mirror of
https://github.com/capstone-engine/llvm-capstone.git
synced 2024-11-27 15:41:46 +00:00
880fa7faa9
This reverts commit 491b2810fb.
This change broke valid code and generated incorrect diagnostics, see
https://reviews.llvm.org/D155064
1067 lines
36 KiB
C++
1067 lines
36 KiB
C++
// RUN: %clang_cc1 -std=c++20 -verify %s
|
|
|
|
namespace PR47043 {
|
|
template<typename T> concept True = true;
|
|
template<typename ...T> concept AllTrue1 = True<T>; // expected-error {{expression contains unexpanded parameter pack 'T'}}
|
|
template<typename ...T> concept AllTrue2 = (True<T> && ...);
|
|
template<typename ...T> concept AllTrue3 = (bool)(True<T> & ...);
|
|
static_assert(AllTrue2<int, float, char>);
|
|
static_assert(AllTrue3<int, float, char>);
|
|
}
|
|
|
|
namespace PR47025 {
|
|
template<typename ...T> concept AllAddable1 = requires(T ...t) { (void(t + 1), ...); };
|
|
template<typename ...T> concept AllAddable2 = (requires(T ...t) { (t + 1); } && ...); // expected-error {{requirement contains unexpanded parameter pack 't'}}
|
|
template<typename ...T> concept AllAddable3 = (requires(T t) { (t + 1); } && ...);
|
|
template<typename ...T> concept AllAddable4 = requires(T t) { (t + 1); }; // expected-error {{expression contains unexpanded parameter pack 'T'}}
|
|
template<typename ...T> concept AllAddable5 = requires(T t) { (void(t + 1), ...); }; // expected-error {{does not contain any unexpanded}}
|
|
template<typename ...T> concept AllAddable6 = (requires { (T() + 1); } && ...);
|
|
template<typename ...T> concept AllAddable7 = requires { (T() + 1); }; // expected-error {{expression contains unexpanded parameter pack 'T'}}
|
|
|
|
static_assert(AllAddable1<int, float>);
|
|
static_assert(AllAddable3<int, float>);
|
|
static_assert(AllAddable6<int, float>);
|
|
static_assert(!AllAddable1<int, void>);
|
|
static_assert(!AllAddable3<int, void>);
|
|
static_assert(!AllAddable6<int, void>);
|
|
}
|
|
|
|
namespace PR45699 {
|
|
template<class> concept C = true; // expected-note 2{{here}}
|
|
template<class ...Ts> void f1a() requires C<Ts>; // expected-error {{requires clause contains unexpanded parameter pack 'Ts'}}
|
|
template<class ...Ts> requires C<Ts> void f1b(); // expected-error {{requires clause contains unexpanded parameter pack 'Ts'}}
|
|
template<class ...Ts> void f2a() requires (C<Ts> && ...);
|
|
template<class ...Ts> requires (C<Ts> && ...) void f2b();
|
|
template<class ...Ts> void f3a() requires C<Ts...>; // expected-error {{pack expansion used as argument for non-pack parameter of concept}}
|
|
template<class ...Ts> requires C<Ts...> void f3b(); // expected-error {{pack expansion used as argument for non-pack parameter of concept}}
|
|
template<class ...Ts> void f4() {
|
|
([] () requires C<Ts> {} ()); // expected-error {{expression contains unexpanded parameter pack 'Ts'}}
|
|
([]<int = 0> requires C<Ts> () {} ()); // expected-error {{expression contains unexpanded parameter pack 'Ts'}}
|
|
}
|
|
template<class ...Ts> void f5() {
|
|
([] () requires C<Ts> {} (), ...);
|
|
([]<int = 0> requires C<Ts> () {} (), ...);
|
|
}
|
|
void g() {
|
|
f1a();
|
|
f1b(); // FIXME: Bad error recovery. expected-error {{undeclared identifier}}
|
|
f2a();
|
|
f2b();
|
|
f3a();
|
|
f3b(); // FIXME: Bad error recovery. expected-error {{undeclared identifier}}
|
|
f4();
|
|
f5();
|
|
}
|
|
}
|
|
|
|
namespace P0857R0 {
|
|
template <typename T> static constexpr bool V = true;
|
|
|
|
void f() {
|
|
auto x = []<bool B> requires B {}; // expected-note {{constraints not satisfied}} expected-note {{false}}
|
|
x.operator()<true>();
|
|
x.operator()<false>(); // expected-error {{no matching member function}}
|
|
|
|
auto y = []<typename T> requires V<T> () {};
|
|
y.operator()<int>(); // OK
|
|
}
|
|
|
|
template<typename T> concept C = true;
|
|
template<template<typename T> requires C<T> typename U> struct X {};
|
|
template<typename T> requires C<T> struct Y {};
|
|
X<Y> xy;
|
|
}
|
|
|
|
namespace PR50306 {
|
|
template<typename T> concept NotInt = sizeof(T) != sizeof(int); // expected-note {{because}}
|
|
template<typename T> void f() {
|
|
[](NotInt auto) {}(T()); // expected-error {{no matching function}} expected-note {{constraints not satisfied}} expected-note {{because}}
|
|
}
|
|
template void f<char>(); // OK
|
|
template void f<int>(); // expected-note {{in instantiation of}}
|
|
}
|
|
|
|
namespace PackInTypeConstraint {
|
|
template<typename T, typename U> concept C = sizeof(T) == sizeof(int); // expected-note 3{{}}
|
|
|
|
template<typename ...T, C<T> U> void h1(); // expected-error {{type constraint contains unexpanded parameter pack 'T'}}
|
|
template<typename ...T, C<T> ...U> void h2();
|
|
template<typename ...T> void h3(C<T> auto); // expected-error {{type constraint contains unexpanded parameter pack 'T'}}
|
|
template<typename ...T> void h4(C<T> auto...);
|
|
|
|
template<typename ...T> void f1() {
|
|
[]<C<T> U>(U u){}(T()); // expected-error {{unexpanded parameter pack 'T'}}
|
|
}
|
|
template<typename ...T> void f2() {
|
|
([]<C<T> U>(U u){}(T()), ...); // expected-error {{no match}} expected-note 2{{}}
