[cfe-dev] Pinpointing VarDecl Location

[Hans Wennborg]

On Fri, Jul 25, 2014 at 9:04 AM, Uri Mann <umann at symantec.com> wrote:
> Given:
>
> void f() {
>   int a, b, c;
> }
>
> I’m wondering if there’s a way to find the SourceLocation and/or SourceRange
> of a, b and c?
>
> Using VarDecl::getSourceRange(), VarDecl::getStartLoc(), etc I get the same
> values for all instance between the type (int) and the ;.

Looking at the ast dump, it seems like a, b and c have the same start
loc, but different end locations. Maybe you can use that?

$ echo 'void f() { int a, b, c; }' | clang -cc1 -ast-dump -
TranslationUnitDecl 0x5fa3fe0 <<invalid sloc>> <invalid sloc>
|-TypedefDecl 0x5fa44e0 <<invalid sloc>> <invalid sloc> implicit
__int128_t '__int128'
|-TypedefDecl 0x5fa4540 <<invalid sloc>> <invalid sloc> implicit
__uint128_t 'unsigned __int128'
|-TypedefDecl 0x5fa4890 <<invalid sloc>> <invalid sloc> implicit
__builtin_va_list '__va_list_tag [1]'
`-FunctionDecl 0x5fa4930 <<stdin>:1:1, col:25> col:6 f 'void ()'
  `-CompoundStmt 0x5fa4b50 <col:10, col:25>
    `-DeclStmt 0x5fa4b38 <col:12, col:23>
      |-VarDecl 0x5fa49e0 <col:12, col:16> col:16 a 'int'
      |-VarDecl 0x5fa4a50 <col:12, col:19> col:19 b 'int'
      `-VarDecl 0x5fa4ac0 <col:12, col:22> col:22 c 'int'

 - Hans