1 files changed, 37 insertions, 20 deletions

diff --git a/vendor/golang.org/x/tools/internal/aliases/aliases_go122.go b/vendor/golang.org/x/tools/internal/aliases/aliases_go122.go
index b32995484..7716a3331 100644
--- a/vendor/golang.org/x/tools/internal/aliases/aliases_go122.go
+++ b/vendor/golang.org/x/tools/internal/aliases/aliases_go122.go
@@ -2,9 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build go1.22
-// +build go1.22
-
 package aliases
 
 import (
@@ -14,31 +11,51 @@ import (
 	"go/types"
 )
 
-// Alias is an alias of types.Alias.
-type Alias = types.Alias
-
 // Rhs returns the type on the right-hand side of the alias declaration.
-func Rhs(alias *Alias) types.Type {
+func Rhs(alias *types.Alias) types.Type {
 	if alias, ok := any(alias).(interface{ Rhs() types.Type }); ok {
 		return alias.Rhs() // go1.23+
 	}
 
 	// go1.22's Alias didn't have the Rhs method,
 	// so Unalias is the best we can do.
-	return Unalias(alias)
+	return types.Unalias(alias)
+}
+
+// TypeParams returns the type parameter list of the alias.
+func TypeParams(alias *types.Alias) *types.TypeParamList {
+	if alias, ok := any(alias).(interface{ TypeParams() *types.TypeParamList }); ok {
+		return alias.TypeParams() // go1.23+
+	}
+	return nil
+}
+
+// SetTypeParams sets the type parameters of the alias type.
+func SetTypeParams(alias *types.Alias, tparams []*types.TypeParam) {
+	if alias, ok := any(alias).(interface {
+		SetTypeParams(tparams []*types.TypeParam)
+	}); ok {
+		alias.SetTypeParams(tparams) // go1.23+
+	} else if len(tparams) > 0 {
+		panic("cannot set type parameters of an Alias type in go1.22")
+	}
+}
+
+// TypeArgs returns the type arguments used to instantiate the Alias type.
+func TypeArgs(alias *types.Alias) *types.TypeList {
+	if alias, ok := any(alias).(interface{ TypeArgs() *types.TypeList }); ok {
+		return alias.TypeArgs() // go1.23+
+	}
+	return nil // empty (go1.22)
 }
 
-// Unalias is a wrapper of types.Unalias.
-func Unalias(t types.Type) types.Type { return types.Unalias(t) }
-
-// newAlias is an internal alias around types.NewAlias.
-// Direct usage is discouraged as the moment.
-// Try to use NewAlias instead.
-func newAlias(tname *types.TypeName, rhs types.Type) *Alias {
-	a := types.NewAlias(tname, rhs)
-	// TODO(go.dev/issue/65455): Remove kludgy workaround to set a.actual as a side-effect.
-	Unalias(a)
-	return a
+// Origin returns the generic Alias type of which alias is an instance.
+// If alias is not an instance of a generic alias, Origin returns alias.
+func Origin(alias *types.Alias) *types.Alias {
+	if alias, ok := any(alias).(interface{ Origin() *types.Alias }); ok {
+		return alias.Origin() // go1.23+
+	}
+	return alias // not an instance of a generic alias (go1.22)
 }
 
 // Enabled reports whether [NewAlias] should create [types.Alias] types.
@@ -56,7 +73,7 @@ func Enabled() bool {
 	//     many tests. Therefore any attempt to cache the result
 	//     is just incorrect.
 	fset := token.NewFileSet()
-	f, _ := parser.ParseFile(fset, "a.go", "package p; type A = int", 0)
+	f, _ := parser.ParseFile(fset, "a.go", "package p; type A = int", parser.SkipObjectResolution)
 	pkg, _ := new(types.Config).Check("p", fset, []*ast.File{f}, nil)
 	_, enabled := pkg.Scope().Lookup("A").Type().(*types.Alias)
 	return enabled