Class: Depager::DeclarationPartParser

Inherits:
Object
  • Object
show all
Includes:
Utils::CommonMethods
Defined in:
lib/depager.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Utils::CommonMethods

#error_exit, #error_message, #expanded_code_delimiter, #full_target_name, #input_path, #inspect, #warning

Instance Attribute Details

#file ⇒ Object (readonly)

Returns the value of attribute file.



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# File 'lib/depager.rb', line 23

def file
  @file
end

#g_parser ⇒ Object (readonly)

Returns the value of attribute g_parser.



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# File 'lib/depager.rb', line 23

def g_parser
  @g_parser
end

#generator ⇒ Object (readonly)

Returns the value of attribute generator.



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# File 'lib/depager.rb', line 23

def generator
  @generator
end

#target_name ⇒ Object (readonly)

Returns the value of attribute target_name.



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# File 'lib/depager.rb', line 23

def target_name
  @target_name
end

#target_namespace ⇒ Object (readonly)

Returns the value of attribute target_namespace.



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# File 'lib/depager.rb', line 23

def target_namespace
  @target_namespace
end

Instance Method Details

#parse(file) ⇒ Object 



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# File 'lib/depager.rb', line 25

def parse(file)
  @file = file
  @g_parser = GrammarPartParser.new(self)

  until file.eof?
    case file.gets
    when /^\s*(#.*)?$/
      # skip space and comment.
    when /^%class\s+(\S+)(\s+based_on\s+(\S+)(\s+\(\s*'(.+)'\s*\))?)?\s*$/
      @target_name = $1
      if $2
        require $5 if $5
        nesting = $3.split("::").tap { |it| it[-1] = "#{it[-1]}Generator" }
        generator_class = nesting.inject(Object) { |c, name| c.const_get(name) }
      else
        require "depager/lr"
        generator_class = LALR::ParserGenerator
      end

      if @target_name =~ /(.+)::([^:]+)/
        @target_namespace = $1
        @target_name = $2
      else
        error_exit "Namespace required"
      end

      @generator = generator_class.new(self)
      break
    when /^%defext\s+(\S+)\s*$/
      require "depager/lr"

      @target_namespace = $1
      @target_name = "Master"

      @generator = LALR::ExtensionGenerator.new(self)
      break
    else
      error_exit "%class not found."
    end
  end
  @generator.parse
end

#parsing_method ⇒ Object 



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# File 'lib/depager.rb', line 68

def parsing_method
  @generator.parsing_method
end