1 files changed, 76 insertions, 0 deletions
diff --git a/vendor/github.com/mgechev/revive/rule/empty-block.go b/vendor/github.com/mgechev/revive/rule/empty-block.go
new file mode 100644
index 0000000000..7861394b32
--- /dev/null
+++ b/vendor/github.com/mgechev/revive/rule/empty-block.go
@@ -0,0 +1,76 @@
+package rule
+
+import (
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// EmptyBlockRule lints given else constructs.
+type EmptyBlockRule struct{}
+
+// Apply applies the rule to given file.
+func (r *EmptyBlockRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
+	var failures []lint.Failure
+
+	onFailure := func(failure lint.Failure) {
+		failures = append(failures, failure)
+	}
+
+	w := lintEmptyBlock{make([]*ast.BlockStmt, 0), onFailure}
+	ast.Walk(w, file.AST)
+	return failures
+}
+
+// Name returns the rule name.
+func (r *EmptyBlockRule) Name() string {
+	return "empty-block"
+}
+
+type lintEmptyBlock struct {
+	ignore    []*ast.BlockStmt
+	onFailure func(lint.Failure)
+}
+
+func (w lintEmptyBlock) Visit(node ast.Node) ast.Visitor {
+	fd, ok := node.(*ast.FuncDecl)
+	if ok {
+		w.ignore = append(w.ignore, fd.Body)
+		return w
+	}
+
+	fl, ok := node.(*ast.FuncLit)
+	if ok {
+		w.ignore = append(w.ignore, fl.Body)
+		return w
+	}
+
+	block, ok := node.(*ast.BlockStmt)
+	if !ok {
+		return w
+	}
+
+	if mustIgnore(block, w.ignore) {
+		return w
+	}
+
+	if len(block.List) == 0 {
+		w.onFailure(lint.Failure{
+			Confidence: 1,
+			Node:       block,
+			Category:   "logic",
+			Failure:    "this block is empty, you can remove it",
+		})
+	}
+
+	return w
+}
+
+func mustIgnore(block *ast.BlockStmt, blackList []*ast.BlockStmt) bool {
+	for _, b := range blackList {
+		if b == block {
+			return true
+		}
+	}
+	return false
+}