flowchart LR
  Start[Start]
  Stop[Stop]
  Start --> Init(( ))
  Init --> OpenQuote([<tt>'</tt>])
  OpenQuote --> EndQuote([<tt>'</tt>])
  OpenQuote --> PreChar(( ))
  PreChar --> EndQuote
  PreChar --> Char{{any character except <tt>'</tt> or CR/LF}}
  Char --> PreChar
  PreChar --> DoubleQuote([<tt>''</tt>])
  DoubleQuote --> PreChar
  EndQuote --> Final(( ))
  Init --> Pound([<tt>#</tt>])
  Pound --> Dollar([<tt>$</tt>])
  Pound --> Dec{{<tt>0</tt>..<tt>9</tt>}}
  Dec --> Dec
  Dec --> Final
  Dollar --> Hex([<a href="HexDigit">HexDigit</a>])
  Hex --> Hex
  Hex --> Final
  Final --> Init
  Final --> Stop

  style Start fill:#44E
  style Stop fill:#E44

flowchart LR
  Start[Start]
  Stop[Stop]
  Start --> OpenQuote([<tt>&quot</tt>])
  OpenQuote --> Pre(( ))
  Pre --> Esc([<tt>\</tt>])
  Esc --> EscSymbol{{<tt>&quot</tt>, <tt>'</tt>, <tt>\</tt>, <tt>/</tt>, <tt>b</tt>, <tt>f</tt>, <tt>n</tt>, <tt>r</tt>, <tt>t</tt>, <tt>B</tt>, <tt>F</tt>, <tt>N</tt>, <tt>R</tt>, <tt>T</tt>}}
  EscSymbol ------> Post(( ))
  Esc --> Esc3A{{<tt>0</tt>..<tt>3</tt>}}
  Esc3A --> Esc3B{{<tt>0</tt>..<tt>7</tt>}}
  Esc3B --> Esc3C{{<tt>0</tt>..<tt>7</tt>}}
  Esc3C ----> Post
  Esc --> Esc7A{{<tt>4</tt>..<tt>7</tt>}}
  Esc7A --> Esc7B{{<tt>0</tt>..<tt>7</tt>}}
  Esc7B -----> Post
  Esc --> EscX{{<tt>x</tt>, <tt>X</tt>}}
  EscX --> EscX1([<a href="HexDigit">HexDigit</a>])
  EscX1 --> EscX2([<a href="HexDigit">HexDigit</a>])
  EscX2 ----> Post
  Esc --> EscU{{<tt>u</tt>, <tt>U</tt>}}
  EscU --> EscU1([<a href="HexDigit">HexDigit</a>])
  EscU1 --> EscU2([<a href="HexDigit">HexDigit</a>])
  EscU2 --> EscU3([<a href="HexDigit">HexDigit</a>])
  EscU3 --> EscU4([<a href="HexDigit">HexDigit</a>])
  EscU4 --> Post
  Pre --> Char{{any character except <tt>&quot</tt>, <tt>\</tt>, or CR/LF}}
  Char --> Pre
  Pre --> Post
  Post --> Pre
  Post --> EndQuote([<tt>&quot</tt>])
  EndQuote --> Stop

  style Start fill:#44E
  style Stop fill:#E44