// returned by valfunc parameterized by arg. The invocation of valfunc to update the
// current value is, for each p,
//
//	sym = valfunc(func, p, 0, arg);
//	record sym.P as value at p->pc;
//	sym = valfunc(func, p, 1, arg);
//
// where func is the function, val is the current value, p is the instruction being
// considered, and arg can be used to further parameterize valfunc.

	"golang.org/x/tools/internal/typeparams"
)

//go:embed doc.go
var doc string

var Analyzer = &analysis.Analyzer{
	Name:     "nilfunc",
	Doc:      analysisutil.MustExtractDoc(doc, "nilfunc"),
	URL:      "https://pkg.go.dev/golang.org/x/tools/go/analysis/passes/nilfunc",
	Requires: []*analysis.Analyzer{inspect.Analyzer},
	Run:      run,
}

func run(pass *analysis.Pass) (interface{}, error) {

// Copyright 2013 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 nilfunc

func F() {}

func Comparison() {
	if F == nil { // ERROR "comparison of function F == nil is always false"
		panic("can't happen")
	}

}

-- bar/bar.go --
package bar

import "example/foo"

func BarFunc() int {
	return foo.FooFunc2()
}

-- bar/bar_test.go --
package bar_test

import (
	"example/bar"
	"testing"
)

func TestBar(t *testing.T) {
	if bar.BarFunc() != 42 {
		t.Fatalf("bad")
	}
}

-- baz/baz.go --
package baz

func BazFunc() int {
	return -42

// otherwise `nil`.
type removeFromFIFOFunc func() *request

// walkFunc is called for each request in the list in the
// oldest -> newest order.
// ok: if walkFunc returns false then the iteration stops immediately.
// walkFunc may remove the given request from the fifo,
// but may not mutate the fifo in any othe way.
type walkFunc func(*request) (ok bool)

// Internal interface to abstract out the implementation details

	undLowerIgnoreSigma transform.SpanningTransformer = &undLowerIgnoreSigmaCaser{}

	lowerFunc = []mapFunc{
		nil,       // und
		nil,       // af
		aztrLower, // az
		nil,       // el
		ltLower,   // lt
		nil,       // nl
		aztrLower, // tr
	}

	titleInfos = []struct {
		title     mapFunc
		lower     mapFunc
		titleSpan spanFunc
		rewrite   func(*context)
	}{

// license that can be found in the LICENSE file.

// Package nilfunc defines an Analyzer that checks for useless
// comparisons against nil.
//
// # Analyzer nilfunc
//
// nilfunc: check for useless comparisons between functions and nil
//
// A useless comparison is one like f == nil as opposed to f() == nil.

//   - callback walkFunc is invoked on root directory after visiting children dirs and files
func walkDeep(root string, walkFunc filepath.WalkFunc) error {
	info, err := os.Lstat(root)
	if err != nil {
		return walkFunc(root, nil, err)
	}
	return walk(root, info, walkFunc)
}

func walk(path string, info os.FileInfo, walkFunc filepath.WalkFunc) error {
	if !info.IsDir() {

	//  "iss": "******@****.***",
	//  "nested": {
	//    "key2": "valueC",
	//    "nested-2": {
	//      "key2": "valueC"
	//    }
	//  },
	//  "sub": "sub-1"
	// }
	// Generated by: security/tools/jwt/samples/gen-jwt.py tests/common/jwt/key.pem -jwks=tests/common/jwt/jwks.json
	// --expire=3153600000 --iss=******@****.*** --sub=sub-1 --nestedclaim key2 valueC
	// nolint: lll

// Copyright 2018 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 copylock

import "sync"

func BadFunc() {
	var x *sync.Mutex
	p := x
	var y sync.Mutex
	p = &y
	*p = *x // ERROR "assignment copies lock value to \*p: sync.Mutex"