Infix-Custom

Lexically-scoped custom infix operators for Perl.

Infix::Custom owns core's single PL_infix_plugin hook and exposes a small
declarative API for adding your own binary infix operators, scoped lexically
the way the rest of the *::Declare family scopes its keywords. A declared
operator is parsed at compile time and lowered to an ordinary optree -- either
a sub call or a native binary op -- so there is no residual runtime overhead
beyond the work the operator names.

    use utf8;
    use Infix::Custom op => '+|', call => \&merge, prec => 'add';
    my $set = $a +| $b;          # merge($a, $b)

    # or lower straight to a native op (no sub-call overhead):
    use Infix::Custom op => '×', binop => '*', prec => 'mul';
    my $area = $w × $h;          # native multiply

The operator is active only inside the lexical scope that declared it, can be
rebound in nested scopes, and is an ordinary unknown-operator parse error
outside that scope.

REQUIREMENTS

Requires perl 5.38 or newer -- the PL_infix_plugin hook that makes ambient
infix operators possible was added to core in 5.38, so the distribution does
not install on older perls. No non-core dependencies.


INSTALLATION

To install this module, run the following commands:

	perl Makefile.PL
	make
	make test
	make install

SUPPORT AND DOCUMENTATION

After installing, you can find documentation for this module with the
perldoc command.

    perldoc Infix::Custom


LICENSE AND COPYRIGHT

This software is Copyright (c) 2026 by LNATION <email@lnation.org>.

This is free software, licensed under:

  The Artistic License 2.0 (GPL Compatible)