Class: ComponentEmbeddedRuby::Lexer

Inherits:
Object
  • Object
show all
Defined in:
lib/component_embedded_ruby/lexer.rb,
lib/component_embedded_ruby/lexer/input_reader.rb

Defined Under Namespace

Classes: InputReader, Position, Token

Instance Method Summary collapse

Constructor Details

#initialize(content) ⇒ Lexer

Returns a new instance of Lexer.



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# File 'lib/component_embedded_ruby/lexer.rb', line 8

def initialize(content)
  @reader = InputReader.new(content)

  @tokens = []
end

Instance Method Details

#lex ⇒ Object 



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# File 'lib/component_embedded_ruby/lexer.rb', line 14

def lex
  while !reader.eof?
    char = reader.current_char

    if char == "<"
      add_token(:open_carrot, "<")
      reader.next
    elsif char == ">"
      add_token(:close_carrot, ">")
      reader.next
    elsif char == "="
      add_token(:equals, "=")
      reader.next
    elsif char == "\""
      add_token(:string, read_quoted_string)
    elsif char == "/"
      add_token(:slash, "/")
      reader.next
    elsif char == "{"
      if reader.peek == "-"
        reader.next
        add_token(:ruby_no_eval, read_ruby_string)
      else
        add_token(:ruby, read_ruby_string)
      end
    elsif is_letter?(char)
      if @tokens[-1]&.type == :close_carrot
        add_token(:string, read_body_string)
      else
        add_token(:identifier, read_string)
      end
    else
      reader.next
    end
  end

  @tokens
end