[cfe-dev] Retrieve variable name

[Manuel Klimek]

Well, you'll need to dyn_cast and look through the implicitcast node, but
apart from that, sounds about right.

On Thu Jan 08 2015 at 10:30:02 AM Alberto Barbaro <barbaro.alberto at gmail.com>
wrote:

> Hi Manuel,
> thanks for your help.
>
> Yes i meant "int main()". Based on what you said I think I should do
> something like: decl->getInit()->getNameInfo()->getName();
>
> Thanks,
> Alberto
>
> 2015-01-08 8:54 GMT+00:00 Manuel Klimek <klimek at google.com>:
>
>> getInit should be/contain a declrefexpr
>>
>> On Wed, Jan 7, 2015, 21:41 Alberto Barbaro <barbaro.alberto at gmail.com>
>> wrote:
>>
>>> Hi all,
>>> please consider this code:
>>>
>>> int main {
>>>
>>
>> I assume you mean "main()"
>>
>>
>>>    int a = 7;
>>>    int b = a;
>>> }
>>>
>>> I have a Decl object called decl that represents int b = a; If i do
>>> decl->getInit() i can have an Expr pointer that represents a I think. From
>>> there how can i retrieve the variable name 'a'? Maybe using
>>> getNameAsString()? I tried but it didn't work.
>>>
>>
>> As  -ast-dump shows, getInit is a ImplicitCastExpr which has a
>> DeclRefExpr which points to 'a'.
>>
>> $ clang_check -ast-dump /tmp/t.cc --
>> TranslationUnitDecl 0x21c05e0 <<invalid sloc>> <invalid sloc>
>> |-TypedefDecl 0x21c0b20 <<invalid sloc>> <invalid sloc> implicit
>> __int128_t '__int128'
>> |-TypedefDecl 0x21c0b80 <<invalid sloc>> <invalid sloc> implicit
>> __uint128_t 'unsigned __int128'
>> |-TypedefDecl 0x21c0f40 <<invalid sloc>> <invalid sloc> implicit
>> __builtin_va_list '__va_list_tag [1]'
>> `-FunctionDecl 0x21c0fe0 </tmp/t.cc:1:1, line:4:1> line:1:5 main 'int
>> (void)'
>>   `-CompoundStmt 0x21c1240 <col:12, line:4:1>
>>     |-DeclStmt 0x21c1168 <line:2:3, col:12>
>>     | `-VarDecl 0x21c10f0 <col:3, col:11> col:7 used a 'int' cinit
>>     |   `-IntegerLiteral 0x21c1148 <col:11> 'int' 7
>>     `-DeclStmt 0x21c1228 <line:3:3, col:12>
>>       `-VarDecl 0x21c1190 <col:3, col:11> col:7 b 'int' cinit
>>         `-ImplicitCastExpr 0x21c1210 <col:11> 'int' <LValueToRValue>
>>           `-DeclRefExpr 0x21c11e8 <col:11> 'int' lvalue Var 0x21c10f0 'a'
>> 'int'
>>
>>
>>>
>>> Thanks,
>>> Alberto
>>> _______________________________________________
>>> cfe-dev mailing list
>>> cfe-dev at cs.uiuc.edu
>>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/cfe-dev/attachments/20150108/b984c163/attachment.html>