Question about block parameter syntax

Ruby Development
1

$B!!$5$5$@$G$9!%(B

1.times{
|
x,
y|
}

$B$ODL$j$^$9$,!$(B

1.times{
|
x,
y
|
}

$B$ODL$j$^$;$s!%JD$8$k(B |
$B$,9TF,$KMh$k$N$,$^$:$$$h$&$G$9!%$3$l$O!$$=$&$$$&(B
$B$b$s$G$7$g$&$+!%2<5-$N$h$&$K!$%V%m%C%/%Q%i%a!<%?$K%3%a%s%HF~$l$h$&$H;W$C(B
$B$F5$$E$-$^$7$?!%(B

1.times{
|
x, # xxx
y # yyy
| # <- syntax error, unexpected ‘\n’, expecting ‘|’
}

2

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

$BE:IU$N%Q%C%A$GD>$j$=$&!#$@$l$+3NG’$7$F$b$i$($^$;$s$+!)(B

In message “Re: [ruby-dev:45290] Question about block parameter syntax”
on Sun, 26 Feb 2012 13:59:11 +0900, SASADA Koichi [email protected]
writes:
|
|$B!!$5$5$@$G$9!%(B
|
| 1.times{
| |
| x,
| y|
| }
|
|$B$ODL$j$^$9$,!$(B
|
| 1.times{
| |
| x,
| y
| |
| }
|
|$B$ODL$j$^$;$s!%JD$8$k(B | $B$,9TF,$KMh$k$N$,$^$:$$$h$&$G$9!%$3$l$O!$$=$&$$$&(B
|$B$b$s$G$7$g$&$+!%2<5-$N$h$&$K!$%V%m%C%/%Q%i%a!<%?$K%3%a%s%HF~$l$h$&$H;W$C(B
|$B$F5$$E$-$^$7$?!%(B
|
| 1.times{
| |
| x, # xxx
| y # yyy
| | # ← syntax error, unexpected ‘\n’, expecting ‘|’
| }
|
|–
|// SASADA Koichi at atdot dot net

diff --git a/parse.y b/parse.y
index 3c4f4ce…bde683f 100644
— a/parse.y
+++ b/parse.y
@@ -3727,13 +3727,16 @@ block_param_def : ‘|’ opt_bv_decl ‘|’
;

-opt_bv_decl : none

  • | ‘;’ bv_decls
    +opt_bv_decl : opt_nl
  •    {

  •      $$ = 0;

  •    }
  • | opt_nl ‘;’ bv_decls opt_nl
    {
    /%%%/
    $$ = 0;
    /*%
  •  $$ = $2;

  •  $$ = $3;
   %*/
   }
    ;
    @@ -3788,7 +3791,7 @@ lambda : {
    }
    ;

-f_larglist : ‘(’ f_args opt_bv_decl rparen
+f_larglist : ‘(’ f_args opt_bv_decl ‘)’
{
/%%%/
$$ = $2;

3

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

(12/02/27 13:12), Yukihiro M. wrote:

$BE:IU$N%Q%C%A$GD>$j$=$&!#$@$l$+3NG’$7$F$b$i$($^$;$s$+!)(B

$B$h$5$=$&$G$9!#(Br34832$B$N%F%9%H$ODL$k$3$H$r3NG’$7$^$7$?!#(B