Expose `rb_hash_new_capa(long)`

[Feature #18683]

This allows parsers and similar libraries to create Hashes of
a certain capacity in advance. It's useful when the key and values
are streamed, hence `bulk_insert()` can't be used.

1 files changed, 6 insertions, 0 deletions

diff --git a/hash.c b/hash.c
index da85fd35c6..1f2bca12b3 100644
--- a/hash.c
+++ b/hash.c
@@ -1575,6 +1575,12 @@ rb_hash_new_with_size(st_index_t size)
     return ret;
 }
 
+VALUE
+rb_hash_new_capa(long capa)
+{
+    return rb_hash_new_with_size((st_index_t)capa);
+}
+
 static VALUE
 hash_copy(VALUE ret, VALUE hash)
 {