[cfe-users] finding source-range of a macro-parameter name

folkert via cfe-users cfe-users at lists.llvm.org
Mon Oct 17 06:43:55 PDT 2016



#define W(A) while(A)

void myfunc()
        W(1) {

I would like retrieve a string for the "1" parameter of the while-macro.

Usually I would use:

	Lexer::getSourceText(CharSourceRange::getCharRange(sr), sm, LangOptions(), 0);

(with 'sr' being a SourceRange and sm a SourceManager object).

to retrieve part of the original source-code. This works fine for e.g.
int a = 1; but fails for #defines.

I tried getLocStart, getLocation, tried using Lexer::getLocForEndOfToken
and sm.getSpellingLoc but everything ends up with an empty string ("").

Any suggestions?


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