Function StrCmp

inst/include/Rcpp/internal/NAComparator.h:30–35

namespace internal {

inline int StrCmp(SEXP x, SEXP y) {
    if (x == NA_STRING) return (y == NA_STRING ? 0 : 1);
    if (y == NA_STRING) return -1;
    if (x == y) return 0;  // same string in cache
    return strcmp(char_nocheck(x), char_nocheck(y));
}

template <typename T>
struct NAComparator {