Rational 1.12

Tadayoshi_F · July 17, 2006, 1:36pm

e$B$U$J$P$G$9!#e(B

e$B86$5$s$Ne(B rational 1.12 e$B$G!"$D$.$N$h$&$K%(%i!<$K$J$j$^$9!#e(B

$ ruby -v -r rational -e ‘p “13.0/4”.to_r’
ruby 1.8.4 (2005-12-24) [i386-freebsd5.4]
-e:1:in `to_r’: Error of Implementation (rb_rat_eval_str). (fatal)
from -e:1

e$B;X?tI=8=$G2r<a$r4V0c$($^$9!#e(B

‘9e0’.to_r #=> 9/1
‘-9e0’.to_r #=> 9/1

e$B%9%i%C%7%e$,$i$_$GHyL/$J2r<a$r$7$^$9!#e(B

‘9/’.to_r # ZeroDivisionError

e$B>.?tE@$G=*$k$H%(%i!<$K$J$j$^$9!#e(B

Float(‘9.’) #=> 9.0
Rational(‘9.’) # ArgumentError

Tadayoshi_F · July 17, 2006, 4:18pm

e$B$J$+$@$G$9!#e(B

At Mon, 17 Jul 2006 20:34:42 +0900,
Tadayoshi F. wrote in [ruby-dev:29032]:

e$B>.?tE@$G=*$k$H%(%i!<$K$J$j$^$9!#e(B

Float(‘9.’) #=> 9.0
Rational(‘9.’) # ArgumentError

e$B$3$l$Oe(BFloate$B$N$[$&$,$*$+$7$$$h$&$J!#e(B

Index: util.c

RCS file: /cvs/ruby/src/ruby/util.c,v
retrieving revision 1.52
diff -p -U 2 -r1.52 util.c
— util.c 9 Jun 2006 23:17:59 -0000 1.52
+++ util.c 17 Jul 2006 14:11:12 -0000
@@ -768,7 +768,7 @@ ruby_strtod(
*/

for ( ; c = *p; p++) {

for ( ; (c = *p) != ‘\0’; p++) {
if (!ISDIGIT©) {

```
  if (c != '.' || hasPoint) {
```

  if (c != '.' || hasPoint || ISDIGIT(p[1])) {
  break;
  }

Tadayoshi_F · July 17, 2006, 5:06pm

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:29036] Re: rational 1.12”
on Mon, 17 Jul 2006 23:15:01 +0900, [email protected] writes:

e$B$G$9$M!#%3%_%C%H$7$F$/$@$5$$!#e(B

Tadayoshi_F · July 17, 2006, 5:25pm

e$B$U$J$P$G$9!#e(B

Float(‘9.’) #=> 9.0
Rational(‘9.’) # ArgumentError

e$B$3$l$Oe(BFloate$B$N$[$&$,$*$+$7$$$h$&$J!#e(B

e$BJ}?K$,$h$/$o$+$i$J$/$J$C$F$-$?$s$G$9$,!"e(Bruby
e$B$N;z6g2r@O$K9g$;$k$H$+e(B?

Tadayoshi_F · July 18, 2006, 1:47am

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:29040] Re: rational 1.12”
on Tue, 18 Jul 2006 00:24:24 +0900, Tadayoshi F.
[email protected] writes:

|> > Float(‘9.’) #=> 9.0
|> > Rational(‘9.’) # ArgumentError
|>
|> e$B$3$l$Oe(BFloate$B$N$[$&$,$*$+$7$$$h$&$J!#e(B
|
|e$BJ}?K$,$h$/$o$+$i$J$/$J$C$F$-$?$s$G$9$,!"e(Bruby e$B$N;z6g2r@O$K9g$;$k$H$+e(B?

