重新运行-feature以获取详细信息

Question

当我在Play控制台中编译scala时,我得到了这个:

[warn] there were 1 feature warning(s); re-run with -feature for details
[warn] one warning found

我认为这意味着compile -feature,但我得到了这个:

[error] Expected ID character
[error] Not a valid command: compile (similar: completions)
[error] Expected project ID
[error] Expected configuration
[error] Expected ':' (if selecting a configuration)
[error] Expected key
[error] Expected '::'
[error] Expected end of input.
[error] compile -feature
[error]     

然后我跑play -feature,我得到了这个:

[warn] The `-` command is deprecated in favor of `onFailure` and will be removed in 0.14.0

并且放弃了.

那我该怎么做呢？

Answer 1

你必须添加

scalacOptions += "-feature"

如果您的sbt控制台正在运行(或重新启动),请build.sbt执行并执行reload.

或者,如果您只想为单个会话设置它,而在sbt控制台中,您可以编写build.sbt,此设置立即应用,无需重新加载或重新启动sbt控制台.

Answer 2

只是为了完成,如果你在play/sbt repl中,你可以修改scalacOptionsjust for session 的值,如下所示: