Skip to content
Documentation
API Reference
StrForeachReversePtrIdx

StrForeachReversePtrIdx

Description

Walk each character of str backward, binding chrptr to a pointer to the character at index idx from length - 1 down to 0. Both chrptr and idx are stamped by the macro. See VecForeachPtrReverseIdx for the full SUCCESS/FAILURE contract.

Usage example (Cross-references)

Usage examples (Cross-references) 
    // Test StrForeachReversePtrIdx macro
    bool test_str_foreach_reverse_ptr_idx(void) {
        WriteFmt("Testing StrForeachReversePtrIdx\n");
        DefaultAllocator alloc = DefaultAllocatorInit();
        Str result = StrInit(&alloc);
    
        StrForeachReversePtrIdx(&s, chrptr, idx) {
            // Append the character (via pointer) and its index to the result string
            StrAppendFmt(&result, "{c}{}", *chrptr, idx);
    // Make idx go out of bounds in StrForeachReversePtrIdx by modifying string during iteration
    bool test_str_foreach_reverse_ptr_idx_out_of_bounds_access(void) {
        WriteFmt("Testing StrForeachReversePtrIdx where idx goes out of bounds\n");
        DefaultAllocator alloc = DefaultAllocatorInit();
    
        // StrForeachReversePtrIdx (VecForeachPtrReverseIdx) has explicit bounds checking: if ((idx) >= (v)->length) LOG_FATAL(...)
        StrForeachReversePtrIdx(&s, chr_ptr, idx) {
            WriteFmt("Accessing idx {} (s.length={}): '{c}'\n", idx, StrLen(&s), *chr_ptr);
Last updated on
StrForeachReverseIdxStrFromF64