e$B$=$&$G$9!#e(B

Tadayoshi_F · July 18, 2006, 5:49am

e$B$U$J$P$G$9!#e(B

|> > Float(‘9.’) #=> 9.0
|> > Rational(‘9.’) # ArgumentError
|>
|> e$B$3$l$Oe(BFloate$B$N$[$&$,$*$+$7$$$h$&$J!#e(B
|
|e$BJ}?K$,$h$/$o$+$i$J$/$J$C$F$-$?$s$G$9$,!"e(Bruby e$B$N;z6g2r@O$K9g$;$k$H$+e(B?

e$B$=$&$G$9!#e(B

e$B$G$"$l$P!"e(B.9 e$B$b%@%a$G$7$g$&$+!#e(B

Float(’.9’) #=> 0.9
Rational(’.9’) #=> 9/10
BigDecimal(’.9’) #=> #BigDecimal:8236934,‘0.9E0’,4(8)

e$BJ8L.$N0c$$$r9M$($:$K!"$H$K$+$/F1$8$K$9$k$H$$$&$J$i!"e(BFloat(‘080’)
e$B$,DL$Ce(B
e$B$F$7$^$&$N$b$*$+$7$$$H$$$($J$/$b$J$$$+$b!#e(B

e$B:#!"5$$,$D$$$?$1$I!“e(BRational(nil)
e$B$,DL$k$N$O$*$+$7$$$+$b!”$H;W$C$?$i!"e(B
Float(nil) e$B$O%@%a$G!"e(BInteger(nil)
e$B$O$$$$$N$+!#$@$s$@$s2r$i$J$/$J$C$F$-e(B
e$B$?e(B…e$B!#e(B

Tadayoshi_F · July 20, 2006, 2:32pm

e$B86$G$9!#e(B

String#to_r e$B$r:#=q$-49$($F$$$k$N$G$9$,!"$J$+$J$+e(B
e$B;EMM$,GD0.$G$-$^$;$s!#e(B

[ruby-dev:28868] e$B$G!"$^$D$b$H$5$s$O!"e(B

“9e+_9”.to_f #=> 9000000000.0

e$B$@$H8@$C$F$$$^$9$,!“e(B_e$B$,e(Bee$B$ND>A0$K$”$k>l9g$O$I$&$G$7$g$&!#e(B

“9_e+9”.to_f #=> 9000000000.0

e$B$G$7$g$&$+!)e(B

Tadayoshi_F · July 18, 2006, 7:11am

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In message “Re: [ruby-dev:29050] Re: rational 1.12”
on Tue, 18 Jul 2006 12:46:52 +0900, Tadayoshi F.
[email protected] writes:

|e$B$G$"$l$P!"e(B.9 e$B$b%@%a$G$7$g$&$+!#e(B

e$B$=$3$^$G87L)$K$9$k$H:#EY$O5U$K;H$$$K$/$$$s$G!"!Ve(B.9e$B!W$O5v$=$&e(B
e$B$H;W$$$^$9!#e(B

|e$B:#!"5$$,$D$$$?$1$I!“e(BRational(nil) e$B$,DL$k$N$O$*$+$7$$$+$b!”$H;W$C$?$i!"e(B
|Float(nil) e$B$O%@%a$G!"e(BInteger(nil) e$B$O$$$$$N$+!#$@$s$@$s2r$i$J$/$J$C$F$-e(B
|e$B$?e(B…e$B!#e(B

e$BItJ,:GE,2=$N=8$^$j$G$9$+$i$M$(!#e(B

e$B2~$a$F9M$($^$7$?$,!"e(BInteger(nil)e$B0J30$ODL$i$J$/$F$h$$$H;W$$$^e(B
e$B$9!#e(B1.9e$B$G$Oe(BInteger(nil)e$B$b6X;_$7$h$&$+$J!#e(B

Tadayoshi_F · July 20, 2006, 7:05pm

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:29088] Re: rational 1.12”
on Thu, 20 Jul 2006 21:29:14 +0900, Shin-ichiro HARA
[email protected] writes:

e$B8@$C$F$^$;$se(B(e$B3N$+$K!VBP=h$7$^$9!W$H$7$+8@$C$F$J$$e(B)e$B!#e(B1.9e$B$G;ne(B
e$B$7$F$b$i$&$H$o$+$j$^$9$,!"e(B

