From 5e275dd2af4d9d24cdb1cfc0f232f348dae9c2cd Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@gmail.com>
Date: Tue, 28 May 2019 03:23:52 +0900
Subject: Treat :@1, :@@1, @1, and @@1 correctly to check termination

---
 lib/irb/ruby-lex.rb | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'lib')

diff --git a/lib/irb/ruby-lex.rb b/lib/irb/ruby-lex.rb
index 4121fa1f7c..b3985fb838 100644
--- a/lib/irb/ruby-lex.rb
+++ b/lib/irb/ruby-lex.rb
@@ -136,6 +136,15 @@ class RubyLex
       return false
     elsif @tokens.size >= 2 and @tokens[-2][1] == :on_kw and (@tokens[-2][2] == 'begin' or @tokens[-2][2] == 'else')
       return false
+    elsif @tokens.size >= 3 and @tokens[-3][1] == :on_symbeg and @tokens[-2][1] == :on_ivar
+      # This is for :@a or :@1 because :@1 ends with EXPR_FNAME
+      return false
+    elsif @tokens.size >= 2 and @tokens[-2][1] == :on_ivar and @tokens[-2][2] =~ /\A@\d+\z/
+      # This is for @1
+      return false
+    elsif @tokens.size >= 2 and @tokens[-2][1] == :on_cvar and @tokens[-1][1] == :on_int
+      # This is for @@1 or :@@1 and ends with on_int because it's syntax error
+      return false
     elsif !@tokens.empty? and @tokens.last[2] == "\\\n"
       return true
     elsif @tokens.size >= 2 and @tokens[-2][3].anybits?(continued_bits)
@@ -199,6 +208,12 @@ class RubyLex
         #   example:
         #     method / f /
         return false
+      when /numbered parameter outside block/
+        # "numbered parameter outside block"
+        #
+        #   example:
+        #     :@1
+        return false
       end
     ensure
       $VERBOSE = verbose
-- 
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