Viewing file:  srcloc2.C (2.76 KB) -rw-r--r--
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// { dg-do compile { target c++20 } }
namespace std {
inline namespace _8 { }
namespace _8 {
struct source_location {
struct __impl {
const char *_M_file_name;
const char *_M_function_name;
unsigned int _M_line, _M_column;
};
const __impl *__ptr;
constexpr source_location () : __ptr (nullptr) {}
static consteval source_location
current (const void *__p = __builtin_source_location ()) {
source_location __ret;
__ret.__ptr = static_cast <const __impl *> (__p);
return __ret;
}
constexpr const char *file_name () const {
return __ptr ? __ptr->_M_file_name : "";
}
constexpr const char *function_name () const {
return __ptr ? __ptr->_M_function_name : "";
}
constexpr unsigned line () const {
return __ptr ? __ptr->_M_line : 0;
}
constexpr unsigned column () const {
return __ptr ? __ptr->_M_column : 0;
}
};
}
}
using namespace std;
consteval source_location
bar (const source_location x = source_location::current ())
{
return x;
}
void
foo (const char **p, unsigned *q)
{
constexpr source_location s = source_location::current ();
constexpr source_location t = bar ();
p[0] = s.file_name ();
p[1] = s.function_name ();
q[0] = s.line ();
q[1] = s.column ();
p[2] = t.file_name ();
p[3] = t.function_name ();
q[2] = t.line ();
q[3] = t.column ();
constexpr const char *r = s.file_name ();
}
source_location s3 = source_location::current ();
template <int N>
constexpr source_location
baz ()
{
return source_location::current ();
}
#define A \
source_location s[3] = { source_location::current (), \
source_location::current (), \
source_location::current () }
source_location *
boo ()
{
static A;
return &s[0];
}
constexpr source_location s1 = baz <0> ();
constexpr source_location s2 = baz <1> ();
const source_location *p1 = &s1;
const source_location *p2 = &s2;
static_assert (source_location::current ().line () == __LINE__);
static_assert (source_location::current ().column () == 41);
constexpr bool
quux ()
{
const char *file1 = source_location::current ().file_name ();
const char *file2 = __FILE__;
const char *function1 = source_location::current ().function_name ();
const char *function2 = __PRETTY_FUNCTION__;
int line1 = source_location::current ().line ();
int line2 = __LINE__ - 1;
int column
= source_location::current ().column ();
int i = 0;
for (; file1[i]; i++)
if (file1[i] != file2[i])
return false;
if (file2[i])
return false;
for (i = 0; function1[i]; i++)
if (function1[i] != function2[i])
return false;
if (function2[i])
return false;
if (line1 != line2)
return false;
if (column != 32)
return false;
return true;
}
static_assert (quux ());
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