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package dotty.tools
package dotc
package typer
import core._
import ast.{Trees, untpd, tpd, TreeInfo}
import util.Positions._
import Contexts._
import Types._
import Flags._
import Denotations._
import NameOps._
import Symbols._
import Types._
import Decorators._
import Names._
import StdNames._
import Constants._
import Inferencing._
import collection.mutable
trait Implicits { self: Typer =>
import tpd._
def viewExists(from: Type, to: Type)(implicit ctx: Context): Boolean = (
!from.isError
&& !to.isError
&& ctx.implicitsEnabled
&& inferView(EmptyTree, from, to, reportAmbiguous = false) != EmptyTree
)
def inferView(tree: Tree, from: Type, to: Type, reportAmbiguous: Boolean)(implicit ctx: Context): Tree =
inferImplicit(tree, defn.FunctionType(from :: Nil, to), isView = true, reportAmbiguous)
def inferImplicit(tree: Tree, pt: Type, isView: Boolean, reportAmbiguous: Boolean)(implicit ctx: Context): Tree = ???
}
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