Class: Flor::Pro::Range

Inherits:
Flor::Procedure show all
Defined in:
lib/flor/pcore/range.rb

Constant Summary

Constants inherited from Flor::Procedure

Flor::Procedure::RVARS, Flor::Procedure::TRUE_ATTS

Instance Attribute Summary

Attributes inherited from Node

#message

Instance Method Summary collapse

Methods inherited from Flor::Procedure

[], core?, #debug_msg, #debug_tree, #end, #flank, #heap, inherited, make, names, #prepare_on_receive_last, #trigger_on_error

Methods inherited from Node

#child_id, #cnodes, #cnodes_any?, #cnodes_empty?, #deref, #descendant_of?, #domain, #exid, #fei, #from, #h, #initialize, #lookup_tree, #lookup_value, #message_or_node_payload, #nid, #node_closed?, #node_ended?, #node_open?, #node_payload, #node_payload_ret, #node_status, #node_status_flavour, #on_error_parent, #parent, #payload, #payload_ret, #point, #reheap, #to_procedure_node, #tree

Constructor Details

This class inherits a constructor from Flor::Node

Instance Method Details

#pre_execute ⇒ Object 



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# File 'lib/flor/pcore/range.rb', line 29

def pre_execute

  @node['rets'] = []
  @node['atts'] = []

  unatt_unkeyed_children
end

#receive_last ⇒ Object 



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# File 'lib/flor/pcore/range.rb', line 37

def receive_last

  rets = @node['rets'].select { |r| r.is_a?(Numeric) }.collect(&:to_i)

  sta = rets[1] ? rets[0] : 0
  edn = rets[1] || rets[0] || 0
  ste = rets[2] || ((sta > edn) ? -1 : 1)

  asta = att('start', 'from')
  aedn = att('end', 'to')
  aste = att('step', 'by', 'inc')

  sta = asta if asta
  edn = aedn if aedn
  ste = aste if aste

  fail Flor::FlorError.new("#{heap} step is 0", self) \
    if ste == 0

  #payload['ret'] = (sta..edn - 1).step(ste).to_a
    # doesn't accept negative steps

  payload['ret'] = []
  cur = sta
    #
  loop do
    break if (ste < 0) ? (cur <= edn) : (cur >= edn)
    payload['ret'] << cur
    cur = cur + ste
  end

  super
end