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package scala.reflect.macros
package contexts
trait Typers {
self: Context =>
def openMacros: List[Context] = this :: universe.analyzer.openMacros
def openImplicits: List[ImplicitCandidate] = callsiteTyper.context.openImplicits.map(_.toImplicitCandidate)
type TypecheckMode = scala.reflect.internal.Mode
val TypecheckMode = scala.reflect.internal.Mode
val TERMmode = TypecheckMode.EXPRmode
val TYPEmode = TypecheckMode.TYPEmode | TypecheckMode.FUNmode
val PATTERNmode = TypecheckMode.PATTERNmode
/**
* @see [[scala.tools.reflect.ToolBox.typeCheck]]
*/
def typecheck(tree: Tree, mode: TypecheckMode = TERMmode, pt: Type = universe.WildcardType, silent: Boolean = false, withImplicitViewsDisabled: Boolean = false, withMacrosDisabled: Boolean = false): Tree = {
macroLogVerbose("typechecking %s with expected type %s, implicit views = %s, macros = %s".format(tree, pt, !withImplicitViewsDisabled, !withMacrosDisabled))
val context = callsiteTyper.context
val withImplicitFlag = if (!withImplicitViewsDisabled) (context.withImplicitsEnabled[Tree] _) else (context.withImplicitsDisabled[Tree] _)
val withMacroFlag = if (!withMacrosDisabled) (context.withMacrosEnabled[Tree] _) else (context.withMacrosDisabled[Tree] _)
def withContext(tree: => Tree) = withImplicitFlag(withMacroFlag(tree))
def withWrapping(tree: Tree)(op: Tree => Tree) = if (mode == TERMmode) universe.wrappingIntoTerm(tree)(op) else op(tree)
def typecheckInternal(tree: Tree) = callsiteTyper.silent(_.typed(universe.duplicateAndKeepPositions(tree), mode, pt), reportAmbiguousErrors = false)
withWrapping(tree)(wrappedTree => withContext(typecheckInternal(wrappedTree) match {
case universe.analyzer.SilentResultValue(result) =>
macroLogVerbose(result)
result
case error @ universe.analyzer.SilentTypeError(_) =>
macroLogVerbose(error.err.errMsg)
if (!silent) throw new TypecheckException(error.err.errPos, error.err.errMsg)
universe.EmptyTree
}))
}
def inferImplicitValue(pt: Type, silent: Boolean = true, withMacrosDisabled: Boolean = false, pos: Position = enclosingPosition): Tree = {
macroLogVerbose("inferring implicit value of type %s, macros = %s".format(pt, !withMacrosDisabled))
universe.analyzer.inferImplicit(universe.EmptyTree, pt, false, callsiteTyper.context, silent, withMacrosDisabled, pos, (pos, msg) => throw TypecheckException(pos, msg))
}
def inferImplicitView(tree: Tree, from: Type, to: Type, silent: Boolean = true, withMacrosDisabled: Boolean = false, pos: Position = enclosingPosition): Tree = {
macroLogVerbose("inferring implicit view from %s to %s for %s, macros = %s".format(from, to, tree, !withMacrosDisabled))
val viewTpe = universe.appliedType(universe.definitions.FunctionClass(1).toTypeConstructor, List(from, to))
universe.analyzer.inferImplicit(tree, viewTpe, true, callsiteTyper.context, silent, withMacrosDisabled, pos, (pos, msg) => throw TypecheckException(pos, msg))
}
def resetLocalAttrs(tree: Tree): Tree = universe.resetAttrs(universe.duplicateAndKeepPositions(tree))
def untypecheck(tree: Tree): Tree = resetLocalAttrs(tree)
}
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