The general idea is that perl compiles the entire 'unit' (typically a file, or a string eval), then execute it. There are two exceptions:
- A BEGIN block. The block is run right after it is compiled. The block is compiled entirely before it's run.
- A use statement. This one is run as soon as it's compiled. One might see a use statement as a require and an import call inside a BEGIN block. The side-effect of a use statement is that the used module is compiled and executed.
So, it your case, the order is (ignoring all the other modules):
- Compile main up to the 'use Gbl;' line.
- Run 'use Gbl;'. This causes:
- Compile Gbl.pm.
- Run the code in the Gbl package.
- Call 'Gbl->import' (if Gbl::import is defined).
- Compile the BEGIN block.
- Execute the code in the BEGIN block.
- Compile the rest of main.pl.
- Run main.pl (except the already run use statements and BEGIN blocks).
-
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.
|