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Using type_caster_base<mpty>::src_and_type directly, removing copy. Also renaming one cast to cast_const_raw_ptr, for clarity.

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This commit is contained in:
Ralf W. Grosse-Kunstleve 2021-01-15 12:18:18 -08:00
parent 45df6826e6
commit f4c27c34e8
1 changed files with 12 additions and 37 deletions
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49
tests/test_classh_wip.cpp
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@ -117,14 +117,14 @@ struct type_caster<mpty> : smart_holder_type_caster_load<mpty> {
}
static handle cast(mpty const *src, return_value_policy policy, handle parent) {
// type_caster_base BEGIN
// clang-format off
auto st = src_and_type(src);
return cast( // Originally type_caster_generic::cast.
st.first, policy, parent, st.second,
make_copy_constructor(src), make_move_constructor(src));
// clang-format on
// type_caster_base END
auto st = type_caster_base<mpty>::src_and_type(src);
return cast_const_raw_ptr( // Originally type_caster_generic::cast.
st.first,
policy,
parent,
st.second,
make_copy_constructor(src),
make_move_constructor(src));
}
static handle cast(mpty *src, return_value_policy policy, handle parent) {
@ -156,35 +156,9 @@ struct type_caster<mpty> : smart_holder_type_caster_load<mpty> {
// clang-format on
using itype = mpty;
// type_caster_base BEGIN
// clang-format off
// Returns a (pointer, type_info) pair taking care of necessary type lookup for a
// polymorphic type (using RTTI by default, but can be overridden by specializing
// polymorphic_type_hook). If the instance isn't derived, returns the base version.
static std::pair<const void *, const type_info *> src_and_type(const itype *src) {
auto &cast_type = typeid(itype);
const std::type_info *instance_type = nullptr;
const void *vsrc = polymorphic_type_hook<itype>::get(src, instance_type);
if (instance_type && !same_type(cast_type, *instance_type)) {
// This is a base pointer to a derived type. If the derived type is registered
// with pybind11, we want to make the full derived object available.
// In the typical case where itype is polymorphic, we get the correct
// derived pointer (which may be != base pointer) by a dynamic_cast to
// most derived type. If itype is not polymorphic, we won't get here
// except via a user-provided specialization of polymorphic_type_hook,
// and the user has promised that no this-pointer adjustment is
// required in that case, so it's OK to use static_cast.
if (const auto *tpi = get_type_info(*instance_type))
return {vsrc, tpi};
}
// Otherwise we have either a nullptr, an `itype` pointer, or an unknown derived pointer, so
// don't do a cast
return type_caster_generic::src_and_type(src, cast_type, instance_type);
}
using Constructor = void *(*)(const void *);
/* Only enabled when the types are {copy,move}-constructible *and* when the type
@ -210,7 +184,8 @@ struct type_caster<mpty> : smart_holder_type_caster_load<mpty> {
// type_caster_base END
// Originally type_caster_generic::cast.
PYBIND11_NOINLINE static handle cast(const void *_src,
PYBIND11_NOINLINE static handle cast_const_raw_ptr(
const void *_src,
return_value_policy policy,
handle parent,
const detail::type_info *tinfo,
@ -316,7 +291,7 @@ struct type_caster<std::shared_ptr<mpty>> : smart_holder_type_caster_load<mpty>
}
auto src_raw_ptr = src.get();
auto st = type_caster<mpty>::src_and_type(src_raw_ptr);
auto st = type_caster_base<mpty>::src_and_type(src_raw_ptr);
if (st.first == nullptr)
return none().release(); // PyErr was set already.
@ -384,7 +359,7 @@ struct type_caster<std::unique_ptr<mpty>> : smart_holder_type_caster_load<mpty>
}
auto src_raw_ptr = src.get();
auto st = type_caster<mpty>::src_and_type(src_raw_ptr);
auto st = type_caster_base<mpty>::src_and_type(src_raw_ptr);
if (st.first == nullptr)
return none().release(); // PyErr was set already.