NAME

       Dancer::Exception::Base - the base class of all Dancer exceptions

DESCRIPTION

       Dancer::Exception::Base is the base class of all Dancer exception. All core exceptions,
       and all custom exception registered using "Dancer::Exception::register_exception" inherits
       of "Dancer::Exception::Base".

METHODS

   throw
       Throws an exception. It's what "raise" (from Dancer::Exception) uses. Any arguments is set
       as raising parameters. You should not use this method directly, but instead, use "raise"
       from Dancer::Exception.

       Warning, if you want to rethrow an exception, use "rethrow".

   rethrow
       Re-throw the exception, without touching its parameters. Useful if you've caught and
       exception but don't want to handle it, and want to rethrow it.

         try { ... }
         catch {
           my ($e) = @_;
           $e->does('InvalidLogin')
             or $e->rethrow;
           ...
         };

   does
       Given an exception type, returns true if the exception is of the same type.

         try { raise InvalidLogin => 'foo'; }
         catch {
           my ($e) = @_;
           $e->does('InvalidLogin') # true
           ...
         };

       It can receive more than one type, useful for composed exception, or checking multiple
       types at once. "does" performs a logical OR between them:

         try { raise InvalidPassword => 'foo'; }
         catch {
           my ($e) = @_;
           $e->does('InvalidLogin', 'InvalidPassword') # true
           ...
         };

   get_composition
       Returns the composed types of an exception. As every exception inherits of
       Dancer::Exception::Base, the returned list contains at least 'Base', and the exception
       class name.

       Warning, the result is a list, so you should call this method in list context.

         try { raise InvalidPassword => 'foo'; }
         catch {
           my ($e) = @_;
           my @list = $e->get_composition()
           # @list contains ( 'InvalidPassword', 'Base', ... )
         };

   message
       Computes and returns the message associated to the exception. It'll apply the parameters
       that were set at throw time to the message pattern of the exception.

STRINGIFICATION

   string overloading
       All Dancer exceptions properly stringify. When evaluated to a string, they return their
       message, concatenated with their stack trace (see below).

   cmp overloading
       The "cmp" operator is also overloaded, thus all the string operations can be done on
       Dancer's exceptions, as they will all be based on the overloaded "cmp" operator. Dancer
       exceptions will be compared without their stacktraces.

STACKTRACE

       Similarly to Carp, Dancer exceptions stringification appends a string stacktrace to the
       exception message.

       The stacktrace can be a short one, or a long one. Actually the implementation internally
       uses Carp.

       To enable long stack trace (for debugging purpose), you can use the global variable
       "Dancer::Exception::Verbose" (see below).

       The short and long stacktrace snippets are stored within "$self-"{_shortmess}> and
       "$self-"{_longmess}>. Don't touch them or rely on them, they are internals, and will
       change soon.

GLOBAL VARIABLE

   $Dancer::Exception::Verbose
       When set to 1, exceptions will stringify with a long stack trace. This variable is similar
       to $Carp::Verbose. I recommend you use it like that:

         local $Dancer::Exception::Verbose;
         $Dancer::Exception::Verbose = 1;

       All the Carp global variables can also be used to alter the stacktrace generation.