Test library github.com/gomodule/redigo/redis

vendor/github.com/gomodule/redigo/redis/reflect_go117.go

@@ -0,0 +1,34 @@
+//go:build !go1.18
+// +build !go1.18
+
+package redis
+
+import (
+	"errors"
+	"reflect"
+)
+
+// fieldByIndexErr returns the nested field corresponding to index.
+// It returns an error if evaluation requires stepping through a nil
+// pointer, but panics if it must step through a field that
+// is not a struct.
+func fieldByIndexErr(v reflect.Value, index []int) (reflect.Value, error) {
+	if len(index) == 1 {
+		return v.Field(index[0]), nil
+	}
+
+	mustBe(v, reflect.Struct)
+	for i, x := range index {
+		if i > 0 {
+			if v.Kind() == reflect.Ptr && v.Type().Elem().Kind() == reflect.Struct {
+				if v.IsNil() {
+					return reflect.Value{}, errors.New("reflect: indirection through nil pointer to embedded struct field " + v.Type().Elem().Name())
+				}
+				v = v.Elem()
+			}
+		}
+		v = v.Field(x)
+	}
+
+	return v, nil
+}