go/src/cmd/compile/internal/types/universe.go

var basicTypes …

var typedefs …

func InitTypes(defTypeName func(sym *Sym, typ *Type) Object) { … }

func makeErrorInterface() *Type { … }

// makeComparableInterface makes the predefined "comparable" interface in the
// built-in package. It has a unique name, but no methods.
func makeComparableInterface() *Type { … }