|
|
}
|
|
template void f2<int, int, int>(); // OK
|
|
template void f2<int, char, double>(); // expected-note {{in instantiation of}}
|
|
void f3() {
|
|
([]<typename ...T, C<T> U>(U u){}(0), // expected-error {{type constraint contains unexpanded parameter pack 'T'}}
|
|
...); // expected-error {{does not contain any unexpanded}}
|
|
}
|
|
|
|
template<typename ...T> void g1() {
|
|
[](C<T> auto){}(T()); // expected-error {{expression contains unexpanded parameter pack 'T'}}
|
|
}
|
|
template<typename ...T> void g2() {
|
|
([](C<T> auto){}(T()), ...); // expected-error {{no matching function}} expected-note {{constraints not satisfied}} expected-note {{because}}
|
|
}
|
|
template void g2<int, int, int>(); // OK
|
|
template void g2<int, char, double>(); // expected-note {{in instantiation of}}
|
|
void g3() {
|
|
([]<typename ...T>(C<T> auto){}(1), // expected-error {{type constraint contains unexpanded parameter pack 'T'}}
|
|
...); // expected-error {{does not contain any unexpanded}}
|
|
}
|
|
|
|
template<typename ...T> void g4() {
|
|
[]() -> C<T> auto{ return T(); }(); // expected-error {{expression contains unexpanded parameter pack 'T'}}
|
|
}
|
|
template<typename ...T> void g5() {
|
|
([]() -> C<T> auto{ // expected-error-re {{deduced type {{.*}} does not satisfy}} expected-note {{while substituting into a lambda}}
|
|
return T();
|
|
}(), ...);
|
|
}
|
|
template void g5<int, int, int>(); // OK
|
|
template void g5<int, char, double>(); // expected-note {{in instantiation of}}
|
|
void g6() {
|
|
([]<typename ...T>() -> C<T> auto{ // expected-error {{declaration type contains unexpanded parameter pack 'T'}}
|
|
return T(); // expected-error {{expression contains unexpanded parameter pack 'T'}}
|
|
}(),
|
|
...); // expected-error {{does not contain any unexpanded}}
|
|
}
|
|
}
|
|
|
|
namespace BuiltinIsConstantEvaluated {
|
|
// Check that we do all satisfaction and diagnostic checks in a constant context.
|
|
template<typename T> concept C = __builtin_is_constant_evaluated(); // expected-warning {{always}}
|
|
static_assert(C<int>);
|
|
|
|
template<typename T> concept D = __builtin_is_constant_evaluated() == true; // expected-warning {{always}}
|
|
static_assert(D<int>);
|
|
|
|
template<typename T> concept E = __builtin_is_constant_evaluated() == true && // expected-warning {{always}}
|
|
false; // expected-note {{'false' evaluated to false}}
|
|
static_assert(E<int>); // expected-error {{failed}} expected-note {{because 'int' does not satisfy 'E'}}
|
|
|
|
template<typename T> concept F = __builtin_is_constant_evaluated() == false; // expected-warning {{always}}
|
|
// expected-note@-1 {{'__builtin_is_constant_evaluated() == false' (1 == 0)}}
|
|
static_assert(F<int>); // expected-error {{failed}} expected-note {{because 'int' does not satisfy 'F'}}
|
|
|
|
template<typename T> concept G = __builtin_is_constant_evaluated() && // expected-warning {{always}}
|
|
false; // expected-note {{'false' evaluated to false}}
|
|
static_assert(G<int>); // expected-error {{failed}} expected-note {{because 'int' does not satisfy 'G'}}
|
|
}
|
|
|
|
namespace NoConstantFolding {
|
|
// Ensure we use strict constant evaluation rules when checking satisfaction.
|
|
int n;
|
|
template <class T> concept C = &n + 3 - 3 == &n; // expected-error {{non-constant expression}} expected-note {{cannot refer to element 3 of non-array object}}
|
|
static_assert(C<void>); // expected-note {{while checking}}
|
|
}
|
|
|
|
namespace PR50337 {
|
|
template <typename T> concept foo = true;
|
|
template <typename T> concept foo2 = foo<T> && true;
|
|
void f(foo auto, auto);
|
|
void f(foo2 auto, auto);
|
|
void g() { f(1, 2); }
|
|
}
|
|
|
|
namespace PR50561 {
|
|
template<typename> concept C = false;
|
|
template<typename T, typename U> void f(T, U);
|
|
template<C T, typename U> void f(T, U) = delete;
|
|
void g() { f(0, 0); }
|
|
}
|
|
|
|
namespace PR49188 {
|
|
template<class T> concept C = false; // expected-note 7 {{because 'false' evaluated to false}}
|
|
|
|
C auto f1() { // expected-error {{deduced type 'void' does not satisfy 'C'}}
|
|
return void();
|
|
}
|
|
C auto f2() { // expected-error {{deduced type 'void' does not satisfy 'C'}}
|
|
return;
|
|
}
|
|
C auto f3() { // expected-error {{deduced type 'void' does not satisfy 'C'}}
|
|
}
|
|
C decltype(auto) f4() { // expected-error {{deduced type 'void' does not satisfy 'C'}}
|
|
return void();
|
|
}
|
|
C decltype(auto) f5() { // expected-error {{deduced type 'void' does not satisfy 'C'}}
|
|
return;
|
|
}
|
|
C decltype(auto) f6() { // expected-error {{deduced type 'void' does not satisfy 'C'}}
|
|
}
|
|
C auto& f7() { // expected-error {{deduced type 'void' does not satisfy 'C'}}
|
|
return void();
|
|
}
|
|
C auto& f8() {
|
|
return; // expected-error {{cannot deduce return type 'C auto &' from omitted return expression}}
|
|
}
|
|
C auto& f9() { // expected-error {{cannot deduce return type 'C auto &' for function with no return statements}}
|
|
}
|
|
}
|
|
namespace PR53911 {
|
|
template<class T> concept C = false; // expected-note 3 {{because 'false' evaluated to false}}
