Class: Stupidedi::Parser::InitialState

Inherits:
AbstractState show all
Defined in:
lib/stupidedi/parser/states/initial_state.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from AbstractState

#leaf?, lsequence, mkcomposite, mkelement, mkrepeated, mksegment, mksimple, #pretty_print, push, sequence, tsequence

Methods included from Inspect

#inspect

Constructor Details

#initialize(separators, segment_dict, instructions, zipper, children) ⇒ InitialState

Returns a new instance of InitialState.



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# File 'lib/stupidedi/parser/states/initial_state.rb', line 22

def initialize(separators, segment_dict, instructions, zipper, children)
  @separators, @segment_dict, @instructions, @zipper, @children =
    separators, segment_dict, instructions, zipper, children
end

Instance Attribute Details

#children ⇒ Array<AbstractState> (readonly)

Returns:



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# File 'lib/stupidedi/parser/states/initial_state.rb', line 20

def children
  @children
end

#instructions ⇒ InstructionTable (readonly)

Returns:



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# File 'lib/stupidedi/parser/states/initial_state.rb', line 14

def instructions
  @instructions
end

#segment_dict ⇒ Reader::SegmentDict (readonly)

Returns:



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# File 'lib/stupidedi/parser/states/initial_state.rb', line 11

def segment_dict
  @segment_dict
end

#separators ⇒ Reader::Separators (readonly)

Returns:



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# File 'lib/stupidedi/parser/states/initial_state.rb', line 8

def separators
  @separators
end

#zipper ⇒ Zipper::AbstractCursor (readonly)

Returns:



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# File 'lib/stupidedi/parser/states/initial_state.rb', line 17

def zipper
  @zipper
end

Class Method Details

.build(zipper) ⇒ InitialState

Returns:



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# File 'lib/stupidedi/parser/states/initial_state.rb', line 40

def build(zipper)
  new(
    Reader::Separators.empty,
    Reader::SegmentDict.empty,

    InstructionTable.build(
      # We initially accept only a single segment. When reading the "ISA"
      # segment, we push a new InterchangeState.
      Instruction.new(:ISA, nil, 0, 0, TransmissionState).cons),

    # Create a new parse tree with a Transmission as the root, and descend
    # to the placeholder where the first child node will be placed.
    zipper.build(Values::TransmissionVal.new),
    [])
end

.start(zipper) ⇒ Zipper::AbstractCursor

Returns:



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# File 'lib/stupidedi/parser/states/initial_state.rb', line 57

def start(zipper)
  zipper.build(build(zipper))
end

Instance Method Details

#copy(changes = {}) ⇒ InitialState

Returns:



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# File 'lib/stupidedi/parser/states/initial_state.rb', line 28

def copy(changes = {})
  InitialState.new \
    changes.fetch(:separators, @separators),
    changes.fetch(:segment_dict, @segment_dict),
    changes.fetch(:instructions, @instructions),
    changes.fetch(:zipper, @zipper),
    changes.fetch(:children, @children)
end