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Versions: 13
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Contents
module DynamicBinding
class LookupStack
def initialize(bindings = [])
@bindings = bindings
end
def method_missing(m, *args)
@bindings.reverse_each do |bind|
begin
method = eval("method(%s)" % m.inspect, bind)
rescue NameError
else
return method.call(*args)
end
begin
value = eval(m.to_s, bind)
return value
rescue NameError
end
end
raise NoMethodError, "No such variable or method: %s" % m
end
def pop_binding
@bindings.pop
end
def push_binding(bind)
@bindings.push bind
end
def push_instance(obj)
@bindings.push obj.instance_eval { binding }
end
def push_hash(vars)
push_instance Struct.new(*vars.keys).new(*vars.values)
end
def get_binding
instance_eval { binding }
end
def run_proc(p, *args)
instance_exec(*args, &p)
end
def push_method(name, p, obj=nil)
x = Object.new
singleton = class << x; self; end
singleton.send(:define_method, name, lambda { |*args|
obj.instance_exec(*args, &p)
})
push_instance x
end
end
end
class Proc
def call_with_binding(bind, *args)
::DynamicBinding::LookupStack.new([bind]).run_proc(self, *args)
end
end
Version data entries
13 entries across 13 versions & 1 rubygems