|
|
|
|
C auto *f1() { // expected-error {{deduced type 'void' does not satisfy 'C'}}
|
|
return (void*)nullptr;
|
|
}
|
|
C auto *f2() { // expected-error {{deduced type 'int' does not satisfy 'C'}}
|
|
return (int*)nullptr;
|
|
}
|
|
C auto *****f3() { // expected-error {{deduced type 'int' does not satisfy 'C'}}
|
|
return (int*****)nullptr;
|
|
}
|
|
}
|
|
|
|
namespace PR54379 {
|
|
template <int N>
|
|
struct A {
|
|
static void f() requires (N == 0) { return; } // expected-note {{candidate template ignored: constraints not satisfied}} expected-note {{evaluated to false}}
|
|
static void f() requires (N == 1) { return; } // expected-note {{candidate template ignored: constraints not satisfied}} expected-note {{evaluated to false}}
|
|
};
|
|
void (*f1)() = A<2>::f; // expected-error {{address of overloaded function 'f' does not match required type}}
|
|
|
|
struct B {
|
|
template <int N2 = 1> static void f() requires (N2 == 0) { return; } // expected-note {{candidate template ignored: constraints not satisfied [with N2 = 1]}} expected-note {{evaluated to false}}
|
|
};
|
|
void (*f2)() = B::f; // expected-error {{address of overloaded function 'f' does not match required type}}
|
|
}
|
|
|
|
namespace PR54443 {
|
|
|
|
template <class T, class U>
|
|
struct is_same { static constexpr bool value = false; };
|
|
|
|
template <class T>
|
|
struct is_same<T, T> { static constexpr bool value = true; };
|
|
|
|
template <class T, class U>
|
|
concept same_as = is_same<T, U>::value; // expected-note-re 4 {{because {{.*}} evaluated to false}}
|
|
|
|
int const &f();
|
|
|
|
same_as<int const> auto i1 = f(); // expected-error {{deduced type 'int' does not satisfy 'same_as<const int>'}}
|
|
same_as<int const> auto &i2 = f();
|
|
same_as<int const> auto &&i3 = f(); // expected-error {{deduced type 'const int &' does not satisfy 'same_as<const int>'}}
|
|
|
|
same_as<int const &> auto i4 = f(); // expected-error {{deduced type 'int' does not satisfy 'same_as<const int &>'}}
|
|
same_as<int const &> auto &i5 = f(); // expected-error {{deduced type 'const int' does not satisfy 'same_as<const int &>'}}
|
|
same_as<int const &> auto &&i6 = f();
|
|
|
|
template <class T>
|
|
concept C = false; // expected-note 3 {{because 'false' evaluated to false}}
|
|
|
|
int **const &g();
|
|
|
|
C auto **j1 = g(); // expected-error {{deduced type 'int' does not satisfy 'C'}}
|
|
C auto **&j2 = g(); // expected-error {{deduced type 'int' does not satisfy 'C'}}
|
|
C auto **&&j3 = g(); // expected-error {{deduced type 'int' does not satisfy 'C'}}
|
|
}
|
|
|
|
namespace GH55567 {
|
|
template<class, template <class> class> concept C = true;
|
|
template <class> struct S {};
|
|
void f(C<GH55567::S> auto);
|
|
} // namespace GH55567
|
|
|
|
namespace SubConstraintChecks {
|
|
template <typename T>
|
|
concept TrueConstraint = true;
|
|
template <typename T>
|
|
concept FalseConstraint = false;
|
|
|
|
template <typename T, typename... Us>
|
|
class ContainsConstrainedFuncTrue {
|
|
public:
|
|
template <typename V, TrueConstraint Constrained>
|
|
static void func(V &&, Constrained &&C);
|
|
};
|
|
template <typename T, typename... Us>
|
|
class ContainsConstrainedFuncFalse {
|
|
public:
|
|
template <typename V, FalseConstraint Constrained>
|
|
static void func(V &&, Constrained &&C);
|
|
};
|
|
|
|
template <typename... Us>
|
|
concept TrueConstraint2 =
|
|
requires(float &&t) {
|
|
ContainsConstrainedFuncTrue<float, Us...>::func(5, 0.0);
|
|
};
|
|
template <typename... Us>
|
|
concept FalseConstraint2 =
|
|
requires(float &&t) {
|
|
ContainsConstrainedFuncFalse<float, Us...>::func(5, 0.0); // #FC2_CONSTR
|
|
};
|
|
|
|
template <typename T>
|
|
void useTrue(int F)
|
|
requires TrueConstraint2<int>
|
|
{}
|
|
|
|
template <typename T>
|
|
void useFalse(int F) // #USE_FALSE
|
|
requires FalseConstraint2<int> // #USE_FALSE_CONSTR
|
|
{}
|
|
|
|
// Should only diagnose 'false' once instantiated.
|
|
void UseUse() {
|
|
useTrue<int>(5);
|
|
useFalse<int>(5);
|
|
// expected-error@-1{{no matching function for call to 'useFalse'}}
|
|
// expected-note@#USE_FALSE{{constraints not satisfied}}
|
|
// expected-note@#USE_FALSE_CONSTR{{because 'int' does not satisfy 'FalseConstraint2'}}
|
|
// expected-note@#FC2_CONSTR {{would be invalid: no matching function for call to 'func'}}
|
|
}
|
|
} // namespace SubConstraintChecks
|
|
|
|
namespace DeducedTemplateArgs {
|
|
template <typename Itr> struct ItrTraits {
|
|
template <typename PtrItr> struct Ptr {
|
|
};
|
|
template <typename PtrItr>
|
|
requires requires { typename PtrItr::pointer; }
|
|
struct Ptr<PtrItr> {
|
|
using type = typename Itr::pointer;
|
|
};
|
|
using pointer = typename Ptr<Itr>::type; // #TRAITS_PTR
|
|
};
|
|
|
|
struct complete_itr {
|
|
using pointer = int;
|
|
};
|
|
|
|
template <typename T> class Complete {
|
|
using ItrType = ItrTraits<complete_itr>;
|
|
ItrType begin() noexcept { return ItrType(); }
|
|
};
|
|
|
|
// This version doesn't have 'pointer', so error confirms we are in the first
|
|
// verison of 'Ptr'.
