Class: PatternMatching::BindingsSet

Inherits:
Object
  • Object
show all
Defined in:
lib/pattern_matching/bindings_set.rb

Constant Summary collapse

REMOVABLE_OBJECT_METHODS =

For reasons I have yet to determine, implementing BindingsSet as a subclass of BasicObject has caused stack overflow issues. So the current workaround is to just remove everything we possibly can from this class at load time via the very hamfisted Module#undef_method.

[
  :nil?,
  :===,
  :=~,
  :!~,
  :eql?,
  :hash,
  :<=>,
  :class,
  :singleton_class,
  :clone,
  :dup,
  :taint,
  :tainted?,
  :untaint,
  :untrust,
  :untrusted?,
  :trust,
  :freeze,
  :frozen?,
  :to_s,
  :inspect,
  :methods,
  :singleton_methods,
  :protected_methods,
  :private_methods,
  :public_methods,
  :instance_variables,
  :instance_variable_get,
  :instance_variable_set,
  :instance_variable_defined?,
  :remove_instance_variable,
  :instance_of?,
  :kind_of?,
  :is_a?,
  :tap,
  :send,
  :public_send,
  :respond_to?,
  :extend,
  :display,
  :method,
  :public_method,
  :singleton_method,
  :define_singleton_method,
  :to_enum,
  :enum_for,
]

Instance Method Summary collapse

Constructor Details

#initialize ⇒ BindingsSet

Returns a new instance of BindingsSet.



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# File 'lib/pattern_matching/bindings_set.rb', line 63

def initialize
  @bindings = {}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(msg) ⇒ Object

Based on the caller’s method name (obviously not an universally-optimal choice), cache a Bindings object and forward all messages there.



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# File 'lib/pattern_matching/bindings_set.rb', line 70

def method_missing(msg, *)
  caller_label = caller_locations(1,1)[0].label
  @bindings[caller_label] ||= PatternMatching::Bindings.new
  @bindings[caller_label].send(msg)
end

Instance Method Details

#_clear_bindings!(caller_label) ⇒ Object

Used internally as a hacky hook into auto-bindings with the B constant, when enabled. See documentation for automatic bindings.



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# File 'lib/pattern_matching/bindings_set.rb', line 79

def _clear_bindings!(caller_label)
  @bindings.delete(caller_label)
end