Class: Dry::Schema::Macros::Maybe Private

Inherits:
DSL
  • Object
show all
Defined in:
lib/dry/schema/macros/maybe.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Macro used to specify predicates for a value that can be ‘nil`

Instance Attribute Summary

Attributes inherited from DSL

#chain, #predicate_inferrer, #primitive_inferrer

Instance Method Summary collapse

Methods inherited from DSL

#array, #custom_type?, #each, #filled, #hash, #maybe, #schema, #type, #value

Methods inherited from Core

#new, #operation, #path, #to_rule

Instance Method Details

#call(*args, **opts, &block) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/dry/schema/macros/maybe.rb', line 11

def call(*args, **opts, &block)
  if args.include?(:empty?)
    raise ::Dry::Schema::InvalidSchemaError, "Using maybe with empty? predicate is invalid"
  end

  if args.include?(:nil?)
    raise ::Dry::Schema::InvalidSchemaError, "Using maybe with nil? predicate is redundant"
  end

  append_macro(Macros::Value) do |macro|
    macro.call(*args, **opts, &block)
  end

  self
end

#to_ast ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/dry/schema/macros/maybe.rb', line 28

def to_ast
  [:implication,
   [
     [:not, [:predicate, [:nil?, [[:input, Undefined]]]]],
     trace.to_rule.to_ast
   ]]
end