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package dotty.tools.dotc
package transform
import core._
import DenotTransformers.IdentityDenotTransformer
import Contexts.Context
import Symbols._
import Scopes._
import Flags._
import StdNames._
import SymDenotations._
import Types._
import collection.mutable
import TreeTransforms._
import Decorators._
import ast.Trees._
import TreeTransforms._
/** Makes private methods static, provided they not deferred, accessors, or static,
* by rewriting a method `m` in class `C` as follows:
*
* private def m(ps) = e
*
* --> private static def($this: C, ps) = [this -> $this] e
*/
class ExpandPrivate extends MiniPhaseTransform with IdentityDenotTransformer { thisTransform =>
import ast.tpd._
override def phaseName: String = "expandPrivate"
/** Make private terms accessed from different classes non-private.
* Note: this happens also for accesses between class and linked module class.
* If we change the scheme at one point to make static module class computations
* static members of the companion class, we should tighten the condition below.
*/
private def ensurePrivateAccessible(d: SymDenotation)(implicit ctx: Context) =
if (d.is(PrivateTerm) && d.owner != ctx.owner.enclosingClass)
d.ensureNotPrivate.installAfter(thisTransform)
override def transformIdent(tree: Ident)(implicit ctx: Context, info: TransformerInfo) = {
ensurePrivateAccessible(tree.symbol)
tree
}
override def transformSelect(tree: Select)(implicit ctx: Context, info: TransformerInfo) = {
ensurePrivateAccessible(tree.symbol)
tree
}
}
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