parse.y: separate numeric literal

* parse.y (parser_yylex): separate numeric literal from succeeding
  token, and treat 'e' as floating point number only if followed by
  exponent part.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42197 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 5 deletions

diff --git a/parse.y b/parse.y
index fa5609a649..d4e73e0072 100644
--- a/parse.y
+++ b/parse.y
@@ -7542,14 +7542,18 @@ parser_yylex(struct parser_params *parser)
 		    if (seen_e) {
 			goto decode_num;
 		    }
-		    tokadd(c);
-		    seen_e++;
-		    is_float++;
 		    nondigit = c;
 		    c = nextc();
-		    if (c != '-' && c != '+') continue;
+		    if (c != '-' && c != '+' && !ISDIGIT(c)) {
+			pushback(c);
+			nondigit = 0;
+			goto decode_num;
+		    }
+		    tokadd(nondigit);
+		    seen_e++;
+		    is_float++;
 		    tokadd(c);
-		    nondigit = c;
+		    nondigit = (c == '-' || c == '+') ? c : 0;
 		    break;
 
 		  case '_':	/* `_' in number just ignored */