1 files changed, 68 insertions, 0 deletions
diff --git a/vendor/github.com/mgechev/revive/rule/function-result-limit.go b/vendor/github.com/mgechev/revive/rule/function-result-limit.go
new file mode 100644
index 0000000000..1850fc4194
--- /dev/null
+++ b/vendor/github.com/mgechev/revive/rule/function-result-limit.go
@@ -0,0 +1,68 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// FunctionResultsLimitRule lints given else constructs.
+type FunctionResultsLimitRule struct{}
+
+// Apply applies the rule to given file.
+func (r *FunctionResultsLimitRule) Apply(file *lint.File, arguments lint.Arguments) []lint.Failure {
+	if len(arguments) != 1 {
+		panic(`invalid configuration for "function-result-limit"`)
+	}
+
+	max, ok := arguments[0].(int64) // Alt. non panicking version
+	if !ok {
+		panic(fmt.Sprintf(`invalid value passed as return results number to the "function-result-limit" rule; need int64 but got %T`, arguments[0]))
+	}
+	if max < 0 {
+		panic(`the value passed as return results number to the "function-result-limit" rule cannot be negative`)
+	}
+
+	var failures []lint.Failure
+
+	walker := lintFunctionResultsNum{
+		max: int(max),
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, file.AST)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *FunctionResultsLimitRule) Name() string {
+	return "function-result-limit"
+}
+
+type lintFunctionResultsNum struct {
+	max       int
+	onFailure func(lint.Failure)
+}
+
+func (w lintFunctionResultsNum) Visit(n ast.Node) ast.Visitor {
+	node, ok := n.(*ast.FuncDecl)
+	if ok {
+		num := 0
+		if node.Type.Results != nil {
+			num = node.Type.Results.NumFields()
+		}
+		if num > w.max {
+			w.onFailure(lint.Failure{
+				Confidence: 1,
+				Failure:    fmt.Sprintf("maximum number of return results per function exceeded; max %d but got %d", w.max, num),
+				Node:       node.Type,
+			})
+			return w
+		}
+	}
+	return w
+}