Class: PatternMatch::MatchingStateStream

Inherits:
Object
  • Object
show all
Defined in:
lib/egison/core.rb

Instance Method Summary collapse

Constructor Details

#initialize(pat, tgt) ⇒ MatchingStateStream

Returns a new instance of MatchingStateStream.



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# File 'lib/egison/core.rb', line 51

def initialize(pat, tgt)
  @state = MatchingState.new(pat, tgt)
  @processes = []
end

Instance Method Details

#match(&block) ⇒ Object 



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# File 'lib/egison/core.rb', line 56

def match(&block)
  @processes << Egison::LazyArray.new(@state.process_stream)
  until @processes.empty?
    process(@processes.shift, &block)
  end
end

#process(process_iter, &block) ⇒ Object 



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# File 'lib/egison/core.rb', line 63

def process(process_iter, &block)
  unless process_iter.empty?
    ret = process_iter.shift
    if ret.atoms.empty?
      block.(ret.bindings)
    else
      @processes << Egison::LazyArray.new(ret.process_stream)
    end
    @processes << process_iter
  end
end