[cfe-dev] Retrieve variable name

[Alberto Barbaro]

Hi,
I hope this can help someone. I solved in this way:

Expr *e = (dyn_cast<ImplicitCastExpr>(d->getInit()))->getSubExpr(); //
return an object that points to b

dyn_cast<DeclRefExpr>(e)->getNameInfo().getAsString(); //this return b

Thanks for your help,
Alberto

2015-01-08 11:19 GMT+00:00 Alberto Barbaro <barbaro.alberto at gmail.com>:

> Yes yes, I'll do it.
>
> Thanks,
> Alberto
> On 8 Jan 2015 11:18, "Manuel Klimek" <klimek at google.com> wrote:
>
>> 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
>>>>>
>>>>
>>>
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