https://git.ruby-lang.org/ruby.git/commit/?id=dd7f0c87c9

From dd7f0c87c9da8e695c38a6529deb6e0f24f6d06c Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Fri, 20 Dec 2019 23:36:19 +0900
Subject: Hoisted out new_case3


diff --git a/parse.y b/parse.y
index 9f7e3a6..3aaa291 100644
--- a/parse.y
+++ b/parse.y
@@ -472,6 +472,7 @@ static NODE *new_array_pattern(struct parser_params *p, NODE *constant, NODE *pr https://github.com/ruby/ruby/blob/trunk/parse.y#L472
 static NODE *new_array_pattern_tail(struct parser_params *p, NODE *pre_args, int has_rest, ID rest_arg, NODE *post_args, const YYLTYPE *loc);
 static NODE *new_hash_pattern(struct parser_params *p, NODE *constant, NODE *hshptn, const YYLTYPE *loc);
 static NODE *new_hash_pattern_tail(struct parser_params *p, NODE *kw_args, ID kw_rest_arg, const YYLTYPE *loc);
+static NODE *new_case3(struct parser_params *p, NODE *val, NODE *pat, const YYLTYPE *loc);
 
 static NODE *new_kw_arg(struct parser_params *p, NODE *k, const YYLTYPE *loc);
 static NODE *args_with_numbered(struct parser_params*,NODE*,int);
@@ -1572,8 +1573,7 @@ expr		: command_call https://github.com/ruby/ruby/blob/trunk/parse.y#L1573
 		    {
 			p->in_kwarg = !!$<num>3;
 		    /*%%%*/
-			$$ = NEW_CASE3($1, NEW_IN($5, 0, 0, &@5), &@$);
-			rb_warn0L(nd_line($$), "Pattern matching is experimental, and the behavior may change in future versions of Ruby!");
+			$$ = new_case3(p, $1, NEW_IN($5, 0, 0, &@5), &@$);
 		    /*% %*/
 		    /*% ripper: case!($1, in!($5, Qnil, Qnil)) %*/
 		    }
@@ -2860,8 +2860,7 @@ primary		: literal https://github.com/ruby/ruby/blob/trunk/parse.y#L2860
 		  k_end
 		    {
 		    /*%%%*/
-			$$ = NEW_CASE3($2, $4, &@$);
-			rb_warn0L(nd_line($$), "Pattern matching is experimental, and the behavior may change in future versions of Ruby!");
+			$$ = new_case3(p, $2, $4, &@$);
 		    /*% %*/
 		    /*% ripper: case!($2, $4) %*/
 		    }
@@ -11453,6 +11452,15 @@ new_hash_pattern_tail(struct parser_params *p, NODE *kw_args, ID kw_rest_arg, co https://github.com/ruby/ruby/blob/trunk/parse.y#L11452
     return node;
 }
 
+static NODE *
+new_case3(struct parser_params *p, NODE *val, NODE *pat, const YYLTYPE *loc)
+{
+    NODE *node = NEW_CASE3(val, pat, loc);
+
+    rb_warn0L(nd_line(node), "Pattern matching is experimental, and the behavior may change in future versions of Ruby!");
+    return node;
+}
+
 static NODE*
 dsym_node(struct parser_params *p, NODE *node, const YYLTYPE *loc)
 {
-- 
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