update error

Signed-off-by: Mamoru Sobue <[email protected]>

Author: soblin

common/autoware_trajectory/include/autoware/trajectory/interpolator/result.hpp

@@ -30,11 +30,8 @@ struct InterpolationFailure
   const std::string what;
 };
 
-inline InterpolationFailure operator+(
-  const InterpolationFailure & primary, const InterpolationFailure & nested)
-{
-  return InterpolationFailure{primary.what + " ==> " + nested.what};
-}
+InterpolationFailure operator+(
+  const InterpolationFailure & primary, const InterpolationFailure & nested);
 
 using InterpolationResult = tl::expected<InterpolationSuccess, InterpolationFailure>;
 

common/autoware_trajectory/src/interpolator/result.cpp

@@ -0,0 +1,31 @@
+// Copyright 2025 TIER IV, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "autoware/trajectory/interpolator/result.hpp"
+
+#include <iostream>
+#include <sstream>
+
+namespace autoware::trajectory::interpolator
+{
+
+InterpolationFailure operator+(
+  const InterpolationFailure & primary, const InterpolationFailure & nested)
+{
+  std::stringstream ss;
+  ss << primary.what << "." << std::endl << "\tReason: " << nested.what << std::endl;
+  return InterpolationFailure{ss.str()};
+}
+
+}  // namespace autoware::trajectory::interpolator

common/autoware_trajectory/src/trajectory_point.cpp

@@ -106,25 +106,25 @@ interpolator::InterpolationResult Trajectory<PointType>::build(
         bases_, std::move(longitudinal_velocity_mps_values));
       !result) {
     return tl::unexpected(interpolator::InterpolationFailure{
-      "failed to interpolate TrajectoryPoint::longitudinal_velocity_mps_values"});
+      "failed to interpolate TrajectoryPoint::longitudinal_velocity_mps"});
   }
   if (const auto result =
         this->lateral_velocity_mps().build(bases_, std::move(lateral_velocity_mps_values));
       !result) {
     return tl::unexpected(interpolator::InterpolationFailure{
-      "failed to interpolate TrajectoryPoint::lateral_velocity_mps_values"});
+      "failed to interpolate TrajectoryPoint::lateral_velocity_mps"});
   }
   if (const auto result =
         this->heading_rate_rps().build(bases_, std::move(heading_rate_rps_values));
       !result) {
     return tl::unexpected(interpolator::InterpolationFailure{
-      "failed to interpolate TrajectoryPoint::heading_rate_rps_values"});
+      "failed to interpolate TrajectoryPoint::heading_rate_rps"});
   }
   if (const auto result =
         this->acceleration_mps2().build(bases_, std::move(acceleration_mps2_values));
       !result) {
     return tl::unexpected(interpolator::InterpolationFailure{
-      "failed to interpolate TrajectoryPoint::acceleration_mps2_values"});
+      "failed to interpolate TrajectoryPoint::acceleration_mps2"});
   }
   if (const auto result =
         this->front_wheel_angle_rad().build(bases_, std::move(front_wheel_angle_rad_values));