Scala 中是否有与 SuppressWarnings 等效的方法？
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Is there an equivalent to SuppressWarnings in Scala?
提问by BenjaminHymanman
I was wondering if scala had an equivalent to java's @SuppressWarningsthat can be applied to a function or whatever to ignore any deprecation warnings[1] that function emits?
我想知道 scala 是否有相当于 java 的@SuppressWarnings可以应用于函数或忽略该函数发出的任何弃用警告 [1] 的任何内容？
1: Relevant warning in my case is: method stop in class Thread is deprecated: see corresponding Javadoc for more information.I am aware of the problems with stop however there are still some cases where due to legacy code we have to use it.
1：在我的案例中的相关警告是：method stop in class Thread is deprecated: see corresponding Javadoc for more information.我知道 stop 的问题，但是仍有一些情况由于遗留代码我们必须使用它。
采纳答案by retronym
No, and an enhancement request [1] for such a feature was closed as wontfix.
不，并且针对此类功能的增强请求 [1] 已关闭为wontfix。
I agree it would be useful. I expect that the Scala core team aren't against the idea, but they have finite resources and many higher priorities.
我同意这会很有用。我希望 Scala 核心团队不会反对这个想法，但他们的资源有限，而且有许多更高的优先级。
回答by ghik
回答by Mario Galic
Scala 2.13.2 provides @nowarnannotation developed on the basis of ghik's silencer, for example
Scala 2.13.2提供@nowarn了在ghik的基础上开发的注解silencer，例如
import scala.annotation.nowarn
def t = { 0: @nowarn; 1 }
raises no warnings, whilst
不发出警告，而
def t = { 0; 1 }
gives
给
warning: a pure expression does nothing in statement position; multiline expressions might require enclosing parentheses
def t = { 0; 1 }
^
回答by Guillaume Massé
Here is how to suppress all warnings in sbt:
以下是在 sbt 中抑制所有警告的方法：
import sbt._
import Keys._
import KeyRanks.DTask
import xsbti.{Reporter, Problem, Position, Severity}
private lazy val compilerReporter = TaskKey[xsbti.Reporter](
"compilerReporter",
"Experimental hook to listen (or send) compilation failure messages.",
DTask
)
val ignoreWarnings = Seq(
compilerReporter in (Compile, compile) :=
new xsbti.Reporter {
private val buffer = collection.mutable.ArrayBuffer.empty[Problem]
def reset(): Unit = buffer.clear()
def hasErrors: Boolean = buffer.exists(_.severity == Severity.Error)
def hasWarnings: Boolean = buffer.exists(_.severity == Severity.Warn)
def printSummary(): Unit = {
print("3c")
if (problems.nonEmpty) {
problems.foreach{ p =>
println("=====================================================")
println(p.position)
println(p.message)
println()
println()
}
}
}
def problems: Array[Problem] = buffer.toArray
def log(problem: Problem): Unit = {
if (problem.severity == Severity.Error) {
buffer.append(problem)
}
}
def log(pos: Position, msg: String, sev: Severity): Unit = {
log(new Problem {
def category: String = "foo"
def severity: Severity = sev
def message: String = msg
def position: Position = pos
})
}
def comment(pos: xsbti.Position, msg: String): Unit = ()
}
)
