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4777eb2954
Knowing the type of more dependent expressions means we can diagnose more errors at template parsing rather than instantiation time. Such templates are IFNDR, so this is a QoI improvement. I hadn't anticipated this in the original patch, so had no test.
63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++98 %s
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
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// Tests that dependent expressions are always allowed, whereas non-dependent
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// are checked as usual.
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#include <stddef.h>
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// Fake typeid, lacking a typeinfo header.
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namespace std { class type_info {}; }
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struct dummy {}; // expected-note 3 {{candidate constructor (the implicit copy constructor)}}
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#if __cplusplus >= 201103L // C++11 or later
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// expected-note@-2 3 {{candidate constructor (the implicit move constructor) not viable}}
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#endif
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template<typename T>
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int f0(T x) {
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return (sizeof(x) == sizeof(int))? 0 : (sizeof(x) == sizeof(double))? 1 : 2;
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}
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template <typename T, typename U>
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T f1(T t1, U u1, int i1, T** tpp)
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{
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T t2 = i1;
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t2 = i1 + u1;
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++u1;
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u1++;
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int i2 = u1;
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i1 = t1[u1];
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i1 *= t1;
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i1(u1, t1); // error
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u1(i1, t1);
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U u2 = (T)i1;
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static_cast<void>(static_cast<U>(reinterpret_cast<T>(
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dynamic_cast<U>(const_cast<T>(i1)))));
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new U(i1, t1);
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new int(t1, u1);
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new (t1, u1) int;
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delete t1;
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dummy d1 = sizeof(t1); // expected-error {{no viable conversion}}
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dummy d2 = offsetof(T, foo); // expected-error {{no viable conversion}}
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dummy d3 = __alignof(u1); // expected-error {{no viable conversion}}
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i1 = typeid(t1); // expected-error {{assigning to 'int' from incompatible type 'const std::type_info'}}
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i1 = tpp[0].size(); // expected-error {{'T *' is not a structure or union}}
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return u1;
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}
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template<typename T>
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void f2(__restrict T x) {} // expected-note {{substitution failure [with T = int]: restrict requires a pointer or reference ('int' is invalid}}
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void f3() {
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f2<int*>(0);
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f2<int>(0); // expected-error {{no matching function for call to 'f2'}}
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}
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