CODEWITHSUNDEEP
iosobjective-cswiftxcode
mentoxska
mentoxska

Reputation: 135

Error : Expected identifier or '(' after usage of old Objective C library in Swift project through bridging header

I have quite low experience with Objective C as I started learning iOS development using Swift and I need to use a older ObjC library.

My netsdk.h library (file has over 50k lines)

#ifndef DHNETSDK_H
#define DHNETSDK_H

#if (defined(WIN32) || defined(_WIN32) || defined(_WIN64))

   ... 
#else    //non-windows

    #define CLIENT_NET_API extern "C"
    #define CALL_METHOD 
    #define CALLBACK
    ...

Basically after reading some problems related to this one I think there is problem with extern "C" on the next line 

...
#define CLIENT_NET_API extern "C"
...

Due to this I am getting errors on many lines that use CLIENT_NET_API like 

expected identifier or '('
Expanded from macro 'CLIENT_NET_API'

My first try was to wrap #define CLIENT_NET_API extern "C" into 

#ifdef __cplusplus
extern "C" {
#endif

#define CLIENT_NET_API 

#ifdef __cplusplus
}
#endif

but then I am getting error "C does not support default arguments" on all lines using CLIENT_NET_API for example these

CLIENT_NET_API BOOL CALL_METHOD CLIENT_StartBackUpCase(LLONG lLoginID, const NET_IN_START_CASE_BACK_UP* pstInParam, NET_OUT_START_CASE_BACK_UP *pstOutParam, int nWaitTime = NET_INTERFACE_DEFAULT_TIMEOUT);

CLIENT_NET_API BOOL CALL_METHOD CLIENT_StopBackUpCase(LLONG lLoginID, const NET_IN_STOP_CASE_BACK_UP* pstInParam, NET_OUT_STOP_CASE_BACK_UP *pstOutParam, int nWaitTime = NET_INTERFACE_DEFAULT_TIMEOUT);

I think it should be wrapped in some other way but I couldn't find a example with #define and extern keywords on the same line

Upvotes: 1

Views: 450

Answers (2)

ankb
ankb

Reputation: 1

I used file.mm to #import "netsdk.h" instead of file.m. Problem solved

Upvotes: -1

Vyacheslav
Vyacheslav

Reputation: 27211

In this case:

define CLIENT_NET_API extern "C"

Says, let CLIENT_NET_API be extern "C"

So, in your case you just define as empty existed preprocessor variable

#ifdef __cplusplus
extern "C" {
#endif

#define CLIENT_NET_API 

#ifdef __cplusplus
}
#endif

Upvotes: 1

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