Module: IRB::MethodExtender
Relationships & Source Files | |
Defined in: | lib/irb/extend-command.rb |
Overview
A convenience module for extending Ruby methods.
Instance Method Summary
-
#def_post_proc(base_method, extend_method)
Extends the given
base_method
with a postfix call to the givenextend_method
. -
#def_pre_proc(base_method, extend_method)
Extends the given
base_method
with a prefix call to the givenextend_method
. -
#new_alias_name(name, prefix = "__alias_of__", postfix = "__")
Returns a unique method name to use as an alias for the given
name
.
Instance Method Details
#def_post_proc(base_method, extend_method)
Extends the given base_method
with a postfix call to the given extend_method
.
# File 'lib/irb/extend-command.rb', line 275
def def_post_proc(base_method, extend_method) base_method = base_method.to_s extend_method = extend_method.to_s alias_name = new_alias_name(base_method) module_eval %[ alias_method alias_name, base_method def #{base_method}(*opts) send :#{alias_name}, *opts send :#{extend_method}, *opts end ] end
#def_pre_proc(base_method, extend_method)
Extends the given base_method
with a prefix call to the given extend_method
.
# File 'lib/irb/extend-command.rb', line 259
def def_pre_proc(base_method, extend_method) base_method = base_method.to_s extend_method = extend_method.to_s alias_name = new_alias_name(base_method) module_eval %[ alias_method alias_name, base_method def #{base_method}(*opts) send :#{extend_method}, *opts send :#{alias_name}, *opts end ] end
#new_alias_name(name, prefix = "__alias_of__", postfix = "__")
Returns a unique method name to use as an alias for the given name
.
Usually returns #{prefix}#{name}#{postfix}<num>
, example:
new_alias_name('foo') #=> __alias_of__foo__
def ; end
new_alias_name('bar') #=> __alias_of__bar__2
# File 'lib/irb/extend-command.rb', line 296
def new_alias_name(name, prefix = "__alias_of__", postfix = "__") base_name = "#{prefix}#{name}#{postfix}" all_methods = instance_methods(true) + private_instance_methods(true) same_methods = all_methods.grep(/^#{Regexp.quote(base_name)}[0-9]*$/) return base_name if same_methods.empty? no = same_methods.size while !same_methods.include?(alias_name = base_name + no) no += 1 end alias_name end