StopLookup is used as return value from a LookupFunc function to indicate that the lookup should be stopped.

Package implements ImportablePackage given its name and declarations.

Declaration represents a declaration.

Env represents an execution environment.

ImportablePackage represents an importable package.

Importer represents a package importer; Import returns the native package with the given package path.

CombinedImporter combines multiple importers into one importer.

CombinedPackage implements an ImportablePackage by combining multiple packages into one package with name the name of the first package and as declarations the declarations of all packages.

Declarations represents a set of variables, constants, functions, types and packages declarations and can be used for template globals and package declarations.

LookupFunc is the type of the function called by ImportablePackage.LookupFunc to read each package declaration.

Packages implements Importer using a map of ImportablePackage.