From d365fd5a024254d7c105a62a015a7ea29ccf3e5d Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Fri, 14 Jun 2019 18:09:45 +0900
Subject: [PATCH] An operator is not allowed just after `|>`

https://twitter.com/yukihiro_matz/status/1139454774640726019
---
 parse.y                  | 8 ++++----
 test/ruby/test_syntax.rb | 1 +
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/parse.y b/parse.y
index 58f0e4b615..ff0afed99e 100644
--- a/parse.y
+++ b/parse.y
@@ -1499,28 +1499,28 @@ expr		: command_call
 		| pipeline
 		;
 
-pipeline	: expr tPIPE operation2 opt_paren_args
+pipeline	: expr tPIPE operation opt_paren_args
 		    {
 		    /*%%%*/
 			$$ = new_command_qcall(p, ID2VAL(idPIPE), $1, $3, $4, Qnull, &@3, &@$);
 		    /*% %*/
 		    /*% ripper: command_call!($1, ID2VAL(idPIPE), $3, $4) %*/
 		    }
-		| expr tPIPE operation2 opt_paren_args brace_block
+		| expr tPIPE operation opt_paren_args brace_block
 		    {
 		    /*%%%*/
 			$$ = new_command_qcall(p, ID2VAL(idPIPE), $1, $3, $4, $5, &@3, &@$);
 		    /*% %*/
 		    /*% ripper: method_add_block!(command_call!($1, ID2VAL(idPIPE), $3, $4), $5) %*/
 		    }
-		| expr tPIPE operation2 command_args
+		| expr tPIPE operation command_args
 		    {
 		    /*%%%*/
 			$$ = new_command_qcall(p, ID2VAL(idPIPE), $1, $3, $4, Qnull, &@3, &@$);
 		    /*% %*/
 		    /*% ripper: command_call!($1, ID2VAL(idPIPE), $3, $4) %*/
 		    }
-		| expr tPIPE operation2 command_args do_block
+		| expr tPIPE operation command_args do_block
 		    {
 		    /*%%%*/
 			$$ = new_command_qcall(p, ID2VAL(idPIPE), $1, $3, $4, $5, &@3, &@$);
diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index d2638c79b4..4e8ffe56fb 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -1385,6 +1385,7 @@ eom
     assert_equal("121", eval('x = 12 |> pow(2) |> to_s 11'))
     assert_equal(12, x)
     assert_equal([2, 4, 6], eval("1.. |> take 3\n|> map do @1 * 2 end"))
+    assert_syntax_error('a|>-b', /unexpected '-'/)
   end
 
   private