c732aba9a9
- Diagnose attempts to add default arguments to templates (or member
functions of templates) after the initial declaration (DR217).
- Improve diagnostics when a default argument is redefined. Now, the
note will always point at the place where the default argument was
previously defined, rather than pointing to the most recent
declaration of the function.
llvm-svn: 81548
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
// RUN: clang-cc -fsyntax-only -verify %s
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struct S { };
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template<typename T> void f1(T a, T b = 10) { } // expected-error{{cannot initialize 'b' with an rvalue of type 'int'}}
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template<typename T> void f2(T a, T b = T()) { }
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template<typename T> void f3(T a, T b = T() + T()); // expected-error{{invalid operands to binary expression ('struct S' and 'struct S')}}
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void g() {
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f1(10);
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f1(S()); // expected-note{{in instantiation of default function argument expression for 'f1<struct S>' required here}}
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f2(10);
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f2(S());
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f3(10);
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f3(S()); // expected-note{{in instantiation of default function argument expression for 'f3<struct S>' required here}}
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}
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template<typename T> struct F {
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F(T t = 10); // expected-error{{cannot initialize 't' with an rvalue of type 'int'}}
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void f(T t = 10); // expected-error{{cannot initialize 't' with an rvalue of type 'int'}}
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};
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struct FD : F<int> { };
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void g2() {
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F<int> f;
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FD fd;
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}
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void g3(F<int> f, F<struct S> s) {
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f.f();
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s.f(); // expected-note{{in instantiation of default function argument expression for 'f<struct S>' required here}}
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F<int> f2;
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F<S> s2; // expected-note{{in instantiation of default function argument expression for 'F<struct S>' required here}}
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}
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template<typename T> struct G {
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G(T) {}
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};
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void s(G<int> flags = 10) { }
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// Test default arguments
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template<typename T>
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struct X0 {
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void f(T = T()); // expected-error{{no matching}}
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};
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template<typename U>
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void X0<U>::f(U) { }
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void test_x0(X0<int> xi) {
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xi.f();
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xi.f(17);
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}
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struct NotDefaultConstructible { // expected-note{{candidate}}
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NotDefaultConstructible(int); // expected-note{{candidate}}
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};
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void test_x0_not_default_constructible(X0<NotDefaultConstructible> xn) {
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xn.f(NotDefaultConstructible(17));
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xn.f(42);
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xn.f(); // expected-note{{in instantiation of default function argument}}
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}
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