| // 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 - and then |
| // a type-checker will complain - but we don't allow ~ in the expr). |
| // TODO(rfindley): Improve error recover here. In these cases go/parser error |
| // recovery is worse than cmd/compile/internal/syntax, and unnecessary type |
| // declarations had to be inserted to force synchronization. |
| type _[t] t |
| type _[~ /* ERROR "expected operand" */ t] t |
| type /* ERROR "expected ']'" */ Sync int // placeholder to synchronize the parser |
| type _[t|t] t |
| type _[~ /* ERROR "expected operand" */ t|t] t |
| type /* ERROR "expected ']'" */ Sync int // placeholder to synchronize the parser |
| type _[t| ~ /* ERROR "expected operand" */ t] t |
| type /* ERROR "expected ']'" */ Sync int // placeholder to synchronize the parser |
| type _[~ /* ERROR "expected operand" */ t|~t] t |
| type /* ERROR "expected ']'" */ Sync int // placeholder to synchronize the parser |
| |
| type _[_ t, t /* ERROR "type parameters must be named" */ ] t |
| type _[_ ~t, t /* ERROR "type parameters must be named" */ ] t |
| type _[_ t, ~ /* ERROR "type parameters must be named" */ t] t |
| type _[_ ~t, ~ /* ERROR "type parameters must be named" */ t] t |
| |
| type _[_ t|t, t /* ERROR "type parameters must be named" */ |t] t |
| type _[_ ~t|t, t /* ERROR "type parameters must be named" */ |t] t |
| type _[_ t|t, ~ /* ERROR "type parameters must be named" */ t|t] t |
| type _[_ ~t|t, ~ /* ERROR "type parameters must be named" */ t|t] t |