68 lines
1.3 KiB
Go
68 lines
1.3 KiB
Go
package rule
|
|
|
|
import (
|
|
"go/ast"
|
|
|
|
"github.com/mgechev/revive/lint"
|
|
)
|
|
|
|
// ConfusingResultsRule lints given function declarations
|
|
type ConfusingResultsRule struct{}
|
|
|
|
// Apply applies the rule to given file.
|
|
func (r *ConfusingResultsRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
|
|
var failures []lint.Failure
|
|
|
|
fileAst := file.AST
|
|
walker := lintConfusingResults{
|
|
onFailure: func(failure lint.Failure) {
|
|
failures = append(failures, failure)
|
|
},
|
|
}
|
|
|
|
ast.Walk(walker, fileAst)
|
|
|
|
return failures
|
|
}
|
|
|
|
// Name returns the rule name.
|
|
func (r *ConfusingResultsRule) Name() string {
|
|
return "confusing-results"
|
|
}
|
|
|
|
type lintConfusingResults struct {
|
|
onFailure func(lint.Failure)
|
|
}
|
|
|
|
func (w lintConfusingResults) Visit(n ast.Node) ast.Visitor {
|
|
fn, ok := n.(*ast.FuncDecl)
|
|
if !ok || fn.Type.Results == nil || len(fn.Type.Results.List) < 2 {
|
|
return w
|
|
}
|
|
lastType := ""
|
|
for _, result := range fn.Type.Results.List {
|
|
if len(result.Names) > 0 {
|
|
return w
|
|
}
|
|
|
|
t, ok := result.Type.(*ast.Ident)
|
|
if !ok {
|
|
return w
|
|
}
|
|
|
|
if t.Name == lastType {
|
|
w.onFailure(lint.Failure{
|
|
Node: n,
|
|
Confidence: 1,
|
|
Category: "naming",
|
|
Failure: "unnamed results of the same type may be confusing, consider using named results",
|
|
})
|
|
break
|
|
}
|
|
lastType = t.Name
|
|
|
|
}
|
|
|
|
return w
|
|
}
|