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[clang][Interp] Handle PseudoObjectExprs
Evaluate all the semantic expressions.
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// RUN: %clang_cc1 -std=c++2a -verify=both,ref %s -fcxx-exceptions | ||
// RUN: %clang_cc1 -std=c++2a -verify=both,expected %s -fcxx-exceptions -fexperimental-new-constant-interpreter | ||
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namespace std { | ||
struct strong_ordering { // both-note 6{{candidate}} | ||
int n; | ||
constexpr operator int() const { return n; } | ||
static const strong_ordering less, equal, greater; | ||
}; | ||
constexpr strong_ordering strong_ordering::less{-1}, | ||
strong_ordering::equal{0}, strong_ordering::greater{1}; | ||
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struct weak_ordering { | ||
int n; | ||
constexpr weak_ordering(int n) : n(n) {} | ||
constexpr weak_ordering(strong_ordering o) : n(o.n) {} | ||
constexpr operator int() const { return n; } | ||
static const weak_ordering less, equivalent, greater; | ||
}; | ||
constexpr weak_ordering weak_ordering::less{-1}, | ||
weak_ordering::equivalent{0}, weak_ordering::greater{1}; | ||
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struct partial_ordering { | ||
double d; | ||
constexpr partial_ordering(double d) : d(d) {} | ||
constexpr partial_ordering(strong_ordering o) : d(o.n) {} | ||
constexpr partial_ordering(weak_ordering o) : d(o.n) {} | ||
constexpr operator double() const { return d; } | ||
static const partial_ordering less, equivalent, greater, unordered; | ||
}; | ||
constexpr partial_ordering partial_ordering::less{-1}, | ||
partial_ordering::equivalent{0}, partial_ordering::greater{1}, | ||
partial_ordering::unordered{__builtin_nan("")}; | ||
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static_assert(!(partial_ordering::unordered < 0)); | ||
static_assert(!(partial_ordering::unordered == 0)); | ||
static_assert(!(partial_ordering::unordered > 0)); | ||
} | ||
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namespace Deletedness { | ||
struct A { | ||
std::strong_ordering operator<=>(const A&) const; | ||
}; | ||
struct B { | ||
bool operator==(const B&) const; | ||
bool operator<(const B&) const; | ||
}; | ||
struct C { | ||
std::strong_ordering operator<=>(const C&) const = delete; // both-note 2{{deleted}} | ||
}; | ||
struct D1 { | ||
bool operator==(const D1&) const; | ||
std::strong_ordering operator<=>(int) const; // both-note 2{{function not viable}} both-note 2{{function (with reversed parameter order) not viable}} | ||
bool operator<(int) const; // both-note 2{{function not viable}} | ||
}; | ||
struct D2 { | ||
bool operator<(const D2&) const; | ||
std::strong_ordering operator<=>(int) const; // both-note 2{{function not viable}} both-note 2{{function (with reversed parameter order) not viable}} | ||
bool operator==(int) const; // both-note 2{{function not viable}} | ||
}; | ||
struct E { | ||
bool operator==(const E&) const; | ||
bool operator<(const E&) const = delete; // both-note 2{{deleted}} | ||
}; | ||
struct F { | ||
std::strong_ordering operator<=>(const F&) const; // both-note 2{{candidate}} | ||
std::strong_ordering operator<=>(F) const; // both-note 2{{candidate}} | ||
}; | ||
struct G1 { | ||
bool operator==(const G1&) const; | ||
void operator<(const G1&) const; | ||
}; | ||
struct G2 { | ||
void operator==(const G2&) const; | ||
bool operator<(const G2&) const; | ||
}; | ||
struct H { | ||
void operator<=>(const H&) const; | ||
}; | ||
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// both-note@#base {{deleted comparison function for base class 'C'}} | ||
// both-note@#base {{no viable three-way comparison function for base class 'D1'}} | ||
// both-note@#base {{three-way comparison cannot be synthesized because there is no viable function for '<' comparison}} | ||
