| // 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. |
| |
| // This file contains test cases for typeset-only constraint elements. |
| // TODO(gri) gofmt once/if gofmt supports this notation. |
| |
| package p |
| |
| type ( |
| _[_ t] t |
| _[_ ~t] t |
| _[_ t|t] t |
| _[_ ~t|t] t |
| _[_ t|~t] t |
| _[_ ~t|~t] t |
| |
| _[_ t, _, _ t|t] t |
| _[_ t, _, _ ~t|t] t |
| _[_ t, _, _ t|~t] t |
| _[_ t, _, _ ~t|~t] t |
| |
| _[_ t.t] t |
| _[_ ~t.t] t |
| _[_ t.t|t.t] t |
| _[_ ~t.t|t.t] t |
| _[_ t.t|~t.t] t |
| _[_ ~t.t|~t.t] t |
| |
| _[_ t, _, _ t.t|t.t] t |
| _[_ t, _, _ ~t.t|t.t] t |
| _[_ t, _, _ t.t|~t.t] t |
| _[_ t, _, _ ~t.t|~t.t] t |
| |
| _[_ struct{}] t |
| _[_ ~struct{}] t |
| |
| _[_ struct{}|t] t |
| _[_ ~struct{}|t] t |
| _[_ struct{}|~t] t |
| _[_ ~struct{}|~t] t |
| |
| _[_ t|struct{}] t |
| _[_ ~t|struct{}] t |
| _[_ t|~struct{}] t |
| _[_ ~t|~struct{}] t |
| ) |
| |
| // Single-expression type parameter lists and those that don't start |
| // with a (type parameter) name are considered array sizes. |
| // The term must be a valid expression (it could be a type incl. a |
| // tilde term) but the type-checker will complain. |
| type ( |
| _[t] t |
| _[t|t] t |
| |
| // These are invalid and the type-checker will complain. |
| _[~t] t |
| _[~t|t] t |
| _[t|~t] t |
| _[~t|~t] t |
| ) |
| |
| type _[_ t, t] /* ERROR "missing type constraint" */ t |
| type _[_ ~t, t] /* ERROR "missing type constraint" */ t |
| type _[_ t, ~ /* ERROR "missing type parameter name" */ t] t |
| type _[_ ~t, ~ /* ERROR "missing type parameter name" */ t] t |
| |
| type _[_ t|t, t /* ERROR "missing type parameter name" */ |t] t |
| type _[_ ~t|t, t /* ERROR "missing type parameter name" */ |t] t |
| type _[_ t|t, ~ /* ERROR "missing type parameter name" */ t|t] t |
| type _[_ ~t|t, ~ /* ERROR "missing type parameter name" */ t|t] t |
