Method: Handshake.catch_contract

Defined in:
lib/handshake.rb

.catch_contract(mesg = nil, &block) ⇒ Object

Catches any thrown :contract exception raised within the given block, appends the given message to the violation message, and re-raises the exception.



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# File 'lib/handshake.rb', line 16

def Handshake.catch_contract(mesg=nil, &block) # :nodoc:
  violation = catch(:contract, &block)
  if violation.is_a?(Exception)
    # Re-raise the violation with the given message, ensuring that the
    # callback stack begins with the caller of this method rather than
    # this method.
    message = ( mesg.nil? ? "" : ( mesg + ": " ) ) + violation.message
    raise violation.class, message, caller
  end
end