clang/test/SemaTemplate/canonical-expr-type.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2
   3 void f();
   4
   5 // Test typeof(expr) canonicalization
   6 template<typename T>
   7 void f0(T x, __typeof__(f(x)) y) { } // expected-note{{previous}}
   8
   9 template<typename T>
  10 void f0(T x, __typeof__((f)(x)) y) { }
  11
  12 template<typename U>
  13 void f0(U u, __typeof__(f(u))) { } // expected-error{{redefinition}}
  14
  15 // Test insane typeof(expr) overload set canonicalization
  16 void f(int);
  17 void f(double);
  18
  19 template<typename T, T N>
  20 void f0a(T x, __typeof__(f(N)) y) { } // expected-note{{previous}}
  21
  22 void f(int);
  23
  24 template<typename T, T N>
  25 void f0a(T x, __typeof__(f(N)) y) { } // expected-error{{redefinition}}
  26
  27 void f(float);
  28
  29 // Test dependently-sized array canonicalization
  30 template<typename T, int N, int M>
  31 void f1(T (&array)[N + M]) { } // expected-note{{previous}}
  32
  33 template<typename T, int N, int M>
  34 void f1(T (&array)[M + N]) { }
  35
  36 template<typename T, int M, int N>
  37 void f1(T (&array)[M + N]) { } // expected-error{{redefinition}}
  38
  39 // Test dependently-sized extended vector type canonicalization
  40 template<typename T, int N, int M>
  41 struct X2 {
  42   typedef T __attribute__((ext_vector_type(N))) type1;
  43   typedef T __attribute__((ext_vector_type(M))) type2;
  44   typedef T __attribute__((ext_vector_type(N))) type3;
  45
  46   void f0(type1); // expected-note{{previous}}
  47   void f0(type2);
  48   void f0(type3); // expected-error{{redeclared}}
  49 };
  50
  51 // Test canonicalization doesn't conflate different literal suffixes.
  52 template<typename T> void literal_suffix(int (&)[sizeof(T() + 0)]) {}
  53 template<typename T> void literal_suffix(int (&)[sizeof(T() + 0L)]) {}
  54 template<typename T> void literal_suffix(int (&)[sizeof(T() + 0LL)]) {}
  55 template<typename T> void literal_suffix(int (&)[sizeof(T() + 0.f)]) {}
  56 template<typename T> void literal_suffix(int (&)[sizeof(T() + 0.)]) {}
  57 template<typename T> void literal_suffix(int (&)[sizeof(T() + 0.l)]) {}