add new functions to std.mem and deprecate others

add std.mem.Span
add std.mem.span
add std.mem.length
add std.mem.indexOfSentinel

deprecate std.mem.len
deprecate std.mem.toSlice
deprecate std.mem.toSliceConst

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/std/builtin.zig b/lib/std/builtin.zig
index de37fda903..a4f0ef269f 100644
--- a/lib/std/builtin.zig
+++ b/lib/std/builtin.zig
@@ -185,6 +185,7 @@ pub const TypeInfo = union(enum) {
         child: type,
         is_allowzero: bool,
 
+        /// This field is an optional type.
         /// The type of the sentinel is the element type of the pointer, which is
         /// the value of the `child` field in this struct. However there is no way
         /// to refer to that type here, so we use `var`.
@@ -206,6 +207,7 @@ pub const TypeInfo = union(enum) {
         len: comptime_int,
         child: type,
 
+        /// This field is an optional type.
         /// The type of the sentinel is the element type of the array, which is
         /// the value of the `child` field in this struct. However there is no way
         /// to refer to that type here, so we use `var`.