Class: NCPP::NCPPFileInterpreter

Inherits:
Interpreter show all
Defined in:
lib/ncpp/interpreter.rb

Instance Method Summary collapse

Methods inherited from Interpreter

#call, #commands, #def_command, #def_variable, #eval_expr, #eval_str, #get_binding, #get_cacheable_cache, #get_command, #get_new_commands, #get_new_variables, #get_variable, #node_impure?, #unknown_command_error, #unknown_variable_error, #variables

Constructor Details

#initialize(cmd_prefix = COMMAND_PREFIX, extra_cmds = {}, extra_vars = {}, safe: false, puritan: false, no_cache: false, cmd_cache: {}) ⇒ NCPPFileInterpreter

Returns a new instance of NCPPFileInterpreter.



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# File 'lib/ncpp/interpreter.rb', line 848

def initialize(cmd_prefix = COMMAND_PREFIX, extra_cmds = {}, extra_vars = {}, safe: false, puritan: false,
               no_cache: false, cmd_cache: {})
  super(cmd_prefix, extra_cmds, extra_vars, safe: safe, puritan: puritan, no_cache: no_cache, cmd_cache: cmd_cache)

  @running = true

  @exit_code = 0

  @commands.merge!({
    write: ->(x, filename)  {
      File.open(filename, "w") do |file|
        @out_stack << x unless x.nil?
        file.write(@out_stack.join("\n"))
        @out_stack.clear
        nil
      end
    }.impure
      .describe(
      "Writes the contents of the out-stack and the given argument to the file specified. " \
      "This command is unique to the REPL interpreter."
    ),

    read: ->(filename) {
      raise "File not found: #{filename}" unless File.exist? filename
      File.read(filename)
    }.returns(String).impure
      .describe('Reads the file given and returns its contents as a String.'),

    read_lines: ->(filename) {
      raise "File not found: #{filename}" unless File.exist? filename
      File.readlines(filename)
    }.returns(Array).impure
      .describe('Reads the file specified and returns an Array containing each line.'),

    read_bytes: ->(filename) {
      raise "File not found: #{filename}" unless File.exist? filename
      File.binread(filename).bytes
    }.returns(Array).impure
      .describe('Reads the file specified and returns an Array containing each byte.'),

     exit: ->(exit_code = 0) { @exit_code = exit_code; @running = false }.impure
      .describe('Exits the program.')
  })

end

Instance Method Details

#run(ncpp_file, debug: false) ⇒ Object 



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# File 'lib/ncpp/interpreter.rb', line 894

def run(ncpp_file, debug: false)
  File.readlines(ncpp_file).each do |line|
    begin
      line = line.strip
      next if line.empty? || line.start_with?('//')

      eval_str(line)

      break unless @running

    rescue Parslet::ParseFailed => e
      puts 'ERROR'.underline_red + ": #{e.parse_failure_cause.ascii_tree}".red
      @exit_code = 1
      break
    rescue Exception => e
      puts 'ERROR'.underline_red + ": #{debug ? e.detailed_message : e.to_s}".red
      @exit_code = 1
      break
    end
  end

  @exit_code
end