[Core] Use std type traits to check operations triviality.

core/os/memory.h

@@ -36,6 +36,7 @@
 
 #include <stddef.h>
 #include <new>
+#include <type_traits>
 
 #ifndef PAD_ALIGN
 #define PAD_ALIGN 16 //must always be greater than this at much
@@ -104,7 +105,7 @@ void memdelete(T *p_class) {
 	if (!predelete_handler(p_class)) {
 		return; // doesn't want to be deleted
 	}
-	if (!__has_trivial_destructor(T)) {
+	if (!std::is_trivially_destructible<T>::value) {
 		p_class->~T();
 	}
 
@@ -116,7 +117,7 @@ void memdelete_allocator(T *p_class) {
 	if (!predelete_handler(p_class)) {
 		return; // doesn't want to be deleted
 	}
-	if (!__has_trivial_destructor(T)) {
+	if (!std::is_trivially_destructible<T>::value) {
 		p_class->~T();
 	}
 
@@ -146,7 +147,7 @@ T *memnew_arr_template(size_t p_elements) {
 	ERR_FAIL_COND_V(!mem, failptr);
 	*(mem - 1) = p_elements;
 
-	if (!__has_trivial_constructor(T)) {
+	if (!std::is_trivially_constructible<T>::value) {
 		T *elems = (T *)mem;
 
 		/* call operator new */
@@ -173,7 +174,7 @@ template <typename T>
 void memdelete_arr(T *p_class) {
 	uint64_t *ptr = (uint64_t *)p_class;
 
-	if (!__has_trivial_destructor(T)) {
+	if (!std::is_trivially_destructible<T>::value) {
 		uint64_t elem_count = *(ptr - 1);
 
 		for (uint64_t i = 0; i < elem_count; i++) {

core/templates/cowdata.h

@@ -36,6 +36,7 @@
 #include "core/templates/safe_refcount.h"
 
 #include <string.h>
+#include <type_traits>
 
 template <class T>
 class Vector;
@@ -204,7 +205,7 @@ void CowData<T>::_unref(void *p_data) {
 	}
 	// clean up
 
-	if (!__has_trivial_destructor(T)) {
+	if (!std::is_trivially_destructible<T>::value) {
 		uint32_t *count = _get_size();
 		T *data = (T *)(count + 1);
 
@@ -239,7 +240,7 @@ uint32_t CowData<T>::_copy_on_write() {
 		T *_data = (T *)(mem_new);
 
 		// initialize new elements
-		if (__has_trivial_copy(T)) {
+		if (std::is_trivially_copyable<T>::value) {
 			memcpy(mem_new, _ptr, current_size * sizeof(T));
 
 		} else {
@@ -302,7 +303,7 @@ Error CowData<T>::resize(int p_size) {
 
 		// construct the newly created elements
 
-		if (!__has_trivial_constructor(T)) {
+		if (!std::is_trivially_constructible<T>::value) {
 			for (int i = *_get_size(); i < p_size; i++) {
 				memnew_placement(&_ptr[i], T);
 			}
@@ -311,7 +312,7 @@ Error CowData<T>::resize(int p_size) {
 		*_get_size() = p_size;
 
 	} else if (p_size < current_size) {
-		if (!__has_trivial_destructor(T)) {
+		if (!std::is_trivially_destructible<T>::value) {
 			// deinitialize no longer needed elements
 			for (uint32_t i = p_size; i < *_get_size(); i++) {
 				T *t = &_ptr[i];

core/templates/local_vector.h

@@ -37,6 +37,7 @@
 #include "core/templates/vector.h"
 
 #include <initializer_list>
+#include <type_traits>
 
 // If tight, it grows strictly as much as needed.
 // Otherwise, it grows exponentially (the default and what you want in most cases).
@@ -67,7 +68,7 @@ public:
 			CRASH_COND_MSG(!data, "Out of memory");
 		}
 
