decl-expr-ambiguity.cpp revision 4dabe96fc9c5333bbcb6e36114bca95160967e26 
1// RUN: clang-cc -fsyntax-only -verify -pedantic-errors %s
2
3void f() {
4  int a;
5  struct S { int m; };
6  typedef S *T;
7
8  // Expressions.
9  T(a)->m = 7;
10  int(a)++; // expected-error {{expression is not assignable}}
11  __extension__ int(a)++; // expected-error {{expression is not assignable}}
12  __typeof(int)(a,5)<<a; // expected-error {{function-style cast to a builtin type can only take one argument}}
13  void(a), ++a; // expected-warning {{expression result unused}}
14  if (int(a)+1) {}
15  for (int(a)+1;;) {} // expected-warning {{expression result unused}}
16  a = sizeof(int()+1);
17  a = sizeof(int(1));
18  typeof(int()+1) a2; // expected-error {{extension used}}
19  (int(1)); // expected-warning {{expression result unused}}
20
21  // type-id
22  (int())1; // expected-error {{C-style cast from 'int' to 'int ()' is not allowed}}
23
24  // Declarations.
25  int fd(T(a)); // expected-warning {{parentheses were disambiguated as a function declarator}}
26  T(*d)(int(p)); // expected-warning {{parentheses were disambiguated as a function declarator}} expected-note {{previous definition is here}}
27  T(d)[5]; // expected-error {{redefinition of 'd'}}
28  typeof(int[])(f) = { 1, 2 }; // expected-error {{extension used}}
29  void(b)(int);
30  int(d2) __attribute__(());
31  if (int(a)=1) {}
32  int(d3(int()));
33}
34
35class C { };
36void fn(int(C)) { } // void fn(int(*fp)(C c)) { } expected-note{{candidate function}}
37                    // not: void fn(int C);
38int g(C);
39
40void foo() {
41  fn(1); // expected-error {{no matching function}}
42  fn(g); // OK
43}
44