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#pragma once
#include <algorithm>
#include <map>
#include <set>
#include <string>
namespace cps {
inline unsigned char foldIdentifier(unsigned char C) {
return C >= 'A' && C <= 'Z' ? C + ('a' - 'A') : C;
}
struct IdentifierLess {
bool operator()(const std::string &A, const std::string &B) const {
return std::lexicographical_compare(A.begin(), A.end(), B.begin(), B.end(),
[](unsigned char L, unsigned char R) { return foldIdentifier(L) < foldIdentifier(R); });
}
};
inline bool sameIdentifier(const std::string &A, const std::string &B) {
return !IdentifierLess{}(A, B) && !IdentifierLess{}(B, A);
}
template<class T> using IdentifierMap = std::map<std::string, T, IdentifierLess>;
using IdentifierSet = std::set<std::string, IdentifierLess>;
} // namespace cps
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