|
|
struct not_complete_itr {
|
|
};
|
|
|
|
template <typename T> class NotComplete {
|
|
using ItrType = ItrTraits<not_complete_itr>;
|
|
ItrType begin() noexcept { return ItrType(); }
|
|
// expected-error@#TRAITS_PTR{{no type named 'type' in }}
|
|
// expected-note@-2{{in instantiation of template class }}
|
|
};
|
|
} // namespace DeducedTemplateArgs
|
|
|
|
namespace DeferredInstantiationInstScope {
|
|
template <typename T>
|
|
struct remove_ref {
|
|
using type = T;
|
|
};
|
|
template <typename T>
|
|
struct remove_ref<T &> {
|
|
using type = T;
|
|
};
|
|
template <typename T>
|
|
struct remove_ref<T &&> {
|
|
using type = T;
|
|
};
|
|
|
|
template <typename T>
|
|
constexpr bool IsInt = PR54443::is_same<typename remove_ref<T>::type,
|
|
int>::value;
|
|
|
|
template <typename U>
|
|
void SingleDepthReferencesTop(U &&u) {
|
|
struct lc {
|
|
void operator()() // #SDRT_OP
|
|
requires IsInt<decltype(u)> // #SDRT_REQ
|
|
{}
|
|
};
|
|
lc lv;
|
|
lv(); // #SDRT_CALL
|
|
}
|
|
|
|
template <typename U>
|
|
void SingleDepthReferencesTopNotCalled(U &&u) {
|
|
struct lc {
|
|
void operator()()
|
|
requires IsInt<typename decltype(u)::FOO>
|
|
{}
|
|
};
|
|
lc lv;
|
|
}
|
|
|
|
template <typename U>
|
|
void SingleDepthReferencesTopCalled(U &&u) {
|
|
struct lc {
|
|
void operator()() // #CALLOP
|
|
requires IsInt<typename decltype(u)::FOO> // #CONSTR
|
|
{}
|
|
};
|
|
lc lv;
|
|
lv();
|
|
// expected-error@-1{{no matching function for call to object of type 'lc'}}
|
|
// expected-note@#SDRTC{{in instantiation of function template}}
|
|
// expected-note@#CALLOP{{constraints not satisfied}}
|
|
// expected-note@#CONSTR{{substituted constraint expression is ill-formed}}
|
|
}
|
|
|
|
template <typename U>
|
|
void SingleDepthReferencesTopLambda(U &&u) {
|
|
[]() // #SDRTL_OP
|
|
requires IsInt<decltype(u)> // #SDRTL_REQ
|
|
{}();
|
|
}
|
|
|
|
template <typename U>
|
|
void DoubleDepthReferencesTop(U &&u) {
|
|
struct lc { // #DDRT_STRCT
|
|
void operator()() {
|
|
struct lc2 {
|
|
void operator()() // #DDRT_OP
|
|
requires IsInt<decltype(u)> // #DDRT_REQ
|
|
{}
|
|
};
|
|
lc2 lv2;
|
|
lv2(); // #DDRT_CALL
|
|
}
|
|
};
|
|
lc lv;
|
|
lv();
|
|
}
|
|
|
|
template <typename U>
|
|
void DoubleDepthReferencesTopLambda(U &&u) {
|
|
[]() { []() // #DDRTL_OP
|
|
requires IsInt<decltype(u)> // #DDRTL_REQ
|
|
{}(); }();
|
|
}
|
|
|
|
template <typename U>
|
|
void DoubleDepthReferencesAll(U &&u) {
|
|
struct lc { // #DDRA_STRCT
|
|
void operator()(U &&u2) {
|
|
struct lc2 {
|
|
void operator()(U &&u3) // #DDRA_OP
|
|
requires IsInt<decltype(u)> && // #DDRA_REQ
|
|
IsInt<decltype(u2)> && IsInt<decltype(u3)>
|
|
{}
|
|
};
|
|
lc2 lv2;
|
|
lv2(u2); // #DDRA_CALL
|
|
}
|
|
};
|
|
lc lv;
|
|
lv(u);
|
|
}
|
|
|
|
template <typename U>
|
|
void DoubleDepthReferencesAllLambda(U &&u) {
|
|
[](U &&u2) { // #DDRAL_OP1
|
|
[](U && u3) // #DDRAL_OP2
|
|
requires IsInt<decltype(u)> // #DDRAL_REQ
|
|
&& IsInt<decltype(u2)>
|
|
&& IsInt<decltype(u3)>
|
|
{}(u2);
|
|
}(u);
|
|
}
|
|
|
|
template <typename U>
|
|
struct CausesFriendConstraint {
|
|
template <typename V>
|
|
friend void FriendFunc(CausesFriendConstraint, V) // #FF_DECL
|
|
requires IsInt<U> &&
|
|
IsInt<V> // #FF_REQ
|
|
{}
|
|
};
|
|
// FIXME: Re-enable this test when constraints are allowed to refer to captures.
|
|
// template<typename T>
|
|
// void ChecksCapture(T x) {
|
|
// [y = x]() requires(IsInt<decltype(y)>){}();
|
|
// }
|
|
|
|
template <typename T>
|
|
void ChecksLocalVar(T x) {
|
|
T Local;
|
|
[]() // #CLV_OP
|
|
requires(IsInt<decltype(Local)>) // #CLV_REQ
|
|
{}();
|
|
}
|
|
|
|
template <typename T>
|
|
void LocalStructMemberVar(T x) {
|
|
struct S {
|
|
T local;
|
|
void foo()
|
|
requires(IsInt<decltype(local)>) // #LSMV_REQ
|
|
{}
|
|
} s;
|
|
s.foo(); // #LSMV_CALL
|
|
};
|
|
|
|
template <typename T>
|
|
struct ChecksMemberVar {
|
|
T t;
|
|
void foo()
|
|
requires(IsInt<decltype(t)>) // #CMV_FOO
|
|
{}
|
|
template <typename U>
|
|
void foo2() // #CMV_FOO2
|
|
requires(IsInt<decltype(t)>) // #CMV_FOO2_REQ
|
|
{}
|
|
};
|
|
|
|
void test_dependent() {
|
|
int v = 0;
|
|
float will_fail;
|
|
SingleDepthReferencesTop(v);
|
|
SingleDepthReferencesTop(will_fail);
|
|
// expected-error@#SDRT_CALL{{no matching function for call to object of type 'lc'}}
|
|
// expected-note@-2{{in instantiation of function template specialization}}
|
|
// expected-note@#SDRT_OP{{candidate function not viable}}
|
|
// expected-note@#SDRT_REQ{{'IsInt<decltype(u)>' evaluated to false}}
|
|
|
|
SingleDepthReferencesTopNotCalled(v);
|
|
// Won't error unless we try to call it.
