From e73a68ebc322516a42821f502d6d5de5bfa1eb47 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@gmail.com>
Date: Mon, 27 May 2019 02:59:21 +0900
Subject: [PATCH] Support op, cvar, iver, gvar and kw that follow on symbeg in
 IRB

---
 lib/irb/ruby-lex.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/irb/ruby-lex.rb b/lib/irb/ruby-lex.rb
index b2ed7b4b3f..ea2158b8b2 100644
--- a/lib/irb/ruby-lex.rb
+++ b/lib/irb/ruby-lex.rb
@@ -256,7 +256,8 @@ class RubyLex
         start_token << t
         end_type << :on_regexp_end
       when :on_symbeg
-        if (i + 1) < @tokens.size and @tokens[i + 1][1] != :on_ident and @tokens[i + 1][1] != :on_const
+        acceptable_single_tokens = %i{on_ident on_const on_op on_cvar on_ivar on_gvar on_kw}
+        if (i + 1) < @tokens.size and acceptable_single_tokens.all?{ |t| @tokens[i + 1][1] != t }
           start_token << t
           end_type << :on_tstring_end
         end