33 lines
1.1 KiB
Go
33 lines
1.1 KiB
Go
// Copyright 2024 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package aliases
|
|
|
|
import (
|
|
"go/token"
|
|
"go/types"
|
|
)
|
|
|
|
// Package aliases defines backward compatible shims
|
|
// for the types.Alias type representation added in 1.22.
|
|
// This defines placeholders for x/tools until 1.26.
|
|
|
|
// NewAlias creates a new TypeName in Package pkg that
|
|
// is an alias for the type rhs.
|
|
//
|
|
// The enabled parameter determines whether the resulting [TypeName]'s
|
|
// type is an [types.Alias]. Its value must be the result of a call to
|
|
// [Enabled], which computes the effective value of
|
|
// GODEBUG=gotypesalias=... by invoking the type checker. The Enabled
|
|
// function is expensive and should be called once per task (e.g.
|
|
// package import), not once per call to NewAlias.
|
|
func NewAlias(enabled bool, pos token.Pos, pkg *types.Package, name string, rhs types.Type) *types.TypeName {
|
|
if enabled {
|
|
tname := types.NewTypeName(pos, pkg, name, nil)
|
|
newAlias(tname, rhs)
|
|
return tname
|
|
}
|
|
return types.NewTypeName(pos, pkg, name, rhs)
|
|
}
|