our is a lexically scoped alias for a global variable. Will create the global if it didn't exist already.
See the following code:
our $a = "foo";
print "$Our::a <--shouldn't print anything here\n";
print "$main::a <--should print 'a' from the main symbol table here\n"
print "$a <--should also print 'a' from the main symbol table he
+re\n\t\tdue to lexically scoped alias\n";
<--shouldn't print anything here
foo <--should print 'a' from the main symbol table here
foo <--should also print 'a' from the main symbol table here
due to lexically scoped alias
By default any global variables you create automatically populate the "main" symbol table, %main::
. With a package declaration you could change which symbol table you are populating when you declare unqualified variables.
But our is a lexical decalaration. In the case above the declaration was file scoped. That's why I still got something back when I gave it an unqualified print statement print "$a\n"
after the package declaration.
Don't forget just because it's a lexically scoped variable, it's still an alias for a global variable. Hence when I reassigned $a = "foo" with the our declaration, I blew away the old value.
Any comments are welcome.
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