Module: Factbase::Term::Aliases

Included in:
Factbase::Term
Defined in:
lib/factbase/terms/aliases.rb

Overview

Aliases terms.

Author

Yegor Bugayenko ([email protected])

Copyright

Copyright © 2024 Yegor Bugayenko

License

MIT

Instance Method Summary collapse

Instance Method Details

#as(fact, maps) ⇒ Object 



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# File 'lib/factbase/terms/aliases.rb', line 31

def as(fact, maps)
  assert_args(2)
  a = @operands[0]
  raise "A symbol expected as first argument of 'as'" unless a.is_a?(Symbol)
  vv = the_values(1, fact, maps)
  vv&.each { |v| fact.send("#{a}=", v) }
  true
end

#join(fact, maps) ⇒ Object 



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# File 'lib/factbase/terms/aliases.rb', line 40

def join(fact, maps)
  assert_args(2)
  mask = @operands[0]
  raise "A string expected as first argument of 'join'" unless mask.is_a?(String)
  term = @operands[1]
  raise "A term expected, but '#{term}' provided" unless term.is_a?(Factbase::Term)
  subset = maps.select { |m| term.evaluate(Factbase::Tee.new(Factbase::Fact.new(Mutex.new, m), fact), maps) }
  subset.each do |m|
    m.each do |k, vv|
      vv.each do |v|
        fact.send("#{mask.gsub('*', k)}=", v)
      end
    end
  end
  true
end