class Binding
Public Instance Methods
Returns the value of some variable.
a = 2 binding["a"] #=> 2
# File lib/core/facets/binding/op_get.rb, line 8 def []( x ) eval( x.to_s ) end
Set
the value of a local variable.
binding["a"] = 4 a #=> 4
@deprecated No longer wortks in Ruby 1.9+.
@see Binding#with
for an alternative.
# File lib/core/facets/binding/op_get.rb, line 20 def []=( l, v ) eval( "lambda {|v| #{l} = v}").call( v ) end
Return the directory of the file in which the binding was created.
# File lib/core/facets/binding/caller.rb, line 25 def __DIR__ File.dirname(self.__FILE__) end
Returns file name in which the binding was created.
# File lib/core/facets/binding/caller.rb, line 19 def __FILE__ Kernel.eval("__FILE__", self) end
Return the line number on which the binding was created.
# File lib/core/facets/binding/caller.rb, line 13 def __LINE__ Kernel.eval("__LINE__", self) end
Retreive the current running method.
# File lib/core/facets/binding/caller.rb, line 37 def __callee__ Kernel.eval("__callee__", self) end
Retreive the current running method.
# File lib/core/facets/binding/caller.rb, line 31 def __method__ Kernel.eval("__method__", self) end
Allows the evaluation of blocks by a Binding
in the same way that strings can be evaluated.
x = 5 $my_binding = binding class Test # just here to provide a scope gate $my_binding.block_exec { x } end # => 5
NOTE: The implementation of this method uses a method_missing trick.
Consequently it is a bit of a hack.
# File lib/standard/facets/binding/block_exec.rb, line 18 def block_exec(*args, &block) BlockEnvironment.new(self, *args, &block).call end
Returns the call stack, same format as Kernel#caller()
# File lib/core/facets/binding/caller.rb, line 7 def caller( skip=0 ) eval("caller(#{skip})") end
Returns the call stack, in array format.
# File lib/core/facets/kernel/callstack.rb, line 50 def callstack(level=1) eval( "callstack( #{level} )" ) end
Returns the nature of something within the context of the binding. Returns nil if that thing is not defined.
# File lib/core/facets/binding/defined.rb, line 5 def defined?(x) eval("defined? #{x}") end
Returns self of the binding’s context.
# File lib/core/facets/binding/self.rb, line 8 def self eval('self') end
Returns a new binding with local varaibles set.
CREDIT: Trans
# File lib/core/facets/binding/with.rb, line 7 def with(_local_variables, &_yields) eval("lambda{ |#{_local_variables.keys.join(',')},&yields| binding }").call(*_local_variables.values, &_yields) end