Class: Pione::Command::PioneLangInteractiveContext

Inherits:
Rootage::CommandContext show all
Defined in:
lib/pione/command/pione-lang-interactive.rb

Instance Attribute Summary

Attributes inherited from Rootage::ProcessContext

#model, #scenario

Instance Method Summary collapse

Methods inherited from Rootage::CommandContext

#quit, #stop

Methods inherited from Rootage::ProcessContext

#fail, #initialize, make, #test

Constructor Details

This class inherits a constructor from Rootage::ProcessContext

Instance Method Details

Print parsing result of the string.



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# File 'lib/pione/command/pione-lang-interactive.rb', line 119

def print_result(parser, str)
  begin
    stree = parser.parse(str)
    transformer_option = {}
    transformer_option[:package_name] = model[:package_name] || "PioneSyntaxChecker"
    transformer_option[:filename] = model[:filename] || "NoFile"
    model = Lang::DocumentTransformer.new.apply(stree, transformer_option)
    if model.kind_of?(Array)
      model.each {|m| p m}
    else
      p model.eval(Lang::Environment.new)
    end
  rescue Lang::ParserError, Parslet::ParseFailed => e
    msg = "Pione syntax error: %s (%s)" % [e.message, e.class.name]
    puts(msg)
  rescue Lang::LangTypeError, Lang::BindingError => e
    msg = "Pione model error: %s (%s)" % [e.message, e.class.name]
    puts(msg)
  rescue Lang::MethodNotFound => e
    msg = "%s (%s)" % [e.message, e.class.name]
    puts(msg)
  end
end

#start_readline ⇒ Object 



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# File 'lib/pione/command/pione-lang-interactive.rb', line 89

def start_readline
  buf = ""
  mark = ">"

  # start loop
  while line = Readline.readline("#{mark} ".color(:red), true)
    buf += line
    if /[^\s]/.match(buf)
      # don't record if previous line is the same
      if Readline::HISTORY.size > 1 && Readline::HISTORY[-2] == buf
        Readline::HISTORY.pop
      end
      if buf[-1] == "\\"
        buf[-1] = "\n"
        mark = "+"
        next
      else
        # print parsing result
        print_result(Lang::DocumentParser.new.expr, buf)
        buf = ""
        mark = ">"
      end
    else
      # don't record if it is an empty line
      Readline::HISTORY.pop
    end
  end
end