Class: Lox::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/loxby/runner.rb

Overview

‘Lox::Runner` is the interactive runner which kickstarts the interpreter. An instance is created when loxby is initialized from the command line, though it can be instantiated from code as well.

Instance Method Summary collapse

Constructor Details

#initialize(out = $stdout, err = $stderr) ⇒ Runner

Returns a new instance of Runner.



14
15
16
17
18
19
20
21
22
23
24
 
# File 'lib/loxby/runner.rb', line 14

def initialize(out = $stdout, err = $stderr)
  # Exit cleanly. 130 is for interrupted scripts
  trap('INT') do
    puts
    exit Lox.config.exit_code.interrupt
  end

  @interpreter = Lox.new
  @out = out
  @err = err
end

Instance Method Details

#run(args) ⇒ Object 



26
27
28
29
30
31
32
33
34
35
 
# File 'lib/loxby/runner.rb', line 26

def run(args)
  if args.size > 1
    @out.puts 'Usage: loxby [script]'
    exit Lox.config.exit_code.usage
  elsif args.size == 1
    @interpreter.run_file args[0]
  else
    @interpreter.run_prompt # Run interactively
  end
end