// both-note@#base {{no viable 'operator==' for base class 'D2'}} | ||
// both-note@#base {{three-way comparison cannot be synthesized because there is no viable function for '==' comparison}} | ||
// both-note@#base {{deleted comparison function for base class 'E'}} | ||
// both-note@#base {{implied comparison for base class 'F' is ambiguous}} | ||
template<typename T> struct Cmp : T { // #base | ||
std::strong_ordering operator<=>(const Cmp&) const = default; // #cmp both-note 5{{here}} | ||
}; | ||
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void use(...); | ||
void f() { | ||
use( | ||
Cmp<A>() <=> Cmp<A>(), | ||
Cmp<B>() <=> Cmp<B>(), | ||
Cmp<C>() <=> Cmp<C>(), // both-error {{deleted}} | ||
Cmp<D1>() <=> Cmp<D1>(), // both-error {{deleted}} | ||
Cmp<D2>() <=> Cmp<D2>(), // both-error {{deleted}} | ||
Cmp<E>() <=> Cmp<E>(), // both-error {{deleted}} | ||
Cmp<F>() <=> Cmp<F>(), // both-error {{deleted}} | ||
// FIXME: The following three errors are not very good. | ||
// both-error@#cmp {{value of type 'void' is not contextually convertible to 'bool'}} | ||
Cmp<G1>() <=> Cmp<G1>(), // both-note-re {{in defaulted three-way comparison operator for '{{.*}}Cmp<{{.*}}G1>' first required here}}j | ||
// both-error@#cmp {{value of type 'void' is not contextually convertible to 'bool'}} | ||
Cmp<G2>() <=> Cmp<G2>(), // both-note-re {{in defaulted three-way comparison operator for '{{.*}}Cmp<{{.*}}G2>' first required here}}j | ||
// both-error@#cmp {{no matching conversion for static_cast from 'void' to 'std::strong_ordering'}} | ||
Cmp<H>() <=> Cmp<H>(), // both-note-re {{in defaulted three-way comparison operator for '{{.*}}Cmp<{{.*}}H>' first required here}}j | ||
0 | ||
); | ||
} | ||
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// both-note@#arr {{deleted comparison function for member 'arr'}} | ||
// both-note@#arr {{no viable three-way comparison function for member 'arr'}} | ||
// both-note@#arr {{three-way comparison cannot be synthesized because there is no viable function for '<' comparison}} | ||
// both-note@#arr {{no viable 'operator==' for member 'arr'}} | ||
// both-note@#arr {{three-way comparison cannot be synthesized because there is no viable function for '==' comparison}} | ||
// both-note@#arr {{deleted comparison function for member 'arr'}} | ||
// both-note@#arr {{implied comparison for member 'arr' is ambiguous}} | ||
template<typename T> struct CmpArray { | ||
T arr[3]; // #arr | ||
std::strong_ordering operator<=>(const CmpArray&) const = default; // #cmparray both-note 5{{here}} | ||
}; | ||
void g() { | ||
use( | ||
CmpArray<A>() <=> CmpArray<A>(), | ||
CmpArray<B>() <=> CmpArray<B>(), | ||
CmpArray<C>() <=> CmpArray<C>(), // both-error {{deleted}} | ||
CmpArray<D1>() <=> CmpArray<D1>(), // both-error {{deleted}} | ||
CmpArray<D2>() <=> CmpArray<D2>(), // both-error {{deleted}} | ||
CmpArray<E>() <=> CmpArray<E>(), // both-error {{deleted}} | ||
CmpArray<F>() <=> CmpArray<F>(), // both-error {{deleted}} | ||
// FIXME: The following three errors are not very good. | ||
// both-error@#cmparray {{value of type 'void' is not contextually convertible to 'bool'}} | ||
CmpArray<G1>() <=> CmpArray<G1>(), // both-note-re {{in defaulted three-way comparison operator for '{{.*}}CmpArray<{{.*}}G1>' first required here}}j | ||
// both-error@#cmparray {{value of type 'void' is not contextually convertible to 'bool'}} | ||
CmpArray<G2>() <=> CmpArray<G2>(), // both-note-re {{in defaulted three-way comparison operator for '{{.*}}CmpArray<{{.*}}G2>' first required here}}j | ||
// both-error@#cmparray {{no matching conversion for static_cast from 'void' to 'std::strong_ordering'}} | ||
CmpArray<H>() <=> CmpArray<H>(), // both-note-re {{in defaulted three-way comparison operator for '{{.*}}CmpArray<{{.*}}H>' first required here}}j | ||
0 | ||
); | ||
} | ||
} | ||
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namespace Access { | ||
