126 lines
5.2 KiB
C++
126 lines
5.2 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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template<typename T>
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const T& min(const T&, const T&); // expected-note{{candidate template ignored: deduced conflicting types for parameter 'T' ('int' vs. 'long')}}
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void test_min() {
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(void)min(1, 2l); // expected-error{{no matching function for call to 'min'}}
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}
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template<typename R, typename T>
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R *dyn_cast(const T&); // expected-note{{candidate template ignored: couldn't infer template argument 'R'}}
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void test_dyn_cast(int* ptr) {
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(void)dyn_cast(ptr); // expected-error{{no matching function for call to 'dyn_cast'}}
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}
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template<int I, typename T>
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void get(const T&); // expected-note{{candidate template ignored: invalid explicitly-specified argument for template parameter 'I'}}
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template<template<class T> class, typename T>
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void get(const T&); // expected-note{{candidate template ignored: invalid explicitly-specified argument for 1st template parameter}}
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void test_get(void *ptr) {
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get<int>(ptr); // expected-error{{no matching function for call to 'get'}}
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}
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template<typename T>
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typename T::type get_type(const T&); // expected-note{{candidate template ignored: substitution failure [with T = int *]: type 'int *' cannot be used prior to '::'}}
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template<typename T>
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void get_type(T *, int[(int)sizeof(T) - 9] = 0); // expected-note{{candidate template ignored: substitution failure [with T = int]: array size is negative}}
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void test_get_type(int *ptr) {
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(void)get_type(ptr); // expected-error{{no matching function for call to 'get_type'}}
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}
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struct X {
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template<typename T>
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const T& min(const T&, const T&); // expected-note{{candidate template ignored: deduced conflicting types for parameter 'T' ('int' vs. 'long')}}
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};
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void test_X_min(X x) {
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(void)x.min(1, 2l); // expected-error{{no matching member function for call to 'min'}}
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}
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namespace boost {
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template<bool, typename = void> struct enable_if {};
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template<typename T> struct enable_if<true, T> { typedef T type; };
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}
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template<typename T> typename boost::enable_if<sizeof(T) == 4, int>::type if_size_4(); // expected-note{{candidate template ignored: disabled by 'enable_if' [with T = char]}}
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int k = if_size_4<char>(); // expected-error{{no matching function}}
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namespace llvm {
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template<typename Cond, typename T = void> struct enable_if : boost::enable_if<Cond::value, T> {};
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}
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template<typename T> struct is_int { enum { value = false }; };
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template<> struct is_int<int> { enum { value = true }; };
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template<typename T> typename llvm::enable_if<is_int<T> >::type if_int(); // expected-note{{candidate template ignored: disabled by 'enable_if' [with T = char]}}
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void test_if_int() {
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if_int<char>(); // expected-error{{no matching function}}
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}
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template<typename T> struct NonTemplateFunction {
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typename boost::enable_if<sizeof(T) == 4, int>::type f(); // expected-error{{no type named 'type' in 'boost::enable_if<false, int>'; 'enable_if' cannot be used to disable this declaration}}
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};
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NonTemplateFunction<char> NTFC; // expected-note{{here}}
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namespace NS1 {
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template <class A>
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class array {};
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}
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namespace NS2 {
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template <class A>
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class array {};
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}
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template <class A>
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void foo(NS2::array<A>); // expected-note{{candidate template ignored: could not match 'NS2::array' against 'NS1::array'}}
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void test() {
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foo(NS1::array<int>()); // expected-error{{no matching function for call to 'foo'}}
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}
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namespace std {
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template<bool, typename = void> struct enable_if {};
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template<typename T> struct enable_if<true, T> { typedef T type; };
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template<typename T, T V> struct integral_constant { static const T value = V; };
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typedef integral_constant<bool, false> false_type;
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typedef integral_constant<bool, true> true_type;
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};
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namespace PR15673 {
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template<typename T>
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struct a_trait : std::false_type {};
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template<typename T,
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typename Requires = typename std::enable_if<a_trait<T>::value>::type> // expected-warning {{C++11 extension}}
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// expected-note@-1 {{candidate template ignored: disabled by 'enable_if' [with T = int]}}
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void foo() {}
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void bar() { foo<int>(); } // expected-error {{no matching function for call to 'foo'}}
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template<typename T>
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struct some_trait : std::false_type {};
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// FIXME: It would be nice to tunnel the 'disabled by enable_if' diagnostic through here.
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template<typename T>
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struct a_pony : std::enable_if<some_trait<T>::value> {};
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template<typename T,
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typename Requires = typename a_pony<T>::type> // expected-warning {{C++11 extension}}
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// FIXME: The source location here is poor.
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void baz() { } // expected-note {{candidate template ignored: substitution failure [with T = int]: no type named 'type' in 'PR15673::a_pony<int>'}}
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void quux() { baz<int>(); } // expected-error {{no matching function for call to 'baz'}}
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// FIXME: This note doesn't make it clear which candidate we rejected.
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template <typename T>
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using unicorns = typename std::enable_if<some_trait<T>::value>::type; // expected-warning {{C++11 extension}}
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// expected-note@-1 {{candidate template ignored: disabled by 'enable_if' [with T = int]}}
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template<typename T,
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typename Requires = unicorns<T> > // expected-warning {{C++11 extension}}
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void wibble() {}
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void wobble() { wibble<int>(); } // expected-error {{no matching function for call to 'wibble'}}
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}
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