88 lines
1.9 KiB
Ruby
Executable file
88 lines
1.9 KiB
Ruby
Executable file
#!/usr/bin/env ruby
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# frozen_string_literal: true
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require 'English'
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require 'optparse'
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require 'readline'
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require 'rpl'
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class RplRepl
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def initialize( interpreter )
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interpreter ||= Rpl.new
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@interpreter = interpreter
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end
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def run
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print_stack unless @interpreter.stack.empty?
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Readline.completion_proc = proc do |s|
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( @interpreter.dictionary.words.keys + @interpreter.dictionary.vars.keys ).grep(/^#{Regexp.escape(s)}/)
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end
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Readline.completion_append_character = ' '
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loop do
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input = Readline.readline( ' ', true )
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break if input.nil? || input == 'quit'
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pp Readline::HISTORY if input == 'history'
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# Remove blank lines from history
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Readline::HISTORY.pop if input.empty?
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begin
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@interpreter.run( input )
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rescue ArgumentError => e
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pp e
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end
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print_stack
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end
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end
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def print_stack
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stack_size = @interpreter.stack.size
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@interpreter.stack.each_with_index do |elt, i|
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puts "#{stack_size - i}: #{elt}"
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end
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end
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end
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options = { run_REPL: ARGV.empty?,
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files: [],
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programs: [] }
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OptionParser.new do |opts|
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opts.on('-c', '--code "program"', ' ') do |program|
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options[:programs] << program
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end
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opts.on('-f', '--file program.rpl', 'load program.rpl') do |filename|
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options[:files] << filename
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end
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opts.on('-i', '--interactive', 'launch interactive REPL') do
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options[:run_REPL] = true
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end
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end.parse!
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# Instantiate interpreter
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interpreter = Rpl.new
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# first run provided files if any
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options[:files].each do |filename|
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interpreter.run "\"#{filename}\" feval"
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end
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# second run provided code if any
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options[:programs].each do |program|
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interpreter.run program
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end
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# third launch REPL if (explicitely or implicitely) asked
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RplRepl.new( interpreter ).run if options[:run_REPL]
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# last print resulting stack on exit (formatted so that it can be fed back later to interpreter)
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pp interpreter.export_stack
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