From: nobu.nokada@...
Date: 2002-01-04T22:12:40+09:00
Subject: [ruby-talk:30211] Re: Bug?

At Fri, 4 Jan 2002 20:37:04 +0900,
Hi,

Martin Kahlert <martin.kahlert@infineon.com> wrote:
> I came across this strangeness in 1.6.6:
> irb(main):001:0> p 1e0
> 1.0
> nil
> irb(main):002:0> p 0e0
> SyntaxError: compile error
> (irb):2: parse error
>         from (irb):2
> 
> Is this a bug?

I think so, and guess 0x_0 and 0b_0 should be error oppositely.


Index: parse.y
===================================================================
RCS file: /cvs/ruby/src/ruby/parse.y,v
retrieving revision 1.138
diff -u -2 -p -r1.138 parse.y
--- parse.y	2001/12/31 05:23:53	1.138
+++ parse.y	2002/01/04 12:47:53
@@ -3329,13 +3329,15 @@ yylex()
 		    /* hexadecimal */
 		    c = nextc();
-		    do {
-			if (c == '_') {
-			    seen_uc = 1;
-			    continue;
-			}
-			if (!ISXDIGIT(c)) break;
-			seen_uc = 0;
-			tokadd(c);
-		    } while (c = nextc());
+		    if (ISXDIGIT(c)) {
+			do {
+			    if (c == '_') {
+				seen_uc = 1;
+				continue;
+			    }
+			    if (!ISXDIGIT(c)) break;
+			    seen_uc = 0;
+			    tokadd(c);
+			} while (c = nextc());
+		    }
 		    pushback(c);
 		    tokfix();
@@ -3350,13 +3352,15 @@ yylex()
 		    /* binary */
 		    c = nextc();
-		    do {
-			if (c == '_') {
-			    seen_uc = 1;
-			    continue;
-			}
-			if (c != '0'&& c != '1') break;
-			seen_uc = 0;
-			tokadd(c);
-		    } while (c = nextc());
+		    if (c == '0' || c != '1') {
+			do {
+			    if (c == '_') {
+				seen_uc = 1;
+				continue;
+			    }
+			    if (c != '0' && c != '1') break;
+			    seen_uc = 0;
+			    tokadd(c);
+			} while (c = nextc());
+		    }
 		    pushback(c);
 		    tokfix();
@@ -3388,5 +3392,5 @@ yylex()
 		    yyerror("Illegal octal digit");
 		}
-		else if (c == '.') {
+		else if (c == '.' || c == 'e' || c == 'E' || c == 'f' || c == 'F') {
 		    tokadd('0');
 		}


-- 
Nobu Nakada