From 60fb0baeafc107435dc9e272aba97c0dd5ba5ec2 Mon Sep 17 00:00:00 2001
From: Jean Boussier <byroot@ruby-lang.org>
Date: Tue, 21 Jul 2026 08:57:48 +0200
Subject: [PATCH] Define Range#begin and Range#end as optimized methods

Since Range is a struct, might as well use optimized accessors.
---
 internal/struct.h |  2 ++
 range.c           | 19 ++-----------------
 struct.c          |  6 ++++++
 3 files changed, 10 insertions(+), 17 deletions(-)

diff --git a/internal/struct.h b/internal/struct.h
index ffe1786a89..fc1041bf18 100644
--- a/internal/struct.h
+++ b/internal/struct.h
@@ -47,6 +47,8 @@ struct RStruct {
 VALUE rb_struct_init_copy(VALUE copy, VALUE s);
 VALUE rb_struct_lookup(VALUE s, VALUE idx);
 VALUE rb_struct_s_keyword_init(VALUE klass);
+void rb_struct_define_aref_method(VALUE nstr, ID name, unsigned int off);
+
 static inline long RSTRUCT_EMBED_LEN(VALUE st);
 static inline long RSTRUCT_LEN_RAW(VALUE st);
 static inline int RSTRUCT_LENINT(VALUE st);
diff --git a/range.c b/range.c
index e751c282c3..18d74c54a4 100644
--- a/range.c
+++ b/range.c
@@ -1362,13 +1362,6 @@ range_reverse_each(VALUE range)
  *  Related: Range#first, Range#end.
  */
 
-static VALUE
-range_begin(VALUE range)
-{
-    return RANGE_BEG(range);
-}
-
-
 /*
  *  call-seq:
  *    self.end -> object
@@ -1382,14 +1375,6 @@ range_begin(VALUE range)
  *  Related: Range#begin, Range#last.
  */
 
-
-static VALUE
-range_end(VALUE range)
-{
-    return RANGE_END(range);
-}
-
-
 static VALUE
 first_i(RB_BLOCK_CALL_FUNC_ARGLIST(i, cbarg))
 {
@@ -2980,8 +2965,8 @@ Init_Range(void)
     rb_define_method(rb_cRange, "%", range_percent_step, 1);
     rb_define_method(rb_cRange, "reverse_each", range_reverse_each, 0);
     rb_define_method(rb_cRange, "bsearch", range_bsearch, 0);
-    rb_define_method(rb_cRange, "begin", range_begin, 0);
-    rb_define_method(rb_cRange, "end", range_end, 0);
+    rb_struct_define_aref_method(rb_cRange, id_beg, 0);
+    rb_struct_define_aref_method(rb_cRange, id_end, 1);
     rb_define_method(rb_cRange, "first", range_first, -1);
     rb_define_method(rb_cRange, "last", range_last, -1);
     rb_define_method(rb_cRange, "min", range_min, -1);
diff --git a/struct.c b/struct.c
index 0c6d7330df..c38171b0c2 100644
--- a/struct.c
+++ b/struct.c
@@ -285,6 +285,12 @@ define_aref_method(VALUE nstr, VALUE name, VALUE off)
     rb_add_method_optimized(nstr, SYM2ID(name), OPTIMIZED_METHOD_TYPE_STRUCT_AREF, FIX2UINT(off), METHOD_VISI_PUBLIC);
 }
 
+void
+rb_struct_define_aref_method(VALUE nstr, ID name, unsigned int off)
+{
+    rb_add_method_optimized(nstr, name, OPTIMIZED_METHOD_TYPE_STRUCT_AREF, off, METHOD_VISI_PUBLIC);
+}
+
 static void
 define_aset_method(VALUE nstr, VALUE name, VALUE off)
 {