在Scala 2.12中，这些选项之间存在任何差异：
-Xlint:adapted-args vs -Ywarn-adapted-args -Xlint:nullary-unit vs -Ywarn-nullary-unit -Xlint:inaccessible vs -Ywarn-inaccessible -Xlint:nullary-override vs -Ywarn-nullary-override -Xlint:infer-any vs -Ywarn-infer-any 如果没有，哪一个使用更有意义？我还使用fatal-warnings以及几乎所有-Ywarn和-Xlint选项进行编译。
答案 0 :(得分：3)
如果您运行scalac -Xlint:help，您将会看到
❯ scalac -Xlint:help
Enable or disable specific warnings
adapted-args Warn if an argument list is modified to match the receiver.
nullary-unit Warn when nullary methods return Unit.
inaccessible Warn about inaccessible types in method signatures.
nullary-override Warn when non-nullary `def f()' overrides nullary `def f'.
infer-any Warn when a type argument is inferred to be `Any`.
missing-interpolator A string literal appears to be missing an interpolator id.
doc-detached A Scaladoc comment appears to be detached from its element.
private-shadow A private field (or class parameter) shadows a superclass field.
type-parameter-shadow A local type parameter shadows a type already in scope.
poly-implicit-overload Parameterized overloaded implicit methods are not visible as viewbounds.
option-implicit Option.apply used implicit view.
delayedinit-select Selecting member of DelayedInit.
by-name-right-associative By-name parameter of right associative operator.
package-object-classes Class or object defined in package object.
unsound-match Pattern match may not be typesafe.
stars-align Pattern sequence wildcard must align with sequence component.
constant Evaluation of a constant arithmetic expression results in an error.
unused Enable -Ywarn-unused:imports,privates,locals,implicits.
Default: All choices are enabled by default.
所以在选择Xlint选项或直接使用相应的标志之间没有区别。我会选择-Xlint（没有选项，因此默认情况下全部启用）并删除我不需要的选项，例如
-Xlint:-unused,_
启用unused标记以外的所有内容。