Move all Firestore Objective-C to Objective-C++ (#734)

* Move all Firestore files to Objective-C++
* Update project file references
* Don't use module imports from Objective-C++
* Use extern "C" for C-accessible globals
* Work around more stringent type checking in Objective-C++
  * NSMutableDictionary ivars aren't implicitly casted to NSDictionary
  * FSTMaybeDocument callback can't be passed a function that accepts
    FSTDocument
  * NSComparisonResult can't be multiplied by -1 without casting
* Add a #include <inttypes.h> where needed
* Avoid using C++ keywords as variables
* Remove #if __cplusplus guards

1 files changed, 0 insertions, 80 deletions

diff --git a/Firestore/Source/Core/FSTSnapshotVersion.m b/Firestore/Source/Core/FSTSnapshotVersion.m
deleted file mode 100644
index 980ae52..0000000
--- a/Firestore/Source/Core/FSTSnapshotVersion.m
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * 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.
- */
-
-#import "Firestore/Source/Core/FSTSnapshotVersion.h"
-
-#import "Firestore/Source/Core/FSTTimestamp.h"
-
-NS_ASSUME_NONNULL_BEGIN
-
-@implementation FSTSnapshotVersion
-
-+ (instancetype)noVersion {
-  static FSTSnapshotVersion *min;
-  static dispatch_once_t onceToken;
-  dispatch_once(&onceToken, ^{
-    FSTTimestamp *timestamp = [[FSTTimestamp alloc] initWithSeconds:0 nanos:0];
-    min = [FSTSnapshotVersion versionWithTimestamp:timestamp];
-  });
-  return min;
-}
-
-+ (instancetype)versionWithTimestamp:(FSTTimestamp *)timestamp {
-  return [[FSTSnapshotVersion alloc] initWithTimestamp:timestamp];
-}
-
-- (instancetype)initWithTimestamp:(FSTTimestamp *)timestamp {
-  self = [super init];
-  if (self) {
-    _timestamp = timestamp;
-  }
-  return self;
-}
-
-#pragma mark - NSObject methods
-
-- (BOOL)isEqual:(id)object {
-  if (self == object) {
-    return YES;
-  }
-  if (![object isKindOfClass:[FSTSnapshotVersion class]]) {
-    return NO;
-  }
-  return [self.timestamp isEqual:((FSTSnapshotVersion *)object).timestamp];
-}
-
-- (NSUInteger)hash {
-  return self.timestamp.hash;
-}
-
-- (NSString *)description {
-  return [NSString stringWithFormat:@"<FSTSnapshotVersion: %@>", self.timestamp];
-}
-
-- (id)copyWithZone:(NSZone *_Nullable)zone {
-  // Implements NSCopying without actually copying because timestamps are immutable.
-  return self;
-}
-
-#pragma mark - Public methods
-
-- (NSComparisonResult)compare:(FSTSnapshotVersion *)other {
-  return [self.timestamp compare:other.timestamp];
-}
-
-@end
-
-NS_ASSUME_NONNULL_END