diff options
Diffstat (limited to 'src/go/types/unify.go')
| -rw-r--r-- | src/go/types/unify.go | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/go/types/unify.go b/src/go/types/unify.go index 1b1d875dad..bef851f423 100644 --- a/src/go/types/unify.go +++ b/src/go/types/unify.go @@ -412,8 +412,11 @@ func (u *unifier) nify(x, y Type, mode unifyMode, p *ifacePair) (result bool) { // recorded an underlying type (go.dev/issue/43056). // Either both types are interfaces, or neither type is. // If both are interfaces, they have the same methods. - // TODO(gri) We probably can do this only for inexact - // unification. Need to find a failure case. + // + // Note: Changing the recorded type for a type parameter to + // a defined type is only ok when unification is inexact. + // But in exact unification, if we have a match, x and y must + // be identical, so changing the recorded type for x is a no-op. if yn { u.set(px, y) } |