Files
clang-p2996/clang/test/SemaCXX/invalid-template-base-specifier.cpp
Richard Smith da986511fb Revert "DR2064: decltype(E) is only a dependent type if E is type-dependent, not
if E is merely instantiation-dependent."

This change leaves us unable to distinguish between different function
templates that differ in only instantiation-dependent ways, for example

template<typename T> decltype(int(T())) f();
template<typename T> decltype(int(T(0))) f();

We'll need substantially better support for types that are
instantiation-dependent but not dependent before we can go ahead with
this change.

This reverts commit e3065ce238.
2021-01-19 12:48:40 -08:00

29 lines
1006 B
C++

// RUN: %clang_cc1 -frecovery-ast -verify %s
bool Foo(int *); // expected-note 3{{candidate function not viable}}
template <typename T>
struct Crash : decltype(Foo(T())) { // expected-error {{no matching function for call to 'Foo'}}
Crash(){};
};
void test() { Crash<int>(); } // expected-note {{in instantiation of template class}}
template <typename T>
using Alias = decltype(Foo(T())); // expected-error {{no matching function for call to 'Foo'}}
template <typename T>
struct Crash2 : decltype(Alias<T>()) { // expected-note {{in instantiation of template type alias 'Alias' requested here}}
Crash2(){};
};
void test2() { Crash2<int>(); } // expected-note {{in instantiation of template class 'Crash2<int>' requested here}}
template <typename T>
class Base {};
template <typename T>
struct Crash3 : Base<decltype(Foo(T()))> { // expected-error {{no matching function for call to 'Foo'}}
Crash3(){};
};
void test3() { Crash3<int>(); } // expected-note {{in instantiation of template class}}