“9e+_9”.to_f #=> 9.0

e$B$G$9!#$D$^$j!"!Ve(Be+9e$B!W$O!Ve(B9e$B$N8e$m$K$D$$$?%4%!W$G$9!#e(B

e$B;d$N%$%a!<%8$@$He(B"e+9"e$B$,!Ve(B9e$B$N8e$m$K$D$$$?%4%!W$G!“e(B9.0e$B$K$J$ke(B
e$B$O$:$G$9$,!”$J$<$+e(B1.9e$B$G$be(B9000000000.0e$B$K$J$j$^$9$M!#e(BFloat()e$B$Ge(B
e$B$O%(%i!<$K$J$k$s$@$1$I$J!#$3$l$be(B9.0e$B$K$9$k$h$&$KD>$7$^$9!#e(B

Tadayoshi_F · July 20, 2006, 7:56pm

e$B86$G$9!#e(B

e$B8@$C$F$^$;$se(B(e$B3N$+$K!VBP=h$7$^$9!W$H$7$+8@$C$F$J$$e(B)e$B!#e(B1.9e$B$G;ne(B
e$B$7$F$b$i$&$H$o$+$j$^$9$,!"e(B

“9e+_9”.to_f #=> 9.0

e$B$G$9!#$D$^$j!"!Ve(Be+9e$B!W$O!Ve(B9e$B$N8e$m$K$D$$$?%4%!W$G$9!#e(B

e$B8@$C$F$^$9!#e(B[ruby-dev:28872] e$B$G!"!J$"!";2>HHV9f4V0c$($?$C!Ke(B

e$B$h$C$F!“e(B(e$B$H$j$”$($:e(B1.9e$B$Ge(B)e$B=$@5$7$^$9!#JQ998e$N7k2L$O0J2<$NDLe(B
e$B$j$G$9!#e(B
…
“9e+_9”.to_i #=> 9
“9e+_9”.to_f #=> 9000000000.0

BigDecimale$B$de(BRationale$B$K$D$$$F$O$3$l$K=`$:$k$Y$-$@$H;W$$$^$9!#e(B

e$B$H!#e(B

e$B8@$C$F$^$;$se(B(e$B3N$+$K!VBP=h$7$^$9!W$H$7$+8@$C$F$J$$e(B)e$B!#e(B1.9e$B$G;ne(B
e$B$7$F$b$i$&$H$o$+$j$^$9$,!"e(B

“9e+_9”.to_f #=> 9.0

e$B$G$9!#$D$^$j!"!Ve(Be+9e$B!W$O!Ve(B9e$B$N8e$m$K$D$$$?%4%!W$G$9!#e(B

e$B$=$A$i$NJ}$,<u$1F~$l$d$9$$$+$J!#e(B

|_e$B$,e(Bee$B$ND>A0$K$"$k>l9g$O$I$&$G$7$g$&!#e(B
|
|“9_e+9”.to_f #=> 9000000000.0
|
|e$B$G$7$g$&$+!)e(B

e$B;d$N%$%a!<%8$@$He(B"e+9"e$B$,!Ve(B9e$B$N8e$m$K$D$$$?%4%!W$G!“e(B9.0e$B$K$J$ke(B
e$B$O$:$G$9$,!”$J$<$+e(B1.9e$B$G$be(B9000000000.0e$B$K$J$j$^$9$M!#e(BFloat()e$B$Ge(B
e$B$O%(%i!<$K$J$k$s$@$1$I$J!#$3$l$be(B9.0e$B$K$9$k$h$&$KD>$7$^$9!#e(B

e$BN;2r$7$^$7$?!#$=$l$G$O$=$&$$$&$3$H$G!#e(B

Tadayoshi_F · July 21, 2006, 1:21am

e$B86$G$9!#e(B

e$B$U$J$P$G$9!#e(B

e$B86$5$s$Ne(B rational 1.12 e$B$G!"$D$.$N$h$&$K%(%i!<$K$J$j$^$9!#e(B

$ ruby -v -r rational -e ‘p “13.0/4”.to_r’
ruby 1.8.4 (2005-12-24) [i386-freebsd5.4]
-e:1:in `to_r’: Error of Implementation (rb_rat_eval_str). (fatal)
from -e:1