|
|
SingleDepthReferencesTopNotCalled(will_fail);
|
|
SingleDepthReferencesTopCalled(v); // #SDRTC
|
|
SingleDepthReferencesTopLambda(v);
|
|
SingleDepthReferencesTopLambda(will_fail);
|
|
// expected-note@-1{{in instantiation of function template specialization}}
|
|
// expected-error@#SDRTL_OP{{no matching function for call to object of type}}
|
|
// expected-note@#SDRTL_OP{{candidate function not viable: constraints not satisfied}}
|
|
// expected-note@#SDRTL_REQ{{because 'IsInt<decltype(u)>' evaluated to false}}
|
|
|
|
DoubleDepthReferencesTop(v);
|
|
DoubleDepthReferencesTop(will_fail);
|
|
// expected-error@#DDRT_CALL{{no matching function for call to object of type 'lc2'}}
|
|
// expected-note@-2{{in instantiation of function template specialization}}
|
|
// expected-note@#DDRT_STRCT{{in instantiation of member function}}
|
|
// expected-note@#DDRT_OP{{candidate function not viable}}
|
|
// expected-note@#DDRT_REQ{{'IsInt<decltype(u)>' evaluated to false}}
|
|
|
|
DoubleDepthReferencesTopLambda(v);
|
|
DoubleDepthReferencesTopLambda(will_fail);
|
|
// expected-note@-1{{in instantiation of function template specialization}}
|
|
// expected-error@#DDRTL_OP{{no matching function for call to object of type}}
|
|
// expected-note@#DDRTL_OP{{candidate function not viable: constraints not satisfied}}
|
|
// expected-note@#DDRTL_OP{{while substituting into a lambda expression here}}
|
|
// expected-note@#DDRTL_REQ{{because 'IsInt<decltype(u)>' evaluated to false}}
|
|
DoubleDepthReferencesAll(v);
|
|
DoubleDepthReferencesAll(will_fail);
|
|
// expected-error@#DDRA_CALL{{no matching function for call to object of type 'lc2'}}
|
|
// expected-note@-2{{in instantiation of function template specialization}}
|
|
// expected-note@#DDRA_STRCT{{in instantiation of member function}}
|
|
// expected-note@#DDRA_OP{{candidate function not viable}}
|
|
// expected-note@#DDRA_REQ{{'IsInt<decltype(u)>' evaluated to false}}
|
|
|
|
DoubleDepthReferencesAllLambda(v);
|
|
DoubleDepthReferencesAllLambda(will_fail);
|
|
// expected-note@-1{{in instantiation of function template specialization}}
|
|
// expected-note@#DDRAL_OP1{{while substituting into a lambda expression here}}
|
|
// expected-error@#DDRAL_OP2{{no matching function for call to object of type}}
|
|
// expected-note@#DDRAL_OP2{{candidate function not viable: constraints not satisfied}}
|
|
// expected-note@#DDRAL_REQ{{because 'IsInt<decltype(u)>' evaluated to false}}
|
|
|
|
CausesFriendConstraint<int> CFC;
|
|
FriendFunc(CFC, 1);
|
|
FriendFunc(CFC, 1.0);
|
|
// expected-error@-1{{no matching function for call to 'FriendFunc'}}
|
|
// expected-note@#FF_DECL{{constraints not satisfied}}
|
|
// expected-note@#FF_REQ{{because 'IsInt<double>' evaluated to false}}
|
|
|
|
// FIXME: Re-enable this test when constraints are allowed to refer to captures.
|
|
// ChecksCapture(v);
|
|
|
|
ChecksLocalVar(v);
|
|
ChecksLocalVar(will_fail);
|
|
// expected-note@-1{{in instantiation of function template specialization}}
|
|
// expected-error@#CLV_OP{{no matching function for call to object of type}}
|
|
// expected-note@#CLV_OP{{candidate function not viable: constraints not satisfied}}
|
|
// expected-note@#CLV_REQ{{because 'IsInt<decltype(Local)>' evaluated to false}}
|
|
|
|
|
|
|
|
LocalStructMemberVar(v);
|
|
LocalStructMemberVar(will_fail);
|
|
// expected-error@#LSMV_CALL{{invalid reference to function 'foo'}}
|
|
// expected-note@-2{{in instantiation of function template specialization}}
|
|
// expected-note@#LSMV_REQ{{because 'IsInt<decltype(this->local)>' evaluated to false}}
|
|
|
|
ChecksMemberVar<int> CMV;
|
|
CMV.foo();
|
|
CMV.foo2<int>();
|
|
|
|
ChecksMemberVar<float> CMV2;
|
|
CMV2.foo();
|
|
// expected-error@-1{{invalid reference to function 'foo'}}
|
|
// expected-note@#CMV_FOO{{because 'IsInt<decltype(this->t)>' evaluated to false}}
|
|
CMV2.foo2<float>();
|
|
// expected-error@-1{{no matching member function for call to 'foo2'}}
|
|
// expected-note@#CMV_FOO2{{constraints not satisfied}}
|
|
// expected-note@#CMV_FOO2_REQ{{because 'IsInt<decltype(this->t)>' evaluated to false}}
|
|
}
|
|
} // namespace DeferredInstantiationInstScope
|
|
|
|
// Ane example of evaluating a concept at two different depths in the same
|
|
// evaluation. No diagnostic is expected.
