library/cpp/string_utils/scan/scan.h


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#pragma once 
 
#include <util/generic/strbuf.h> 
 
template <bool addAll, char sep, char sepKeyVal, class F>
static inline void ScanKeyValue(TStringBuf s, F&& f) { 
    TStringBuf key, val;
 
    while (!s.empty()) {
        val = s.NextTok(sep);
 
        if (val.empty()) {
            continue; // && case
        } 
 
        key = val.NextTok(sepKeyVal);
 
        if (addAll || val.IsInited()) { 
            f(key, val); // includes empty keys
        } 
    } 
}