text: // Copyright 2020 The Tint Authors.
  //
  // 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 "src/tint/ast/builtin.h"
  
  namespace tint::ast {
  
  std::ostream& operator<<(std::ostream& out, Builtin builtin) {
      switch (builtin) {
          case Builtin::kNone: {
              out << "none";
              break;
          }
          case Builtin::kPosition: {
              out << "position";
              break;
          }
          case Builtin::kVertexIndex: {
              out << "vertex_index";
              break;
          }
          case Builtin::kInstanceIndex: {
              out << "instance_index";
              break;
          }
          case Builtin::kFrontFacing: {
              out << "front_facing";
              break;
          }
          case Builtin::kFragDepth: {
              out << "frag_depth";
              break;
          }
          case Builtin::kLocalInvocationId: {
              out << "local_invocation_id";
              break;
          }
          case Builtin::kLocalInvocationIndex: {
              out << "local_invocation_index";
              break;
          }
          case Builtin::kGlobalInvocationId: {
              out << "global_invocation_id";
              break;
          }
          case Builtin::kWorkgroupId: {
              out << "workgroup_id";
              break;
          }
          case Builtin::kNumWorkgroups: {
              out << "num_workgroups";
              break;
          }
          case Builtin::kSampleIndex: {
              out << "sample_index";
              break;
          }
          case Builtin::kSampleMask: {
              out << "sample_mask";
              break;
          }
          case Builtin::kPointSize: {
              out << "pointsize";
          }
      }
      return out;
  }
  
  }  // namespace tint::ast
  