已刪除：符號文字

不再支援符號字面值。

scala.Symbol 類別仍然存在，因此符號字面值 'xyz 的字面翻譯為 Symbol("xyz")。不過，建議改用一般字串字面值 "xyz"。（Symbol 類別將在未來棄用並移除）。範例

scalac Test.scala
-- Error: Test.scala:1:25 ------------------------------------------------------------------------------------------------

1 |@main def test = println('abc)
  |                         ^
  |                         symbol literal 'abc is no longer supported,
  |                         use a string literal "abc" or an application Symbol("abc") instead,
  |                         or enclose in braces '{abc} if you want a quoted expression.
  |                         For now, you can also `import language.deprecated.symbolLiterals` to accept
  |                         the idiom, but this possibility might no longer be available in the future.
1 error found