parse.y: refine message for gvar w/o identitirs

* parse.y (parse_gvar): separate message for gvar without
  non-space characters from message for invalid identitirs.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50480 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 2 deletions

diff --git a/parse.y b/parse.y
index 63c8d45480..54850e7e63 100644
--- a/parse.y
+++ b/parse.y
@@ -7675,8 +7675,13 @@ parse_gvar(struct parser_params *parser, const enum lex_state_e last_state)
 
       default:
 	if (!parser_is_identchar()) {
-	    pushback(c);
-	    compile_error(PARSER_ARG "`$%c' is not allowed as a global variable name", c);
+	    if (c == -1 || ISSPACE(c)) {
+		compile_error(PARSER_ARG "`$' without identifiers is not allowed as a global variable name");
+	    }
+	    else {
+		pushback(c);
+		compile_error(PARSER_ARG "`$%c' is not allowed as a global variable name", c);
+	    }
 	    return 0;
 	}
       case '0':