Hi
I'm experimenting with some operator overloading and I'm getting bitten by the diamond operator. A numeric "less-then" < in list context is parsed as the start of a diamond glob <>
DB<9> sub bla { bless [@_], "Test" }
DB<10> package Test; use overload "<" => sub { warn "works" };
DB<11> bla() < bla
works at (eval 18) ...
DB<12> bla < bla
Unterminated <> operator at (eval 20) ...
I'm aware that I could give bla an empty prototype in line 9 or call it with an empty list (like in line 11), or embrace it in brackets, but I need it to swallow a list of args in other parts.
I'm not very confident there is a way but the almighty monastery is always able to surprise me... ;-)
update
for those wondering, other operators "work"
DB<13> package Test; use overload ">" => sub { warn "works" };
DB<14> bla > bla
works at (eval 21)
-
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 How to display code and escape characters
are good places to start.
|