使用-feature重新运行以获取详细信息

问题描述

当我在Play控制台中编译scala时，我得到了:

When I compile scala in play console, I got this:

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

我以为是compile -feature的意思，但是我明白了:

I thought it means compile -feature, but I got this:

[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]

然后我运行play -feature，我得到了:

Then I run play -feature, I got this:

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

然后退出游戏.

那我应该怎么做?

推荐答案

您必须添加

scalacOptions += "-feature"

到build.sbt，如果sbt控制台正在运行(或重新启动)，则执行reload.

to your build.sbt and execute reload if your sbt console is running (or restart it).

或者，如果您只想在sbt控制台中为单个会话设置它.

Alternatively if you want to set it only for a single session, while in sbt console.

set scalacOptions += "-feature"

您可以编写，此设置将立即应用，无需重新加载或重新启动sbt控制台.

You can write, this setting is applied immediately, no need to reload or restart sbt console.

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