/*
 * Copyright 2016 WebAssembly Community Group participants
 *
 * 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.
 */

#ifndef wasm_ast_utils_h
#define wasm_ast_utils_h

#include "wasm.h"

namespace wasm {

struct BreakSeeker : public WasmWalker<BreakSeeker> {
  Name target; // look for this one
  size_t found;

  BreakSeeker(Name target) : target(target), found(false) {}

  void visitBreak(Break *curr) {
    if (curr->name == target) found++;
  }

  static bool has(Expression* tree, Name target) {
    BreakSeeker breakSeeker(target);
    breakSeeker.walk(tree);
    return breakSeeker.found > 0;
  }
};

} // namespace wasm

#endif // wasm_ast_utils_h