|
|
namespace SameConceptDifferentDepth {
|
|
template <class _Ip>
|
|
concept sentinel_for =
|
|
requires(_Ip __i) {
|
|
__i++;
|
|
};
|
|
|
|
template <class _Ip>
|
|
concept bidirectional_iterator =
|
|
sentinel_for<_Ip>;
|
|
|
|
template <class _Iter>
|
|
class move_iterator {
|
|
public:
|
|
auto operator++(int)
|
|
requires sentinel_for<_Iter>{}
|
|
};
|
|
|
|
static_assert(bidirectional_iterator<move_iterator<int>>);
|
|
} // namespace SameConceptDifferentDepth
|
|
|
|
namespace VarInit {
|
|
template <class _Tp>
|
|
concept __can_reference = true;
|
|
|
|
template <class _Iter>
|
|
class common_iterator {
|
|
public:
|
|
common_iterator() {
|
|
constexpr auto x = requires(_Iter & __i) { { __i } -> __can_reference; };
|
|
}
|
|
};
|
|
|
|
void test() {
|
|
auto commonIter1 = common_iterator<int>();
|
|
}
|
|
} // namespace VarInit
|
|
|
|
|
|
namespace InlineFriendOperator {
|
|
template <typename T>
|
|
concept C = true;
|
|
template <class _Iter>
|
|
class counted_iterator {
|
|
_Iter I;
|
|
public:
|
|
constexpr counted_iterator() = default;
|
|
friend constexpr auto operator+( // expected-note {{candidate function not viable}}
|
|
int __n, const counted_iterator &__x)
|
|
requires C<decltype(I)>
|
|
{
|
|
return __x + __n; // expected-error{{invalid operands to binary expression}}
|
|
}
|
|
};
|
|
|
|
constexpr bool test() {
|
|
counted_iterator<int> iter;
|
|
auto x = 2 + iter; // expected-note{{in instantiation of member function 'InlineFriendOperator::operator+'}}
|
|
|
|
return true;
|
|
}
|
|
} // namespace InlineFriendOperator
|
|
|
|
namespace ClassTemplateInstantiation {
|
|
struct Type;
|
|
template < typename A, typename B, typename C>
|
|
concept ConstraintF = false; // #ConstraintF
|
|
template < typename A, typename B, typename C>
|
|
concept ConstraintT = true;
|
|
|
|
template < typename T > struct Parent {
|
|
template < typename U, ConstraintT<T, U> > struct ChildT{};
|
|
ChildT<Type, Type> CauseInstT;
|
|
template < typename U, ConstraintF<T, U> > struct ChildF{};// #ChildF
|
|
ChildF<Type, Type> CauseInstF; //#CauseInstF
|
|
};
|
|
|
|
// expected-error@#CauseInstF{{constraints not satisfied for class template}}
|
|
// expected-note@+3{{in instantiation of template class}}
|
|
// expected-note@#ChildF{{evaluated to false}}
|
|
// expected-note@#ConstraintF{{because 'false' evaluated to false}}
|
|
Parent<int> Inst;
|
|
} // namespace ClassTemplateInstantiation
|
|
|
|
namespace SelfFriend {
|
|
template<class T>
|
|
concept Constraint = requires (T i) { (*i); };
|
|
template<class T>
|
|
concept Constraint2 = requires (T i) { (*i); };
|
|
|
|
template<Constraint T>
|
|
struct Iterator {
|
|
template <Constraint>
|
|
friend class Iterator;
|
|
void operator*();
|
|
};
|
|
|
|
template<Constraint T> // #ITER_BAD
|
|
struct IteratorBad {
|
|
template <Constraint2>//#ITER_BAD_FRIEND
|
|
friend class IteratorBad;
|
|
void operator*();
|
|
};
|
|
|
|
Iterator<int*> I;
|
|
Iterator<char*> I2;
|
|
IteratorBad<int*> I3; // expected-error@#ITER_BAD_FRIEND{{constraint differs}}
|
|
// expected-note@-1{{in instantiation of template class}}
|
|
// expected-note@#ITER_BAD{{previous template declaration}}
|
|
} // namespace SelfFriend
|
|
|
|
|
|
namespace Surrogates {
|
|
int f1(int);
|
|
template <auto N>
|
|
struct A {
|
|
using F = int(int);
|
|
operator F*() requires N { return f1; } // expected-note{{conversion candidate 'operator int (*)(int)' not viable: constraints not satisfied}}
|
|
};
|
|
int i = A<true>{}(0);
|
|
int j = A<false>{}(0); // expected-error{{no matching function for call to object of type 'A<false>'}}
|
|
}
|
|
|
|
|
|
namespace ConstrainedMemberVarTemplate {
|
|
template <long Size> struct Container {
|
|
static constexpr long arity = Size;
|
|
template <typename U>
|
|
requires(sizeof(U) == arity) // #CMVT_REQ
|
|
using var_templ = int;
|
|
};
|
|
Container<4>::var_templ<int> inst;
|
|
Container<5>::var_templ<int> inst_fail;
|
|
// expected-error@-1{{constraints not satisfied for alias template 'var_templ'}}
|
|
// expected-note@#CMVT_REQ{{because 'sizeof(int) == arity' (4 == 5) evaluated to false}}
|
|
} // namespace ConstrainedMemberVarTemplate
|
|
|
|
// These should not diagnose, where we were unintentionally doing so before by
|
|
// checking trailing requires clause twice, yet not having the ability to the
|
|
// 2nd time, since it was no longer a dependent variant.
