iterators.h

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#define ITER_LOOP(ITER_TYPE, ITER_NAME, VALUE_TYPE, VALUE_NAME)                                    \
    for (VALUE_TYPE VALUE_NAME;                                                                    \
         (!ITER_TYPE##_empty(&ITER_NAME) ? (VALUE_NAME = ITER_TYPE##_next(&ITER_NAME), true)       \
                                         : false);)
 
#define ITER_ENUMERATE_LOOP(ITER_TYPE, ITER_NAME, VALUE_TYPE, VALUE_NAME, COUNTER_TYPE,            \
                            COUNTER_NAME)                                                          \
    COUNTER_TYPE COUNTER_NAME = 0;                                                                 \
    for (VALUE_TYPE VALUE_NAME;                                                                    \
         (!ITER_TYPE##_empty(&ITER_NAME) ? (VALUE_NAME = ITER_TYPE##_next(&ITER_NAME), true)       \
                                         : false);                                                 \
         COUNTER_NAME++)