[cfe-dev] How to distinguish explicitly specified method in call

[George Burgess IV via cfe-dev]

Looks like MemberExpr carries that information around with it; you can
access it via `MemberExpr::hasQualifier` and `MemberExpr::getQualifier`. :)

On Fri, May 13, 2016 at 4:59 AM, Andre Vehreschild via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> Hi all,
>
> suppose I have these classes:
>
> #include <iostream>
> struct A {
> virtual void method1() {
>   std::cout << "A::method1()\n";
> }
> };
> struct B: A {
> void method1() {
>   std::cout << "B::method1()\n";
> }
> };
> int main() {
>   A* o = new B();
>   o->method1();       // <-
>   o->A::method1();  // <- Look identical in AST dump.
>   return 0;
> }
> In the AST-dump this is printed as (fragment):
>     |-CXXMemberCallExpr 0x80560210 <line:14:3, col:14> 'void'
>     | `-MemberExpr 0x805601ec <col:3, col:6> '<bound member function
> type>' ->method1 0x8055e8b0
>     |   `-ImplicitCastExpr 0x805601e0 <col:3> 'struct A *' <LValueToRValue>
>     |     `-DeclRefExpr 0x805601c8 <col:3> 'struct A *' lvalue Var
> 0x8055fc28 'o' 'struct A *'
>     |-CXXMemberCallExpr 0x805602a0 <line:15:3, col:17> 'void'
>     | `-MemberExpr 0x8056026c <col:3, col:9> '<bound member function
> type>' ->method1 0x8055e8b0
>     |   `-ImplicitCastExpr 0x80560258 <col:3> 'struct A *' <LValueToRValue>
>     |     `-DeclRefExpr 0x8056022c <col:3> 'struct A *' lvalue Var
> 0x8055fc28 'o' 'struct A *'
>
> to me both look the same, but clang is able to distinguish them when
> building the executable. Can you explain how this
> is done, or where I have to look to get a clue?
>
> Your help is very much appreciated.
>
> Regards,
>    Andre
>
>
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>
>
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