remove runtime.NewString

internal/runtime/z_slice.go

@@ -31,11 +31,6 @@ type Slice struct {
 	cap  int
 }
 
-// NilSlice returns a nil slice.
-func NilSlice() Slice {
-	return Slice{nil, 0, 0}
-}
-
 // NewSlice creates a new slice.
 func NewSlice(data unsafe.Pointer, len, cap int) Slice {
 	return Slice{data, len, cap}
@@ -55,21 +50,6 @@ func NewSlice3(base unsafe.Pointer, eltSize, cap, i, j, k int) (s Slice) {
 	return
 }
 
-// SliceLen returns the length of a slice.
-func SliceLen(s Slice) int {
-	return s.len
-}
-
-// SliceCap returns the capacity of a slice.
-func SliceCap(s Slice) int {
-	return s.cap
-}
-
-// SliceData returns the data pointer of a slice.
-func SliceData(s Slice) unsafe.Pointer {
-	return s.data
-}
-
 // SliceAppend append elem data and returns a slice.
 func SliceAppend(src Slice, data unsafe.Pointer, num, etSize int) Slice {
 	if etSize == 0 {

internal/runtime/z_string.go

@@ -35,17 +35,6 @@ type String struct {
 	len  int
 }
 
-// EmptyString returns an empty string.
-func EmptyString() String {
-	return String{nil, 0}
-}
-
-// TODO(xsw): unsafe.String
-// NewString creates a new string.
-func NewString(data unsafe.Pointer, len int) String {
-	return String{data, len}
-}
-
 // StringCat concatenates two strings.
 func StringCat(a, b String) String {
 	n := a.len + b.len