1smartmatch(3)         User Contributed Perl Documentation        smartmatch(3)
2
3
4

NAME

6       smartmatch - pluggable smart matching backends
7

VERSION

9       version 0.05
10

SYNOPSIS

12         1 ~~ 2; # false
13         {
14             use smartmatch sub { 1 };
15             1 ~~ 2; # true
16
17             no smartmatch;
18             1 ~~ 2; # false
19
20             use smartmatch 'custom';
21             1 ~~ 2; # smartmatch::engine::custom::match(1, 2)
22         }
23         1 ~~ 2; # false
24

DESCRIPTION

26       NOTE: This module is still experimental, and the API may change at any
27       point.  You have been warned!
28
29       This module allows you to override the behavior of the smart match
30       operator ("~~"). "use smartmatch $matcher" hooks into the compiler to
31       replace the smartmatch opcode with a call to a custom subroutine,
32       specified either as a coderef or as a string, which will have
33       "smartmatch::engine::" prepended to it and used as the name of a
34       package in which to find a subroutine named "match".  The subroutine
35       will be called with two arguments, the values on the left and right
36       sides of the smart match operator, and should return the result.
37
38       This module is lexically scoped, and you can call "no smartmatch" to
39       restore the core perl smart matching behavior.
40

FUNCTIONS

42   callback_at_level($level)
43       Returns a coderef which will call smartmatching on its two arguments,
44       with the smartmatch implementation used at caller level $level.
45

BUGS

47       No known bugs.
48
49       Please report any bugs through RT: email "bug-smartmatch at
50       rt.cpan.org", or browse to
51       <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=smartmatch>.
52

SEE ALSO

54       "Smart matching in detail" in perlsyn
55
56       smartmatch::engine::core
57

SUPPORT

59       You can find this documentation for this module with the perldoc
60       command.
61
62           perldoc smartmatch
63
64       You can also look for information at:
65
66       •   AnnoCPAN: Annotated CPAN documentation
67
68           <http://annocpan.org/dist/smartmatch>
69
70       •   CPAN Ratings
71
72           <http://cpanratings.perl.org/d/smartmatch>
73
74       •   RT: CPAN's request tracker
75
76           <http://rt.cpan.org/NoAuth/Bugs.html?Dist=smartmatch>
77
78       •   Search CPAN
79
80           <http://search.cpan.org/dist/smartmatch>
81

AUTHOR

83       Jesse Luehrs <doy at tozt dot net>
84

86       This software is copyright (c) 2012 by Jesse Luehrs.
87
88       This is free software; you can redistribute it and/or modify it under
89       the same terms as the Perl 5 programming language system itself.
90
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93perl v5.34.0                      2022-01-21                     smartmatch(3)
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