Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

[dev.typeparams] cmd/compile/internal/types2: type alias decl requires go1.9

Browse source 
Add respective check to type checker.
Remove respective check from the compiler's new type2-based noder.

Updates #31793.

Change-Id: I907e3acab4c136027a8c3db1e9bac301d209c2e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/289570
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
This commit is contained in:
Robert Griesemer 2021-02-03 22:34:34 -08:00
parent 721488498a
commit f37b0c6c12
3 changed files with 13 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

4
src/cmd/compile/internal/noder/decl.go
View file

@ -102,10 +102,6 @@ func (g *irgen) funcDecl(out *ir.Nodes, decl *syntax.FuncDecl) {
func (g *irgen) typeDecl(out *ir.Nodes, decl *syntax.TypeDecl) {
if decl.Alias {
if !types.AllowsGoVersion(types.LocalPkg, 1, 9) {
base.ErrorfAt(g.pos(decl), "type aliases only supported as of -lang=go1.9")
}
name, _ := g.def(decl.Name)
g.pragmaFlags(decl.Pragma, 0)

3
src/cmd/compile/internal/types2/decl.go
View file

@ -629,6 +629,9 @@ func (check *Checker) typeDecl(obj *TypeName, tdecl *syntax.TypeDecl, def *Named
if alias {
// type alias declaration
if !check.allowVersion(obj.pkg, 1, 9) {
check.errorf(tdecl, "type aliases requires go1.9 or later")
}
obj.typ = Typ[Invalid]
obj.typ = check.anyType(tdecl.Type)

10
src/cmd/compile/internal/types2/testdata/go1_8.src vendored Normal file
View file

@ -0,0 +1,10 @@
// Copyright 2021 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.
// Check Go language version-specific errors.
package go1_8 // go1.8
// type alias declarations
type any /* ERROR type aliases requires go1.9 or later */ = interface{}