[cfe-dev] Retrieve variable name

[Alberto Barbaro]

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
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>>
>
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