typedef

How to use typedef in dynamic properties?

It's the first time I'm trying to use typedef. Admittedly I don't have a very clear idea of what's going on but my understanding was that the values inside typedef get assigned integers starting with 0. I've tried to use them as integers but I get various warnings and errors. One of them is "[NSCFNumber objectForKey:]: unrecognized selec...

What does "typedef void (*Something)()" mean

I am trying to understand what this means, the code I am looking at has in .h typedef void (*MCB)(); static MCB m_process; in .C MCB Modes::m_process = NULL; And sometimes when I do m_process(); I get segmentations fault, it's probably because the memory was freed, how can I debug when it gets freed? I hope my questions ar...

Struct containing pointers to itself

I am writing a LinkedList in C, the below code represent my Node definition. typedef struct { int value; struct Node* next; struct Node* prev; } Node; I understand (or think that I do) that struct Node not the same as typedef struct Node. Granted my code compiles and runs as it's supposed to, however, I get a lot of warnin...

What does this mean: "error: invalid combination of multiple type-specifiers"

I'm getting a compiler error on FreeBSD: error: invalid combination of multiple type-specifiers From the C++ Code: typedef unsigned off_t uoff_t; Not sure what the gcc compiler is trying to tell me. ...

Typedef enum setting and accessing

Hello there! I have this before the interface declaration in my MainView.h header. typedef enum { UNKNOWN, CLEAR, NIGHT_CLEAR, CLOUDY, NIGHT_CLOUDY } Weather; Then I declared it like this: Weather weather; Then made an accessor: @property Weather weather; And synthesized it. My question is, how can I use this in a different...

Application crashes after trying to set typedef enum

Hello there! I had asked a question similar to this before, but I have a new problem with it so I've reposted part of the question. I have this before the interface declaration in my MainView.h header. typedef enum { UNKNOWN, CLEAR, NIGHT_CLEAR, CLOUDY, NIGHT_CLOUDY } Weather; Then I declared it (in my MainView) like this: Weather...

std::map with typedef type in it?

Is it a good idea to do the following in C++: typedef std::map<std::string, boost::any> MyVals; // Is the following typedef'd type inside a map a good idea? typedef std::map<std::string, MyVals> TagValues; These maps will be used a lot for sequential insertion and removal. ...