74 lines
1.4 KiB
Go
74 lines
1.4 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/config"
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)
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const OperationCheck = "operation"
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type OperationAnalyzer struct {
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pass *analysis.Pass
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config *config.Config
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}
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func NewOperationAnalyzer(pass *analysis.Pass, config *config.Config) *OperationAnalyzer {
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return &OperationAnalyzer{
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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 *OperationAnalyzer) NodeFilter() []ast.Node {
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return []ast.Node{
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(*ast.AssignStmt)(nil),
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}
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}
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func (a *OperationAnalyzer) Check(n ast.Node) {
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stmt, ok := n.(*ast.AssignStmt)
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if !ok {
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return
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}
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for _, expr := range stmt.Rhs {
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switch x := expr.(type) {
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case *ast.BinaryExpr:
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switch xExpr := x.X.(type) {
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case *ast.BinaryExpr:
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a.checkBinaryExpr(xExpr)
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}
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switch yExpr := x.Y.(type) {
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case *ast.BinaryExpr:
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a.checkBinaryExpr(yExpr)
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}
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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 *OperationAnalyzer) 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, OperationCheck)
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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, OperationCheck)
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}
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}
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}
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func (a *OperationAnalyzer) 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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