HOWTO: visit initializers via libclang

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1

I'm trying to translate initializers (such as from function parameter or template parameter default values), but right now those are hidden behind an "UnexposedExpr". Is there some way to change that so I can access the initializer expression ?

Right now I'm mostly just interested into a stringified version, though eventually I would also like to extract the value, for cases where this is a compile-time expression.

Is this possible ?

Thanks,
         Stefan

2

Answering my own question (partially):

I'm starting from that UnexposedExpr cursor, compute its extent, then tokenize that range, and concatenate those token spellings, to regenerate the initializer expression. That seems to work well, with a single issue:

The range includes the first position, but excludes the last. However, passing that range to clang_tokenize will actually make the last token be one outside the range.

For example:

enum E { a = 1, b = 2};

yields ['1', ','] as token list for the first initializer expression, and ['2', '}'] for the second.

Here is my code:

   CXSourceRange r = clang_getCursorExtent(c);
   clang_tokenize(tu, r, &tokens, &num_tokens);
   for (unsigned i = 0; i != num_tokens; ++i)
   {
      ...

I guess I could work around this by looping till "num_tokens - 1", instead of "num_tokens".

Is this intended behavior, or a bug ?

Thanks,
         Stefan