Module: Utils::Xt::SourceLocationExtension

Includes:
Tins::DeepConstGet
Included in:
Object
Defined in:
lib/utils/xt/source_location_extension.rb

Constant Summary collapse

CLASS_METHOD_REGEXP =
/\A([A-Z][\w:]+)([#.])([\w!?]+)/
FILE_LINENUMBER_REGEXP =
/\A\s*([^:]+):(\d+)-?(\d+)?/

Instance Method Summary collapse

Instance Method Details

#source_locationObject


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# File 'lib/utils/xt/source_location_extension.rb', line 12

def source_location
  filename   = nil
  linenumber = nil
  rangeend   = nil
  if respond_to?(:to_str)
    string = to_str
    case
    when string =~ FILE_LINENUMBER_REGEXP && File.exist?($1)
      filename   = $1
      linenumber = $2.to_i
      rangeend   = $3&.to_i
    when string =~ CLASS_METHOD_REGEXP && !File.exist?(string)
      klassname   = $1
      method_kind = $2 == '#' ? :instance_method : :method
      methodname  = $3
      filename, linenumber =
        deep_const_get(klassname).__send__(method_kind, methodname).source_location
    else
      filename = string
    end
  else
    filename = to_s
  end
  array = linenumber ? [ filename, linenumber ] : [ filename, 1 ]
  array_singleton_class = class << array; self; end
  array_singleton_class.instance_eval do
    define_method(:filename) { filename }
    define_method(:linenumber) { linenumber }
    define_method(:rangeend) { rangeend }
    define_method(:to_s) { [ filename, linenumber ].compact * ':' }
    define_method(:range) { rangeend ? "#{to_s}-#{rangeend}" : "#{to_s}" }
  end
  array
end