error:static_cast undeclared->Objective C

Question

I was porting from cpp to Objective C.

Objective C:

[pPacket SetHeaderSequenceNumber:static_cast<char>(m_transmitSequenceNumber + ASCII_ZERO)];

cpp:

pPacket->SetHeaderSequenceNumber(static_cast <char>(m_transmitSequenceNumber + ASCII_ZERO));

error:static_cast undeclared.

related: http://stackoverflow.com/questions/3147156/casting-comparison-between-objective-c-and-c — Mat, May 17 '11 at 12:57

score 9 · Accepted Answer · answered May 17 '11 at 12:56

9

objective-c is a superset of c, not c++ so static_cast is not supported in it. You can just use c-style cast:

[pPacket SetHeaderSequenceNumber:(char)(m_transmitSequenceNumber + ASCII_ZERO)];

answered May 17 '11 at 12:56

Vladimir

mmmmmm · Answer 2 · 2015-08-13T10:25:49.967

4

Objective C is a superset of C not C++. static_cast is a C++ operator so Objective C cannot use this.

However there is Objective C++ which does understand C++. To use this rename your .m file to .mm and Xcode will compile this as Objective C++

edited Aug 13 '15 at 10:25

answered May 17 '11 at 12:57

mmmmmm

2 Answers2