nobu	2017-05-10 02:20:00 +0900 (Wed, 10 May 2017)

  New Revision: 58641

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=58641

  Log:
    parse.y: brace after literal arg
    
    * parse.y (symbol, dsym, parser_set_number_literal, parser_yylex):
      set state to END too not only ENDARG and after a literal, so
      that a left brace after it should be a primary block bound to
      the literal, which causes syntax error.
      [ruby-core:81037] [Bug #13547]

  Modified files:
    trunk/parse.y
    trunk/test/ruby/test_syntax.rb
Index: parse.y
===================================================================
--- parse.y	(revision 58640)
+++ parse.y	(revision 58641)
@@ -4049,7 +4049,7 @@ string_dvar	: tGVAR https://github.com/ruby/ruby/blob/trunk/parse.y#L4049
 
 symbol		: tSYMBEG sym
 		    {
-			SET_LEX_STATE(EXPR_ENDARG);
+			SET_LEX_STATE(EXPR_END|EXPR_ENDARG);
 		    /*%%%*/
 			$$ = $2;
 		    /*%
@@ -4066,7 +4066,7 @@ sym		: fname https://github.com/ruby/ruby/blob/trunk/parse.y#L4066
 
 dsym		: tSYMBEG xstring_contents tSTRING_END
 		    {
-			SET_LEX_STATE(EXPR_ENDARG);
+			SET_LEX_STATE(EXPR_END|EXPR_ENDARG);
 		    /*%%%*/
 			$$ = dsym_node($2);
 		    /*%
@@ -6526,7 +6526,7 @@ parser_set_number_literal(struct parser_ https://github.com/ruby/ruby/blob/trunk/parse.y#L6526
 	type = tIMAGINARY;
     }
     set_yylval_literal(v);
-    SET_LEX_STATE(EXPR_ENDARG);
+    SET_LEX_STATE(EXPR_END|EXPR_ENDARG);
     return type;
 }
 
@@ -7884,9 +7884,11 @@ parser_yylex(struct parser_params *parse https://github.com/ruby/ruby/blob/trunk/parse.y#L7884
 		}
 	    }
 	    if (token == tSTRING_END || token == tREGEXP_END || token == tLABEL_END) {
+		const enum lex_state_e next_state =
+		    token == tLABEL_END ? EXPR_BEG|EXPR_LABEL : EXPR_END|EXPR_ENDARG;
 		rb_gc_force_recycle((VALUE)lex_strterm);
 		lex_strterm = 0;
-		SET_LEX_STATE(token == tLABEL_END ? EXPR_BEG|EXPR_LABEL : EXPR_ENDARG);
+		SET_LEX_STATE(next_state);
 	    }
 	}
 	return token;
Index: test/ruby/test_syntax.rb
===================================================================
--- test/ruby/test_syntax.rb	(revision 58640)
+++ test/ruby/test_syntax.rb	(revision 58641)
@@ -952,6 +952,16 @@ eom https://github.com/ruby/ruby/blob/trunk/test/ruby/test_syntax.rb#L952
     assert_equal(:ok, result)
   end
 
+  def test_brace_after_literal_argument
+    bug = '[ruby-core:81037] [Bug #13547]'
+    error = /unexpected '{'/
+    assert_syntax_error('m "x" {}', error)
+    assert_syntax_error('m 1 {}', error, bug)
+    assert_syntax_error('m 1.0 {}', error, bug)
+    assert_syntax_error('m :m {}', error, bug)
+    assert_syntax_error('m :"#{m}" {}', error, bug)
+  end
+
   def test_return_toplevel
     feature4840 = '[ruby-core:36785] [Feature #4840]'
     code = "#{<<~"begin;"}\n#{<<~"end;"}"

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