forked from OSchip/llvm-project
47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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template<template<typename T> class MetaFun, typename Value>
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struct apply {
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typedef typename MetaFun<Value>::type type;
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};
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template<class T>
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struct add_pointer {
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typedef T* type;
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};
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template<class T>
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struct add_reference {
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typedef T& type;
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};
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int i;
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apply<add_pointer, int>::type ip = &i;
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apply<add_reference, int>::type ir = i;
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apply<add_reference, float>::type fr = i; // expected-error{{non-const lvalue reference to type 'float' cannot bind to a value of unrelated type 'int'}}
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// Template template parameters
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template<int> struct B; // expected-note{{has a different type 'int'}}
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template<typename T,
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template<T Value> class X> // expected-error{{cannot have type 'float'}} \
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// expected-note{{with type 'long'}}
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struct X0 { };
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X0<int, B> x0b1;
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X0<float, B> x0b2; // expected-note{{while substituting}}
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X0<long, B> x0b3; // expected-error{{template template argument has different template parameters}}
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template<template<int V> class TT> // expected-note{{parameter with type 'int'}}
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struct X1 { };
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template<typename T, template<T V> class TT>
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struct X2 {
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X1<TT> x1; // expected-error{{has different template parameters}}
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};
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template<int V> struct X3i { };
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template<long V> struct X3l { }; // expected-note{{different type 'long'}}
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X2<int, X3i> x2okay;
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X2<long, X3l> x2bad; // expected-note{{instantiation}}
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