-		if (!__has_trivial_constructor(T) && !force_trivial) {
+		if (!std::is_trivially_constructible<T>::value && !force_trivial) {
 			memnew_placement(&data[count++], T(p_elem));
 		} else {
 			data[count++] = p_elem;
@@ -80,7 +81,7 @@ public:
 		for (U i = p_index; i < count; i++) {
 			data[i] = data[i + 1];
 		}
-		if (!__has_trivial_destructor(T) && !force_trivial) {
+		if (!std::is_trivially_destructible<T>::value && !force_trivial) {
 			data[count].~T();
 		}
 	}
@@ -93,7 +94,7 @@ public:
 		if (count > p_index) {
 			data[p_index] = data[count];
 		}
-		if (!__has_trivial_destructor(T) && !force_trivial) {
+		if (!std::is_trivially_destructible<T>::value && !force_trivial) {
 			data[count].~T();
 		}
 	}
@@ -134,7 +135,7 @@ public:
 	_FORCE_INLINE_ U size() const { return count; }
 	void resize(U p_size) {
 		if (p_size < count) {
-			if (!__has_trivial_destructor(T) && !force_trivial) {
+			if (!std::is_trivially_destructible<T>::value && !force_trivial) {
 				for (U i = p_size; i < count; i++) {
 					data[i].~T();
 				}
@@ -151,7 +152,7 @@ public:
 				data = (T *)memrealloc(data, capacity * sizeof(T));
 				CRASH_COND_MSG(!data, "Out of memory");
 			}
-			if (!__has_trivial_constructor(T) && !force_trivial) {
+			if (!std::is_trivially_constructible<T>::value && !force_trivial) {
 				for (U i = count; i < p_size; i++) {
 					memnew_placement(&data[i], T);
 				}

core/templates/paged_array.h

@@ -35,6 +35,8 @@
 #include "core/os/spin_lock.h"
 #include "core/typedefs.h"
 
+#include <type_traits>
+
 // PagedArray is used mainly for filling a very large array from multiple threads efficiently and without causing major fragmentation
 
 // PageArrayPool manages central page allocation in a thread safe matter
@@ -197,7 +199,7 @@ public:
 		uint32_t page = count >> page_size_shift;
 		uint32_t offset = count & page_size_mask;
 
-		if (!__has_trivial_constructor(T)) {
+		if (!std::is_trivially_constructible<T>::value) {
 			memnew_placement(&page_data[page][offset], T(p_value));
 		} else {
 			page_data[page][offset] = p_value;
@@ -209,7 +211,7 @@ public:
 	_FORCE_INLINE_ void pop_back() {
 		ERR_FAIL_COND(count == 0);
 
-		if (!__has_trivial_destructor(T)) {
+		if (!std::is_trivially_destructible<T>::value) {
 			uint32_t page = (count - 1) >> page_size_shift;
 			uint32_t offset = (count - 1) & page_size_mask;
 			page_data[page][offset].~T();
@@ -226,7 +228,7 @@ public:
 
 	void clear() {
 		//destruct if needed
-		if (!__has_trivial_destructor(T)) {
+		if (!std::is_trivially_destructible<T>::value) {
 			for (uint64_t i = 0; i < count; i++) {
 				uint32_t page = i >> page_size_shift;
 				uint32_t offset = i & page_size_mask;
@@ -309,13 +311,13 @@ public:
 				uint32_t to_copy = MIN(page_size - new_remainder, remainder);
 
 				for (uint32_t i = 0; i < to_copy; i++) {
-					if (!__has_trivial_constructor(T)) {
+					if (!std::is_trivially_constructible<T>::value) {
 						memnew_placement(&dst_page[i + new_remainder], T(remainder_page[i + remainder - to_copy]));
 					} else {
 						dst_page[i + new_remainder] = remainder_page[i + remainder - to_copy];
 					}
 
-					if (!__has_trivial_destructor(T)) {
+					if (!std::is_trivially_destructible<T>::value) {
 						remainder_page[i + remainder - to_copy].~T();
 					}
 				}