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.\" ========================================================================
.\"
.IX Title "Mojo::DynamicMethods 3"
.TH Mojo::DynamicMethods 3 "2023-03-08" "perl v5.26.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
Mojo::DynamicMethods \- Fast dynamic method dispatch
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&  package MyClass;
\&  use Mojo::Base \-base, \-signatures;
\&
\&  use Mojo::DynamicMethods \-dispatch;
\&
\&  sub BUILD_DYNAMIC ($class, $method, $dyn_methods) {
\&    return sub {...};
\&  }
\&
\&  sub add_helper ($self, $name, $cb) {
\&    Mojo::DynamicMethods::register \*(AqMyClass\*(Aq, $self, $name, $cb;
\&  }
\&
\&  package main;
\&
\&  # Generate methods dynamically (and hide them from "$obj\->can(...)")
\&  my $obj = MyClass\->new;
\&  $obj\->add_helper(foo => sub { warn \*(AqHello Helper!\*(Aq });
\&  $obj\->foo;
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Mojo::DynamicMethods provides dynamic method dispatch for per-object helper methods without requiring use of
\&\f(CW\*(C`AUTOLOAD\*(C'\fR.
.PP
To opt your class into dynamic dispatch simply pass the \f(CW\*(C`\-dispatch\*(C'\fR flag.
.PP
.Vb 1
\&  use Mojo::DynamicMethods \-dispatch;
.Ve
.PP
And then implement a \f(CW\*(C`BUILD_DYNAMIC\*(C'\fR method in your class, making sure that the key you use to lookup methods in
\&\f(CW$dyn_methods\fR is the same thing you pass as \f(CW$ref\fR to \*(L"register\*(R".
.PP
.Vb 8
\&  sub BUILD_DYNAMIC ($class, $method, $dyn_methods) {
\&    return sub ($self, @args) {
\&      my $dynamic = $dyn_methods\->{$self}{$method};
\&      return $self\->$dynamic(@args) if $dynamic;
\&      my $package = ref $self;
\&      croak qq{Can\*(Aqt locate object method "$method" via package "$package"};
\&    };
\&  }
.Ve
.PP
Note that this module will summon \fBCthulhu\fR, use it at your own risk!
.SH "FUNCTIONS"
.IX Header "FUNCTIONS"
Mojo::DynamicMethods implements the following functions.
.SS "register"
.IX Subsection "register"
.Vb 1
\&  Mojo::DynamicMethods::register $class, $ref, $name, $cb;
.Ve
.PP
Registers the method \f(CW$name\fR as eligible for dynamic dispatch for \f(CW$class\fR, and sets \f(CW$cb\fR to be looked up for
\&\f(CW$name\fR by reference \f(CW$ref\fR in a dynamic method constructed by \f(CW\*(C`BUILD_DYNAMIC\*(C'\fR.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Mojolicious, Mojolicious::Guides, <https://mojolicious.org>.