Enforcing 'this parameter must not be nil' by using NSCParameterAssert()

AFNetworking/AFHTTPClient.h

@@ -131,7 +131,7 @@ typedef enum {
 /**
  Creates and initializes an `AFHTTPClient` object with the specified base URL.
  
- @param url The base URL for the HTTP client. This argument must not be nil.
+ @param url The base URL for the HTTP client. This argument must not be `nil`.
   
  @return The newly-initialized HTTP client
  */
@@ -510,7 +510,7 @@ extern NSTimeInterval const kAFUploadStream3GSuggestedDelay;
 /**
  Appends the HTTP header `Content-Disposition: file; filename=#{generated filename}; name=#{name}"` and `Content-Type: #{generated mimeType}`, followed by the encoded file data and the multipart form boundary.
  
- @param fileURL The URL corresponding to the file whose content will be appended to the form.
+ @param fileURL The URL corresponding to the file whose content will be appended to the form. This parameter must not be `nil`.
  @param name The name to be associated with the specified data. This parameter must not be `nil`.
  @param error If an error occurs, upon return contains an `NSError` object that describes the problem.
  
@@ -527,8 +527,8 @@ extern NSTimeInterval const kAFUploadStream3GSuggestedDelay;
  
  @param data The data to be encoded and appended to the form data.
  @param name The name to be associated with the specified data. This parameter must not be `nil`.
- @param mimeType The MIME type of the specified data. (For example, the MIME type for a JPEG image is image/jpeg.) For a list of valid MIME types, see http://www.iana.org/assignments/media-types/. This parameter must not be `nil`.
  @param filename The filename to be associated with the specified data. This parameter must not be `nil`.
+ @param mimeType The MIME type of the specified data. (For example, the MIME type for a JPEG image is image/jpeg.) For a list of valid MIME types, see http://www.iana.org/assignments/media-types/. This parameter must not be `nil`.
  */
 - (void)appendPartWithFileData:(NSData *)data
                           name:(NSString *)name

AFNetworking/AFHTTPClient.m

@@ -231,14 +231,12 @@ static NSString * AFPropertyListStringFromParameters(NSDictionary *parameters) {
 }
 
 - (id)initWithBaseURL:(NSURL *)url {
+    NSCParameterAssert(url);
+
     self = [super init];
     if (!self) {
         return nil;
     }
-	
-	if (!url) {
-		[NSException raise:@"-[AFHTTPClient initWithBaseURL:] nil URL" format:@"`url` must not be nil"];
-	}
     
     // Ensure terminal slash for baseURL path, so that NSURL +URLWithString:relativeToURL: works as expected
     if ([[url path] length] > 0 && ![[url absoluteString] hasSuffix:@"/"]) {
@@ -781,6 +779,9 @@ NSTimeInterval const kAFUploadStream3GSuggestedDelay = 0.2;
                          name:(NSString *)name
                         error:(NSError * __autoreleasing *)error
 {
+    NSCParameterAssert(fileURL);
+    NSCParameterAssert(name);
+    
     if (![fileURL isFileURL]) {
         NSDictionary *userInfo = [NSDictionary dictionaryWithObject:NSLocalizedString(@"Expected URL to be a file URL", nil) forKey:NSLocalizedFailureReasonErrorKey];
         if (error != NULL) {
@@ -819,6 +820,10 @@ NSTimeInterval const kAFUploadStream3GSuggestedDelay = 0.2;
                       fileName:(NSString *)fileName
                       mimeType:(NSString *)mimeType
 {
+    NSCParameterAssert(name);
+    NSCParameterAssert(fileName);
+    NSCParameterAssert(mimeType);
+
     NSMutableDictionary *mutableHeaders = [NSMutableDictionary dictionary];
     [mutableHeaders setValue:[NSString stringWithFormat:@"form-data; name=\"%@\"; filename=\"%@\"", name, fileName] forKey:@"Content-Disposition"];
     [mutableHeaders setValue:mimeType forKey:@"Content-Type"];
@@ -829,6 +834,8 @@ NSTimeInterval const kAFUploadStream3GSuggestedDelay = 0.2;
 - (void)appendPartWithFormData:(NSData *)data
                           name:(NSString *)name
 {
+    NSCParameterAssert(name);
+
     NSMutableDictionary *mutableHeaders = [NSMutableDictionary dictionary];
     [mutableHeaders setValue:[NSString stringWithFormat:@"form-data; name=\"%@\"", name] forKey:@"Content-Disposition"];