|
|
namespace InheritedFromPartialSpec {
|
|
template<class C>
|
|
constexpr bool Check = true;
|
|
|
|
template<typename T>
|
|
struct Foo {
|
|
template<typename U>
|
|
Foo(U&&) requires (Check<U>){}
|
|
template<typename U>
|
|
void MemFunc(U&&) requires (Check<U>){}
|
|
template<typename U>
|
|
static void StaticMemFunc(U&&) requires (Check<U>){}
|
|
~Foo() requires (Check<T>){}
|
|
};
|
|
|
|
template<>
|
|
struct Foo<void> : Foo<int> {
|
|
using Foo<int>::Foo;
|
|
using Foo<int>::MemFunc;
|
|
using Foo<int>::StaticMemFunc;
|
|
};
|
|
|
|
void use() {
|
|
Foo<void> F {1.1};
|
|
F.MemFunc(1.1);
|
|
Foo<void>::StaticMemFunc(1.1);
|
|
}
|
|
|
|
template<typename T>
|
|
struct counted_iterator {
|
|
constexpr auto operator->() const noexcept requires false {
|
|
return T::Invalid;
|
|
};
|
|
};
|
|
|
|
template<class _Ip>
|
|
concept __has_member_pointer = requires { typename _Ip::pointer; };
|
|
|
|
template<class>
|
|
struct __iterator_traits_member_pointer_or_arrow_or_void { using type = void; };
|
|
template<__has_member_pointer _Ip>
|
|
struct __iterator_traits_member_pointer_or_arrow_or_void<_Ip> { using type = typename _Ip::pointer; };
|
|
|
|
template<class _Ip>
|
|
requires requires(_Ip& __i) { __i.operator->(); } && (!__has_member_pointer<_Ip>)
|
|
struct __iterator_traits_member_pointer_or_arrow_or_void<_Ip> {
|
|
using type = decltype(declval<_Ip&>().operator->());
|
|
};
|
|
|
|
|
|
void use2() {
|
|
__iterator_traits_member_pointer_or_arrow_or_void<counted_iterator<int>> f;
|
|
}
|
|
}// namespace InheritedFromPartialSpec
|
|
|
|
namespace GH48182 {
|
|
template<typename, typename..., typename = int> // expected-error{{template parameter pack must be the last template parameter}}
|
|
concept invalid = true;
|
|
|
|
template<typename> requires invalid<int> // expected-error{{use of undeclared identifier 'invalid'}}
|
|
no errors are printed
|
|
;
|
|
|
|
static_assert(invalid<int> also here ; // expected-error{{use of undeclared identifier 'invalid'}}
|
|
|
|
int foo() {
|
|
bool b;
|
|
b = invalid<int> not just in declarations; // expected-error{{expected ';' after expression}}
|
|
// expected-error@-1{{use of undeclared identifier 'invalid'}}
|
|
// expected-error@-2{{expected ';' after expression}}
|
|
// expected-error@-3{{use of undeclared identifier 'just'}}
|
|
// expected-error@-4{{unknown type name 'in'}}
|
|
return b;
|
|
}
|
|
} // namespace GH48182
|
|
|
|
namespace GH61777 {
|
|
template<class T> concept C = sizeof(T) == 4; // #61777_C
|
|
template<class T, class U> concept C2 = sizeof(T) == sizeof(U); //#61777_C2
|
|
|
|
template<class T>
|
|
struct Parent {
|
|
template<class, C auto> struct TakesUnary { static const int i = 0 ; }; // #UNARY
|
|
template<class, C2<T> auto> struct TakesBinary { static const int i = 0 ; }; //#BINARY
|
|
};
|
|
|
|
static_assert(Parent<void>::TakesUnary<int, 0>::i == 0);
|
|
// expected-error@+3{{constraints not satisfied for class template 'TakesUnary'}}
|
|
// expected-note@#UNARY{{because 'decltype(0ULL)' (aka 'unsigned long long') does not satisfy 'C'}}
|
|
// expected-note@#61777_C{{because 'sizeof(unsigned long long) == 4' (8 == 4) evaluated to false}}
|
|
static_assert(Parent<void>::TakesUnary<int, 0uLL>::i == 0);
|
|
|
|
static_assert(Parent<int>::TakesBinary<int, 0>::i == 0);
|
|
// expected-error@+3{{constraints not satisfied for class template 'TakesBinary'}}
|
|
// expected-note@#BINARY{{because 'C2<decltype(0ULL), int>' evaluated to false}}
|
|
// expected-note@#61777_C2{{because 'sizeof(unsigned long long) == sizeof(int)' (8 == 4) evaluated to false}}
|
|
static_assert(Parent<int>::TakesBinary<int, 0ULL>::i == 0);
|
|
}
|
|
|
|
namespace TemplateInsideNonTemplateClass {
|
|
template<typename T, typename U> concept C = true;
|
|
|
|
template<typename T> auto L = []<C<T> U>() {};
|
|
|
|
struct Q {
|
|
template<C<int> U> friend constexpr auto decltype(L<int>)::operator()() const;
|
|
};
|
|
|
|
template <class T>
|
|
concept C1 = false;
|
|
|
|
struct Foo {
|
|
template <typename>
|
|
struct Bar {};
|
|
|
|
template <typename T>
|
|
requires(C1<T>)
|
|
struct Bar<T>;
|
|
};
|
|
|
|
Foo::Bar<int> BarInstance;
|
|
} // namespace TemplateInsideNonTemplateClass
|
|
|
|
namespace GH61959 {
|
|
template <typename T0>
|
|
concept C = (sizeof(T0) >= 4);
|
|
|
|
template<typename...>
|
|
struct Orig { };
|
|
|
|
template<typename T>
|
|
struct Orig<T> {
|
|
template<typename> requires C<T>
|
|
void f() { }
|
|
|
|
template<typename> requires true
|
|
void f() { }
|
|
};
|
|
|
|
template <typename...> struct Mod {};
|
|
|
|
template <typename T1, typename T2>
|
|
struct Mod<T1, T2> {
|
|
template <typename> requires C<T1>
|
|
constexpr static int f() { return 1; }
|
|
|
|
template <typename> requires C<T2>
|
|
constexpr static int f() { return 2; }
|
|
};
|
|
|
|
static_assert(Mod<int, char>::f<double>() == 1);
|
|
static_assert(Mod<char, int>::f<double>() == 2);
|
|
|
|
template<typename T>
|
|
struct Outer {
|
|
template<typename ...>
|
|
struct Inner {};
|
|
|
|
template<typename U>
|
|
struct Inner<U> {
|
|
template<typename V>
|
|
void foo() requires C<U> && C<T> && C<V>{}
|
|
template<typename V>
|
|
void foo() requires true{}
|
|
};
|
|
};
|
|
|
|
void bar() {
|
|
Outer<int>::Inner<float> I;
|
|
I.foo<char>();
|
|
}
|
|
} // namespace GH61959
|
|
|
|
|
|
namespace TemplateInsideTemplateInsideTemplate {
|
|
template<typename T>
|
|
concept C1 = false;
|
|
|
|
template <unsigned I0>
|
|
struct W0 {
|
|
