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Function: add method to create shallow copy of virtual array

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Creating a shallow copy is sometimes useful to get a unique ptr
for a virtual array when one only has a reference. It shouldn't
be used usually, but sometimes its the fastest way to do correct
ownership handling.
This commit is contained in:
Jacques Lucke
2021-04-29 15:42:32 +02:00
parent 41945454f7
commit 4225a18b35
2 changed files with 59 additions and 3 deletions
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11
source/blender/functions/FN_generic_virtual_array.hh
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@@ -34,6 +34,12 @@ namespace blender::fn {
template<typename T> class GVArray_Typed;
template<typename T> class GVMutableArray_Typed;
class GVArray;
class GVMutableArray;
using GVArrayPtr = std::unique_ptr<GVArray>;
using GVMutableArrayPtr = std::unique_ptr<GVMutableArray>;
/* A generically typed version of `VArray<T>`. */
class GVArray {
protected:
@@ -143,6 +149,8 @@ class GVArray {
return GVArray_Typed<T>(*this);
}
GVArrayPtr shallow_copy() const;
protected:
virtual void get_impl(const int64_t index, void *r_value) const;
virtual void get_to_uninitialized_impl(const int64_t index, void *r_value) const = 0;
@@ -215,9 +223,6 @@ class GVMutableArray : public GVArray {
virtual void *try_get_internal_mutable_varray_impl();
};
using GVArrayPtr = std::unique_ptr<GVArray>;
using GVMutableArrayPtr = std::unique_ptr<GVMutableArray>;
class GVArray_For_GSpan : public GVArray {
protected:
const void *data_ = nullptr;