Add staticcheck tool

vendor/honnef.co/go/tools/simple/s1010/s1010.go

@@ -0,0 +1,44 @@
+package s1010
+
+import (
+	"go/ast"
+
+	"honnef.co/go/tools/analysis/code"
+	"honnef.co/go/tools/analysis/edit"
+	"honnef.co/go/tools/analysis/facts/generated"
+	"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:     "S1010",
+		Run:      run,
+		Requires: append([]*analysis.Analyzer{generated.Analyzer}, code.RequiredAnalyzers...),
+	},
+	Doc: &lint.RawDocumentation{
+		Title: `Omit default slice index`,
+		Text: `When slicing, the second index defaults to the length of the value,
+making \'s[n:len(s)]\' and \'s[n:]\' equivalent.`,
+		Since:   "2017.1",
+		MergeIf: lint.MergeIfAny,
+	},
+})
+
+var Analyzer = SCAnalyzer.Analyzer
+
+var checkSlicingQ = pattern.MustParse(`(SliceExpr x@(Object _) low (CallExpr (Builtin "len") [x]) nil)`)
+
+func run(pass *analysis.Pass) (any, error) {
+	for node := range code.Matches(pass, checkSlicingQ) {
+		expr := node.(*ast.SliceExpr)
+		report.Report(pass, expr.High,
+			"should omit second index in slice, s[a:len(s)] is identical to s[a:]",
+			report.FilterGenerated(),
+			report.Fixes(edit.Fix("Simplify slice expression", edit.Delete(expr.High))))
+	}
+	return nil, nil
+}