forked from OSchip/llvm-project
114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
// RUN: %clang_cc1 -std=c++11 -verify %s
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// The implicit specialization of a class template specialuzation causes the
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// implicit instantiation of the declarations, but not the definitions or
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// default arguments, of:
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// FIXME: Many omitted cases
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// - scoped member enumerations
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namespace ScopedEnum {
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template<typename T> struct ScopedEnum1 {
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enum class E {
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e = T::error // expected-error {{'double' cannot be used prior to '::'}}
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};
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};
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ScopedEnum1<int> se1; // ok
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template<typename T> struct ScopedEnum2 {
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enum class E : T { // expected-error {{non-integral type 'void *' is an invalid underlying type}}
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e = 0
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};
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};
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ScopedEnum2<void*> se2; // expected-note {{here}}
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template<typename T> struct UnscopedEnum3 {
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enum class E : T {
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e = 4
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};
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int arr[(int)E::e];
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};
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UnscopedEnum3<int> ue3; // ok
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ScopedEnum1<double>::E e1; // ok
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ScopedEnum1<double>::E e2 = decltype(e2)::e; // expected-note {{in instantiation of enumeration 'ScopedEnum::ScopedEnum1<double>::E' requested here}}
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// DR1484 specifies that enumerations cannot be separately instantiated,
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// they will be instantiated with the rest of the template declaration.
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template<typename T>
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int f() {
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enum class E {
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e = T::error // expected-error {{has no members}}
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};
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return (int)E();
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}
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int test1 = f<int>(); // expected-note {{here}}
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template<typename T>
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int g() {
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enum class E {
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e = T::error // expected-error {{has no members}}
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};
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return E::e;
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}
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int test2 = g<int>(); // expected-note {{here}}
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}
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// - static data members
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namespace StaticDataMembers {
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template<typename T>
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struct A {
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static const int n = T::error; // expected-error {{has no members}}
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static inline int m = T::error; // expected-warning {{extension}}
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};
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A<int> ai; // expected-note {{here}}
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}
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// And it cases the implicit instantiations of the definitions of:
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// - unscoped member enumerations
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namespace UnscopedEnum {
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template<typename T> struct UnscopedEnum1 {
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enum E {
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e = T::error // expected-error {{'int' cannot be used prior to '::'}}
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};
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};
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UnscopedEnum1<int> ue1; // expected-note {{here}}
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template<typename T> struct UnscopedEnum2 {
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enum E : T { // expected-error {{non-integral type 'void *' is an invalid underlying type}}
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e = 0
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};
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};
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UnscopedEnum2<void*> ue2; // expected-note {{here}}
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template<typename T> struct UnscopedEnum3 {
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enum E : T {
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e = 4
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};
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int arr[E::e];
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};
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UnscopedEnum3<int> ue3; // ok
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template<typename T>
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int f() {
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enum E {
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e = T::error // expected-error {{has no members}}
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};
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return (int)E();
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}
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int test1 = f<int>(); // expected-note {{here}}
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template<typename T>
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int g() {
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enum E {
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e = T::error // expected-error {{has no members}}
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};
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return E::e;
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}
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int test2 = g<int>(); // expected-note {{here}}
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}
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// FIXME:
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//- - member anonymous unions
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