Class: Stupidedi::Parser::AbstractState

Inherits:
Object
  • Object
show all
Includes:
Inspect
Defined in:
lib/stupidedi/parser/states/abstract_state.rb

Constructors collapse

SegmentVal Construction collapse

Instruction Generation collapse

Instance Method Summary collapse

Methods included from Inspect

#inspect

Class Method Details

.lsequence(loop_defs, offset = 0) ⇒ Array<Instruction>

Builds a sequence of Instruction values that corresponds to the given sequence of loop_defs

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 229

def lsequence(loop_defs, offset = 0)
  instructions = []
  buffer       = []
  last         = nil

  loop_defs.each do |l|
    unless last.nil? or l.entry_segment_use.position == last.entry_segment_use.position
      drop_count =
        if buffer.length == 1 and not last.repeatable?
          offset
        else
          offset - buffer.length
        end

      buffer.each do |u|
        instructions << Instruction.new(nil, u, 0, drop_count, LoopState)
      end
      buffer.clear
    end

    buffer << l.entry_segment_use
    last    = l
    offset += 1
  end

  # Flush the buffer one last time
  unless buffer.nil?
    drop_count =
      if buffer.length == 1 and not last.repeatable?
        offset
      else
        offset - buffer.length
      end

    buffer.each do |u|
      instructions << Instruction.new(nil, u, 0, drop_count, LoopState)
    end
  end

  instructions
end

.mkcomposite(designator, composite_use, composite_tok) ⇒ Values::CompositeElementVal

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 117

def mkcomposite(designator, composite_use, composite_tok)
  composite_def  = composite_use.definition
  component_uses = composite_def.component_uses
  component_toks = composite_tok.component_toks

  position       = composite_tok.position
  component_vals = []
  component_idx  = "00"
  component_uses.zip(component_toks) do |component_use, component_tok|
    component_idx = component_idx.succ
    position = component_tok.position if component_tok

    component_vals <<
      if component_tok.nil?
        component_use.empty(position)
      else
        mksimple("#{designator}-#{component_idx}", component_use, component_tok)
      end
  end

  composite_use.value(component_vals, composite_tok.position)
end

.mkelement(designator, element_use, element_tok) ⇒ Values::SimpleElementVal, ...

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 84

def mkelement(designator, element_use, element_tok)
  if element_use.simple?
    if element_use.repeatable?
      element_toks = element_tok.element_toks
      element_vals = element_toks.map do |element_tok1|
        mksimple(designator, element_use, element_tok1)
      end

      mkrepeated(designator, element_use, element_vals)
    else
      mksimple(designator, element_use, element_tok)
    end
  else
    if element_use.repeatable?
      element_toks = element_tok.element_toks
      element_vals = element_toks.map do |element_tok1|
        mkcomposite(designator, element_use, element_tok1)
      end

      mkrepeated(designator, element_use, element_vals)
    else
      mkcomposite(designator, element_use, element_tok)
    end
  end
end

.mkrepeated(designator, element_use, element_vals) ⇒ Values::RepeatedElementVal

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 111

def mkrepeated(designator, element_use, element_vals)
  # @todo: Position
  Values::RepeatedElementVal.build(element_vals, element_use)
end

.mksegment(segment_tok, segment_use) ⇒ Values::SegmentVal

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 56

def mksegment(segment_tok, segment_use)
  segment_def  = segment_use.definition
  element_uses = segment_def.element_uses
  element_toks = segment_tok.element_toks

  position     = segment_tok.position
  element_vals = []
  element_idx  = "00"
  element_uses.zip(element_toks) do |element_use, element_tok|
    element_idx = element_idx.succ
    position = element_tok.position if element_tok

    element_vals <<
      if element_tok.nil?
        if element_use.repeatable?
          Values::RepeatedElementVal.empty(element_use)
        else
          element_use.empty(position)
        end
      else
        mkelement("#{segment_def.id}#{element_idx}", element_use, element_tok)
      end
  end

  segment_use.value(element_vals, segment_tok.position)
end

.mksimple(designator, element_use, element_tok) ⇒ Values::SimpleElementVal

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 141

def mksimple(designator, element_use, element_tok)
  # We don't validate that element_tok is simple because the TokenReader
  # will always produce a SimpleElementTok given a SimpleElementUse from
  # the SegmentDef. On the other hand, the BuilderDsl API will throw an
  # exception if the programmer constructs the wrong kind of element
  # according to the SegmentDef.

