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go/types: rename IsMethodSet to IsConstraint (cleanup)

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This is a port of CL 344872 to go/types.

Change-Id: Id794f1fc3b86779ee32dbe5e656ffc747d44c3e2
Reviewed-on: https://go-review.googlesource.com/c/go/+/346434
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Robert Findley 2021-08-31 14:57:24 -04:00
parent b93581e47d
commit ae2b2dc01a
3 changed files with 4 additions and 6 deletions
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2
src/go/types/interface.go
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@ -105,7 +105,7 @@ func (t *Interface) Empty() bool { return t.typeSet().IsAll() }
func (t *Interface) IsComparable() bool { return t.typeSet().IsComparable() }
// IsConstraint reports whether interface t is not just a method set.
func (t *Interface) IsConstraint() bool { return !t.typeSet().IsMethodSet() }
func (t *Interface) IsConstraint() bool { return t.typeSet().IsConstraint() }
// Complete computes the interface's type set. It must be called by users of
// NewInterfaceType and NewInterface after the interface's embedded types are

6
src/go/types/typeset.go
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@ -28,10 +28,8 @@ func (s *_TypeSet) IsEmpty() bool { return s.terms.isEmpty() }
// IsAll reports whether type set s is the set of all types (corresponding to the empty interface).
func (s *_TypeSet) IsAll() bool { return !s.comparable && len(s.methods) == 0 && s.terms.isAll() }
// TODO(gri) IsMethodSet is not a great name for this predicate. Find a better one.
// IsMethodSet reports whether the type set s is described by a single set of methods.
func (s *_TypeSet) IsMethodSet() bool { return !s.comparable && s.terms.isAll() }
// IsConstraint reports whether type set s is not just a set of methods.
func (s *_TypeSet) IsConstraint() bool { return s.comparable || !s.terms.isAll() }
// IsComparable reports whether each type in the set is comparable.
func (s *_TypeSet) IsComparable() bool {

2
src/go/types/typexpr.go
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@ -149,7 +149,7 @@ func (check *Checker) ordinaryType(pos positioner, typ Type) {
check.later(func() {
if t := asInterface(typ); t != nil {
tset := computeInterfaceTypeSet(check, pos.Pos(), t) // TODO(gri) is this the correct position?
if !tset.IsMethodSet() {
if tset.IsConstraint() {
if tset.comparable {
check.softErrorf(pos, _Todo, "interface is (or embeds) comparable")
} else {