pub_soft/pybind11
3
0
Fork 0
mirror of https://github.com/pybind/pybind11.git synced 2026-06-04 13:34:24 +08:00
Code Issues Packages Projects Releases Wiki Activity

internals: optimize std::unordered_map internals with noexcept (#5960)

Browse Source
This commit is contained in:
Aaron Gokaslan
2026-02-17 02:00:56 -05:00
committed by GitHub
parent ccb7129f54
commit ac286c932f
1 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
include/pybind11/detail/internals.h
View File

@@ -191,7 +191,7 @@ inline bool same_type(const std::type_info &lhs, const std::type_info &rhs) {
} }
struct type_hash { struct type_hash {
size_t operator()(const std::type_index &t) const { size_t operator()(const std::type_index &t) const noexcept {
size_t hash = 5381; size_t hash = 5381;
const char *ptr = t.name(); const char *ptr = t.name();
while (auto c = static_cast<unsigned char>(*ptr++)) { while (auto c = static_cast<unsigned char>(*ptr++)) {
@@ -202,7 +202,7 @@ struct type_hash {
}; };
struct type_equal_to { struct type_equal_to {
bool operator()(const std::type_index &lhs, const std::type_index &rhs) const { bool operator()(const std::type_index &lhs, const std::type_index &rhs) const noexcept {
return lhs.name() == rhs.name() || std::strcmp(lhs.name(), rhs.name()) == 0; return lhs.name() == rhs.name() || std::strcmp(lhs.name(), rhs.name()) == 0;
} }
}; };
@@ -218,7 +218,7 @@ template <typename value_type>
using type_map = std::unordered_map<std::type_index, value_type, type_hash, type_equal_to>; using type_map = std::unordered_map<std::type_index, value_type, type_hash, type_equal_to>;
struct override_hash { struct override_hash {
size_t operator()(const std::pair<const PyObject *, const char *> &v) const { size_t operator()(const std::pair<const PyObject *, const char *> &v) const noexcept {
size_t value = std::hash<const void *>()(v.first); size_t value = std::hash<const void *>()(v.first);
value ^= std::hash<const void *>()(v.second) + 0x9e3779b9 + (value << 6) + (value >> 2); value ^= std::hash<const void *>()(v.second) + 0x9e3779b9 + (value << 6) + (value >> 2);
return value; return value;