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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SKSL_DFASTATE
#define SKSL_DFASTATE
#include "LexUtil.h"
struct DFAState {
struct Label {
std::vector<int> fStates;
Label(std::vector<int> states)
: fStates(std::move(states)) {}
bool operator==(const Label& other) const {
return fStates == other.fStates;
}
bool operator!=(const Label& other) const {
return !(*this == other);
}
std::string description() const {
std::string result = "<";
const char* separator = "";
for (int s : fStates) {
result += separator;
result += std::to_string(s);
separator = ", ";
}
result += ">";
return result;
}
};
DFAState()
: fId(INVALID)
, fLabel({}) {}
DFAState(int id, Label label)
: fId(id)
, fLabel(std::move(label)) {}
DFAState(const DFAState& other) = delete;
int fId;
Label fLabel;
bool fIsScanned = false;
};
namespace std {
template<> struct hash<DFAState::Label> {
size_t operator()(const DFAState::Label& s) const {
int result = 0;
for (int i : s.fStates) {
result = result * 101 + i;
}
return result;
}
};
} // namespace
#endif
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