[cfe-dev] Accessing some particular source locations in the AST

[Mihai Draghicioiu]

Thanks. Both worked. Also, aren't macros already expanded at this point?

On Thu, Sep 18, 2014 at 4:56 AM, Richard Smith <richard at metafoo.co.uk>
wrote:

> On Wed, Sep 17, 2014 at 3:55 PM, Mihai Draghicioiu <
> mihai.draghicioiu at gmail.com> wrote:
>
>> Hi guys. I'm trying to get a SourceLocation for a couple of points in the
>> source. So for:
>>
>> class Foo*<HERE>*:
>>
>
> Lexer::getLocForEndOfToken(RD->getLocation(), 0, /*...*/)
>
>
>> public Bar *<AND HERE>*{
>>
>
> Do you want the location of the open brace, or the location after each
> base specifier? For the base specifiers, iterate over RD->bases() and grab
> the source range. (Use getLocForEndOfToken on the end of the range.) We
> don't directly store the location of the left brace, but you can get an
> approximation of the right thing by scanning forwards through the input
> buffer looking for it (you can be defeated by macros, but that's hard to
> avoid without re-lexing).
>
> Starting from a CXXRecordDecl (which I get from
>> RecursiveASTVisitor::VisitCXXRecordDecl()), currently I am only able to get
>> the location before the *class* keyword (with
>> TagDecl::getInnerLocStart()) and after it (TagDecl::getOuterLocStart()).
>>
>> I've been struggling with this for a while now, and the documentation
>> really isn't helping. There are many missing enums and member functions in
>> the docs. Am I supposed to use the lexer somehow? How? Am I supposed to use
>> VisitTypeLoc()? I dunno, help!
>>
>> This is for a source translation tool that translates a small subset of
>> C++ to JS. So:
>>
>> class Foo: public Bar {
>>     Foo(int x, float y) {
>>
>> Becomes:
>>
>> function Foo(x, y) {
>> ...
>> }
>> // Do some inheritance stuff for Bar
>>
>>
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>>
>>
>
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