/cxx_metro

Clang tool reporting C++ metrics

cxx_metro

Clang tool reporting C++ metrics

The idea of thi clang tool is to compile together metrics related to the different C++ entities, as e.g. other non-public tools do. While we have some clang-tidy checkers that report an isse as soon as a specific threshold is reached, we don't have an idea of the specific KPI all around the project and how this KPI can evolve.

An idea is to extract from readability-function-size clang-tidy-checker the following KPIs

Some ideas of the metrics are:

  • Function

    • MacCabe complexity
    • Number of Lines
    • Number of Statements This may differ significantly from the number of lines for macro-heavy code
    • Number of Branches
    • Number of Parameters
    • Number of whitespace characters used for indentation
    • Maximum Nesting Level Count compound statements which create next nesting level. This may differ significantly from the expected value for macro-heavy code.
    • Number of Local variables Please note that function parameters and variables declared in lambdas, GNU Statement Expressions, and nested class inline functions are not counted.

  • Classes

    • Number of base classes
    • Number of nested types (public/protected/private)
    • Number of functions members (static or not public/protected/private)
    • Number of data members (static or not public/protected/private)

  • Files

    • Number of included files

  • Namespaces

    • Level