src

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git clone git://code.dwrz.net/src
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sa4021.go (997B)

      1 package sa4021
      2 
      3 import (
      4 	"honnef.co/go/tools/analysis/code"
      5 	"honnef.co/go/tools/analysis/facts/generated"
      6 	"honnef.co/go/tools/analysis/lint"
      7 	"honnef.co/go/tools/analysis/report"
      8 	"honnef.co/go/tools/pattern"
      9 
     10 	"golang.org/x/tools/go/analysis"
     11 )
     12 
     13 var SCAnalyzer = lint.InitializeAnalyzer(&lint.Analyzer{
     14 	Analyzer: &analysis.Analyzer{
     15 		Name:     "SA4021",
     16 		Run:      run,
     17 		Requires: append([]*analysis.Analyzer{generated.Analyzer}, code.RequiredAnalyzers...),
     18 	},
     19 	Doc: &lint.RawDocumentation{
     20 		Title:    `\"x = append(y)\" is equivalent to \"x = y\"`,
     21 		Since:    "2019.2",
     22 		Severity: lint.SeverityWarning,
     23 		MergeIf:  lint.MergeIfAny,
     24 	},
     25 })
     26 
     27 var Analyzer = SCAnalyzer.Analyzer
     28 
     29 var checkSingleArgAppendQ = pattern.MustParse(`(CallExpr (Builtin "append") [_])`)
     30 
     31 func run(pass *analysis.Pass) (any, error) {
     32 	for node := range code.Matches(pass, checkSingleArgAppendQ) {
     33 		report.Report(pass, node, "x = append(y) is equivalent to x = y", report.FilterGenerated())
     34 	}
     35 	return nil, nil
     36 }