{|(a,a)|}

Ruby Development
1

e$B0J2<$,%(%i!<$K$J$j$^$;$s!#e(B

% ./ruby -vce ‘m() {|(a,a)|}’
ruby 1.9.0 (2007-08-19 patchlevel 0) [i686-linux]
Syntax OK

duplicated argument name e$B$G$O$J$$$G$7$g$&$+!#e(B

% ./ruby -vce ‘m() {|a,a|}’
ruby 1.9.0 (2007-08-19 patchlevel 0) [i686-linux]
-e:1: duplicated argument name
m() {|a,a|}
^

2

In article [email protected],
Tanaka A. [email protected] writes:

e$B0J2<$,%(%i!<$K$J$j$^$;$s!#e(B

% ./ruby -vce ‘m() {|(a,a)|}’
ruby 1.9.0 (2007-08-19 patchlevel 0) [i686-linux]
Syntax OK

duplicated argument name e$B$G$O$J$$$G$7$g$&$+!#e(B

{|a,(a)|} e$B$@$H$J$i$J$/$F!"e(B{|(a),a|}
e$B$@$H$J$k$3$H$K5$$,$D$-$^$7$?!#e(B

% ./ruby -ce ‘m {|a,(a)|}’
Syntax OK
% ./ruby -ce ‘m {|(a),a|}’
-e:1: duplicated argument name
m {|(a),a|}
^

e$B$&$%$`!"$J$s$H$b!#e(B

3

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

At Sun, 19 Aug 2007 15:54:50 +0900,
Tanaka A. wrote in [ruby-dev:31502]:

e$B0J2<$,%(%i!<$K$J$j$^$;$s!#e(B

% ./ruby -vce ‘m() {|(a,a)|}’
ruby 1.9.0 (2007-08-19 patchlevel 0) [i686-linux]
Syntax OK

duplicated argument name e$B$G$O$J$$$G$7$g$&$+!#e(B

e$B$$$C$=e(Bduplicated argument
namee$B$r$J$/$7$A$c$&$C$F$N$O$I$&$G$9$+!#e(B

Index: parse.y

— parse.y (revision 13128)
+++ parse.y (working copy)
@@ -4155,4 +4155,5 @@ f_norm_arg : tCONSTANT
| tIDENTIFIER
{

  •  shadowing_lvar($1);
 $$ = $1;
   }

@@ -4164,5 +4165,4 @@ f_arg_item : f_norm_arg
if (!is_local_id($1))
yyerror(“formal argument must be local variable”);

  •  shadowing_lvar($1);
 arg_var($1);
 $$ = NEW_ARGS_AUX($1, 1);
4

In article [email protected],
Nobuyoshi N. [email protected] writes:

e$B$$$C$=e(Bduplicated argument namee$B$r$J$/$7$A$c$&$C$F$N$O$I$&$G$9$+!#e(B

e$B$"$F$k$H!"0J2<$N$h$&$K$J$j$^$9!#e(B

% ./ruby -ce ‘m() {|(a,a)|}’
-e:1: duplicated argument name
m() {|(a,a)|}
^
% ./ruby -ce ‘m() {|a,a|}’
-e:1: duplicated argument name
m() {|a,a|}
^

e$B$h$m$7$$5sF0$@$H;W$$$^$9!#e(B

e$B$?$@!"$3$NJQ2=$r!V$J$/$7$A$c$&!W$HI=8=$9$k$N$O$h$/$o$+$j$^$;e(B
e$B$s!#e(B

5

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

At Wed, 22 Aug 2007 16:33:42 +0900,
Tanaka A. wrote in [ruby-dev:31593]:

e$B$$$C$=e(Bduplicated argument namee$B$r$J$/$7$A$c$&$C$F$N$O$I$&$G$9$+!#e(B

e$B$?$@!"$3$NJQ2=$r!V$J$/$7$A$c$&!W$HI=8=$9$k$N$O$h$/$o$+$j$^$;e(B
e$B$s!#e(B

e$B$$$d!"@h$N%Q%C%A$O%A%’%C%/$7$Fe(Bsyntax errore$B$K$9$k$b$N$G$9!#e(B

e$B0z?t$N=EJ#$b2D$K$7$A$c$&$H$$$&$N$O;W$$IU$$$?$@$1$G!":n$C$F$^$;$s!#e(B
e$B$^$@!#e(B

6

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

In message “Re: [ruby-dev:31590] Re: {|(a,a)|}”
on Wed, 22 Aug 2007 15:32:10 +0900, Nobuyoshi N.
[email protected] writes:

|> % ./ruby -vce ‘m() {|(a,a)|}’
|> ruby 1.9.0 (2007-08-19 patchlevel 0) [i686-linux]
|> Syntax OK
|>
|> duplicated argument name e$B$G$O$J$$$G$7$g$&$+!#e(B
|
|e$B$$$C$=e(Bduplicated argument namee$B$r$J$/$7$A$c$&$C$F$N$O$I$&$G$9$+!#e(B

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e$B$=$l$O$=$l$H$7$F!"%Q%C%A$O%3%_%C%H$7$F$/$@$5$$!#e(B