Class: Flor::Pro::Arith

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

Constant Summary collapse

DEFAULTS = 
{ :+ => 0, :* => 1, :- => 0, :/ => 1 }

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/arith.rb', line 45

def pre_execute

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

  unatt_unkeyed_children
end

#receive_last ⇒ Object 



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# File 'lib/flor/pcore/arith.rb', line 53

def receive_last

  sign = tree.first.to_sym

  rets = @node['rets']
  rets << node_payload_ret \
    if rets.empty? && node_payload_ret.is_a?(Array)
  rets = rets[0] \
    if rets.size == 1 && rets[0].is_a?(Array)

  fail Flor::FlorError.new('modulo % requires at least 2 arguments', self) \
    if sign == :% && rets.size < 2

  if j = att('join')
    max = rets.size - 1
    rets = rets.each_with_index.inject([]) { |a, (e, i)|
      a << e
      a << j if i < max
      a }
    rets[0] = stringify(rets[0]) \
      if rets.any? && j.is_a?(String)
  end

  ret =
    if rets.compact.empty?
      DEFAULTS[sign]
    elsif sign == :+
      rets.reduce { |r, e|
        r + (r.is_a?(String) ? stringify(e) : e) }
    else
      rets = rets.collect(&:to_f) \
        if sign == :/ || rets.find { |r| r.is_a?(Float) }
      rets.reduce(&sign)
    end

  unless ret.is_a?(String)
    round = ret.round
    ret = round if round.to_f.to_s == ret.to_f.to_s
  end
    # follow JSON somehow, in show "1.0" as "1"...

  wrap_reply('ret' => ret)
end