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[dev.typeparams] cmd/compile/internal/types2: use same sort criteria for methods as compiler

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Note: This invalidates the implementation of MethodSet further (it
also has not been updated to accomodate for type parameters). But
types2 doesn't make use of it. We should remove it.

Change-Id: Ia2601bdd59b3f3ee0b72bc2512153c42bf5053b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/285994
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Robert Griesemer 2021-01-22 16:49:21 -08:00
parent 2b95c28b18
commit 5347241b5e
2 changed files with 31 additions and 1 deletions
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30
src/cmd/compile/internal/types2/object.go
View File

@ -330,6 +330,36 @@ func (obj *Func) FullName() string {
// Scope returns the scope of the function's body block.
func (obj *Func) Scope() *Scope { return obj.typ.(*Signature).scope }
// Less reports whether function a is ordered before function b.
//
// Functions are ordered exported before non-exported, then by name,
// and finally (for non-exported functions) by package path.
//
// TODO(gri) The compiler also sorts by package height before package
// path for non-exported names.
func (a *Func) less(b *Func) bool {
if a == b {
return false
}
// Exported functions before non-exported.
ea := isExported(a.name)
eb := isExported(b.name)
if ea != eb {
return ea
}
// Order by name and then (for non-exported names) by package.
if a.name != b.name {
return a.name < b.name
}
if !ea {
return a.pkg.path < b.pkg.path
}
return false
}
func (*Func) isDependency() {} // a function may be a dependency of an initialization expression
// A Label represents a declared label.

2
src/cmd/compile/internal/types2/typexpr.go
View File

@ -1064,7 +1064,7 @@ func assertSortedMethods(list []*Func) {
type byUniqueMethodName []*Func
func (a byUniqueMethodName) Len() int { return len(a) }
func (a byUniqueMethodName) Less(i, j int) bool { return a[i].Id() < a[j].Id() }
func (a byUniqueMethodName) Less(i, j int) bool { return a[i].less(a[j]) }
func (a byUniqueMethodName) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (check *Checker) tag(t *syntax.BasicLit) string {