clang-tidy - readability-const-return-type — Extra Clang Tools 12 documentation

# Extra Clang Tools 12 documentation

## clang-tidy - readability-const-return-type

# readability-const-return-type

Checks for functions with a `const`-qualified return type and recommends removal of the `const` keyword. Such use of const is usually superfluous, and can prevent valuable compiler optimizations. Does not (yet) fix trailing return types.

Examples:

    const int foo();
    const Clazz foo();
    Clazz *const foo();

Note that this applies strictly to top-level qualification, which excludes pointers or references to const values. For example, these are fine:

    const int* foo();
    const int& foo();
    const Clazz* foo();