Class: Dramatis::Runtime::Gate::Case

Inherits:
Object
  • Object
show all
Defined in:
lib/dramatis/runtime/gate.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Case

Returns a new instance of Case.



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# File 'lib/dramatis/runtime/gate.rb', line 142

def initialize
  @always = []
  @list = []
end

Instance Method Details

#_change(list, args, value, options = {}) ⇒ Object 



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# File 'lib/dramatis/runtime/gate.rb', line 33

def _change list, args, value, options = {}
  inplace = options[ :inplace ]
  tag = options[ :tag ]
  # pp ">> #{args and args.join(' ')} #{value} #{inplace} #{tag}", list
  prepend = true
  tbd = []
  list.each_with_index do |entry, list_index|
    vector, result, entry_tag = entry
    matches = true
    if tag and entry_tag != tag
      # p "#{tag} tag and #{entry_tag} dont' match"
      next
    end
    if args
      args.each_with_index do |arg, arg_index|
        # p "compare #{vector[arg_index]} #{arg}"
        if vector[arg_index] != arg
          # p "matches"
          matches = false
          break
        end
      end
    end
    if matches
      # p "matched"
      if inplace and value != nil
        # p "inplace"
        list[list_index][1] = value
        # FIX: tag?
        prepend = false
      else
        # p "schedule remove #{list[list_index].join(' ')} at #{list_index}"
        tbd << list_index
        # list[list_index,1] = []
      end
      # break
    end
  end
  tbd.reverse.each do |index|
    # p "remove #{index} #{list[index].join(' ')} at #{index}"
    list[index,1] = []
  end
  if prepend and value != nil
    list.unshift [ args, value, tag ]
  end
  # pp "<< #{args and args.join(' ')} #{value} #{inplace} #{tag}", list
end

#accept(*args) ⇒ Object

pp “<”, @list



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# File 'lib/dramatis/runtime/gate.rb', line 112

def accept *args
  change args, true, false
end

#accepts?(*args) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dramatis/runtime/gate.rb', line 120

def accepts? *args
  # p "accepts? #{args.join(" ")}"
  accepted = nil
  ( @always + @list ).each do |entry|
    vector, result = entry
    matches = true
    vector.each_with_index do |v, i|
      # warn "#{v} #{args[i]} => #{v === args[i]} so #{result}"
      if not( v === args[i] )
        matches = false
        break
      end
    end
    if matches
      accepted = result
      break
    end
  end
  # warn "last '#{accepted}'"
  # p "accepts? #{args.join(" ")} => '#{accepted}'"
  accepted == true
end

#always(args, value, options = {}) ⇒ Object 



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# File 'lib/dramatis/runtime/gate.rb', line 18

def always args, value, options = {}
  _change @always, Array( args ), value, options
end

#change(args, value, inplace) ⇒ Object

pp “<< #and args.join(‘ ’) #value #inplace #tag”, list



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# File 'lib/dramatis/runtime/gate.rb', line 80

def change args, value, inplace
  # pp "> #{args.join(' ')} #{value} #{inplace}", @list
  prepend = true
  @list.each_with_index do |entry, list_index|
    vector, result = entry
    matches = true
    args.each_with_index do |arg, arg_index|
      # p "compare #{vector[arg_index]} #{arg}"
      if vector[arg_index] != arg
        # p "matches"
        matches = false
        break
      end
    end
    if matches
      # p "matched"
      if inplace
        # p "inplace"
        @list[list_index][1] = value
        # FIX: tag?
        prepend = false
      else
        @list[list_index,1] = []
      end
      break
    end
  end
  if prepend
    @list.unshift [ args, value ]
  end
  # pp "<", @list
end

#default(args, options = {}) ⇒ Object 



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# File 'lib/dramatis/runtime/gate.rb', line 27

def default args, options = {}
  _change @list, args, nil, options
end

#default_by_tag(tag) ⇒ Object 



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# File 'lib/dramatis/runtime/gate.rb', line 30

def default_by_tag tag
  _change @list, nil, nil, { :tag => tag }
end

#list ⇒ Object 



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# File 'lib/dramatis/runtime/gate.rb', line 146

def list
  @list
end

#only(args, options = {}) ⇒ Object 



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# File 'lib/dramatis/runtime/gate.rb', line 21

def only args, options = {}
  _change @list, [ :object ], false, options
  _change @list, [ :continuation ], false, options
  _change @list, [ :continuation, Object, :exception ], true, options
  _change @list, Array( args ), true, options
end

#refuse(*args) ⇒ Object 



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# File 'lib/dramatis/runtime/gate.rb', line 115

def refuse *args
  change args, false, false
end

#update(value, *args) ⇒ Object 



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# File 'lib/dramatis/runtime/gate.rb', line 118

def update value, *args
end