Module: Pdfrb::Arlington::Predicate::Functions::LogicalPredicates

Defined in:
lib/pdfrb/arlington/predicate/functions/logical.rb

Overview

Logical predicates that don't fit Ruby's native && / || / ! dispatch: Eval (run a sub-expression), Not (alias for !).

Class Method Summary collapse

Class Method Details

.register_all ⇒ Object 



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# File 'lib/pdfrb/arlington/predicate/functions/logical.rb', line 12

def register_all
  Functions.register("Eval") do |args, _ctx|
    # Eval is special: its single argument is already
    # evaluated by the time we get it (because the Evaluator
    # walks args eagerly). So we just return the value as-is.
    args.first
  end

  Functions.register("Not") do |args, _ctx|
    !args.first
  end

  Functions.register("And") do |args, _ctx|
    args.all? { |a| a }
  end

  Functions.register("Or") do |args, _ctx|
    args.any? { |a| a }
  end
end