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Ovid (2709)

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Stuff with the Perl Foundation. A couple of patches in the Perl core. A few CPAN modules. That about sums it up.

Journal of Ovid (2709)

Friday January 27, 2006
03:18 PM

HOP::Lexer 0.02

[ #28499 ]

I've uploaded a new version of HOP::Lexer. In "Higher Order Perl", the lexer assumes that you'll be passing an iterator as the first argument to make_lexer. That means if you're trying to lex a single block of text, you have to do this:

my @text  = $text;
my $iter  = sub { shift @text };
my $lexer = make_lexer( $iter, @tokens );

However, lexing a single block of text was common enough that I provided this:

my $lexer = string_lexer( $string, @tokens );

I thought about overloading make_lexer to check if the first argument was a subref or a scalar, but I felt that this might cause strange bugs if people didn't know the difference. I'm probably overly paranoid.

For more information about using a lexer, see my article.

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