Class: CLI::Kit::Args::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/cli/kit/args/parser.rb,
lib/cli/kit/args/parser/node.rb

Defined Under Namespace

Classes: InvalidOptionError, Node, OptionRequiresAnArgumentError

Constant Summary collapse

Error = 
Class.new(Args::Error)

Instance Method Summary collapse

Constructor Details

#initialize(definition) ⇒ Parser

: (Definition definition) -> void



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# File 'lib/cli/kit/args/parser.rb', line 63

def initialize(definition)
  @defn = definition
end

Instance Method Details

#parse(tokens) ⇒ Object

: (Array tokens) -> Array



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# File 'lib/cli/kit/args/parser.rb', line 28

def parse(tokens)
  nodes = [] #: Array[Node]
  args = tokens #: Array[Tokenizer::Token?]
  args << nil # to make each_cons pass (args.last, nil) on the final round.
  state = :init
  # TODO: test that "--height -- 3" is parsed correctly.
  args.each_cons(2) do |(arg, next_arg)|
    case state
    when :skip
      state = :init
    when :init
      state, val = parse_token(
        arg, #: as !nil
        next_arg,
      )
      nodes << val
    when :unparsed
      unless arg.is_a?(Tokenizer::Token::UnparsedArgument)
        raise(Error, 'bug: non-unparsed argument after unparsed argument')
      end

      unparsed = nodes.last
      unless unparsed.is_a?(Node::Unparsed)
        # :nocov: not actually possible, in theory
        raise(Error, 'bug: parser failed to recognize first unparsed argument')
        # :nocov:
      end

      unparsed.value << arg.value
    end
  end
  nodes
end