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, 98 insertions, 0 deletions

diff --git a/Firestore/Source/Local/FSTQueryData.mm b/Firestore/Source/Local/FSTQueryData.mm
new file mode 100644
index 0000000..6bb716a
--- /dev/null
+++ b/Firestore/Source/Local/FSTQueryData.mm
@@ -0,0 +1,98 @@
+/*
+ * 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/Local/FSTQueryData.h"
+
+#import "Firestore/Source/Core/FSTQuery.h"
+#import "Firestore/Source/Core/FSTSnapshotVersion.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@implementation FSTQueryData
+
+- (instancetype)initWithQuery:(FSTQuery *)query
+                     targetID:(FSTTargetID)targetID
+         listenSequenceNumber:(FSTListenSequenceNumber)sequenceNumber
+                      purpose:(FSTQueryPurpose)purpose
+              snapshotVersion:(FSTSnapshotVersion *)snapshotVersion
+                  resumeToken:(NSData *)resumeToken {
+  self = [super init];
+  if (self) {
+    _query = query;
+    _targetID = targetID;
+    _sequenceNumber = sequenceNumber;
+    _purpose = purpose;
+    _snapshotVersion = snapshotVersion;
+    _resumeToken = [resumeToken copy];
+  }
+  return self;
+}
+
+- (instancetype)initWithQuery:(FSTQuery *)query
+                     targetID:(FSTTargetID)targetID
+         listenSequenceNumber:(FSTListenSequenceNumber)sequenceNumber
+                      purpose:(FSTQueryPurpose)purpose {
+  return [self initWithQuery:query
+                    targetID:targetID
+        listenSequenceNumber:sequenceNumber
+                     purpose:purpose
+             snapshotVersion:[FSTSnapshotVersion noVersion]
+                 resumeToken:[NSData data]];
+}
+
+- (BOOL)isEqual:(id)object {
+  if (self == object) {
+    return YES;
+  }
+  if (![object isKindOfClass:[FSTQueryData class]]) {
+    return NO;
+  }
+
+  FSTQueryData *other = (FSTQueryData *)object;
+  return [self.query isEqual:other.query] && self.targetID == other.targetID &&
+         self.purpose == other.purpose && [self.snapshotVersion isEqual:other.snapshotVersion] &&
+         [self.resumeToken isEqual:other.resumeToken];
+}
+
+- (NSUInteger)hash {
+  NSUInteger result = [self.query hash];
+  result = result * 31 + self.targetID;
+  result = result * 31 + self.purpose;
+  result = result * 31 + [self.snapshotVersion hash];
+  result = result * 31 + [self.resumeToken hash];
+  return result;
+}
+
+- (NSString *)description {
+  return [NSString
+      stringWithFormat:@"<FSTQueryData: query:%@ target:%d purpose:%lu version:%@ resumeToken:%@)>",
+                       self.query, self.targetID, (unsigned long)self.purpose, self.snapshotVersion,
+                       self.resumeToken];
+}
+
+- (instancetype)queryDataByReplacingSnapshotVersion:(FSTSnapshotVersion *)snapshotVersion
+                                        resumeToken:(NSData *)resumeToken {
+  return [[FSTQueryData alloc] initWithQuery:self.query
+                                    targetID:self.targetID
+                        listenSequenceNumber:self.sequenceNumber
+                                     purpose:self.purpose
+                             snapshotVersion:snapshotVersion
+                                 resumeToken:resumeToken];
+}
+
+@end
+
+NS_ASSUME_NONNULL_END