Parse command-line arguments: Difference between revisions
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(formerly Perl 6) |
(formerly Perl 6) |
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At the end of running any top-level code (which can preprocess the arguments if it likes), Raku automatically examines any remaining arguments and transforms them into a call to a <tt>MAIN</tt> routine, if one is defined. The arguments are parsed based on the signature of the routine, so that options are mapped to named arguments. |
At the end of running any top-level code (which can preprocess the arguments if it likes), Raku automatically examines any remaining arguments and transforms them into a call to a <tt>MAIN</tt> routine, if one is defined. The arguments are parsed based on the signature of the routine, so that options are mapped to named arguments. |
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<syntaxhighlight lang="raku" line> |
<syntaxhighlight lang="raku" line>sub MAIN (Bool :$b, Str :$s = '', Int :$n = 0, *@rest) { |
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sub MAIN (Bool :$b, Str :$s = '', Int :$n = 0, *@rest) { |
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say "Bool: $b"; |
say "Bool: $b"; |
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say "Str: $s"; |
say "Str: $s"; |
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say "Num: $n"; |
say "Num: $n"; |
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say "Rest: @rest[]"; |
say "Rest: @rest[]"; |
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} |
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{{out}} |
{{out}} |
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<pre>$ ./main -h |
<pre>$ ./main -h |
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