Class: Pablo::Parser

Inherits:
Object
  • Object
show all
Includes:
Helpers
Defined in:
lib/pablo/parser.rb

Overview

Superclass for Command, Option, Token etc. Handles common initialization tasks and provides helpers.

Direct Known Subclasses

Command, Option, Token

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pablo, *args, &block) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/pablo/parser.rb', line 35

def initialize pablo, *args, &block
    # set names, opts
    @pablo, @toplevel, @block = pablo, pablo.toplevel?, block
    @opts = Hash.new
    @opts.merge!(args.delete_at(-1).to_hash) if args[-1].respond_to?(:to_hash)
    check_options()

    @file_methods =
        %w{file? directory? exists? exist? executable? readable? writable?}.
        collect(&:to_sym)
    @verify, args = args.partition { |x|
        [String, Array, Regexp, Proc, Fixnum, Range, Proc].include? x.class or @file_methods.include? x
    }

    [:position, :matches, :is].each do |sym|
        @verify << @opts.delete(sym) unless @opts[sym].nil?
    end

    @names = args
    check_names()

    # build expansion table
    names.each do |name|
        name = format(name)
        @pablo.expand << name unless @pablo.expand.include? name
    end if @pablo.expands?(klass_to_sym())

    # get desc, longdesc, usage
    @desc, @longdesc, @usage = @opts[:desc], @opts[:longdesc], @opts[:usage]
    %w{desc longdesc usage}.each { |sym| @opts.delete(sym.to_sym) }

    # register
    @pablo.registered << self
    # set default
    @names.each { |n| @pablo.send(klass_to_sym())[n] = @opts[:default] } unless @opts[:default].nil?
end

Instance Attribute Details

#desc ⇒ Object

Returns the value of attribute desc.



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# File 'lib/pablo/parser.rb', line 33

def desc
  @desc
end

#last_match ⇒ Object

Returns the value of attribute last_match.



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# File 'lib/pablo/parser.rb', line 33

def last_match
  @last_match
end

#longdesc ⇒ Object

Returns the value of attribute longdesc.



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# File 'lib/pablo/parser.rb', line 33

def longdesc
  @longdesc
end

#names ⇒ Object

Returns the value of attribute names.



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# File 'lib/pablo/parser.rb', line 33

def names
  @names
end

#usage ⇒ Object

Returns the value of attribute usage.



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# File 'lib/pablo/parser.rb', line 33

def usage
  @usage
end

Instance Method Details

#klass_to_sym ⇒ Object 



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# File 'lib/pablo/parser.rb', line 72

def klass_to_sym
    case self
    when Pablo::Command then :commands
    when Pablo::Option then :options
    when Pablo::Token then :tokens
    end
end