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package scala.tools.nsc
package typechecker
trait StdAttachments {
self: Analyzer =>
import global._
/** Carries information necessary to expand the host tree.
* At times we need to store this info, because macro expansion can be delayed until its targs are inferred.
* After a macro application has been successfully expanded, this attachment is destroyed.
*/
type UnaffiliatedMacroContext = scala.reflect.macros.runtime.Context
type MacroContext = UnaffiliatedMacroContext { val universe: self.global.type }
case class MacroRuntimeAttachment(delayed: Boolean, typerContext: Context, macroContext: Option[MacroContext])
/** After being synthesized by the parser, primary constructors aren't fully baked yet.
* A call to super in such constructors is just a fill-me-in-later dummy resolved later
* by `parentTypes`. This attachment coordinates `parentTypes` and `typedTemplate` and
* allows them to complete the synthesis.
*/
case class SuperArgsAttachment(argss: List[List[Tree]])
/** Convenience method for `SuperArgsAttachment`.
* Compared with `MacroRuntimeAttachment` this attachment has different a usage pattern,
* so it really benefits from a dedicated extractor.
*/
def superArgs(tree: Tree): Option[List[List[Tree]]] =
tree.attachments.get[SuperArgsAttachment] collect { case SuperArgsAttachment(argss) => argss }
/** Determines whether the given tree has an associated SuperArgsAttachment.
*/
def hasSuperArgs(tree: Tree): Boolean = superArgs(tree).nonEmpty
}
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