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typedef enum with binary definitions error (IAR 8.40)

When developing the firmware for STM32 in IAR, I encountered the following:

typedef enum ll{
  A = 0b00000000000000000000000000000000,
  B = 0b00000000000000000000000000000011,
} lol;

Error[Pe067]: expected a "}" PROJ\Core\Src\main.c 72 (2d line)

But,

typedef enum ll{
  A = 0x00000000,
  B = 0x11111111,
} lol;

is compile successfully. I know all of this code work in another IDE n compilers. But what happens in my case? Why number with 0b brings errors? Maybe needed set some configure for compiler?

Solution

  • Binary literals (i.e. integers with the 0b prefix, such as 0b010101) are not part of the (standard) C language. However, they are part of C++ (since C++14), and some compilers (notably GCC) support them as an extension in C.