text: // Copyright 2020 Agnesoft
  //
  // 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.
  
  import { typeExists } from "./analyzer_common.js";
  
  export function analyzeVariant(node, ast) {
      for (const variant of node["variants"]) {
          if (!typeExists(variant, ast)) {
              throw `Analyzer: unknown type '${variant}' used as a variant of '${node["name"]}'.`;
          }
      }
  
      node["functions"] = {
          index: {
              type: "function",
              name: "Index",
              arguments: [],
              body: [],
              returnValue: "Byte",
          },
      };
  
      return node;
  }
  