e$B$&$&!"$3$l$+$i$O!“e(B"13.0/4”.to_r e$B$Oe(B “13.0”.to_r
e$B$H2r<a$9$k$3$H$K$7$^$9!#e(B

e$B;X?tI=8=$G2r<a$r4V0c$($^$9!#e(B

‘9e0’.to_r #=> 9/1
‘-9e0’.to_r #=> 9/1

e$B%_%9$G$7$?!#e(B

e$B%9%i%C%7%e$,$i$_$GHyL/$J2r<a$r$7$^$9!#e(B

‘9/’.to_r # ZeroDivisionError

‘9/’.to_r e$B$Oe(B ‘9’.to_r e$B$H$$$&2r<a$r$9$Y$-$G$7$?!#e(B

e$B>.?tE@$G=*$k$H%(%i!<$K$J$j$^$9!#e(B

Float(‘9.’) #=> 9.0
Rational(‘9.’) # ArgumentError

e$B$3$l$O%(%i!<$K$9$k$3$H$K$J$C$?$N$G$9$M!#e(B

e$BJ8;zNs$N2r<a$N%k!<%F%#%s$re(Brubye$BK\BN$N$H6&MQ$7$h$&$H$$$&e(B
e$BLnK>$O<N$F$FFH<+O)@~$G9T$/$3$H$K$7$^$7$?!#e(B

e$B8=>ue(B(rational-1.13)e$B$O$3$&$J$C$F$$$^$9e(B:

“”.to_r => 0 Rational("") => ArgumentError
“+7 7”.to_r => 7 Rational("+7 7") => ArgumentError
“+7_”.to_r => 7 Rational("+7_") => ArgumentError
“+7".to_r => 0 Rational("+7") => ArgumentError
“-7 7”.to_r => -7 Rational("-7 7") => ArgumentError
"7".to_r => 7 Rational("7”) => ArgumentError
“7_7”.to_r => 77 Rational(“7_7”) => 77
“".to_r => 0 Rational("”) => ArgumentError
“+7".to_r => 0 Rational("+7”) => ArgumentError
“_7”.to_r => 0 Rational("_7") => ArgumentError

