forked from mgechev/revive
/
get-return.go
70 lines (56 loc) 路 1.29 KB
/
get-return.go
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package rule
import (
"fmt"
"go/ast"
"strings"
"github.com/mgechev/revive/lint"
)
// GetReturnRule lints given else constructs.
type GetReturnRule struct{}
// Apply applies the rule to given file.
func (*GetReturnRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
var failures []lint.Failure
onFailure := func(failure lint.Failure) {
failures = append(failures, failure)
}
w := lintReturnRule{onFailure}
ast.Walk(w, file.AST)
return failures
}
// Name returns the rule name.
func (*GetReturnRule) Name() string {
return "get-return"
}
type lintReturnRule struct {
onFailure func(lint.Failure)
}
func isGetter(name string) bool {
if strings.HasPrefix(strings.ToUpper(name), "GET") {
if len(name) > 3 {
c := name[3]
return !(c >= 'a' && c <= 'z')
}
}
return false
}
func hasResults(rs *ast.FieldList) bool {
return rs != nil && len(rs.List) > 0
}
func (w lintReturnRule) Visit(node ast.Node) ast.Visitor {
fd, ok := node.(*ast.FuncDecl)
if !ok {
return w
}
if !isGetter(fd.Name.Name) {
return w
}
if !hasResults(fd.Type.Results) {
w.onFailure(lint.Failure{
Confidence: 0.8,
Node: fd,
Category: "logic",
Failure: fmt.Sprintf("function '%s' seems to be a getter but it does not return any result", fd.Name.Name),
})
}
return w
}