類別 IRB::SourceFinder
常數
- Source
公開類別方法
new(irb_context) 按一下以切換來源
# File lib/irb/source_finder.rb, line 15 def initialize(irb_context) @irb_context = irb_context end
公開實例方法
find_source(signature, super_level = 0) 按一下以切換來源
# File lib/irb/source_finder.rb, line 19 def find_source(signature, super_level = 0) context_binding = @irb_context.workspace.binding case signature when /\A[A-Z]\w*(::[A-Z]\w*)*\z/ # Const::Name eval(signature, context_binding) # trigger autoload base = context_binding.receiver.yield_self { |r| r.is_a?(Module) ? r : Object } file, line = base.const_source_location(signature) when /\A(?<owner>[A-Z]\w*(::[A-Z]\w*)*)#(?<method>[^ :.]+)\z/ # Class#method owner = eval(Regexp.last_match[:owner], context_binding) method = Regexp.last_match[:method] return unless owner.respond_to?(:instance_method) file, line = method_target(owner, super_level, method, "owner") when /\A((?<receiver>.+)(\.|::))?(?<method>[^ :.]+)\z/ # method, receiver.method, receiver::method receiver = eval(Regexp.last_match[:receiver] || 'self', context_binding) method = Regexp.last_match[:method] return unless receiver.respond_to?(method, true) file, line = method_target(receiver, super_level, method, "receiver") end if file && line && File.exist?(file) Source.new(file: file, first_line: line, last_line: find_end(file, line)) end end
私人實例方法
find_end(file, first_line) 按一下以切換來源
# File lib/irb/source_finder.rb, line 44 def find_end(file, first_line) lex = RubyLex.new lines = File.read(file).lines[(first_line - 1)..-1] tokens = RubyLex.ripper_lex_without_warning(lines.join) prev_tokens = [] # chunk with line number tokens.chunk { |tok| tok.pos[0] }.each do |lnum, chunk| code = lines[0..lnum].join prev_tokens.concat chunk continue = lex.should_continue?(prev_tokens) syntax = lex.check_code_syntax(code, local_variables: []) if !continue && syntax == :valid return first_line + lnum end end first_line end
method_target(owner_receiver, super_level, method, type) 按一下以切換來源
# File lib/irb/source_finder.rb, line 63 def method_target(owner_receiver, super_level, method, type) case type when "owner" target_method = owner_receiver.instance_method(method) when "receiver" target_method = owner_receiver.method(method) end super_level.times do |s| target_method = target_method.super_method if target_method end target_method.nil? ? nil : target_method.source_location rescue NameError nil end