The only way you are going to get around the syntax problems is to only compile the code in question if the module exists....
eval "use Foo::Bar";
eval <<"END" unless $@;
sub my_method { # Code }
END
but because that is going to introduce it's own problems, I would opt for moving that code into a module or a library...
eval "use Foo::Bar";
if ( $@ ) {
require "have-foo-bar-library.pl";
} else {
require "dont-have-foo-bar-library.pl";
}
As for the second part, because you are using eval BLOCK rather than eval STRING, the use will still be evaluated at compile time, rather than at run time. You could get the effect you are looking for by breaking the use up into it's components though...
eval { require Foo::Bar; import Foo::Bar; }
-
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.
|