// issue 47243
{`package issue47243_a; var x int32; var _ = x << 3`, `3`, `untyped int`},
- {`package issue47243_b; var x int32; var _ = x << 3.`, `3.`, `uint`}, // issue 47410: should be untyped float
+ {`package issue47243_b; var x int32; var _ = x << 3.`, `3.`, `untyped float`},
{`package issue47243_c; var x int32; var _ = 1 << x`, `1 << x`, `int`},
{`package issue47243_d; var x int32; var _ = 1 << x`, `1`, `int`},
{`package issue47243_e; var x int32; var _ = 1 << 2`, `1`, `untyped int`},
t.Fatal(err)
}
+ if manual && *goVersion != "" {
+ // goVersion overrides -lang for manual tests.
+ conf.GoVersion = *goVersion
+ }
+
// TODO(gri) remove this or use flag mechanism to set mode if still needed
if strings.HasSuffix(filenames[0], ".go1") {
// TODO(rfindley): re-enable this test by using GoVersion.
return
}
}
- }
-
- // Check that RHS is otherwise at least of integer type.
- switch {
- case allInteger(y.typ):
- if !allUnsigned(y.typ) && !check.allowVersion(check.pkg, 1, 13) {
- check.invalidOp(y, _InvalidShiftCount, "signed shift count %s requires go1.13 or later", y)
- x.mode = invalid
- return
- }
- case isUntyped(y.typ):
- // This is incorrect, but preserves pre-existing behavior.
- // See also bug #47410.
- check.convertUntyped(y, Typ[Uint])
- if y.mode == invalid {
+ } else {
+ // Check that RHS is otherwise at least of integer type.
+ switch {
+ case allInteger(y.typ):
+ if !allUnsigned(y.typ) && !check.allowVersion(check.pkg, 1, 13) {
+ check.invalidOp(y, _InvalidShiftCount, "signed shift count %s requires go1.13 or later", y)
+ x.mode = invalid
+ return
+ }
+ case isUntyped(y.typ):
+ // This is incorrect, but preserves pre-existing behavior.
+ // See also bug #47410.
+ check.convertUntyped(y, Typ[Uint])
+ if y.mode == invalid {
+ x.mode = invalid
+ return
+ }
+ default:
+ check.invalidOp(y, _InvalidShiftCount, "shift count %s must be integer", y)
x.mode = invalid
return
}
- default:
- check.invalidOp(y, _InvalidShiftCount, "shift count %s must be integer", y)
- x.mode = invalid
- return
}
if x.mode == constant_ {
--- /dev/null
+// -lang=go1.12
+
+// Copyright 2022 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 p
+
+type resultFlags uint
+
+// Example from #52031.
+//
+// The following shifts should not produce errors on Go < 1.13, as their
+// untyped constant operands are representable by type uint.
+const (
+ _ resultFlags = (1 << iota) / 2
+
+ reportEqual
+ reportUnequal
+ reportByIgnore
+ reportByMethod
+ reportByFunc
+ reportByCycle
+)
+
+// Invalid cases.
+var x int = 1
+var _ = (8 << x /* ERROR "signed shift count .* requires go1.13 or later" */)
+
+const _ = (1 << 1.2 /* ERROR "truncated to uint" */)
+
+var y float64
+var _ = (1 << y /* ERROR "must be integer" */)