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Re: Context: compile-time vs. run-time

by ikegami (Patriarch)

on Jan 25, 2009 at 16:50 UTC ( [id://738783]=note: print w/replies, xml )

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```
@x = ( f(), g(), h() );
```
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```
$x = ( f(), g(), h() );
```
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```
( f(), g(), h() );
1;
```
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```
sub { ( f(), g(), h() ) }
```
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```
@x = sub { ( f(), g(), h() ) }->();
```
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```
$x = sub { ( f(), g(), h() ) }->();
```

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use strict;
use warnings;
...
print('cs: ');  $x = sub { ( cx(), cx(), cx() ) }->();  print("\n\n");
print('l:  ');  @x =       ( cx(), cx(), cx() )      ;  print("\n");
print('cl: ');  @x = sub { ( cx(), cx(), cx() ) }->();  print("\n");

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```
v:  vvv
cv: vvv
...

l:  lll
cl: lll
```

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use strict;
use warnings;
...
my $x;
$x =       ( 'abc', 'def' )      ;  # Warns
$x = sub { ( 'abc', 'def' ) }->();  # Doesn't warn

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Useless use of a constant in void context at line 5.

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