aliases_go121.go

     1  // Copyright 2024 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build !go1.22
     6  // +build !go1.22
     7  
     8  package aliases
     9  
    10  import (
    11  	"go/types"
    12  )
    13  
    14  // Alias is a placeholder for a go/types.Alias for <=1.21.
    15  // It will never be created by go/types.
    16  type Alias struct{}
    17  
    18  func (*Alias) String() string         { panic("unreachable") }
    19  func (*Alias) Underlying() types.Type { panic("unreachable") }
    20  func (*Alias) Obj() *types.TypeName   { panic("unreachable") }
    21  func Rhs(alias *Alias) types.Type     { panic("unreachable") }
    22  
    23  // Unalias returns the type t for go <=1.21.
    24  func Unalias(t types.Type) types.Type { return t }
    25  
    26  func newAlias(name *types.TypeName, rhs types.Type) *Alias { panic("unreachable") }
    27  
    28  // Enabled reports whether [NewAlias] should create [types.Alias] types.
    29  //
    30  // Before go1.22, this function always returns false.
    31  func Enabled() bool { return false }
    32
View as plain text