class A { | ||
std::strong_ordering operator<=>(const A &) const; // both-note {{here}} | ||
public: | ||
bool operator==(const A &) const; | ||
bool operator<(const A &) const; | ||
}; | ||
struct B { | ||
A a; // both-note {{would invoke a private 'operator<=>'}} | ||
friend std::strong_ordering operator<=>(const B &, const B &) = default; // both-warning {{deleted}} both-note{{replace 'default'}} | ||
}; | ||
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class C { | ||
std::strong_ordering operator<=>(const C &); // not viable (not const) | ||
bool operator==(const C &) const; // both-note {{here}} | ||
bool operator<(const C &) const; | ||
}; | ||
struct D { | ||
C c; // both-note {{would invoke a private 'operator=='}} | ||
friend std::strong_ordering operator<=>(const D &, const D &) = default; // both-warning {{deleted}} both-note{{replace 'default'}} | ||
}; | ||
} | ||
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namespace Synthesis { | ||
enum Result { False, True, Mu }; | ||
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constexpr bool toBool(Result R) { | ||
if (R == Mu) throw "should not ask this question"; | ||
return R == True; | ||
} | ||
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struct Val { | ||
Result equal, less; | ||
constexpr bool operator==(const Val&) const { return toBool(equal); } | ||
constexpr bool operator<(const Val&) const { return toBool(less); } | ||
}; | ||
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template<typename T> struct Cmp { | ||
Val val; | ||
friend T operator<=>(const Cmp&, const Cmp&) = default; // both-note {{deleted}} | ||
}; | ||
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template<typename T> constexpr auto cmp(Result equal, Result less = Mu, Result reverse_less = Mu) { | ||
return Cmp<T>{equal, less} <=> Cmp<T>{Mu, reverse_less}; | ||
} | ||
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static_assert(cmp<std::strong_ordering>(True) == 0); | ||
static_assert(cmp<std::strong_ordering>(False, True) < 0); | ||
static_assert(cmp<std::strong_ordering>(False, False) > 0); | ||
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static_assert(cmp<std::weak_ordering>(True) == 0); | ||
static_assert(cmp<std::weak_ordering>(False, True) < 0); | ||
static_assert(cmp<std::weak_ordering>(False, False) > 0); | ||
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static_assert(cmp<std::partial_ordering>(True) == 0); | ||
static_assert(cmp<std::partial_ordering>(False, True) < 0); | ||
static_assert(cmp<std::partial_ordering>(False, False, True) > 0); | ||
static_assert(!(cmp<std::partial_ordering>(False, False, False) > 0)); | ||
static_assert(!(cmp<std::partial_ordering>(False, False, False) == 0)); | ||
static_assert(!(cmp<std::partial_ordering>(False, False, False) < 0)); | ||
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// No synthesis is performed for a custom return type, even if it can be | ||
// converted from a standard ordering. | ||
struct custom_ordering { | ||
custom_ordering(std::strong_ordering o); | ||
}; | ||
void f(Cmp<custom_ordering> c) { | ||
c <=> c; // both-error {{deleted}} | ||
} | ||
} | ||
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namespace Preference { | ||
struct A { | ||
A(const A&) = delete; // both-note {{deleted}} | ||
// "usable" candidate that can't actually be called | ||
friend void operator<=>(A, A); // both-note {{passing}} | ||
// Callable candidates for synthesis not considered. | ||
friend bool operator==(A, A); | ||
friend bool operator<(A, A); | ||
}; | ||
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struct B { | ||
B(); | ||
A a; | ||
std::strong_ordering operator<=>(const B&) const = default; // both-error {{call to deleted constructor of 'A'}} | ||
}; | ||
bool x = B() < B(); // both-note {{in defaulted three-way comparison operator for 'B' first required here}} | ||
} |