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      1 /*
      2  * Copyright (C) 2018 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef LAYOUT_VALIDATION_H_
     18 #define LAYOUT_VALIDATION_H_
     19 
     20 #include "dex_builder.h"
     21 
     22 #include <string>
     23 
     24 namespace startop {
     25 
     26 // This visitor determines whether a layout can be compiled. Since we do not currently support all
     27 // features, such as includes and merges, we need to pre-validate the layout before we start
     28 // compiling.
     29 class LayoutValidationVisitor {
     30  public:
     31   void VisitStartDocument() const {}
     32   void VisitEndDocument() const {}
     33   void VisitStartTag(const std::u16string& name);
     34   void VisitEndTag() const {}
     35 
     36   const std::string& message() const { return message_; }
     37   bool can_compile() const { return can_compile_; }
     38 
     39  private:
     40   std::string message_{"Okay"};
     41   bool can_compile_{true};
     42 };
     43 
     44 }  // namespace startop
     45 
     46 #endif  // LAYOUT_VALIDATION_H_
     47