Class: Filigree::DestructuringPattern

Inherits:

MultipleObjectPattern

• Object
• BasicPattern
• MultipleObjectPattern
• Filigree::DestructuringPattern

Defined in:

lib/filigree/match.rb

Overview

A pattern that matches an instance of a class and destructures it so that the values contained by the object may be matched upon.

Instance Method Summary

• #initialize(klass, *pattern) ⇒ DestructuringPattern constructor

  Create a new destructuring pattern.

• #match?(object, env) ⇒ Boolean

  Test to see if the object is an instance of the appropriate class, and if so destructure it and test it’s values against the sub-pattern elements.

Methods included from AbstractClass

#abstract_method, extended, #install_icvars, #new

Methods inherited from BasicPattern

#as, #match_pattern_element

Constructor Details

#initialize(klass, *pattern) ⇒ DestructuringPattern

Create a new destructuring pattern.

Parameters:

• klass (Class) —

  Class to match instances of. It must be destructurable.

• pattern (Object) —

  Pattern elements to use in matching the object’s values

# File 'lib/filigree/match.rb', line 451

def initialize(klass, *pattern)
	@klass = klass
	super(pattern)
end

Instance Method Details

#match?(object, env) ⇒ Boolean

Test to see if the object is an instance of the appropriate class, and if so destructure it and test it’s values against the sub-pattern elements.

Parameters:

• object (Object) —

  Object to test pattern against

• env (Object) —

  Binding environment

Returns:

• (Boolean)

# File 'lib/filigree/match.rb', line 464

def match?(object, env)
	object.is_a?(@klass) and super(object.destructure(@pattern.length), env)
end