Class: ComponentEmbeddedRuby::Lexer

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

Defined Under Namespace

Classes: InputReader, Position, RubyCodeReader, StringReader, 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 12

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

  @tokens = []
end

Instance Method Details

#lex ⇒ Object

rubocop:disable Metrics/CyclomaticComplexity, Metrics/MethodLength, Metrics/PerceivedComplexity



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# File 'lib/component_embedded_ruby/lexer.rb', line 18

def lex # rubocop:disable Metrics/CyclomaticComplexity, Metrics/MethodLength, Metrics/PerceivedComplexity
  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 letter?(char)
      position = Position.new(reader.current_line, reader.current_column)

      if @tokens[-1]&.type == :close_carrot
        add_token(:string, read_body_string, position)
      else
        add_token(:identifier, read_string, position)
      end
    else
      reader.next
    end
  end

  @tokens
end