@Gianni - thank you.
That works.
The problem in my original code - after removing the whitespace in { * }
- was to have 'Positional @s' instead of 'Positional $s'. Either '@s' or
'Positional $s' work.
Thanks for the rapid feedback.
Richard
On 29/06/2020 19:31, Gianni Ceccarelli wrote:
On 2020-06-29 Richard Hainsworth <rnhainswo...@gmail.com> wrote:
a) I don't understand why the white space matters, but clearly it
does. So the token is '{*}' and not braces around a Whatever-star.
Yep. Weird, but it's a special token.
Not sure why the List:D is not being matched to Positional. Is the
List:D refering to the |c signature capture ??
Your method wants a `Positional @s`, which is an array/list/seq
containing only objects that do the `Positional` role. You're passing
it a list of strings. Either write `@s` (the @ implies you want a
positional thing) or `Positional $s` (a scalar containing a positional
object)
c) Writing out all the code in each method is what I already have.
But I'm looking for ways to factor out common code.
This works::
class NewClass {
has $.debug is rw = False;
has $.value is rw = 'Initial value';
proto method handle( |c ) {
note "before value is $.value" if $.debug;
{*}
note "after value is $.value" if $.debug;
}
multi method handle(Str $s) {
$.value = $s;
say 'in string'
}
multi method handle(@s) {
$.value = @s[0];
say 'in positional'
}
}
my NewClass $x .= new(:debug);
$x.handle('hello world');
$x.handle(<hello world>);
and prints::
before value is Initial value
in string
after value is hello world
before value is hello world
in positional
after value is hello
