test/SemaCXX/decl-expr-ambiguity.cpp

// RUN: clang -fsyntax-only -verify %s 

void f() {
  int a;
  struct S { int m; };
  typedef S *T;

  // Expressions.
  T(a)->m = 7;
  int(a)++; // expected-error {{invalid lvalue in increment/decrement expression}}
  __extension__ int(a)++; // expected-error {{invalid lvalue in increment/decrement expression}}
  typeof(int)(a,5)<<a; // expected-error {{function-style cast to a builtin type can only take one argument}}
  void(a), ++a; // expected-warning {{statement was disambiguated as expression}} expected-warning {{expression result unused}}
  if (int(a)+1) {}

  // Declarations.
  T(*d)(int(p)); // expected-warning {{statement was disambiguated as declaration}} expected-error {{previous definition is here}}
  T(d)[5]; // expected-warning {{statement was disambiguated as declaration}} expected-error {{redefinition of 'd'}}
  typeof(int[])(f) = { 1, 2 }; // expected-warning {{statement was disambiguated as declaration}}
  void(b)(int);
  int(d2) __attribute__(()); // expected-warning {{statement was disambiguated as declaration}}
  if (int(a)=1) {}
}