Objects of class Binding encapsulate the execution context at some particular place in the code and retain this context for future use. The variables, methods, value of
self, and possibly an iterator block that can be accessed in this context are all retained. Binding objects can be created using
Kernel#binding, and are made available to the callback of
Kernel#set_trace_func and instances of TracePoint.
These binding objects can be passed as the second argument of the
Kernel#eval method, establishing an environment for the evaluation.
class Demo def initialize(n) @secret = n end def get_binding binding end end k1 = Demo.new(99) b1 = k1.get_binding k2 = Demo.new(-3) b2 = k2.get_binding eval("@secret", b1) #=> 99 eval("@secret", b2) #=> -3 eval("@secret") #=> nil
Binding objects have no class-specific methods.