template <unsigned I1>
|
|
struct W1 {
|
|
template <typename T>
|
|
struct F {
|
|
enum { value = 1 };
|
|
};
|
|
|
|
template <typename T>
|
|
requires C1<T>
|
|
struct F<T> {
|
|
enum { value = 2 };
|
|
};
|
|
};
|
|
};
|
|
|
|
static_assert(W0<0>::W1<1>::F<int>::value == 1);
|
|
} // TemplateInsideTemplateInsideTemplate
|
|
|
|
|
|
namespace GH63181 {
|
|
|
|
template<auto N, class T> void f() {
|
|
auto l = []() requires N { }; // expected-note 2{{candidate function not viable: constraints not satisfied}} \
|
|
// expected-note 2{{because 'false' evaluated to false}}
|
|
|
|
l();
|
|
// expected-error@-1 {{no matching function for call to object of type}}
|
|
void(*ptr)() = l;
|
|
// expected-error-re@-1 {{no viable conversion from '(lambda {{.*}})' to 'void (*)()'}}
|
|
}
|
|
|
|
template void f<false, int>(); // expected-note {{in instantiation of function template specialization 'GH63181::f<false, int>' requested here}}
|
|
template void f<true, int>();
|
|
|
|
template<class T> concept C = __is_same(T, int); // expected-note{{because '__is_same(char, int)' evaluated to false}}
|
|
|
|
template<class... Ts> void f() {
|
|
([]() requires C<Ts> { return Ts(); }(), ...);
|
|
// expected-error@-1 {{no matching function for call to object of type}} \
|
|
// expected-note@-1 {{candidate function not viable: constraints not satisfied}} \
|
|
// expected-note@-1 {{because 'char' does not satisfy 'C'}}
|
|
}
|
|
|
|
template void f<int, int, int>();
|
|
template void f<int, int, char>();
|
|
//expected-note@-1{{in instantiation of function template specialization 'GH63181::f<int, int, char>' requested here}}
|
|
|
|
|
|
template <typename T, bool IsTrue>
|
|
concept Test = IsTrue; // expected-note 2{{because 'false' evaluated to false}}
|
|
|
|
template <typename T, bool IsTrue>
|
|
void params() {
|
|
auto l = [](T t) // expected-note 2{{candidate function not viable: constraints not satisfied}}
|
|
requires Test<decltype(t), IsTrue> // expected-note 2{{because 'Test<decltype(t), false>' evaluated to false}}
|
|
{};
|
|
using F = void(T);
|
|
F* f = l; // expected-error {{no viable conversion from}}
|
|
l(0); // expected-error {{no matching function for call to object}}
|
|
}
|
|
|
|
void test_params() {
|
|
params<int, true>();
|
|
params<int, false>(); // expected-note {{in instantiation of function template specialization 'GH63181::params<int, false>' requested here}}
|
|
}
|
|
|
|
}
|
|
|
|
namespace GH54678 {
|
|
template<class>
|
|
concept True = true;
|
|
|
|
template<class>
|
|
concept False = false; // expected-note 9 {{'false' evaluated to false}}
|
|
|
|
template<class>
|
|
concept Irrelevant = false;
|
|
|
|
template <typename T>
|
|
concept ErrorRequires = requires(ErrorRequires auto x) { x; }; // expected-error {{unknown type name 'ErrorRequires'}}
|
|
|
|
template<class T> void aaa(T t) // expected-note {{candidate template ignored: constraints not satisfied}}
|
|
requires (False<T> || False<T>) || False<T> {} // expected-note 3 {{'int' does not satisfy 'False'}}
|
|
template<class T> void bbb(T t) // expected-note {{candidate template ignored: constraints not satisfied}}
|
|
requires (False<T> || False<T>) && True<T> {} // expected-note 2 {{'long' does not satisfy 'False'}}
|
|
template<class T> void ccc(T t) // expected-note {{candidate template ignored: constraints not satisfied}}
|
|
requires (True<T> || Irrelevant<T>) && False<T> {} // expected-note {{'unsigned long' does not satisfy 'False'}}
|
|
template<class T> void ddd(T t) // expected-note {{candidate template ignored: constraints not satisfied}}
|
|
requires (Irrelevant<T> || True<T>) && False<T> {} // expected-note {{'int' does not satisfy 'False'}}
|
|
template<class T> void eee(T t) // expected-note {{candidate template ignored: constraints not satisfied}}
|
|
requires (Irrelevant<T> || Irrelevant<T> || True<T>) && False<T> {} // expected-note {{'long' does not satisfy 'False'}}
|
|
|
|
template<class T> void fff(T t) // expected-note {{candidate template ignored: constraints not satisfied}}
|
|
requires((ErrorRequires<T> || False<T> || True<T>) && False<T>) {} // expected-note {{'unsigned long' does not satisfy 'False'}}
|
|
|
|
void test() {
|
|
aaa(42); // expected-error {{no matching function}}
|
|
bbb(42L); // expected-error{{no matching function}}
|
|
ccc(42UL); // expected-error {{no matching function}}
|
|
ddd(42); // expected-error {{no matching function}}
|
|
eee(42L); // expected-error {{no matching function}}
|
|
fff(42UL); // expected-error {{no matching function}}
|
|
}
|
|
}
|
|
|
|
namespace GH66612 {
|
|
template<typename C>
|
|
auto end(C c) ->int;
|
|
|
|
template <typename T>
|
|
concept Iterator = true;
|
|
|
|
template <typename CT>
|
|
concept Container = requires(CT b) {
|
|
{ end } -> Iterator; // #66612GH_END
|
|
};
|
|
|
|
static_assert(Container<int>);// expected-error{{static assertion failed}}
|
|
// expected-note@-1{{because 'int' does not satisfy 'Container'}}
|
|
// expected-note@#66612GH_END{{because 'end' would be invalid: reference to overloaded function could not be resolved; did you mean to call it?}}
|
|
}
|
|
|
|
namespace GH66938 {
|
|
template <class>
|
|
concept True = true;
|
|
|
|
template <class>
|
|
concept False = false;
|
|
|
|
template <class T>
|
|
void cand(T t)
|
|
requires False<T> || False<T> || False<T> || False<T> || False<T> ||
|
|
False<T> || False<T> || False<T> || False<T> || True<T>
|
|
{}
|
|
|
|
void test() { cand(42); }
|
|
}
|