C++ Accessing define macros data

Question

I have a C++ header file that has a definition like this...

#define TEMP {0x04,0x06,0xAA,0xBF ...}

How do I access that data in my C++ program?

For example? Let's say I wanted to capture the single byte?

How can I assign a variable of type uint8_t named x to the third byte in the TEMP structure?

uint8_t x = TEMP[2]; ?

Answer 1

Macro is simply pasted in source code on compilation.

So, you can do something like this:

char tmp[] = TEMP; // which expands to 'char tmp[] = {0x04, 0x06, ...}'

and then you work with it, like with usual array.

Answer 2

keep an array like this

uint8_t temp[] = TEMP;

which will expand to

uint8_t temp = {0x04,0x06,0xAA,0xBF};

then you can access the third value like this

uint8_t x = temp[2];

Answer 3

uint8_t x = std::vector<uint8_t>(TEMP)[2]; works but inelegantly.