Function Copy

compiler/natives/src/reflect/reflect.go:661–699

gopherjs:replace

(dst, src Value)

//gopherjs:replace
func Copy(dst, src Value) int {
	dk := dst.kind()
	if dk != Array && dk != Slice {
		panic(&ValueError{"reflect.Copy", dk})
	}
	if dk == Array {
		dst.mustBeAssignable()
	}
	dst.mustBeExported()

	sk := src.kind()
	var stringCopy bool
	if sk != Array && sk != Slice {
		stringCopy = sk == String && dst.typ().Elem().Kind() == abi.Uint8
		if !stringCopy {
			panic(&ValueError{"reflect.Copy", sk})
		}
	}
	src.mustBeExported()

	if !stringCopy {
		typesMustMatch("reflect.Copy", toRType(dst.typ().Elem()), toRType(src.typ().Elem()))
	}

	dstVal := dst.object()
	if dk == Array {
		dstVal = jsType(SliceOf(toRType(dst.typ().Elem()))).New(dstVal)
	}

	srcVal := src.object()
	if sk == Array {
		srcVal = jsType(SliceOf(toRType(src.typ().Elem()))).New(srcVal)
	}

	if stringCopy {
		return js.Global.Call("$copyString", dstVal, srcVal).Int()
	}
	return js.Global.Call("$copySlice", dstVal, srcVal).Int()
}

//gopherjs:replace
func methodReceiver(op string, v Value, methodIndex int) (rcvrtype *abi.Type, t *funcType, fn unsafe.Pointer) {