File: error23.C

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gcc-arm-none-eabi 15%3A8-2019-q3-1
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// PR c++/29632

struct nullptr_type {

  nullptr_type ( void ) {}

  template < typename T >
  operator T* ( void ) const {
    return ( 0 );
  }
} const nullptr_ob;

int main ( void ) {
  0 == nullptr_ob; // { dg-error "match" }
}