TUN-1734: Pin packages at exact versions

vendor/github.com/opentracing/opentracing-go/log/field.go

@@ -20,6 +20,7 @@ const (
 	errorType
 	objectType
 	lazyLoggerType
+	noopType
 )
 
 // Field instances are constructed via LogBool, LogString, and so on.
@@ -152,6 +153,25 @@ func Lazy(ll LazyLogger) Field {
 	}
 }
 
+// Noop creates a no-op log field that should be ignored by the tracer.
+// It can be used to capture optional fields, for example those that should
+// only be logged in non-production environment:
+//
+//     func customerField(order *Order) log.Field {
+//          if os.Getenv("ENVIRONMENT") == "dev" {
+//              return log.String("customer", order.Customer.ID)
+//          }
+//          return log.Noop()
+//     }
+//
+//     span.LogFields(log.String("event", "purchase"), customerField(order))
+//
+func Noop() Field {
+	return Field{
+		fieldType: noopType,
+	}
+}
+
 // Encoder allows access to the contents of a Field (via a call to
 // Field.Marshal).
 //
@@ -203,6 +223,8 @@ func (lf Field) Marshal(visitor Encoder) {
 		visitor.EmitObject(lf.key, lf.interfaceVal)
 	case lazyLoggerType:
 		visitor.EmitLazyLogger(lf.interfaceVal.(LazyLogger))
+	case noopType:
+		// intentionally left blank
 	}
 }
 
@@ -234,6 +256,8 @@ func (lf Field) Value() interface{} {
 		return math.Float64frombits(uint64(lf.numericVal))
 	case errorType, objectType, lazyLoggerType:
 		return lf.interfaceVal
+	case noopType:
+		return nil
 	default:
 		return nil
 	}