style guide's own note that
  # only *global/static* const/constexpr values are "constants" for this
  # rule's purposes -- without this, it silently inherits the general
  # ConstantCase (PascalCase) fallback below instead, which would flag
  # totally ordinary code like `const std::string name = ...;` inside a
  # function. StaticConstantCase/GlobalConstantCase/ConstexprVariableCase
  # below are unaffected and still require PascalCase, matching the guide.
  - key: readability-identifier-naming.LocalConstantCase
    value: camelBack

  # Private/protected member variables: camelCase with an m_ prefix.
  - key: readability-identifier-naming.PrivateMemberCase
    value: camelBack
  - key: readability-identifier-naming.PrivateMemberPrefix
    value: m_
  - key: readability-identifier-naming.ProtectedMemberCase
    value: camelBack
  - key: readability-identifier-naming.ProtectedMemberPrefix
    value: m_
  # Public members (e.g. plain data structs) — camelCase, no prefix.
  - key: readability-identifier-naming.PublicMemberCase
    value: camelBack

  # Static class data members — camelCase with an s_ prefix (distinct from
  # instance members above). "ClassMember" is clang-tidy's category for
  # static (non-const) data members specifically.
  - key: readability-identifier-naming.ClassMemberCase
    value: camelBack
  - key: readability-identifier-naming.ClassMemberPrefix
    value: s_

  # Global (namespace/file-scope, mutable) variables — camelCase with a g_
  # prefix, to flag genuinely global mutable state at every use site.
  - key: readability-identifier-naming.GlobalVariableCase
    value: camelBack
  - key: readability-identifier-naming.GlobalVariablePrefix
    value: g_

  # Static variables — function-local `static` or file-scope `static` —
  # camelCase with an s_ prefix, for the same reason as globals above.
  - key: readability-identifier-naming.StaticVariableCase
    value: camelBack
  - key: readability-identifier-naming.StaticVariablePrefix
    value: s_

  # Constants and enum values — PascalCase (style guide §1 table).
  - key: readability-identifier-naming.ConstantCase
    value: CamelCase
  - key: readability-identifier-naming.GlobalConstantCase
    value: CamelCase
  - key: readability-identifier-naming.StaticConstantCase
    value: CamelCase
  - key: readability-identifier-naming.ClassConstantCase
    value: CamelCase
  - key: readability-identifier-naming.ConstexprVariableCase
    value: CamelCase

  # Template parameters — PascalCase (e.g. ValueType).
  - key: readability-identifier-naming.TemplateParameterCase
    value: CamelCase
  - key: readability-identifier-naming.TypeTemplateParameterCase
    value: CamelCase

  # Type aliases / typedefs — PascalCase, matching class naming.
  - key: readability-identifier-naming.TypeAliasCase
    value: CamelCase
  - key: readability-identifier-naming.TypedefCase
    value: CamelCase

  # Macros — ALL_CAPS_SNAKE_CASE (the one deliberate exception in §1).
  - key: readability-identifier-naming.MacroDefinitionCase
    value: UPPER_CASE

  # --- cppcoreguidelines-owning-memory — style guide §10, Memory and Ownership ---
  # Flags raw new/delete and legacy C allocators used for ownership instead of
  # std::unique_ptr / std::shared_ptr.
  - key: cppcoreguidelines-owning-memory.LegacyResourceProducers
    value: 'malloc;calloc;realloc;strdup;strndup'
  - key: cppcoreguidelines-owning-memory.LegacyResourceConsumers
    value: 'free;realloc'

  # --- cppcoreguidelines-macro-usage — style guide §10, prefer constexpr over #define ---
  # Allow include-guard-style and project-prefixed macros; flag everything else
  # that could instead be a constexpr constant.
  - key: cppcoreguidelines-macro-usage.AllowedRegexp
    value: '^[A-Z0-9_]+_H(PP)?$'
  - key: cppcoreguidelines-macro-usage.CheckCapsOnly
    value: false