  if element_tok.value == :default
    allowed_vals = element_use.allowed_values

    if element_use.requirement.forbidden?
      element_use.empty(element_tok.position)
    elsif allowed_vals.empty?
      element_use.empty(element_tok.position)
    elsif allowed_vals.size == 1
      element_use.value(allowed_vals.first, element_tok.position)
    else
      raise Exceptions::ParseError,
        "#{designator} cannot be inferred"
    end
  elsif element_tok.value == :not_used
    if element_use.requirement.forbidden?
      element_use.empty(element_tok.position)
    else
      raise Exceptions::ParseError,
        "#{designator} is not forbidden"
    end
  elsif element_tok.value == :blank
    element_use.empty(element_tok.position)
  else
    element_use.value(element_tok.value, element_tok.position)
  end
end

.push(zipper, parent, segment_tok, segment_use, config) ⇒ Zipper::AbstractCursor

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 50

abstract :push, :args => %w(zipper parent segment_tok segment_use config)

.sequence(segment_uses, offset = 0) ⇒ Array<Instruction>

Builds a sequence of Instruction values that corresponds to the given sequence of segment_uses

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 182

def sequence(segment_uses, offset = 0)
  instructions = []
  buffer       = []
  last         = nil

  segment_uses.each do |s|
    unless last.nil? or s.position == last.position
      drop_count =
        if buffer.length == 1 and not last.repeatable?
          offset
        else
          offset - buffer.length
        end

      buffer.each do |u|
        instructions << Instruction.new(nil, u, 0, drop_count, nil)
      end

      buffer.clear
    end

    buffer << s
    last    = s
    offset += 1
  end

  # Flush the buffer one last time
  unless buffer.empty?
    drop_count =
      if buffer.length == 1 and not last.repeatable?
        offset
      else
        offset - buffer.length
      end

    buffer.each do |u|
      instructions << Instruction.new(nil, u, 0, drop_count, nil)
    end
  end

  instructions
end

.tsequence(table_defs, offset = 0) ⇒ Array<Instruction>

Builds a sequence of Instruction values that corresponds to the given sequence of table_defs

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 275

def tsequence(table_defs, offset = 0)
  instructions = []
  buffer       = []
  last         = nil

  table_defs.each do |t|
    unless last.nil? or t.position == last.position
      drop_count =
        if buffer.length == 1 and not last.repeatable?
          offset
        else
          offset - buffer.inject(0){|n,b| n + b.entry_segment_uses.length }
        end

      buffer.each do |b|
        b.entry_segment_uses.each do |u|
          instructions << Instruction.new(nil, u, 0, drop_count, TableState)
        end
      end

      buffer.clear
    end

    last    = t
    offset += t.entry_segment_uses.length
    buffer << t
  end

  unless buffer.empty?
    drop_count =
      if buffer.length == 1 and not last.repeatable?
        offset
      else
        offset - buffer.inject(0){|n,b| n + b.entry_segment_uses.length }
      end

    buffer.each do |b|
      b.entry_segment_uses.each do |u|
        instructions << Instruction.new(nil, u, 0, drop_count, TableState)
      end
    end
  end

  instructions
end

Instance Method Details

#children ⇒ Array<AbstractState>

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 19

abstract :children

#instructions ⇒ InstructionTable

Returns:



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

abstract :instructions

#leaf? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 24

def leaf?
  false
end

#pretty_print(q)

This method returns an undefined value.



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 29

def pretty_print(q)
  q.text self.class.name.split("::").last
  q.group(2, "(", ")") do
    q.breakable ""

    children.each do |e|
      unless q.current_group.first?
        q.text ","
        q.breakable
      end
      q.pp e
    end
  end
end

#segment_dict ⇒ Reader::SegmentDict

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 13

abstract :segment_dict

#separators ⇒ Reader::Separators

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 10

abstract :separators

#zipper ⇒ Zipper::AbstractCursor<Values::SegmentVal>

Returns:



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# File 'lib/stupidedi/parser/states/abstract_state.rb', line 16

abstract :zipper