Add staticcheck tool

vendor/honnef.co/go/tools/staticcheck/sa4022/sa4022.go

@@ -0,0 +1,40 @@
+package sa4022
+
+import (
+	"honnef.co/go/tools/analysis/code"
+	"honnef.co/go/tools/analysis/lint"
+	"honnef.co/go/tools/analysis/report"
+	"honnef.co/go/tools/pattern"
+
+	"golang.org/x/tools/go/analysis"
+)
+
+var SCAnalyzer = lint.InitializeAnalyzer(&lint.Analyzer{
+	Analyzer: &analysis.Analyzer{
+		Name:     "SA4022",
+		Run:      run,
+		Requires: code.RequiredAnalyzers,
+	},
+	Doc: &lint.RawDocumentation{
+		Title:    `Comparing the address of a variable against nil`,
+		Text:     `Code such as \"if &x == nil\" is meaningless, because taking the address of a variable always yields a non-nil pointer.`,
+		Since:    "2020.1",
+		Severity: lint.SeverityWarning,
+		MergeIf:  lint.MergeIfAny,
+	},
+})
+
+var Analyzer = SCAnalyzer.Analyzer
+
+var CheckAddressIsNilQ = pattern.MustParse(
+	`(BinaryExpr
+		(UnaryExpr "&" _)
+		(Or "==" "!=")
+		(Builtin "nil"))`)
+
+func run(pass *analysis.Pass) (any, error) {
+	for node := range code.Matches(pass, CheckAddressIsNilQ) {
+		report.Report(pass, node, "the address of a variable cannot be nil")
+	}
+	return nil, nil
+}