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-rw-r--r--clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p6.cpp42
1 files changed, 18 insertions, 24 deletions
diff --git a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p6.cpp b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p6.cpp
index e383bc09226..1a6dc9ecfb5 100644
--- a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p6.cpp
+++ b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p6.cpp
@@ -10,7 +10,7 @@ namespace M {
struct NonLiteral {
NonLiteral() {}
- NonLiteral(int) {}
+ NonLiteral(int) {} // expected-note 2{{here}}
operator int() const { return 0; }
};
struct Literal {
@@ -19,7 +19,7 @@ struct Literal {
};
struct S {
- virtual int ImplicitlyVirtual();
+ virtual int ImplicitlyVirtual() const;
};
struct T {};
@@ -27,48 +27,42 @@ template<typename T> struct ImplicitVirtualFromDependentBase : T {
constexpr int ImplicitlyVirtual() { return 0; }
};
-// FIXME: Can't test this until we have function invocation substitution
-#if 0
-constexpr int a = ImplicitVirtualFromDependentBase<S>().ImplicitlyVirtual(); // desired-error {{not a constant expression}}
+constexpr int a = ImplicitVirtualFromDependentBase<S>().ImplicitlyVirtual(); // expected-error {{constant expression}} expected-note {{cannot evaluate virtual function call}}
constexpr int b = ImplicitVirtualFromDependentBase<T>().ImplicitlyVirtual(); // ok
-#endif
+constexpr int c = ImplicitVirtualFromDependentBase<S>().ImplicitVirtualFromDependentBase<S>::ImplicitlyVirtual();
template<typename R> struct ConstexprMember {
constexpr R F() { return 0; }
};
-// FIXME: Can't test this until we have function invocation substitution
-#if 0
-constexpr int c = ConstexprMember<int>().F(); // ok
-constexpr int d = ConstexprMember<NonLiteral>().F(); // desired-error {{not a constant expression}}
-#endif
+constexpr int d = ConstexprMember<int>().F(); // ok
+constexpr int e = ConstexprMember<NonLiteral>().F(); // expected-error {{constant expression}}
-template<typename ...P> struct ConstexprCtor { // expected-note 2{{no constexpr constructors}}
- constexpr ConstexprCtor(P...); // expected-note {{constructor template instantiation is not constexpr because 1st parameter type 'NonLiteral' is not a literal type}} \
- expected-note {{constructor template instantiation is not constexpr because 2nd parameter type 'NonLiteral' is not a literal type}}
+template<typename ...P> struct ConstexprCtor {
+ constexpr ConstexprCtor(P...) {}
};
-constexpr ConstexprCtor<> f1(); // ok
-constexpr ConstexprCtor<int> f2(); // ok
-constexpr ConstexprCtor<NonLiteral> f3(); // expected-error {{not a literal type}}
-constexpr ConstexprCtor<int, NonLiteral> f4(); // expected-error {{not a literal type}}
+constexpr ConstexprCtor<> f1() { return {}; } // ok
+constexpr ConstexprCtor<int> f2() { return 0; } // ok
+constexpr ConstexprCtor<NonLiteral> f3() { return { 0 }; } // expected-error {{never produces a constant expression}} expected-note {{non-constexpr constructor 'NonLiteral}}
+constexpr ConstexprCtor<int, NonLiteral> f4() { return { 0, 0 }; } // expected-error {{never produces a constant expression}} expected-note {{non-constexpr constructor 'NonLiteral}}
struct VirtBase : virtual S {}; // expected-note {{here}}
namespace TemplateVBase {
template<typename T> struct T1 : virtual Literal { // expected-note {{here}}
- constexpr T1(); // expected-error {{constexpr constructor not allowed in struct with virtual base class}}
+ constexpr T1() {} // expected-error {{constexpr constructor not allowed in struct with virtual base class}}
};
- template<typename T> struct T2 : virtual T { // expected-note {{struct with virtual base class is not a literal type}} expected-note {{here}}
+ template<typename T> struct T2 : virtual T {
// FIXME: This is ill-formed (no diagnostic required).
// We should diagnose it now rather than waiting until instantiation.
- constexpr T2(); // desired-error {{constexpr constructor not allowed in class with virtual base classes}}
+ constexpr T2() {}
};
- constexpr T2<Literal> g2(); // expected-error {{not a literal type}}
+ constexpr T2<Literal> g2() { return {}; }
template<typename T> class T3 : public T { // expected-note {{class with virtual base class is not a literal type}}
public:
constexpr T3() {}
};
- constexpr T3<Literal> g3(); // ok
- constexpr T3<VirtBase> g4(); // expected-error {{not a literal type}}
+ constexpr T3<Literal> g3() { return {}; } // ok
+ constexpr T3<VirtBase> g4() { return {}; } // expected-error {{not a literal type}}
}
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