69 lines
1.3 KiB
Go
69 lines
1.3 KiB
Go
package checks
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import (
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"go/ast"
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"go/token"
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"golang.org/x/tools/go/analysis"
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config "github.com/tommy-muehle/go-mnd/v2/config"
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)
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const CaseCheck = "case"
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type CaseAnalyzer struct {
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pass *analysis.Pass
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config *config.Config
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}
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func NewCaseAnalyzer(pass *analysis.Pass, config *config.Config) *CaseAnalyzer {
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return &CaseAnalyzer{
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pass: pass,
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config: config,
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}
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}
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func (a *CaseAnalyzer) NodeFilter() []ast.Node {
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return []ast.Node{
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(*ast.CaseClause)(nil),
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}
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}
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func (a *CaseAnalyzer) Check(n ast.Node) {
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caseClause, ok := n.(*ast.CaseClause)
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if !ok {
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return
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}
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for _, c := range caseClause.List {
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switch x := c.(type) {
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case *ast.BasicLit:
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if a.isMagicNumber(x) {
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a.pass.Reportf(x.Pos(), reportMsg, x.Value, CaseCheck)
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}
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case *ast.BinaryExpr:
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a.checkBinaryExpr(x)
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}
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}
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}
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func (a *CaseAnalyzer) checkBinaryExpr(expr *ast.BinaryExpr) {
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switch x := expr.X.(type) {
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case *ast.BasicLit:
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if a.isMagicNumber(x) {
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a.pass.Reportf(x.Pos(), reportMsg, x.Value, CaseCheck)
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}
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}
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switch y := expr.Y.(type) {
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case *ast.BasicLit:
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if a.isMagicNumber(y) {
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a.pass.Reportf(y.Pos(), reportMsg, y.Value, CaseCheck)
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}
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}
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}
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func (a *CaseAnalyzer) isMagicNumber(l *ast.BasicLit) bool {
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return (l.Kind == token.FLOAT || l.Kind == token.INT) && !a.config.IsIgnoredNumber(l.Value)
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}
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