class Dry::Logic::Rule::Interface
Constants
- SPLAT
Attributes
arity[R]
curried[R]
Public Class Methods
new(arity, curried)
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# File lib/dry/logic/rule/interface.rb, line 13 def initialize(arity, curried) @arity = arity @curried = curried if !variable_arity? && curried > arity raise ArgumentError, "wrong number of arguments (#{curried} for #{arity})" end define_constructor if curried? if constant? define_constant_application else define_application end end
Public Instance Methods
[](*)
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# File lib/dry/logic/rule/interface.rb, line 105 def [](*) @predicate[] end
call(*)
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# File lib/dry/logic/rule/interface.rb, line 97 def call(*) if @predicate[] Result::SUCCESS else Result.new(false, id) { ast } end end
constant?()
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# File lib/dry/logic/rule/interface.rb, line 30 def constant? arity.zero? end
curried?()
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# File lib/dry/logic/rule/interface.rb, line 38 def curried? !curried.zero? end
curried_args()
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# File lib/dry/logic/rule/interface.rb, line 131 def curried_args @curried_args ||= ::Array.new(curried) { |i| "@arg#{i}" } end
define_application()
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# File lib/dry/logic/rule/interface.rb, line 111 def define_application splat = variable_arity? ? SPLAT : EMPTY_ARRAY parameters = (unapplied_args + splat).join(", ") application = "@predicate[#{(curried_args + unapplied_args + splat).join(", ")}]" module_eval(<<~RUBY, __FILE__, __LINE__ + 1) def call(#{parameters}) if #{application} Result::SUCCESS else Result.new(false, id) { ast(#{parameters}) } end end def [](#{parameters}) #{application} end RUBY end
define_constant_application()
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# File lib/dry/logic/rule/interface.rb, line 95 def define_constant_application module_exec do def call(*) if @predicate[] Result::SUCCESS else Result.new(false, id) { ast } end end def [](*) @predicate[] end end end
define_constructor()
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# File lib/dry/logic/rule/interface.rb, line 78 def define_constructor assignment = if curried.equal?(1) "@arg0 = @args[0]" else "#{curried_args.join(", ")} = @args" end module_eval(<<~RUBY, __FILE__, __LINE__ + 1) def initialize(*) super #{assignment} end RUBY end
name()
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# File lib/dry/logic/rule/interface.rb, line 56 def name if constant? "Constant" else arity_str = if variable_arity? "Variable#{arity.abs - 1}Arity" else "#{arity}Arity" end curried_str = if curried? "#{curried}Curried" else EMPTY_STRING end "#{arity_str}#{curried_str}" end end
unapplied()
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# File lib/dry/logic/rule/interface.rb, line 42 def unapplied if variable_arity? unapplied = arity.abs - 1 - curried if unapplied.negative? 0 else unapplied end else arity - curried end end
unapplied_args()
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# File lib/dry/logic/rule/interface.rb, line 135 def unapplied_args @unapplied_args ||= ::Array.new(unapplied) { |i| "input#{i}" } end
variable_arity?()
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# File lib/dry/logic/rule/interface.rb, line 34 def variable_arity? arity.negative? end