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tu_local_descr with src_loc experiment

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This commit is contained in:
Ralf W. Grosse-Kunstleve 2022-06-28 08:42:44 -07:00
parent 3ea37002b1
commit 11e858d0da
1 changed files with 51 additions and 8 deletions
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59
include/pybind11/detail/type_caster_odr_guard.h
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@ -8,7 +8,7 @@
// (https://en.cppreference.com/w/cpp/language/tu_local), a C++20 feature, but
// all tested C++17 compilers support this feature already.
#if !defined(PYBIND11_TYPE_CASTER_ODR_GUARD_ON) && !defined(PYBIND11_TYPE_CASTER_ODR_GUARD_OFF) \
&& (defined(_MSC_VER) || defined(PYBIND11_CPP17))
&& ((defined(_MSC_VER) && _MSC_VER >= 1920) || defined(PYBIND11_CPP17))
# define PYBIND11_TYPE_CASTER_ODR_GUARD_ON
#endif
@ -41,6 +41,19 @@
PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
PYBIND11_NAMESPACE_BEGIN(detail)
struct src_loc {
const char *file;
unsigned line;
// constexpr src_loc() : file(nullptr), line(0) {}
constexpr src_loc(const char *file, unsigned line) : file(file), line(line) {}
static constexpr src_loc here(const char *file = __builtin_FILE(),
unsigned line = __builtin_LINE()) {
return src_loc(file, line);
}
};
inline std::unordered_map<std::type_index, std::string> &type_caster_odr_guard_registry() {
static std::unordered_map<std::type_index, std::string> reg;
return reg;
@ -67,14 +80,23 @@ inline const char *source_file_line_basename(const char *sfl) {
inline void type_caster_odr_guard_impl(const std::type_info &intrinsic_type_info,
const char *source_file_line,
const src_loc &sloc,
bool throw_disabled) {
// std::cout cannot be used here: static initialization could be incomplete.
# define PYBIND11_DETAIL_TYPE_CASTER_ODR_GUARD_IMPL_PRINTF_OFF
# define PYBIND11_DETAIL_TYPE_CASTER_ODR_GUARD_IMPL_PRINTF_ON
# ifdef PYBIND11_DETAIL_TYPE_CASTER_ODR_GUARD_IMPL_PRINTF_ON
std::fprintf(stdout,
"\nTYPE_CASTER_ODR_GUARD_IMPL %s %s\n",
clean_type_id(intrinsic_type_info.name()).c_str(),
source_file_line);
std::string source_file_line_from_sloc
= std::string(sloc.file) + ':' + std::to_string(sloc.line);
std::fprintf(stdout,
"%s %s %s\n",
(source_file_line_from_sloc == source_file_line ? " SLOC_SAME"
: " SLOC_DIFF"),
clean_type_id(intrinsic_type_info.name()).c_str(),
source_file_line_from_sloc.c_str());
std::fflush(stdout);
# endif
auto ins = type_caster_odr_guard_registry().insert(
@ -101,16 +123,36 @@ inline void type_caster_odr_guard_impl(const std::type_info &intrinsic_type_info
namespace {
template <size_t N, typename... Ts>
struct tu_local_descr : descr<N, Ts...> {
using descr_t = descr<N, Ts...>;
using descr_t::descr_t;
struct tu_local_descr {
char text[N + 1];
src_loc sloc;
constexpr tu_local_descr(src_loc sloc = src_loc::here()) : text{'\0'}, sloc(sloc){};
// NOLINTNEXTLINE(google-explicit-constructor)
constexpr tu_local_descr(char const (&s)[N + 1], src_loc sloc = src_loc::here())
: tu_local_descr(s, make_index_sequence<N>(), sloc) {}
template <size_t... Is>
constexpr tu_local_descr(char const (&s)[N + 1],
index_sequence<Is...>,
src_loc sloc = src_loc::here())
: text{s[Is]..., '\0'}, sloc(sloc) {}
template <typename... Chars>
// NOLINTNEXTLINE(google-explicit-constructor)
constexpr tu_local_descr(char c, Chars... cs, src_loc sloc = src_loc::here())
: text{c, static_cast<char>(cs)..., '\0'}, sloc(sloc) {}
};
template <size_t N>
constexpr tu_local_descr<N - 1> tu_local_const_name(char const (&text)[N]) {
return tu_local_descr<N - 1>(text);
constexpr tu_local_descr<N - 1> tu_local_const_name(char const (&text)[N],
src_loc sloc = src_loc::here()) {
return tu_local_descr<N - 1>(text, sloc);
}
constexpr tu_local_descr<0> tu_local_const_name(char const (&)[1],
src_loc sloc = src_loc::here()) {
return tu_local_descr<0>(sloc);
}
constexpr tu_local_descr<0> tu_local_const_name(char const (&)[1]) { return {}; }
struct tu_local_no_data_always_false {
explicit operator bool() const noexcept { return false; }
@ -165,6 +207,7 @@ tu_local_no_data_always_false
type_caster_odr_guard_impl(
typeid(IntrinsicType),
get_type_caster_source_file_line<TypeCasterType>::source_file_line.text,
get_type_caster_source_file_line<TypeCasterType>::source_file_line.sloc,
PYBIND11_DETAIL_TYPE_CASTER_ODR_GUARD_IMPL_THROW_DISABLED);
return tu_local_no_data_always_false();
}();