52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
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// RUN: %clang_cc1 -std=c++1z -verify %s -fexceptions -fcxx-exceptions -Wno-dynamic-exception-spec
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struct X {};
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struct Y : X {};
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using A = void (*)() noexcept;
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using B = void (*)();
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using C = void (X::*)() noexcept;
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using D = void (X::*)();
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using E = void (Y::*)() noexcept;
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using F = void (Y::*)();
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void f(A a, B b, C c, D d, E e, F f, bool k) {
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a = k ? a : b; // expected-error {{incompatible function pointer types assigning to 'A' (aka 'void (*)() noexcept') from 'void (*)()'}}
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b = k ? a : b;
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c = k ? c : d; // expected-error {{different exception specifications}}
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d = k ? c : d;
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e = k ? c : f; // expected-error {{different exception specifications}}
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e = k ? d : e; // expected-error {{different exception specifications}}
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f = k ? c : f;
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f = k ? d : e;
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const A ak = a;
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const B bk = b;
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const A &ak2 = k ? ak : ak;
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const A &ak3 = k ? ak : bk; // expected-error {{could not bind}}
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const B &bk3 = k ? ak : bk;
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}
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namespace dynamic_exception_spec {
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// Prior to P0012, we had:
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// "[...] the target entity shall allow at least the exceptions allowed
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// by the source value in the assignment or initialization"
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//
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// There's really only one way we can coherently apply this to conditional
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// expressions: this must hold no matter which branch was taken.
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using X = void (*)() throw(int);
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using Y = void (*)() throw(float);
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using Z = void (*)() throw(int, float);
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void g(X x, Y y, Z z, bool k) {
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x = k ? X() : Y(); // expected-warning {{not superset}}
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y = k ? X() : Y(); // expected-warning {{not superset}}
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z = k ? X() : Y();
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x = k ? x : y; // expected-warning {{not superset}}
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y = k ? x : y; // expected-warning {{not superset}}
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z = k ? x : y;
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}
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}
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