[algs] Add hb_identity

a699c6b1 · Behdad Esfahbod · 463cfb42 · a699c6b1
隐藏空白更改
内联并排

Showing with 5 addition and 3 deletion

src/hb-algs.hh src/hb-algs.hh +5 -3

未找到文件。
--- a/src/hb-algs.hh
+++ b/src/hb-algs.hh
@@ -31,9 +31,11 @@
 #include "hb-null.hh"


-/*
- * Pair
- */
+static HB_UNUSED struct
+{
+  template <typename T> T
+  operator () (const T& v) const { return v; }
+} hb_identity;

 template <typename T1, typename T2>
 struct hb_pair_t