# module Exception2MessageMapper

Helper module for easily defining exceptions with predefined messages.

## Usage¶ ↑

1.

    class Foo
      extend Exception2MessageMapper
      def_e2message ExistingExceptionClass, "message..."
      def_exception :NewExceptionClass, "message..."[, superclass]
      ...
    end

2.

    module Error
      extend Exception2MessageMapper
      def_e2message ExistingExceptionClass, "message..."
      def_exception :NewExceptionClass, "message..."[, superclass]
      ...
    end
    class Foo
      include Error
      ...
    end

    foo = Foo.new
    foo.Fail ....

3.

    module Error
      extend Exception2MessageMapper
      def_e2message ExistingExceptionClass, "message..."
      def_exception :NewExceptionClass, "message..."[, superclass]
      ...
    end
    class Foo
      extend Exception2MessageMapper
      include Error
      ...
    end

    Foo.Fail NewExceptionClass, arg...
    Foo.Fail ExistingExceptionClass, arg...

### Public Instance Methods

Fail(err = nil, *rest)
Alias for: Raise
Raise(err = nil, *rest) click to toggle source

Fail(err, *rest)

    err:    exception
    rest:   message arguments

    # File lib/e2mmap.rb, line 84
    def Raise(err = nil, *rest)
      E2MM.Raise(self, err, *rest)
    end

Also aliased as: Fail, fail
bind(cl) click to toggle source

    # File lib/e2mmap.rb, line 63
      def bind(cl)
        self.module_eval "#{<<-"begin;"}\n#{<<-"end;"}", __FILE__, __LINE__+1
        begin;
          def Raise(err = nil, *rest)
            Exception2MessageMapper.Raise(self.class, err, *rest)
          end
          alias Fail Raise

          class << self
            undef included
          end
          def self.included(mod)
            mod.extend Exception2MessageMapper
          end
        end;
      end

def_e2message(c, m) click to toggle source

#def_e2message(c, m)

        c:  exception
        m:  message_form
    define exception c with message m.

    # File lib/e2mmap.rb, line 95
    def def_e2message(c, m)
      E2MM.def_e2message(self, c, m)
    end

def_exception(n, m, s = StandardError) click to toggle source

#def_exception(n, m, s)

        n:  exception_name
        m:  message_form
        s:  superclass(default: StandardError)
    define exception named ``c'' with message m.

    # File lib/e2mmap.rb, line 105
    def def_exception(n, m, s = StandardError)
      E2MM.def_exception(self, n, m, s)
    end

fail(err = nil, *rest)
Alias for: Raise