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// Copyright 2023 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 stubmethods defines a code action for missing interface methods.
//
// # Analyzer stubmethods
//
// stubmethods: detect missing methods and fix with stub implementations
//
// This analyzer detects type-checking errors due to missing methods
// in assignments from concrete types to interface types, and offers
// a suggested fix that will create a set of stub methods so that
// the concrete type satisfies the interface.
//
// For example, this function will not compile because the value
// NegativeErr{} does not implement the "error" interface:
//
// func sqrt(x float64) (float64, error) {
// if x < 0 {
// return 0, NegativeErr{} // error: missing method
// }
// ...
// }
//
// type NegativeErr struct{}
//
// This analyzer will suggest a fix to declare this method:
//
// // Error implements error.Error.
// func (NegativeErr) Error() string {
// panic("unimplemented")
// }
//
// (At least, it appears to behave that way, but technically it
// doesn't use the SuggestedFix mechanism and the stub is created by
// logic in gopls's golang.stub function.)
package stubmethods
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