JezK
Edit File: parse.rb
# frozen_string_literal: true module Byebug module Helpers # # Utilities to assist command parsing # module ParseHelper # # Parses +str+ of command +cmd+ as an integer between +min+ and +max+. # # If either +min+ or +max+ is nil, that value has no bound. # # @todo Remove the `cmd` parameter. It has nothing to do with the method's # purpose. # def get_int(str, cmd, min = nil, max = nil) return nil, pr("parse.errors.int.not_number", cmd: cmd, str: str) unless /\A-?[0-9]+\z/.match?(str) int = str.to_i if min && int < min err = pr("parse.errors.int.too_low", cmd: cmd, str: str, min: min) return nil, err elsif max && int > max err = pr("parse.errors.int.too_high", cmd: cmd, str: str, max: max) return nil, err end int end # # @return true if code is syntactically correct for Ruby, false otherwise # def syntax_valid?(code) return true unless code without_stderr do begin RubyVM::InstructionSequence.compile(code) true rescue SyntaxError false end end end # # @return +str+ as an integer or 1 if +str+ is empty. # def parse_steps(str, cmd) return 1 unless str steps, err = get_int(str, cmd, 1) return nil, err unless steps steps end private # # Temporarily disable output to $stderr # def without_stderr old_stderr = $stderr $stderr = StringIO.new yield ensure $stderr = old_stderr end end end end