Error::TypeTiny (3)

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NAME

Error::TypeTiny - exceptions for Type::Tiny and friends

SYNOPSIS

   use Data::Dumper;
   use Try::Tiny;
   use Types::Standard qw(Str);
   
   try {
      Str->assert_valid(undef);
   }
   catch {
      my $exception = shift;
      warn "Encountered Error: $exception";
      warn Dumper($exception->explain)
         if $exception->isa("Error::TypeTiny::Assertion");
   };

STATUS

This module is covered by the Type-Tiny stability policy.

DESCRIPTION

When Type::Tiny and its related modules encounter an error, they throw an exception object. These exception objects inherit from Error::TypeTiny.

Constructors

new(%attributes)

Moose-style constructor function.

throw(%attributes)

Constructs an exception and passes it to "die".

Automatically populates "context" and "stack_trace" if appropriate.

Attributes

message

The error message.

context

Hashref containing the package, file and line that generated the error.

stack_trace

A more complete stack trace. This feature requires Devel::StackTrace; use the $StackTrace package variable to switch it on.

Methods

to_string

Returns the message, followed by the context if it is set.

Functions

Error::TypeTiny::croak($format, @args)

Functional-style shortcut to "throw" method. Takes an "sprintf"-style format string and optional arguments to construct the "message".

Overloading

*

Stringification is overloaded to call "to_string".

Package Variables

%Error::TypeTiny::CarpInternal

Serves a similar purpose to %Carp::CarpInternal.

$Error::TypeTiny::StackTrace

Boolean to toggle stack trace generation.

$Error::TypeTiny::LastError

A reference to the last exception object thrown.

CAVEATS

Although Error::TypeTiny objects are thrown for errors produced by Type::Tiny, that doesn't mean every time you use Type::Tiny you'll get Error::TypeTinys whenever you want.

For example, if you use a Type::Tiny type constraint in a Moose attribute, Moose will not call the constraint's "assert_valid" method (which throws an exception). Instead it will call "check" and "get_message" (which do not), and will "confess" an error message of its own. (The $LastError package variable may save your bacon.)

BUGS

Please report any bugs to <rt.cpan.org/Dist/Display.html?Queue=Type-Tiny>.

SEE ALSO

Error::TypeTiny::Assertion, Error::TypeTiny::WrongNumberOfParameters.

Try::Tiny, Try::Tiny::ByClass.

AUTHOR

Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE

This software is copyright (c) 2013-2014, 2017 by Toby Inkster.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

DISCLAIMER OF WARRANTIES