class NScript::RangeNode

Public Class Methods

new(from, to, exclusive=false) click to toggle source
# File lib/nscript/parser/nodes.rb, line 384
def initialize(from, to, exclusive=false)
  @from, @to, @exclusive = from, to, exclusive
end

Public Instance Methods

compile_array(o) click to toggle source
# File lib/nscript/parser/nodes.rb, line 410
def compile_array(o)
  body = Expressions.wrap(LiteralNode.wrap('i'))
  arr  = Expressions.wrap(ForNode.new(body, {:source => ValueNode.new(self)}, Value.new('i')))
  ParentheticalNode.new(CallNode.new(CodeNode.new([], arr))).compile(o)
end
compile_node(o) click to toggle source
# File lib/nscript/parser/nodes.rb, line 399
def compile_node(o)
  return compile_array(o) unless o[:index]
  idx, step = o.delete(:index), o.delete(:step)
  vars      = "#{idx}=#{@from_var}"
  step      = step ? step.compile(o) : '1'
  equals    = @exclusive ? '' : '='
  compare   = "(#{@from_var} <= #{@to_var} ? #{idx} <#{equals} #{@to_var} : #{idx} >#{equals} #{@to_var})"
  incr      = "(#{@from_var} <= #{@to_var} ? #{idx} += #{step} : #{idx} -= #{step})"
  write("#{vars}; #{compare}; #{incr}")
end
compile_variables(o) click to toggle source
# File lib/nscript/parser/nodes.rb, line 392
def compile_variables(o)
  @indent = o[:indent]
  @from_var, @to_var = o[:scope].free_variable, o[:scope].free_variable
  from_val,  to_val  = @from.compile(o), @to.compile(o)
  write("#{@from_var} = #{from_val}; #{@to_var} = #{to_val};\n#{idt}")
end
exclusive?() click to toggle source
# File lib/nscript/parser/nodes.rb, line 388
def exclusive?
  @exclusive
end