How you know you're writing c++

• cppbestpractices

  1 5,797 3.5

  Discontinued Collaborative Collection of C++ Best Practices. This online resource is part of Jason Turner's collection of C++ Best Practices resources. See README.md for more information. [Moved to: https://github.com/cpp-best-practices/cppbestpractices] (by lefticus)

  

# from here: # # https://github.com/lefticus/cppbestpractices/blob/master/02-Use_the_Tools_Avai lable.md function(set_project_warnings project_name) option(WARNINGS_AS_ERRORS "Treat compiler warnings as errors" TRUE) set(MSVC_WARNINGS /W4 # Baseline reasonable warnings /w14242 # 'identifier': conversion from 'type1' to 'type1', possible loss of data /w14254 # 'operator': conversion from 'type1:field_bits' to 'type2:field_bits', possible loss of data /w14263 # 'function': member function does not override any base class virtual member function /w14265 # 'classname': class has virtual functions, but destructor is not virtual instances of this class may not # be destructed correctly /w14287 # 'operator': unsigned/negative constant mismatch /we4289 # nonstandard extension used: 'variable': loop control variable declared in the for-loop is used outside # the for-loop scope /w14296 # 'operator': expression is always 'boolean_value' /w14311 # 'variable': pointer truncation from 'type1' to 'type2' /w14545 # expression before comma evaluates to a function which is missing an argument list /w14546 # function call before comma missing argument list /w14547 # 'operator': operator before comma has no effect; expected operator with side-effect /w14549 # 'operator': operator before comma has no effect; did you intend 'operator'? /w14555 # expression has no effect; expected expression with side- effect /w14619 # pragma warning: there is no warning number 'number' /w14640 # Enable warning on thread un-safe static member initialization /w14826 # Conversion from 'type1' to 'type_2' is sign-extended. This may cause unexpected runtime behavior. /w14905 # wide string literal cast to 'LPSTR' /w14906 # string literal cast to 'LPWSTR' /w14928 # illegal copy-initialization; more than one user-defined conversion has been implicitly applied /permissive- # standards conformance mode for MSVC compiler. ) set(CLANG_WARNINGS -Wall -Wextra # reasonable and standard -Wshadow # warn the user if a variable declaration shadows one from a parent context -Wnon-virtual-dtor # warn the user if a class with virtual functions has a non-virtual destructor. This helps # catch hard to track down memory errors -Wold-style-cast # warn for c-style casts -Wcast-align # warn for potential performance problem casts -Wunused # warn on anything being unused -Woverloaded-virtual # warn if you overload (not override) a virtual function -Wpedantic # warn if non-standard C++ is used -Wconversion # warn on type conversions that may lose data -Wsign-conversion # warn on sign conversions -Wnull-dereference # warn if a null dereference is detected -Wdouble-promotion # warn if float is implicit promoted to double -Wformat=2 # warn on security issues around functions that format output (ie printf) ) if(WARNINGS_AS_ERRORS) set(CLANG_WARNINGS ${CLANG_WARNINGS} -Werror) set(MSVC_WARNINGS ${MSVC_WARNINGS} /WX) endif() set(GCC_WARNINGS ${CLANG_WARNINGS} -Wmisleading-indentation # warn if indentation implies blocks where blocks do not exist -Wduplicated-cond # warn if if / else chain has duplicated conditions -Wduplicated-branches # warn if if / else branches have duplicated code -Wlogical-op # warn about logical operations being used where bitwise were probably wanted -Wuseless-cast # warn if you perform a cast to the same type ) if(MSVC) set(PROJECT_WARNINGS ${MSVC_WARNINGS}) elseif(CMAKE_CXX_COMPILER_ID MATCHES ".*Clang") set(PROJECT_WARNINGS ${CLANG_WARNINGS}) elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU") set(PROJECT_WARNINGS ${GCC_WARNINGS}) else() message(AUTHOR_WARNING "No compiler warnings set for '${CMAKE_CXX_COMPILER_ID}' compiler.") endif() target_compile_options(${project_name} INTERFACE ${PROJECT_WARNINGS}) endfunction()

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