[cfe-dev] Using Rewriter to remove a function call argument along with preceding comma?

[Argyrios Kyrtzidis]

On Jun 7, 2013, at 5:31 AM, Stephan Bergmann <sbergman at redhat.com> wrote:

> Am new here, hope this isn't too dumb a question.  (And from looking at the archives, fits better here than on cfe-users?)
> 
> Anyway, what I want to do is a rewriting Clang plugin that removes one argument from specific function calls.  But where I'm lost is how to determine the SourceLocation of the comma preceding the given argument, to do something like

You could remove this range:

[loc-for-end-of-token of end location of preceding argument, end location of removed argument]

like in these examples:

foo(4, 5, 6) --> foo(4, 6)
     ^-^

foo(4 , 5 , 6) --> foo(4 , 6)
     ^--^

foo(4, 5, 6) --> foo(4, 5)
        ^-^

foo( 4 , 5 , 6 ) --> foo( 4 , 5 )
          ^--^

> 
>  Rewriter.RemoveText(
>    SourceRange(
>      /*TODO*/,
>      callExpr->getArg(1)->getLocEnd()));
> 
> Thanks,
> Stephan
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