Re^2: What about if (my $var = foo()) { ... }

grinder,
No, I assure you I know they are different and completely understand why postfix is wrong. Please read my response to dragonchild. My questions are specific to this construct.

The reason we don't do:

if (some_func()) {
    my $val = some_func();
}
[download]

Is because some_func may change return values in subsequent invocations. The reason why we don't do:

my $val = some_func();
if ($val) {
    # ... 
}
[download]

Is because we want $val scoped as small as possible.

This only works because of the implicit scoping in perl 5 which is going away in perl 6 (at least in for blocks). I am wondering if there is an alternative way of writing this that accomplishes both things.

Cheers - L~R

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Re^3: What about if (my $var = foo()) { ... } by Cyrnus (Monk) on Dec 29, 2007 at 16:24 UTC
if you want to avoid: `if (my $val = some_func()) { # ... }` [download] and keep as small a scope as possible, how about: `{ my $val = some_func(); if ($val) { # ... } }` [download] John	[reply] [d/l] [select]