| // Copyright 2020 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. |
| |
| // Examples adjusted to match new [T any] syntax for type parameters. |
| // Also, previously permitted empty type parameter lists and instantiations |
| // are now syntax errors. |
| |
| package p |
| |
| // crash 1 |
| type nt1[_ any]interface{g /* ERROR "undefined" */ } |
| type ph1[e nt1[e],g(d /* ERROR "undefined" */ )]s /* ERROR "undefined" */ |
| func(*ph1[e,e /* ERROR "redeclared" */ ])h(d /* ERROR "undefined" */ ) |
| |
| // crash 2 |
| // Disabled: empty []'s are now syntax errors. This example leads to too many follow-on errors. |
| // type Numeric2 interface{t2 /* ERROR "not a type" */ } |
| // func t2[T Numeric2](s[]T){0 /* ERROR "not a type */ []{s /* ERROR cannot index" */ [0][0]}} |
| |
| // crash 3 |
| type t3 *interface{ t3.p /* ERROR "t3.p is not a type" */ } |
| |
| // crash 4 |
| type Numeric4 interface{t4 /* ERROR "not a type" */ } |
| func t4[T Numeric4](s[]T){if( /* ERROR "non-boolean" */ 0){*s /* ERROR "cannot indirect" */ [0]}} |
| |
| // crash 7 |
| type foo7 interface { bar() } |
| type x7[A any] struct{ foo7 } |
| func main7() { var _ foo7 = x7[int]{} } |
| |
| // crash 8 |
| type foo8[A any] interface { ~A /* ERROR "cannot be a type parameter" */ } |
| func bar8[A foo8[A]](a A) {} |
| |
| // crash 9 |
| type foo9[A any] interface { foo9 /* ERROR "invalid recursive type" */ [A] } |
| func _() { var _ = new(foo9[int]) } |
| |
| // crash 12 |
| var u /* ERROR "cycle" */ , i [func /* ERROR "used as value" */ /* ERROR "used as value" */ (u, c /* ERROR "undefined" */ /* ERROR "undefined" */ ) {}(0, len /* ERROR "must be called" */ /* ERROR "must be called" */ )]c /* ERROR "undefined" */ /* ERROR "undefined" */ |
| |
| // crash 15 |
| func y15() { var a /* ERROR "declared and not used" */ interface{ p() } = G15[string]{} } |
| type G15[X any] s /* ERROR "undefined" */ |
| func (G15 /* ERRORx `generic type .* without instantiation` */ ) p() |
| |
| // crash 16 |
| type Foo16[T any] r16 /* ERROR "not a type" */ |
| func r16[T any]() Foo16[Foo16[T]] { panic(0) } |
| |
| // crash 17 |
| type Y17 interface{ c() } |
| type Z17 interface { |
| c() Y17 |
| Y17 /* ERROR "duplicate method" */ |
| } |
| func F17[T Z17](T) {} |
| |
| // crash 18 |
| type o18[T any] []func(_ o18[[]_ /* ERROR "cannot use _" */ ]) |
| |
| // crash 19 |
| type Z19 [][[]Z19{}[0][0]]c19 /* ERROR "undefined" */ |
| |
| // crash 20 |
| type Z20 /* ERROR "invalid recursive type" */ interface{ Z20 } |
| func F20[t Z20]() { F20(t /* ERROR "invalid composite literal type" */ {}) } |
| |
| // crash 21 |
| type Z21 /* ERROR "invalid recursive type" */ interface{ Z21 } |
| func F21[T Z21]() { ( /* ERROR "not used" */ F21[Z21]) } |
| |
| // crash 24 |
| type T24[P any] P // ERROR "cannot use a type parameter as RHS in type declaration" |
| func (r T24[P]) m() { T24 /* ERROR "without instantiation" */ .m() } |
| |
| // crash 25 |
| type T25[A any] int |
| func (t T25[A]) m1() {} |
| var x T25 /* ERROR "without instantiation" */ .m1 |
| |
| // crash 26 |
| type T26 = interface{ F26[ /* ERROR "interface method must have no type parameters" */ Z any]() } |
| func F26[Z any]() T26 { return F26[] /* ERROR "operand" */ } |
| |
| // crash 27 |
| func e27[T any]() interface{ x27 /* ERROR "not a type" */ } { panic(0) } |
| func x27() { e27 /* ERROR "cannot infer T" */ () } |