text: /*
   * Copyright 2021-2022 Hewlett Packard Enterprise Development LP
   * Other additional copyright holders may be indicated within.
   *
   * The entirety of this work is 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 "chpl/uast/Implements.h"
  
  #include "chpl/uast/Builder.h"
  
  namespace chpl {
  namespace uast {
  
  
  UniqueString Implements::interfaceName() const {
    auto expr = interfaceExpr();
    assert(expr);
  
    if (auto ident = expr->toIdentifier()) {
      return ident->name();
    } else if (auto call = expr->toFnCall()) {
      auto called = call->calledExpression();
      assert(called && called->isIdentifier());
      auto ret = called->toIdentifier()->name();
      return ret;
    } else {
      assert(false && "Not possible!");
      UniqueString empty;
      return empty;
    }
  }
  
  owned<Implements>
  Implements::build(Builder* builder, Location loc,
                    owned<Identifier> typeExpr,
                    owned<AstNode> interfaceExpr,
                    bool isExpressionLevel) {
    AstList children;
    int8_t typeExprChildNum = AstNode::NO_CHILD;
  
    if (typeExpr.get() != nullptr) {
      typeExprChildNum = children.size();
      children.push_back(std::move(typeExpr));
    }
  
    assert(interfaceExpr.get() != nullptr);
    assert(interfaceExpr->isIdentifier() || interfaceExpr->isFnCall());
    children.push_back(std::move(interfaceExpr));
  
    Implements* ret = new Implements(std::move(children), typeExprChildNum,
                                     isExpressionLevel);
    builder->noteLocation(ret, loc);
    return toOwned(ret);
  }
  
  
  } // namespace uast
  } // namespace chpl
  