zig

commit 81d9403dcea172ce2fdb44610c9350821109adae (tree)
parent 4c0163b69bafce753ee31e1bfa3ae0b5ba37fbf2
Author: Wink Saville <wink@saville.com>
Date:   Sun, 30 Sep 2018 00:02:01 -0700

Add SegmentedList.shrink

I was exploring std.zig.Tokenizer and wanted to compare performance of
arrays, SegmentedList and ArrayList and needed SegmentedList.shrink
to make the comparison "fair".

Diffstat:
M
std/segmented_list.zig
 | 
5
+++++

1 file changed, 5 insertions(+), 0 deletions(-)
diff --git a/std/segmented_list.zig b/std/segmented_list.zig
@@ -201,6 +201,11 @@ pub fn SegmentedList(comptime T: type, comptime prealloc_item_count: usize) type
             self.dynamic_segments = self.allocator.shrink([*]T, self.dynamic_segments, new_cap_shelf_count);
         }
 
+        pub fn shrink(self: *Self, new_len: usize) void {
+            assert(new_len <= self.len);
+            self.len = new_len;
+        }
+
         pub fn uncheckedAt(self: var, index: usize) AtType(@typeOf(self)) {
             if (index < prealloc_item_count) {
                 return &self.prealloc_segment[index];