clang-tidy & clang-config Google styleguide

.clang-format

---
BasedOnStyle: Google

# We keep 2-space indentation, 80-column limit, attached braces, etc.
IndentWidth: 2
TabWidth: 2
UseTab: Never
ColumnLimit: 80
BreakBeforeBraces: Attach

# Keep namespaces unindented in Google style.
NamespaceIndentation: None

# Google style typically aligns access specifiers (public, private, etc.)
AccessModifierOffset: -2

# Avoid single-line if/else, loops, and function bodies in Google style.
AllowShortIfStatementsOnASingleLine: false
AllowShortLoopsOnASingleLine: false
AllowShortFunctionsOnASingleLine: Empty

# No spaces inside parentheses or angle brackets.
SpacesInParentheses: false
SpacesInAngles: false

# Some additional fine-tuning.
SpaceAfterCStyleCast: true
SpaceBeforeAssignmentOperators: true
PenaltyReturnTypeOnItsOwnLine: 200

# -- Include sorting settings --
#
# SortIncludes: true -> clang-format will sort #includes.
# IncludeBlocks: Preserve -> clang-format will NOT merge or split #include
# blocks, but will reorder includes *within* each block. That way you can have
# separate blocks for system headers, library headers, local headers, etc., and
# clang-format won't reorder across those blank-line boundaries.

SortIncludes: true
IncludeBlocks: Preserve

.clang-tidy

---
# In this section, we define which checks we want to run or disable.
# We enable most checks, including Google style checks, readability,
# modernize, performance, and so on. Then we explicitly disable
# certain checks that conflict with our style preferences.

Checks: clang-diagnostic-*
  clang-analyzer-*
  google-*
  readability-*
  modernize-*
  performance-*
  readability-identifier-naming

  -google-runtime-references
  -google-readability-todo
  -modernize-use-trailing-return-type

# Turn all warnings into errors.
WarningsAsErrors: "*"

HeaderFilterRegex: ".*"
AnalyzeTemporaryDtors: false

CheckOptions:
  # ========================
  # == Identifier Naming  ==
  # ========================
  #
  # The following keys configure the naming style in line with
  # a typical Google C++ Style approach, adjusting prefixes, suffixes,
  # and case for classes, functions, variables, etc.

  - key: readability-identifier-naming.ClassCase
    value: CamelCase
  - key: readability-identifier-naming.StructCase
    value: CamelCase
  - key: readability-identifier-naming.ClassAbstractCase
    value: CamelCase
  - key: readability-identifier-naming.EnumCase
    value: CamelCase
  - key: readability-identifier-naming.EnumConstantCase
    value: CamelCase
  - key: readability-identifier-naming.EnumConstantPrefix
    value: "k"
  - key: readability-identifier-naming.ConstantCase
    value: CamelCase
  - key: readability-identifier-naming.ConstantPrefix
    value: "k"
  - key: readability-identifier-naming.FunctionCase
    value: CamelCase
  - key: readability-identifier-naming.MethodCase
    value: CamelCase
  - key: readability-identifier-naming.PrivateMethodCase
    value: CamelCase
  - key: readability-identifier-naming.ParameterCase
    value: lower_case
  - key: readability-identifier-naming.LocalVariableCase
    value: lower_case
  - key: readability-identifier-naming.GlobalVariableCase
    value: snake_case
  - key: readability-identifier-naming.GlobalVariablePrefix
    value: "g_"
  - key: readability-identifier-naming.MemberCase
    value: lower_case
  - key: readability-identifier-naming.MemberSuffix
    value: "_"
  - key: readability-identifier-naming.ClassConstantCase
    value: CamelCase
  - key: readability-identifier-naming.ClassConstantPrefix
    value: "k"
  - key: readability-identifier-naming.ClassMemberCase
    value: lower_case
  - key: readability-identifier-naming.ClassMemberSuffix
    value: "_"

  # ==================================
  # == Additional Google / Modernize ==
  # ==================================
  #
  # Here are some extra checks aligned with Google style.
  # We can also configure their behavior.

  - key: google-build-using-namespace.ShortNamespaceLines
    value: "1"

  - key: google-readability-braces-around-statements.ShortStatementLines
    value: "1"

  - key: google-runtime-int.IncludeStyle
    value: "uint16"

  - key: google-explicit-constructor.StrictMode
    value: "false"

  - key: modernize-use-override.IgnoreDestructors
    value: "true"

  - key: modernize-use-nullptr.NullMacros
    value: "NULL"

  - key: performance-for-range-copy.AllowedTypes
    value: "std::initializer_list"