handling_errors.c

How to handle recoverable errors using bj_error.

How to handle recoverable errors using bj_error.

#include <banjo/error.h>
#include <banjo/main.h>
#include <banjo/log.h>
 
#define CODE 101

void function_returning_error(bj_error** error) {
    bj_set_error(error, CODE, "An error occured");
}
 
void function_calling_failing_function(bj_error** error) {
    bj_error* sub_err = 0;
 
    function_returning_error(&sub_err);
 
    if(sub_err != 0) {
        bj_forward_error(sub_err, error);
        return;
    }
 
    bj_info("This should not be printed\n");
}
 
 
int main(int argc, char* argv[]) {
    (void)argc;
    (void)argv;
 
    // If you are not interested by an error, pass 0 to the bj_error* pointer:
    function_returning_error(0);

    bj_error* error = 0;
 
    function_returning_error(&error);
 
    if(error != 0) {
        bj_info("There was an error");
    }
    
    if (bj_error_check(error, CODE)) {
        bj_info("Error domain and code match");
    }
 
    bj_clear_error(&error);
 
    function_calling_failing_function(&error);
 
    if (bj_error_check(error, CODE)) {
        bj_info("Error from nested function");
    }
 
    return 0;
}