misc-objective-cpp.mm

    template <class T>
    inline T* as(NSObject* o) {
        if ([o isKindOfClass: [T class]]) {
            return (T*)o;
        }
        return nil;
    }
    
    template <class T>
    inline bool is(NSObject* o) {
        if ([o isKindOfClass: [T class]]) {
            return true;
        }
        return false;
    }
    
    inline NSString* to_NSString(const CGRect& rect) {
        return NSStringFromCGRect(rect);
    }
    
    inline NSString* to_NSString(const CGPoint& point) {
        return NSStringFromCGPoint(point);
    }
    
    inline NSString* to_NSString(const std::string& text) {
        return [[NSString alloc] initWithBytes: text.c_str() length: text.size() encoding: NSUTF8StringEncoding];
    }
    
    inline NSString* to_NSStringView(const std::string& text) {
        return [[NSString alloc] initWithBytesNoCopy: const_cast<char*>(text.c_str()) length: text.size() encoding: NSUTF8StringEncoding freeWhenDone: NO];
    }
    
    inline NSString* to_NSString(const std::shared_ptr<std::string>& text) {
        if (!text) {
            return nil;
        }
        return to_NSString(*text);
    }
    
    inline std::string to_string(NSData* data) {
        auto result = std::string();
        result.resize(data.length);
        [data getBytes: const_cast<char*>(result.c_str()) length: result.size()];
        return result;
    }