| // 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. |
| |
| package typeparams |
| |
| import "fmt" |
| |
| type T[P any] int |
| |
| func (T[_]) Scan(x fmt.ScanState, c byte) {} // want `should have signature Scan\(fmt\.ScanState, rune\) error` |
| |
| func (T[_]) Format(fmt.State, byte) {} // want `should have signature Format\(fmt.State, rune\)` |
| |
| type U[P any] int |
| |
| func (U[_]) Format(byte) {} // no error: first parameter must be fmt.State to trigger check |
| |
| func (U[P]) GobDecode(P) {} // want `should have signature GobDecode\(\[\]byte\) error` |
| |
| type V[P any] int // V does not implement error. |
| |
| func (V[_]) As() T[int] { return 0 } // ok - V is not an error |
| func (V[_]) Is() bool { return false } // ok - V is not an error |
| func (V[_]) Unwrap() int { return 0 } // ok - V is not an error |
| |
| type E[P any] int |
| |
| func (E[_]) Error() string { return "" } // E implements error. |
| |
| func (E[P]) As() {} // want `method As\(\) should have signature As\((any|interface\{\})\) bool` |
| func (E[_]) Is() {} // want `method Is\(\) should have signature Is\(error\) bool` |
| func (E[_]) Unwrap() {} // want `method Unwrap\(\) should have signature Unwrap\(\) error` |
| |
| type F[P any] int |
| |
| func (F[_]) Error() string { return "" } // Both F and *F implement error. |
| |
| func (*F[_]) As() {} // want `method As\(\) should have signature As\((any|interface\{\})\) bool` |
| func (*F[_]) Is() {} // want `method Is\(\) should have signature Is\(error\) bool` |
| func (*F[_]) Unwrap() {} // want `method Unwrap\(\) should have signature Unwrap\(\) error` |
