### Strings

[
  Type   strings
  Funcon string
  Funcon string-append
  Funcon to-string
]


Type
  strings ~> lists(characters)


Funcon
  string(C*:characters*) : =>strings
    ~> [C*]
/*
  Literal strings are written `"C1...Cn"`.
  A double-quote or backslash needs to be escaped: `"...\"..."`, `"...\\..."`.
*/


Funcon
  string-append(S*:strings*) : =>strings
    ~> list-append(S*)


Built-in Funcon
  to-string(_:ground-values) : =>strings
/*
  The strings returned by `to-string(GV)` are unspecified, except that when
  `GV` is already a string, it is returned unchanged.
*/
Assert
  to-string(S:strings) == S