“+7E 1”.to_r => 7 Rational("+7E 1") => ArgumentError
“+7E1”.to_r => 70 Rational("+7E1") => 70
“+7_7.7_7E-0_1”.to_r => 7777/1000 Rational("+7_7.7_7E-0_1") =>
7777/1000
“- 7.7”.to_r => -77/10 Rational("- 7.7") => -77/10
“-7.7”.to_r => -77/10 Rational("-7.7") => -77/10
“-7.7E-2”.to_r => -77/1000 Rational("-7.7E-2") => -77/1000
“-7.7E_1”.to_r => -77/10 Rational("-7.7E_1") => ArgumentError
“-7E+1".to_r => -7 Rational("-7E+1") => ArgumentError
"-7E-1".to_r => -7/10 Rational("-7E-1”) => ArgumentError
“-7E1”.to_r => -70 Rational("-7E1") => -70
“-7E1_”.to_r => -70 Rational("-7E1_") => ArgumentError
“-7E_1”.to_r => -7 Rational("-7E_1") => ArgumentError
“-7_7.7_”.to_r => -777/10 Rational("-7_7.7_") => ArgumentError
“.”.to_r => 0 Rational(".") => ArgumentError
“.7”.to_r => 7/10 Rational(".7") => 7/10
“0.7”.to_r => 7/10 Rational(“0.7”) => 7/10
“7.”.to_r => 7 Rational(“7.”) => ArgumentError
“7.1E_1”.to_r => 71/10 Rational(“7.1E_1”) => ArgumentError
“7.7”.to_r => 77/10 Rational(“7.7”) => 77/10
“7.7/3”.to_r => 77/10 Rational(“7.7/3”) => ArgumentError
“7.7E-2”.to_r => 77/1000 Rational(“7.7E-2”) => 77/1000
“7.7_”.to_r => 77/10 Rational(“7.7_”) => ArgumentError
“7.E_1”.to_r => 7 Rational(“7.E_1”) => ArgumentError
“7.".to_r => 7 Rational("7.”) => ArgumentError
“7.7".to_r => 7 Rational("7.7") => ArgumentError
“7.E1".to_r => 7 Rational(“7.E1") => ArgumentError
“7.E_1".to_r => 7 Rational(“7.E_1") => ArgumentError
"77.7”.to_r => 777/10 Rational("77.7”) => ArgumentError
“7E”.to_r => 7 Rational(“7E”) => ArgumentError
“7E+1".to_r => 7 Rational(“7E+1") => ArgumentError
“7E-1”.to_r => 7/10 Rational(“7E-1”) => 7/10
“7E0”.to_r => 7 Rational(“7E0”) => 7
“7E1”.to_r => 70 Rational(“7E1”) => 70
"7E1”.to_r => 70 Rational("7E1”) => ArgumentError
“7E_1”.to_r => 7 Rational(“7E_1”) => ArgumentError
"7.”.to_r => 7 Rational("7.”) => ArgumentError
"7.7”.to_r => 7 Rational(“7_.7_”) => ArgumentError
“7_.7".to_r => 7 Rational("7.7") => ArgumentError
“7_E+1”.to_r => 7 Rational(“7_E+1”) => ArgumentError
“7_E1”.to_r => 7 Rational(“7_E1”) => ArgumentError
“7_E_1”.to_r => 7 Rational(“7_E_1”) => ArgumentError
“E1”.to_r => 0 Rational(“E1”) => ArgumentError
".7”.to_r => 0 Rational(".7") => ArgumentError
".7".to_r => 0 Rational("._7") => ArgumentError
“_7.”.to_r => 0 Rational("_7.") => ArgumentError

“-7 / 3_”.to_r => -7/3 Rational("-7 / 3_") => ArgumentError
“-7/”.to_r => -7 Rational("-7/") => ArgumentError
“-7/-3_”.to_r => 7/3 Rational("-7/-3_") => ArgumentError
“-7/3_”.to_r => -7/3 Rational("-7/3_") => ArgumentError
“7 / - 3”.to_r => -7/3 Rational(“7 / - 3”) => -7/3
“7 / 3”.to_r => 7/3 Rational(“7 / 3”) => 7/3
“7 / 3_”.to_r => 7/3 Rational(“7 / 3_”) => ArgumentError
“7/”.to_r => 7 Rational(“7/”) => ArgumentError
“7/-3_”.to_r => -7/3 Rational(“7/-3_”) => ArgumentError
“7/3_”.to_r => 7/3 Rational(“7/3_”) => ArgumentError

e$B5!3#E*$KLVMe$7$h$&$H$7$?$1$I!"$J$+$J$+Fq$7$/$F;W$$$D$$$?$N$@$1!#e(B

Tadayoshi_F · July 22, 2006, 12:50am

e$B86$G$9!#e(B

|e$BJ}?K$,$h$/$o$+$i$J$/$J$C$F$-$?$s$G$9$,!"e(Bruby e$B$N;z6g2r@O$K9g$;$k$H$+e(B?

e$B$=$&$G$9!#e(B

e$B0l1~3NG’$7$^$9!#e(BFloat(“9.e1”) e$B$b%(%i!<$G$9$h$M!)e(B

Tadayoshi_F · July 22, 2006, 2:15am

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:29110] Re: rational 1.12”
on Sat, 22 Jul 2006 07:47:48 +0900, Shin-ichiro HARA
[email protected] writes:

|e$B0l1~3NG’$7$^$9!#e(BFloat(“9.e1”) e$B$b%(%i!<$G$9$h$M!)e(B

e$B$=$&$G$9!#e(B