Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I discovered what appears to be a fact that logical operators like .EQV. and .NEQV. which are non-Perl can not be overloaded and that there are restrictions on what can be overloaded within Perl itself

This is basically correct, although the wording is strange. Overloading is something applied to objects, not operators; it changes how an object behaves when an operator is applied to it, without changing the default behaviour of that operator.

UPDATE: Perhaps the confusion comes from the term ‘operators’? Unlike some languages, the only kind of ‘operators’ that can be defined in Perl are prefix, and their names must be alphanumeric (or else invoked by &{...}-style trickery); there is no provision in Perl (or, rather, in the parser for Perl) for a user-defined infix or postfix operator—that's the price we pay for the syntactic flexibility that's already available.

the degeneracy of operators
I don't know what this means.
cause certain operators to lose their magical properties (ex, x=, .=)
Perhaps what you mean is that one can overload, say, x and x= separately, and that the overloaded behaviours need have nothing to do with one another? This is true, but not necessary: It's perfectly possible to overload, say, just x, and let Perl figure out for you how to perform x=.

In reply to Re^2: Hints Towards Writing a Module with New Operators by JadeNB
in thread Hints Towards Writing a Module with New Operators by swampyankee

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others rifling through the Monastery: (5)
As of 2021-05-18 13:50 GMT
Find Nodes?
    Voting Booth?
    Perl 7 will be out ...

    Results (180 votes). Check out past polls.