I wasn't aware til you posted that there was a validate_with() function. Usually, Params::Validate is as concise as you said you desired. I've also never desired to have case-insensitive named parameters. I suppose that might be desireable. It looks like you'd want to have used the Params::Validate::validate_options() function to set that sort of policy for your package if that that's really common. Then it looks like you can go back to the normal, concise calling form.

So... my experience is that if you want simple cases, that's simple to use. I've wanted slightly more complex things like named validation for my parameters - then I've just made named constants for those.

# Restrict row ids to potential or all valid IDs
# -1 1..inf
use constant ROW_ID => { regex => qr/^$RE{num}{int}$/,
                         callbacks => { valid => sub { local $_ = shif
+t;
                                                         $_ == -1
                                                           or $_ >= 1 
+} } };
# Restrict row ids to things that are actually valid.
# 1 .. inf
use constant VALID_ROW_ID => { regex => qr/^$RE{num}{int}$/,
                               callbacks => { valid => sub { local $_ 
+= shift;
                                                             defined()
+ && $_ >= 1 } } };

sub example_method {
    my $self = shift;
    my %p = validate_pos( @_,
                          { handle => 1,
                            thing  => 1,
                            something_else => VALID_ROW_ID } );
    ...
}

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In reply to Re^3: RFC named parameter syntactic sugar by diotalevi
in thread RFC named parameter syntactic sugar by snowhare

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