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module MethodSource
module SourceLocation
module MethodExtensions
if defined?(RUBY_ENGINE) && RUBY_ENGINE =~ /jruby/
require 'java'
# JRuby version source_location hack
# @return [Array] A two element array containing the source location of the method
def source_location
to_java.source_location(Thread.current.to_java.getContext())
end
else
def trace_func(event, file, line, id, binding, classname)
return unless event == 'call'
set_trace_func nil
@file, @line = file, line
raise :found
end
private :trace_func
# Return the source location of a method for Ruby 1.8.
# @return [Array] A two element array. First element is the
# file, second element is the line in the file where the
# method definition is found.
def source_location
if @file.nil?
args =[*(1..(arity<-1 ? -arity-1 : arity ))]
set_trace_func method(:trace_func).to_proc
call(*args) rescue nil
set_trace_func nil
@file = File.expand_path(@file) if @file && File.exist?(File.expand_path(@file))
end
return [@file, @line] if File.exist?(@file.to_s)
end
end
end
module ProcExtensions
if defined?(RUBY_ENGINE) && RUBY_ENGINE =~ /rbx/
# Return the source location for a Proc (Rubinius only)
# @return [Array] A two element array. First element is the
# file, second element is the line in the file where the
# proc definition is found.
def source_location
[block.file.to_s, block.line]
end
else
# Return the source location for a Proc (in implementations
# without Proc#source_location)
# @return [Array] A two element array. First element is the
# file, second element is the line in the file where the
# proc definition is found.
def source_location
self.to_s =~ /@(.*):(\d+)/
[$1, $2.to_i]
end
end
end
module UnboundMethodExtensions
if defined?(RUBY_ENGINE) && RUBY_ENGINE =~ /jruby/
require 'java'
# JRuby version source_location hack
# @return [Array] A two element array containing the source location of the method
def source_location
to_java.source_location(Thread.current.to_java.getContext())
end
else
# Return the source location of an instance method for Ruby 1.8.
# @return [Array] A two element array. First element is the
# file, second element is the line in the file where the
# method definition is found.
def source_location
klass = case owner
when Class
owner
when Module
method_owner = owner
Class.new { include(method_owner) }
end
# deal with immediate values
case
when klass == Symbol
return :a.method(name).source_location
when klass == Fixnum
return 0.method(name).source_location
when klass == TrueClass
return true.method(name).source_location
when klass == FalseClass
return false.method(name).source_location
when klass == NilClass
return nil.method(name).source_location
end
begin
klass.allocate.method(name).source_location
rescue TypeError
# Assume we are dealing with a Singleton Class:
# 1. Get the instance object
# 2. Forward the source_location lookup to the instance
instance ||= ObjectSpace.each_object(owner).first
instance.method(name).source_location
end
end
end
end
end
end
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