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go/types: don't declare 'comparable' when typeparams are disabled

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Fixes #46453

Change-Id: I92b9b1e43ec5182162b2eeeb667f1f548ea373a5
Reviewed-on: https://go-review.googlesource.com/c/go/+/323609
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Rob Findley 2021-05-29 22:14:12 -04:00 committed by Robert Findley
parent 1607c28172
commit 3b770f2ccb
2 changed files with 12 additions and 1 deletions
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8
src/go/types/check_test.go
View file

@ -330,6 +330,14 @@ func TestIndexRepresentability(t *testing.T) {
checkFiles(t, &StdSizes{4, 4}, "", []string{"index.go"}, [][]byte{[]byte(src)}, false)
}
func TestIssue46453(t *testing.T) {
if typeparams.Enabled {
t.Skip("type params are enabled")
}
const src = "package p\ntype _ comparable // ERROR \"undeclared name: comparable\""
checkFiles(t, nil, "", []string{"issue46453.go"}, [][]byte{[]byte(src)}, false)
}
func TestCheck(t *testing.T) { DefPredeclaredTestFuncs(); testDir(t, "check") }
func TestExamples(t *testing.T) { testDir(t, "examples") }
func TestFixedbugs(t *testing.T) { testDir(t, "fixedbugs") }

5
src/go/types/universe.go
View file

@ -8,6 +8,7 @@ package types
import (
"go/constant"
"go/internal/typeparams"
"go/token"
"strings"
)
@ -237,7 +238,9 @@ func init() {
defPredeclaredConsts()
defPredeclaredNil()
defPredeclaredFuncs()
defPredeclaredComparable()
if typeparams.Enabled {
defPredeclaredComparable()
}
universeIota = Universe.Lookup("iota").(*Const)
universeByte = Universe.Lookup("byte").(*TypeName).typ.(*Basic)