Added slicing operation to DVector via DVector.subarray(int start,int end) method.

Negative indices index from the end of the array.
Indices are range checked before attempting and return appropriate error when out of range.
Binding for RawArray in gdscript to access DVector.subarray() provided.
Documentation of RawArray.subarray() in classes.xml provided.

core/dvector.h

@@ -262,6 +262,34 @@ public:
 			w[bs+i]=r[i];
 	}
 
+	DVector<T> subarray(int p_from, int p_to) {
+
+		if (p_from<0) {
+			p_from=size()+p_from;
+		}
+		if (p_to<0) {
+			p_to=size()+p_to;
+		}
+		if (p_from<0 || p_from>=size()) {
+			DVector<T>& aux=*((DVector<T>*)0); // nullreturn
+			ERR_FAIL_COND_V(p_from<0 || p_from>=size(),aux)
+		}
+		if (p_to<0 || p_to>=size()) {
+			DVector<T>& aux=*((DVector<T>*)0); // nullreturn
+			ERR_FAIL_COND_V(p_to<0 || p_to>=size(),aux)
+		}
+
+		DVector<T> slice;
+		int span=1 + p_to - p_from;
+		slice.resize(span);
+		Read r = read();
+		Write w = slice.write();
+		for (int i=0; i<span; ++i) {
+			w[i] = r[p_from+i];
+		}
+
+		return slice;
+	}
 
 	Error insert(int p_pos,const T& p_val) {
 

core/variant_call.cpp

@@ -517,6 +517,7 @@ static void _call_##m_type##_##m_method(Variant& r_ret,Variant& p_self,const Var
 	VCALL_LOCALMEM1(ByteArray,append);
 	VCALL_LOCALMEM1(ByteArray,append_array);
 	VCALL_LOCALMEM0(ByteArray,invert);
+	VCALL_LOCALMEM2R(ByteArray,subarray);
 
 	VCALL_LOCALMEM0R(IntArray,size);
 	VCALL_LOCALMEM2(IntArray,set);
@@ -1532,6 +1533,7 @@ _VariantCall::addfunc(Variant::m_vtype,Variant::m_ret,_SCS(#m_method),VCALL(m_cl
 	ADDFUNC2(RAW_ARRAY,INT,ByteArray,insert,INT,"idx",INT,"byte",varray());
 	ADDFUNC1(RAW_ARRAY,NIL,ByteArray,resize,INT,"idx",varray());
 	ADDFUNC0(RAW_ARRAY,NIL,ByteArray,invert,varray());
+	ADDFUNC2(RAW_ARRAY,RAW_ARRAY,ByteArray,subarray,INT,"from",INT,"to",varray());
 
 	ADDFUNC0(RAW_ARRAY,STRING,ByteArray,get_string_from_ascii,varray());
 	ADDFUNC0(RAW_ARRAY,STRING,ByteArray,get_string_from_utf8,varray());

doc/base/classes.xml

@@ -30544,6 +30544,17 @@
 				Return the size of the array.
 			</description>
 		</method>
+		<method name="subarray">
+			<return type="RawArray">
+			</return>
+			<argument index="0" name="from" type="int">
+			</argument>
+			<argument index="1" name="to" type="int">
+			</argument>
+			<description>
+				Returns the slice of the [RawArray] between indices (inclusive) as a new [RawArray].  Any negative index is considered to be from the end of the array.
+			</description>
+		</method>
 	</methods>
 	<constants>
 	</constants>