Whither bool?

[craigmeister]

"bool" is listed as a keyword, but I get an error when I use it. Compiler does not recognize "boolean" as a declaration either.

[borris]

I'd sure like to use it. Does it do anything other than being a reserved keyword?

[dejan.odabasic]

Hello,

Since C99 bool is reserved keyword in C programming language, but it's not implemented as a variable type in mikroC PRO.
As you many know Boolean variable type requires additional library.
#include <stdbool.h>

I suggest that you use bit variable instead.
The mikroC PRO for ... compiler provides a bit data type that may be used for variable declarations. It can not be used for argument lists, and function-return values.

Note :
Bit variables can not be initialized.
Bit variables can not be members of structures and unions.
Bit variables do not have addresses, therefore unary operator & (address of) is not applicable to these variables.

Best regards.

[borris]

bit type is great and I use it alot, however, I need to use them as members of union and structs. I've been using this:

Code: Select all

typedef enum ebool { FALSE, TRUE } boolean

Works most of the time, but not a ideal solution.

[dejan.odabasic]

Hello,

using the (unsigned) char variable (which holds only 0 or 1) as members of union and structures usually is not too "expensive".

Since byte is the smallest addressable unit of memory. Multiple bits placed into a byte requires additional bit-shift operations which makes the bool an inefficient variable type to be implemented.

Best regards.

[public2010]

"bool" is listed as a keyword, but I get an error when I use it. Compiler does not recognize "boolean" as a declaration either.

Hi, I know it's been about 9 years since your intervention, but now I've found that the bool function only works in a custom "void", it doesn't work in void main.
Probably a bug in the mikroC for AVR compiler !!!