Question

How would I test if a c++ method is const qualified in clang?

For example::

class Inner{
public:
    int i;
    Inner();
    float inner_method() const;
};

I am using the clang-c library and I have tried using clang_isConstQualifiedType on the inner_method node. however this returns false.

I don’t mind if the answer uses the clang c++ headers.

Answer 1

In the C++ interface, the way to check this is using CXXMethodDecl::getTypeQualifiers(), or using FunctionProtoType::getTypeQuals() (depending on whether you have the declaration or the type). The Qualifiers::Const bit indicates whether the method (or method type) is const.

In the libclang C API, this information seems to only be used in the implementation of getCursorUSR, whose result is not intended to be parsed, so using the C++ API or submitting a patch to add this functionality to the C API are the best options.