fbee4a0c79
Implement all of P1825R0:
- implicitly movable entity can be an rvalue reference to non-volatile
automatic object.
- operand of throw-expression can be a function or catch-clause parameter
(support for function parameter has already been implemented).
- in the first overload resolution, the selected function no need to be
a constructor.
- in the first overload resolution, the first parameter of the selected
function no need to be an rvalue reference to the object's type.
This patch also removes the diagnostic `-Wreturn-std-move-in-c++11`.
Differential Revision: https://reviews.llvm.org/D88220
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
// RUN: %clang_cc1 -std=c++20 -fsyntax-only -fcxx-exceptions -verify=cxx20 %s
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// RUN: %clang_cc1 -std=c++17 -fsyntax-only -fcxx-exceptions -verify=cxx11_14_17 %s
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// RUN: %clang_cc1 -std=c++14 -fsyntax-only -fcxx-exceptions -verify=cxx11_14_17 %s
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// RUN: %clang_cc1 -std=c++11 -fsyntax-only -fcxx-exceptions -verify=cxx11_14_17 %s
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// cxx20-no-diagnostics
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// Throwing
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namespace test_throwing {
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class Widget {
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public:
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Widget(Widget &&);
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Widget(const Widget &) = delete;
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};
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void seven(Widget w) {
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throw w; // Clang already do this implicit move before -std=c++20
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}
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} // namespace test_throwing
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// Non-constructor conversion
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namespace test_non_constructor_conversion {
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class Widget {};
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struct To {
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operator Widget() const & = delete; // cxx11_14_17-note {{'operator Widget' has been explicitly marked deleted here}}
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operator Widget() &&;
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};
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Widget nine() {
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To t;
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return t; // cxx11_14_17-error {{conversion function from 'test_non_constructor_conversion::To' to 'test_non_constructor_conversion::Widget' invokes a deleted function}}
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}
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} // namespace test_non_constructor_conversion
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// By-value sinks
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namespace test_by_value_sinks {
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class Widget {
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public:
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Widget();
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Widget(Widget &&);
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Widget(const Widget &) = delete; // cxx11_14_17-note {{'Widget' has been explicitly marked deleted here}}
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};
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struct Fowl {
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Fowl(Widget); // cxx11_14_17-note {{passing argument to parameter here}}
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};
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Fowl eleven() {
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Widget w;
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return w; // cxx11_14_17-error {{call to deleted constructor of 'test_by_value_sinks::Widget'}}
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}
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} // namespace test_by_value_sinks
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// Slicing
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namespace test_slicing {
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class Base {
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public:
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Base();
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Base(Base &&);
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Base(Base const &) = delete; // cxx11_14_17-note {{'Base' has been explicitly marked deleted here}}
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};
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class Derived : public Base {};
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Base thirteen() {
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Derived result;
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return result; // cxx11_14_17-error {{call to deleted constructor of 'test_slicing::Base'}}
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}
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} // namespace test_slicing
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