Class: Kvn::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/kvn/parser.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(value) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/kvn/parser.rb', line 5

def initialize(value)
  @value = value.to_s.strip
  @lexer = Kvn::Lexer.new
  @value_lexer = Kvn::ValueLexer.new
end

Instance Attribute Details

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/kvn/parser.rb', line 3

def value
  @value
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/kvn/parser.rb', line 11

def parse
  output = lexer.lex(value)
  {}.tap do |parsed|
    begin
      key = nil
      key_found = false
      value_found = false
      while output.peek
        token = output.next
        if token.name == :KEY
          key = token.value
          key_found = true
          value_found = false
        end

        if token.name == :VALUE
          raise SyntaxError.new("Empty key detected for value! <#{token.value}>") unless key_found
          value_output = value_lexer.lex(token.value)
          parsed[key] = value_output.next.value
          value_found = true
          key_found = false
        end

        if token.name == :PAIRDELIM && !value_found
          raise SyntaxError.new("Empty value detected for key! <#{key}>")
        end
      end
    rescue StopIteration
    end
  end
end