Handles programmable member selections of Dynamic instances and values with structural types. Two functionalities:

1. Translates selection that does not typecheck according to the scala.Dynamic rules: foo.bar(baz) = quux ~~> foo.selectDynamic(bar).update(baz, quux) foo.bar = baz ~~> foo.updateDynamic("bar")(baz) foo.bar(x = bazX, y = bazY, baz, ...) ~~> foo.applyDynamicNamed("bar")(("x", bazX), ("y", bazY), ("", baz), ...) foo.bar(baz0, baz1, ...) ~~> foo.applyDynamic(bar)(baz0, baz1, ...) foo.bar ~~> foo.selectDynamic(bar)

The first matching rule of is applied.

1. Translates member selections on structural types to calls of selectDynamic or selectDynamicMethod on a Selectable instance. @See handleStructural.

An enumeration controlling the degree of forcing in "is-dully-defined" checks.

Info relating to implicits that is kept for one run

Implicit resolution

The implicit resolution part of type checking

Info relating to an import clause

Produces an inlined version of call via its inlined method.

This class creates symbols from definitions and imports and gives them lazy types.

Timeline:

During enter, trees are expanded as necessary, populating the expandedTree map. Symbols are created, and the symOfTree map is set up.

Symbol completion causes some trees to be already typechecked and typedTree entries are created to associate the typed trees with the untyped expanded originals.

During typer, original trees are first expanded using expandedTree. For each expanded member definition or import we extract and remove the corresponding symbol from the symOfTree map and complete it. We then consult the typedTree map to see whether a typed tree exists already. If yes, the typed tree is returned as result. Otherwise, we proceed with regular type checking.

The scheme is designed to allow sharing of nodes, as long as each duplicate appears in a different method.

A version of Typer that keeps all symbols defined and referenced in a previously typed tree.

All definition nodes keep their symbols. All leaf nodes for idents, selects, and TypeTrees keep their types. Indexing is a no-op.

Otherwise, everything is as in Typer.

Records the history of currently open implicit searches

A set of term references where equality is =:=

Provides check method to check that all top-level definitions in tree are variance correct. Does not recurse inside methods. The method should be invoked once for each Template.