JezK
Edit File: ruby_tools.rb
## # Collection of methods for writing parsers against RDoc::RubyLex and # RDoc::RubyToken module RDoc::Parser::RubyTools include RDoc::RubyToken ## # Adds a token listener +obj+, but you should probably use token_listener def add_token_listener(obj) @token_listeners ||= [] @token_listeners << obj end ## # Fetches the next token from the scanner def get_tk tk = nil if @tokens.empty? then tk = @scanner.token @read.push @scanner.get_readed puts "get_tk1 => #{tk.inspect}" if $TOKEN_DEBUG else @read.push @unget_read.shift tk = @tokens.shift puts "get_tk2 => #{tk.inspect}" if $TOKEN_DEBUG end tk = nil if TkEND_OF_SCRIPT === tk if TkSYMBEG === tk then set_token_position tk.line_no, tk.char_no case tk1 = get_tk when TkId, TkOp, TkSTRING, TkDSTRING, TkSTAR, TkAMPER then if tk1.respond_to?(:name) then tk = Token(TkSYMBOL).set_text(":" + tk1.name) else tk = Token(TkSYMBOL).set_text(":" + tk1.text) end # remove the identifier we just read (we're about to replace it with a # symbol) @token_listeners.each do |obj| obj.pop_token end if @token_listeners else tk = tk1 end end # inform any listeners of our shiny new token @token_listeners.each do |obj| obj.add_token(tk) end if @token_listeners tk end ## # Reads and returns all tokens up to one of +tokens+. Leaves the matched # token in the token list. def get_tk_until(*tokens) read = [] loop do tk = get_tk case tk when *tokens then unget_tk tk; break end read << tk end read end ## # Retrieves a String representation of the read tokens def get_tkread read = @read.join("") @read = [] read end ## # Peek equivalent for get_tkread def peek_read @read.join('') end ## # Peek at the next token, but don't remove it from the stream def peek_tk unget_tk(tk = get_tk) tk end ## # Removes the token listener +obj+ def remove_token_listener(obj) @token_listeners.delete(obj) end ## # Resets the tools def reset @read = [] @tokens = [] @unget_read = [] @nest = 0 end ## # Skips whitespace tokens including newlines if +skip_nl+ is true def skip_tkspace(skip_nl = true) # HACK dup tokens = [] while TkSPACE === (tk = get_tk) or (skip_nl and TkNL === tk) do tokens.push tk end unget_tk tk tokens end ## # Has +obj+ listen to tokens def token_listener(obj) add_token_listener obj yield ensure remove_token_listener obj end ## # Returns +tk+ to the scanner def unget_tk(tk) @tokens.unshift tk @unget_read.unshift @read.pop # Remove this token from any listeners @token_listeners.each do |obj| obj.pop_token end if @token_listeners nil end end