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// 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.
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
// test cases for issue #49175
_[_ []t]t
_[_ [1]t]t
_[_ ~[]t]t
_[_ ~[1]t]t
t [ /* ERROR type parameters must be named */ t[0]]t
)
// test cases for issue #49174
func _[_ t]() {}
func _[_ []t]() {}
func _[_ [1]t]() {}
func _[_ []t | t]() {}
func _[_ [1]t | t]() {}
func _[_ t | []t]() {}
func _[_ []t | []t]() {}
func _[_ [1]t | [1]t]() {}
func _[_ t[t] | t[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
_[_ ~t, t /* ERROR missing type constraint */ ] t
_[_ t, /* ERROR type parameters must be named */ ~t] t
_[_ ~t, /* ERROR type parameters must be named */ ~t] t
_[_ t|t, /* ERROR type parameters must be named */ t|t] t
_[_ ~t|t, /* ERROR type parameters must be named */ t|t] t
_[_ t|t, /* ERROR type parameters must be named */ ~t|t] t
_[_ ~t|t, /* ERROR type parameters must be named */ ~t|t] t
)
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