.clang-tidy

# NOTE: following checks are disabled, because they have duplicates in other group:
#
# - readability-magic-numbers (duplicate of cppcoreguidelines-avoid-magic-numbers)
# - hicpp-no-malloc (duplicate of cppcoreguidelines-no-malloc)
# - hicpp-member-init (duplicate of cppcoreguidelines-pro-type-member-init)
# - performance-move-const-arg (duplicate of hicpp-move-const-arg)
# - bugprone-use-after-move (duplicate of hicpp-move-const-arg)
#
# NOTE: following checks are disabled because they are deprecated
# - cert-dcl21-cpp

Checks: '
-*,

readability-*,
clang-analyzer-*,
cert-*,
bugprone-*,
cppcoreguidelines-*,
concurrency-*,
performance-*,
hicpp-*,

-cppcoreguidelines-avoid-do-while
-cppcoreguidelines-non-private-member-variables-in-classes,

-hicpp-named-parameter,

-readability-avoid-const-params-in-decls,
-readability-identifier-length,
-readability-redundant-access-specifiers,
-readability-redundant-declaration,
-readability-static-accessed-through-instance,

-readability-identifier-naming,
-readability-use-anyofallof,
-readability-named-parameter,

-cert-dcl21-cpp

'

### Temporarily disabled because massive API changes:
# * rule: readability-identifier-naming

### Justifications for deactivated rules
# * rule: readability-avoid-const-params-in-decls
#   justification: Symmetry with definition and declaration when we enforce to add const to every parameter
#   example:
#     bad:
#       void myFunction(int); // declaration, broken symmetry, the argument is not const
#       void myFunction(const int) {} // definition
#     good:
#       void myFunction(const int); // declaration
#       void myFunction(const int) {} // definition
#
# * rule: readability-identifier-length
#   justification: In some functions single letter variables make sense, this is covered by the review process
#   example:
#      bad:
#        int sum(int summand1, int summand2); // here we would like to have single letter variable arguments
#      good:
#        int sum(int a, int b); // failure since a and b have less than three letters
#
# * rule: readability-redundant-access-specifiers
#   justification: The access specifier can be used to separate methods from members.
#   example:
#      bad:
#        private:
#          int foo();
#          int bar();
#
#          int baz { 42 };
#      good:
#        private:
#          int foo();
#          int bar();
#
#        private:
#          int bar { 42 };
#
# * rule: readability-redundant-declaration
#   justification: This rule has false positives with friend declarations.
#   example:
#      bad:
#        // in hpp file
#        class Foo {
#            friend void bar(Foo& foo);
#        };
#        // in cpp file
#        void bar(Foo& foo) {...}
#      good:
#        // in hpp file
#        class Foo {
#            friend void bar(Foo& foo);
#        };
#        void bar(Foo& foo);
#        // in cpp file
#        void bar(Foo& foo) {...}
#
# * rule: readability-use-anyofallof
#   justification: requires C++20 and std::ranges but we only use C++17
#
# * rule: cppcoreguidelines-avoid-do-while
#   justification: there is nothing inherently wrong with do-while loops and there are valid use cases for them
#
# * rule: cppcoreguidelines-non-private-member-variables-in-classes
#   justification: Sometimes it makes sense to have protected members to extend the base class.
#                  Even public members are useful in lightweight classes (effectively structs).
#                  This unnecessarily limits design options.
#
# * rule: readability-named-parameter, -hicpp-named-parameter
#   justicfication: For tag types which just guide overloading no name is needed.
#                   Declaration of private functions does not require a name (no doxygen comment).
#                   For callbacks omitting the name is less verbose than to cast an unsued parameter to void.
#   callbacks
#   bad:
#       auto callable = [] (auto /*foo*/) {...};
#   good:
#       auto callable = [] (auto) {};
#   tag types
#   optional:
#       void foo(Tag1 tag); // (1) called with Tag1 type
#       void foo(Tag2 tag); // (2) called with Tag2 type
#       // dispatch site
#       Tag1 tag;
#       foo(tag); // calls (1)
#   also ok:
#       void foo(Tag1); // (1)
#       void foo(Tag2); // (2)
#       // dispatch site
#       Tag1 tag;
#       foo(tag); // calls (1)
#
## Those warnings should be enabled
## They are disabled since they require a heavy API refactoring and when we enable it we clutter the code with // NOLINT comments
# -bugprone-easily-swappable-parameters
#
## the LineThreshold, StatementThreshold, BranchThreshold contains random number
## here we have to do some heavy refactoring
# -readability-function-size
# -readability-function-cognitive-complexity
#
## is it working correctly? produces hard to understand warning
# -clang-analyzer-core.uninitialized.UndefReturn
# -clang-analyzer-optin.cplusplus.VirtualCall
#
###########################################
#### A lot of code changes but easy effort:
###########################################
# -readability-qualified-auto
# -readability-convert-member-functions-to-static
# -readability-container-size-empty
# -readability-simplify-boolean-expr
# -readability-const-return-type
# -readability-use-anyofallof
# -cppcoreguidelines-avoid-magic-numbers
# -cppcoreguidelines-init-variables
# -hicpp-use-auto
# -readability-qualified-auto
# -hicpp-uppercase-literal-suffix
# -readability-uppercase-literal-suffix
# -readability-implicit-bool-conversion
# -bugprone-branch-clone
# -hicpp-use-equals-default
# -hicpp-deprecated-headers
# -cppcoreguidelines-prefer-member-initializer
# -readability-convert-member-functions-to-static
# -cppcoreguidelines-pro-type-const-cast
# -cppcoreguidelines-pro-type-member-init
# -bugprone-implicit-widening-of-multiplication-result
# -readability-inconsistent-declaration-parameter-name
# -performance-for-range-copy
# -readability-make-member-function-const

WarningsAsErrors:     '' # Treat all Checks from above as errors
HeaderFilterRegex:    ''
FormatStyle:          file
InheritParentConfig:  false

# The options below are just uncommented temporarily so that we do not change
# the public API during the hack a thon
CheckOptions:
  #   - { key: readability-identifier-naming.ClassCase,               value: CamelCase }
  #   - { key: readability-identifier-naming.EnumCase,                value: CamelCase }
  #   - { key: readability-identifier-naming.StructCase,              value: CamelCase }
  #   - { key: readability-identifier-naming.UnionCase,               value: CamelCase }
  #   - { key: readability-identifier-naming.MethodCase,              value: camelBack }
  #   - { key: readability-identifier-naming.FunctionCase,            value: camelBack }
  #   - { key: readability-identifier-naming.NamespaceCase,           value: lower_case }
  - { key: readability-identifier-naming.PrivateMemberPrefix,     value: m_ }
  - { key: readability-identifier-naming.ProtectedMemberPrefix,   value: m_ }
  # - { key: readability-identifier-naming.MemberCase,              value: camelBack }
  # - { key: readability-identifier-naming.ConstexprVariableCase,   value: UPPER_CASE }
  # - { key: readability-identifier-naming.EnumConstantCase,        value: UPPER_CASE }
  # - { key: readability-identifier-naming.GlobalConstantCase,      value: UPPER_CASE }
  # - { key: readability-identifier-naming.TemplateParameterCase,   value: CamelCase }
  - { key: readability-function-size.LineThreshold,               value: 200 }
  - { key: readability-function-size.StatementThreshold,          value: 200 }
  - { key: readability-function-size.BranchThreshold,             value: 10 }
  - { key: readability-function-size.ParameterThreshold,          value: 4 }