Class: Dry::Logic::Rule::Interface
- Inherits:
-
Module
- Object
- Module
- Dry::Logic::Rule::Interface
- Defined in:
- lib/dry/logic/rule/interface.rb
Instance Attribute Summary collapse
-
#arity ⇒ Object
readonly
Returns the value of attribute arity.
-
#curried ⇒ Object
readonly
Returns the value of attribute curried.
Instance Method Summary collapse
- #constant? ⇒ Boolean
- #curried? ⇒ Boolean
- #curried_args ⇒ Object
- #define_constant_application ⇒ Object
- #define_constructor ⇒ Object
- #define_fixed_application ⇒ Object
- #define_splat_application ⇒ Object
-
#initialize(arity, curried) ⇒ Interface
constructor
A new instance of Interface.
- #name ⇒ Object
- #unapplied ⇒ Object
- #unapplied_args ⇒ Object
- #variable_arity? ⇒ Boolean
Constructor Details
#initialize(arity, curried) ⇒ Interface
Returns a new instance of Interface.
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# File 'lib/dry/logic/rule/interface.rb', line 11 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 variable_arity? define_splat_application elsif constant? define_constant_application else define_fixed_application end end |
Instance Attribute Details
#arity ⇒ Object (readonly)
Returns the value of attribute arity.
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# File 'lib/dry/logic/rule/interface.rb', line 7 def arity @arity end |
#curried ⇒ Object (readonly)
Returns the value of attribute curried.
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# File 'lib/dry/logic/rule/interface.rb', line 9 def curried @curried end |
Instance Method Details
#constant? ⇒ Boolean
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# File 'lib/dry/logic/rule/interface.rb', line 30 def constant? arity.zero? end |
#curried? ⇒ Boolean
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# File 'lib/dry/logic/rule/interface.rb', line 38 def curried? !curried.zero? end |
#curried_args ⇒ Object
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# File 'lib/dry/logic/rule/interface.rb', line 136 def curried_args @curried_args ||= ::Array.new(curried) { |i| "@arg#{i}" } end |
#define_constant_application ⇒ Object
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# File 'lib/dry/logic/rule/interface.rb', line 78 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 ⇒ Object
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# File 'lib/dry/logic/rule/interface.rb', line 61 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 |
#define_fixed_application ⇒ Object
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# File 'lib/dry/logic/rule/interface.rb', line 117 def define_fixed_application parameters = unapplied_args.join(', ') application = "@predicate[#{ (curried_args + unapplied_args).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_splat_application ⇒ Object
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# File 'lib/dry/logic/rule/interface.rb', line 94 def define_splat_application application = if curried? "@predicate[#{curried_args.join(', ')}, *input]" else '@predicate[*input]' end module_eval(<<~RUBY, __FILE__, __LINE__ + 1) def call(*input) if #{application} Result::SUCCESS else Result.new(false, id) { ast(*input) } end end def [](*input) #{application} end RUBY end |
#name ⇒ Object
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# File 'lib/dry/logic/rule/interface.rb', line 50 def name if constant? 'Constant' else arity_str = variable_arity? ? 'VariableArity' : "#{arity}Arity" curried_str = curried? ? "#{curried}Curried" : EMPTY_STRING "#{arity_str}#{curried_str}" end end |
#unapplied ⇒ Object
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# File 'lib/dry/logic/rule/interface.rb', line 42 def unapplied if variable_arity? -1 else arity - curried end end |
#unapplied_args ⇒ Object
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# File 'lib/dry/logic/rule/interface.rb', line 140 def unapplied_args @unapplied_args ||= ::Array.new(unapplied) { |i| "input#{i}" } end |
#variable_arity? ⇒ Boolean
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# File 'lib/dry/logic/rule/interface.rb', line 34 def variable_arity? arity.equal?(-1) end |