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