text: /*
   * Copyright 2017 Google
   *
   * 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 <Foundation/Foundation.h>
  
  NS_ASSUME_NONNULL_BEGIN
  
  /** Helper for creating a general exception for invalid usage of an API. */
  NSException *FSTInvalidUsage(NSString *exceptionName, NSString *format, ...);
  
  /**
   * Macro to throw exceptions in response to API usage errors. Avoids the lint warning you usually
   * get when using @throw and (unlike a function) doesn't trigger warnings about not all codepaths
   * returning a value.
   *
   * Exceptions should only be used for programmer errors made by consumers of the SDK, e.g.
   * invalid method arguments.
   *
   * For recoverable runtime errors, use NSError**.
   * For internal programming errors, use FSTFail().
   */
  #define FSTThrowInvalidUsage(exceptionName, format, ...)          \
    do {                                                            \
      @throw FSTInvalidUsage(exceptionName, format, ##__VA_ARGS__); \
    } while (0)
  
  #define FSTThrowInvalidArgument(format, ...)                                       \
    do {                                                                             \
      @throw FSTInvalidUsage(@"FIRInvalidArgumentException", format, ##__VA_ARGS__); \
    } while (0)
  
  NS_ASSUME_NONNULL_END
  