[cfe-dev] Retrieve variable name

[Manuel Klimek]

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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