Class: Gherkin::Parser::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/gherkin/parser/parser.rb

Defined Under Namespace

Classes: Machine

Instance Method Summary collapse

Constructor Details

#initialize(listener, raise_on_error = true, machine_name = 'root') ⇒ Parser

Initialize the parser. machine_name refers to a state machine table.



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# File 'lib/gherkin/parser/parser.rb', line 14

def initialize(listener, raise_on_error=true, machine_name='root')
  @listener = listener
  @raise_on_error = raise_on_error
  @machines = []
  @machine_name = machine_name
  push_machine(@machine_name)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args) ⇒ Object

Doesn’t yet fall back to super



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# File 'lib/gherkin/parser/parser.rb', line 23

def method_missing(method, *args)
  # TODO: Catch exception and call super
  if(event(method.to_s, args[-1]))
    @listener.send(method, *args)
  end
  if method == :eof
    pop_machine
    push_machine(@machine_name)
  end
end

Instance Method Details

#event(ev, line) ⇒ Object 



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# File 'lib/gherkin/parser/parser.rb', line 34

def event(ev, line)
  machine.event(ev, line) do |state, expected|
    if @raise_on_error
      raise ParseError.new(state, ev, expected, line)
    else
      @listener.syntax_error(state, ev, expected, line)
      return false
    end
  end
  true
end

#expected ⇒ Object 



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# File 'lib/gherkin/parser/parser.rb', line 58

def expected
  machine.expected
end

#force_state(state) ⇒ Object 



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# File 'lib/gherkin/parser/parser.rb', line 62

def force_state(state)
  machine.instance_variable_set('@state', state)
end

#machine ⇒ Object 



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# File 'lib/gherkin/parser/parser.rb', line 54

def machine
  @machines[-1]
end

#pop_machine ⇒ Object 



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# File 'lib/gherkin/parser/parser.rb', line 50

def pop_machine
  @machines.pop
end

#push_machine(name) ⇒ Object 



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# File 'lib/gherkin/parser/parser.rb', line 46

def push_machine(name)
  @machines.push(Machine.new(self, name))
end