2a07509c8d
[P2641R4](https://wg21.link/P2641R4) This new builtin function is declared `consteval`. Support for `-fexperimental-new-constant-interpreter` will be added in a later patch. --------- Co-authored-by: cor3ntin <corentinjabot@gmail.com>
94 lines
3.9 KiB
C++
94 lines
3.9 KiB
C++
// RUN: %clang_cc1 -std=c++23 -fsyntax-only -Wno-unused %s -verify=cxx20-cxx26
|
|
// RUN: %clang_cc1 -std=c++20 -fsyntax-only -Wno-unused %s -verify=cxx20,cxx20-cxx26
|
|
// RUN: %clang_cc1 -std=c++17 -fsyntax-only -Wno-unused %s -verify=precxx20,cxx11-cxx17
|
|
// RUN: %clang_cc1 -std=c++14 -fsyntax-only -Wno-unused %s -verify=precxx20,cxx11-cxx17
|
|
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -Wno-unused %s -verify=precxx20,cxx11-cxx17
|
|
// RUN: %clang_cc1 -std=c++03 -fsyntax-only -Wno-unused %s -verify=precxx20
|
|
// RUN: %clang_cc1 -std=c++98 -fsyntax-only -Wno-unused %s -verify=precxx20
|
|
// RUN: %clang_cc1 -x c -std=c23 -fsyntax-only -Wno-unused %s -verify=c
|
|
|
|
#if __has_builtin(__builtin_is_within_lifetime)
|
|
#error has the builtin
|
|
#else
|
|
#error does not have the builtin
|
|
#endif
|
|
// cxx20-cxx26-error@-4 {{has the builtin}}
|
|
// precxx20-error@-3 {{does not have the builtin}}
|
|
// c-error@-4 {{does not have the builtin}}
|
|
|
|
#if __has_constexpr_builtin(__builtin_is_within_lifetime)
|
|
#error has the constexpr builtin
|
|
#else
|
|
#error does not have the constexpr builtin
|
|
#endif
|
|
// cxx20-cxx26-error@-4 {{has the constexpr builtin}}
|
|
// precxx20-error@-3 {{does not have the constexpr builtin}}
|
|
// c-error@-4 {{does not have the constexpr builtin}}
|
|
|
|
#if __cplusplus < 201103L
|
|
#define static_assert __extension__ _Static_assert
|
|
#define CONSTEXPR11
|
|
#else
|
|
#define CONSTEXPR11 constexpr
|
|
#endif
|
|
|
|
static const int i1 = 0;
|
|
static_assert(__builtin_is_within_lifetime(&i1), "");
|
|
// precxx20-error@-1 {{use of undeclared identifier '__builtin_is_within_lifetime'}}
|
|
// c-error@-2 {{use of undeclared identifier '__builtin_is_within_lifetime'}}
|
|
|
|
#if !defined(__cplusplus) || __cplusplus >= 201102L
|
|
constexpr int i2 = 0;
|
|
static_assert(__builtin_is_within_lifetime(&i2), "");
|
|
// cxx11-cxx17-error@-1 {{use of undeclared identifier '__builtin_is_within_lifetime'}}
|
|
// c-error@-2 {{use of undeclared identifier '__builtin_is_within_lifetime'}}
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
template<typename T>
|
|
CONSTEXPR11 bool f1(T i) { // #f1
|
|
return __builtin_is_within_lifetime(&i); // #f1-consteval-call
|
|
}
|
|
|
|
bool(&fp1)(int) = f1<int>;
|
|
// cxx20-cxx26-error@-1 {{cannot take address of immediate function 'f1<int>' outside of an immediate invocation}}
|
|
// cxx20-cxx26-note@#f1 {{declared here}}
|
|
// cxx20-cxx26-note@#f1-consteval-call {{'f1<int>' is an immediate function because its body contains a call to a consteval function '__builtin_is_within_lifetime' and that call is not a constant expression}}
|
|
// precxx20-error@#f1-consteval-call {{use of undeclared identifier '__builtin_is_within_lifetime'}}
|
|
// precxx20-note@-5 {{in instantiation of function template specialization 'f1<int>' requested here}}
|
|
#else
|
|
void f1(int i) {
|
|
__builtin_is_within_lifetime(&i);
|
|
// c-error@-1 {{use of undeclared identifier '__builtin_is_within_lifetime'}}
|
|
}
|
|
#endif
|
|
|
|
#if __cplusplus >= 202002L
|
|
constexpr void f2() {
|
|
int i = 0;
|
|
if consteval { // cxx20-warning {{consteval if}}
|
|
__builtin_is_within_lifetime(&i);
|
|
}
|
|
}
|
|
void(&fp2)() = f2;
|
|
|
|
constexpr void f3() {
|
|
__builtin_is_within_lifetime(&i1);
|
|
}
|
|
void(&fp3)() = f3;
|
|
|
|
constexpr void f4() {
|
|
&__builtin_is_within_lifetime;
|
|
// cxx20-cxx26-error@-1 {{builtin functions must be directly called}}
|
|
// cxx20-cxx26-error@-2 {{cannot take address of consteval function '__builtin_is_within_lifetime' outside of an immediate invocation}}
|
|
__builtin_is_within_lifetime();
|
|
// cxx20-cxx26-error@-1 {{too few arguments to function call, expected 1, have 0}}
|
|
// cxx20-cxx26-error@-2 {{cannot take address of consteval function '__builtin_is_within_lifetime' outside of an immediate invocation}}
|
|
int* not_constexpr;
|
|
__builtin_is_within_lifetime(not_constexpr);
|
|
// cxx20-cxx26-error@-1 {{call to consteval function '__builtin_is_within_lifetime' is not a constant expression}}
|
|
// cxx20-cxx26-note@-2 {{read of non-constexpr variable 'not_constexpr' is not allowed in a constant expression}}
|
|
// cxx20-cxx26-note@-4 {{declared here}}
|
|
}
|
|
#endif
|