// RUN: %clang_cc1 -fsyntax-only -verify -std=c++2a %s -fexceptions -fcxx-exceptions -Wno-unevaluated-expression
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++2a %s -fexceptions -fcxx-exceptions -Wno-unevaluated-expression -fexperimental-new-constant-interpreter
namespace std {
struct type_info;
}
void f(); // expected-note {{possible target for call}}
void f(int); // expected-note {{possible target for call}}
void g() {
bool b = noexcept(f); // expected-error {{reference to overloaded function could not be resolved; did you mean to call it with no arguments?}}
bool b2 = noexcept(f(0));
}
struct S {
void g(); // expected-note {{possible target for call}}
void g(int); // expected-note {{possible target for call}}
void h() {
bool b = noexcept(this->g); // expected-error {{reference to non-static member function must be called; did you mean to call it with no arguments?}}
bool b2 = noexcept(this->g(0));
}
};
void stmt_expr() {
static_assert(noexcept(({ 0; })));
static_assert(!noexcept(({ throw 0; })));
static_assert(noexcept(({
try {
throw 0;
} catch (...) {
}
0;
})));
static_assert(!noexcept(({
try {
throw 0;
} catch (...) {
throw;
}
0;
})));
static_assert(!noexcept(({
try {
throw 0;
} catch (int) {
}
0;
})));
static_assert(!noexcept(({
if (false) throw 0;
})));
static_assert(noexcept(({
if constexpr (false) throw 0;
})));
static_assert(!noexcept(({
if constexpr (false) throw 0; else throw 1;
})));
static_assert(noexcept(({
if constexpr (true) 0; else throw 1;
})));
}
void vla(bool b) { // expected-note 5{{declared here}}
static_assert(noexcept(static_cast<int(*)[true ? 41 : 42]>(0)), "");
// FIXME: This can't actually throw, but we conservatively assume any VLA
// type can throw for now.
static_assert(!noexcept(static_cast<int(*)[b ? 41 : 42]>(0)), ""); // expected-warning {{variable length arrays in C++ are a Clang extension}} \
expected-note {{function parameter 'b' with unknown value cannot be used in a constant expression}}
static_assert(!noexcept(static_cast<int(*)[b ? throw : 42]>(0)), ""); // expected-warning {{variable length arrays in C++ are a Clang extension}} \
expected-note {{function parameter 'b' with unknown value cannot be used in a constant expression}}
static_assert(!noexcept(reinterpret_cast<int(*)[b ? throw : 42]>(0)), ""); // expected-warning {{variable length arrays in C++ are a Clang extension}} \
expected-note {{function parameter 'b' with unknown value cannot be used in a constant expression}}
static_assert(!noexcept((int(*)[b ? throw : 42])0), ""); // expected-warning {{variable length arrays in C++ are a Clang extension}} \
expected-note {{function parameter 'b' with unknown value cannot be used in a constant expression}}
static_assert(!noexcept((int(*)[b ? throw : 42]){0}), ""); // expected-warning {{variable length arrays in C++ are a Clang extension}} \
expected-note {{function parameter 'b' with unknown value cannot be used in a constant expression}}
}
struct pr_44514 {
// expected-error@+1{{value of type 'void' is not implicitly convertible to 'bool'}}
void foo(void) const &noexcept(f());
};
namespace P1401 {
const int *ptr = nullptr;
void f() noexcept(sizeof(char[2])); // expected-error {{noexcept specifier argument evaluates to 2, which cannot be narrowed to type 'bool'}}
void g() noexcept(sizeof(char));
void h() noexcept(ptr); // expected-error {{conversion from 'const int *' to 'bool' is not allowed in a converted constant expression}}
void i() noexcept(nullptr); // expected-error {{conversion from 'std::nullptr_t' to 'bool' is not allowed in a converted constant expression}}
void j() noexcept(0);
void k() noexcept(1);
void l() noexcept(2); // expected-error {{noexcept specifier argument evaluates to 2, which cannot be narrowed to type 'bool'}}
} // namespace P1401
namespace typeid_ {
template<bool NoexceptConstructor, bool NoexceptDestructor>
struct Polymorphic {
Polymorphic() noexcept(NoexceptConstructor) {}
virtual ~Polymorphic() noexcept(NoexceptDestructor) {}
};
static_assert(noexcept(typeid(Polymorphic<false, false>{}))); // Not evaluated (not glvalue)
static_assert(noexcept(typeid((Polymorphic<true, true>&&) Polymorphic<true, true>{})));
static_assert(!noexcept(typeid((Polymorphic<false, true>&&) Polymorphic<false, true>{})));
static_assert(!noexcept(typeid((Polymorphic<true, false>&&) Polymorphic<true, false>{})));
static_assert(!noexcept(typeid(*&(const Polymorphic<true, true>&) Polymorphic<true, true>{})));
static_assert(!noexcept(typeid(*&(const Polymorphic<false, true>&) Polymorphic<false, true>{})));
static_assert(!noexcept(typeid(*&(const Polymorphic<true, false>&) Polymorphic<true, false>{})));
template<bool B>
struct X {
template<typename T> void f();
};
template<typename T>
void f1() {
X<noexcept(typeid(*T{}))> dependent;
// `dependent` should be type-dependent because the noexcept-expression should be value-dependent
// (it is true if T is int*, false if T is Polymorphic<false, false>* for example)
dependent.f<void>(); // This should need to be `.template f` to parse as a template
// expected-error@-1 {{use 'template' keyword to treat 'f' as a dependent template name}}
}
template<typename... T>
void f2() {
X<noexcept(typeid(*((static_cast<Polymorphic<false, false>*>(nullptr) && ... && T{}))))> dependent;
// X<true> when T...[0] is a type with some operator&& which returns int*
// X<false> when sizeof...(T) == 0
dependent.f<void>();
// expected-error@-1 {{use 'template' keyword to treat 'f' as a dependent template name}}
}
template<typename T>
void f3() {
X<noexcept(typeid(*static_cast<T*>(nullptr)))> dependent;
// X<true> when T is int, X<false> when T is Polymorphic<false, false>
dependent.f<void>();
// expected-error@-1 {{use 'template' keyword to treat 'f' as a dependent template name}}
}
template<typename T>
void f4() {
X<noexcept(typeid(T))> not_dependent;
not_dependent.non_existent();
// expected-error@-1 {{no member named 'non_existent' in 'typeid_::X<true>'}}
}
template<typename T>
void f5() {
X<noexcept(typeid(sizeof(sizeof(T))))> not_dependent;
not_dependent.non_existent();
// expected-error@-1 {{no member named 'non_existent' in 'typeid_::X<true>'}}
}
} // namespace typeid_
namespace GH97453 {
struct UnconstrainedCtor {
int value_;
template <typename T>
constexpr UnconstrainedCtor(T value) noexcept(noexcept(value_ = value))
: value_(static_cast<int>(value)) {}
};
UnconstrainedCtor U(42);
struct X {
void ICE(int that) noexcept(noexcept([that]() {}));
};
} // namespace GH97453
Codebase Browser
llvm