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// SPDX-License-Identifier: Apache-2.0
package chisel3.internal
import scala.reflect.macros.whitebox.Context
import scala.annotation.{compileTimeOnly, StaticAnnotation}
import scala.language.experimental.macros
// Workaround for https://github.com/sbt/sbt/issues/3966
object RuntimeDeprecatedTransform
class RuntimeDeprecatedTransform(val c: Context) {
import c.universe._
/** Adds a Builder.deprecated(...) call based on the contents of a plain @deprecated annotation.
*/
def runtimeDeprecated(annottees: c.Tree*): c.Tree = {
val transformed = annottees.map(annottee =>
annottee match {
case q"$mods def $tname[..$tparams](...$paramss): $tpt = $expr" => {
val Modifiers(_, _, annotations) = mods
val annotationMessage = annotations.collect { // get all messages from deprecated annotations
case q"new deprecated($desc, $since)" => desc
} match { // ensure there's only one and return it
case msg :: Nil => msg
case _ =>
c.abort(
c.enclosingPosition,
s"@chiselRuntimeDeprecated annotion must be used with exactly one @deprecated annotation, got annotations $annotations"
)
}
val message = s"$tname is deprecated: $annotationMessage"
val transformedExpr = q""" {
_root_.chisel3.internal.Builder.deprecated($message)
$expr
} """
q"$mods def $tname[..$tparams](...$paramss): $tpt = $transformedExpr"
}
case other =>
c.abort(
c.enclosingPosition,
s"@chiselRuntimeDeprecated annotion may only be used on defs, got ${showCode(other)}"
)
}
)
q"..$transformed"
}
}
@compileTimeOnly("enable macro paradise to expand macro annotations")
class chiselRuntimeDeprecated extends StaticAnnotation {
def macroTransform(annottees: Any*): Any = macro chisel3.internal.RuntimeDeprecatedTransform.runtimeDeprecated
}
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