54 lines
1.1 KiB
Ruby
Executable file
54 lines
1.1 KiB
Ruby
Executable file
#!/usr/bin/env ruby
|
|
# frozen_string_literal: true
|
|
|
|
require 'readline'
|
|
|
|
require 'rpl'
|
|
|
|
class RplRepl
|
|
def initialize( interpreter )
|
|
interpreter ||= Rpl.new
|
|
@interpreter = interpreter
|
|
end
|
|
|
|
def run
|
|
print_stack unless @interpreter.stack.empty?
|
|
|
|
Readline.completion_proc = proc do |s|
|
|
( @interpreter.dictionary.words.keys + @interpreter.dictionary.vars.keys ).grep(/^#{Regexp.escape(s)}/)
|
|
end
|
|
Readline.completion_append_character = ' '
|
|
|
|
loop do
|
|
input = Readline.readline( ' ', true )
|
|
break if input.nil? || input == 'quit'
|
|
|
|
pp Readline::HISTORY if input == 'history'
|
|
|
|
# Remove blank lines from history
|
|
Readline::HISTORY.pop if input.empty?
|
|
|
|
begin
|
|
@interpreter.run( input )
|
|
rescue ArgumentError => e
|
|
p e
|
|
end
|
|
|
|
print_stack
|
|
end
|
|
end
|
|
|
|
def format_element( elt )
|
|
@interpreter.stringify( elt )
|
|
end
|
|
|
|
def print_stack
|
|
stack_size = @interpreter.stack.size
|
|
|
|
@interpreter.stack.each_with_index do |elt, i|
|
|
puts "#{stack_size - i}: #{format_element( elt )}"
|
|
end
|
|
end
|
|
end
|
|
|
|
RplRepl.new.run
|