Add mem.buffer_from_slice_panicking proc

Author: Xotchkass

core/mem/mem.odin

@@ -461,6 +461,35 @@ buffer_from_slice :: proc "contextless" (backing: $T/[]$E) -> [dynamic]E {
 	}
 }
 
+/*
+Create a dynamic array from slice.
+
+This procedure creates a dynamic array, using slice `backing` as the backing
+buffer for the dynamic array. The resulting dynamic array will panic 
+if attempted to grow beyond the size of the specified slice.
+*/
+@(require_results)
+buffer_from_slice_panicking :: proc "contextless" (backing: $T/[]$E) -> [dynamic]E {
+	return transmute([dynamic]E)Raw_Dynamic_Array {
+			data = raw_data(backing),
+			len = 0,
+			cap = len(backing),
+			allocator = Allocator {
+				procedure = proc( 
+				_   : rawptr,
+				_   : Allocator_Mode,
+				_, _: int,
+				_   : rawptr,
+				_   : int,
+				loc := #caller_location,
+				) -> ([]byte, Allocator_Error) {
+					panic("atempted to grow slice-backed buffer", loc) 
+				},
+				data = nil,
+			},
+		}
+}
+
 /*
 Check whether a number is a power of two.