scala - 是否可以在 Scala 中强制命名参数？

Question

在某些方法中，我想强制命名参数。原因是未指定参数顺序的自动生成代码(并将保持这种状态)。

我能得到的最接近的是

private val _forceNamed: Object = new Object()

def doSomething(forceNamed: Object = _forceNamed, arg1: String, arg2: String, ...): Unit = {
  if (forceNamed != _forceNamed) {
    throw Exception(something)
  }

  // actually do stuff
}

然而，这只在运行时失败，而在编译时失败会更好。

Answer 1

为此，我们在代码库中有这个:

object `(Please use explicitly named arguments)`
def foo(
  `(Please use explicitly named arguments)`:
    `(Please use explicitly named arguments)`.type =
    `(Please use explicitly named arguments)`,
  namedArg1: Int,
  namedArg2: String,
  ...
) = ...