Re: Is self a C pointer?

2020-12-20 Thread ToddAndMargo via perl6-users 

On 12/20/20 9:27 PM, Brad Gilbert wrote:

It doesn't matter if it is a C pointer.

Unless you are working on Moarvm, you should consider them arbitrary 
unique numbers. Like GUID.


That said, yes I'm sure that they represent a location in memory.



That explains it.  Thank you!

I used teh term "C pointer" as the Perl 5 grouches
get pissed at you if you don't.  They have "references"
and will corrrect you instantly if you call their
fancy reference pointer a pointer.

Re: Is self a C pointer?

2020-12-20 Thread William Michels via perl6-users 
On Sun, Dec 20, 2020 at 4:45 PM ToddAndMargo via perl6-users <
perl6-us...@perl.org> wrote:
>
> Hi All,
>
> In the following:
>
> Example 3:
>
> class PrintTest {
> has Str $.Msg;
>
> method PrintMsg()  {
>print "self   = <" ~ self.Msg ~ ">\n";
>print "self   = <" ~ self.Str ~ ">\n";
> }
> }
>
> my $x = PrintTest.new(Msg => "abc");
>
> $x.PrintMsg
> self   = 
> self   = >
>
> is "95224840" a C pointer?  What is that thing?
>
>
> Many thanks,
> -T

Hi Todd, Looks like you're just returning the Raku pointer. You get the
same result printing "self" with-or-without .Str afterwards:


class PrintTest {
   has Str $.Msg;

   method PrintMsg() {
 print "self = <" ~ self ~ ">\n";
 print "self = "; dd self;
 print "self = "; dd self.WHAT;
 put "";
 print "self = <" ~ self.Str ~ ">\n";
 print "self = "; dd self.Str;
 print "self = "; dd self.Str.WHAT;
 put "";
 print "self = <" ~ self.Msg ~ ">\n";
 print "self = "; dd self.Msg;
 print "self = "; dd self.Msg.WHAT;
 }
}

  my $x = PrintTest.new(Msg => "abc");
  $x.PrintMsg;


user@mbook~$ raku ./Todd_classes_1220_2020.p6
self = >
self = PrintTest.new(Msg => "abc")
self = PrintTest

self = >
self = "PrintTest<140382599051224>"
self = Str

self = 
self = "abc"
self = Str
user@mbook~$

If you look at the returns above, calling self with dd (first series) is
actually more informative than stringifying (second series).

HTH, Bill.

Re: Is self a C pointer?

2020-12-20 Thread Brad Gilbert 
It doesn't matter if it is a C pointer.

Unless you are working on Moarvm, you should consider them arbitrary unique
numbers. Like GUID.

That said, yes I'm sure that they represent a location in memory.

On Sun, Dec 20, 2020, 6:45 PM ToddAndMargo via perl6-users <
perl6-us...@perl.org> wrote:

> Hi All,
>
> In the following:
>
> Example 3:
>
> class PrintTest {
> has Str $.Msg;
>
> method PrintMsg()  {
>print "self   = <" ~ self.Msg ~ ">\n";
>print "self   = <" ~ self.Str ~ ">\n";
> }
> }
>
> my $x = PrintTest.new(Msg => "abc");
>
> $x.PrintMsg
> self   = 
> self   = >
>
> is "95224840" a C pointer?  What is that thing?
>
>
> Many thanks,
> -T
>

Is self a C pointer?

2020-12-20 Thread ToddAndMargo via perl6-users 

Hi All,

In the following:

Example 3:

   class PrintTest {
   has Str $.Msg;

   method PrintMsg()  {
  print "self   = <" ~ self.Msg ~ ">\n";
  print "self   = <" ~ self.Str ~ ">\n";
   }
   }

   my $x = PrintTest.new(Msg => "abc");

   $x.PrintMsg
   self   = 
   self   = >

is "95224840" a C pointer?  What is that thing?


Many thanks,
-T