69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
// Copyright 2019 Yan Yan
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef PARAMS_GRID_H_
|
|
#define PARAMS_GRID_H_
|
|
#include <tuple>
|
|
#include <vector>
|
|
|
|
namespace detail {
|
|
template <class T>
|
|
int getTotalSize(std::vector<T> arg) {
|
|
return arg.size();
|
|
}
|
|
|
|
template <class T, class... TArgs>
|
|
int getTotalSize(std::vector<T> arg, std::vector<TArgs>... args) {
|
|
return arg.size() * getTotalSize(args...);
|
|
}
|
|
template <typename T>
|
|
int getSize(std::vector<T> arg) {
|
|
return arg.size();
|
|
}
|
|
|
|
template <int Idx, class TT, class T>
|
|
void assigner(TT &src, std::vector<int> counter, std::vector<T> &arg) {
|
|
std::get<Idx>(src) = arg[counter[Idx]];
|
|
}
|
|
|
|
template <int Idx, class TT, class T, class... TArgs>
|
|
void assigner(TT &src, std::vector<int> counter, std::vector<T> &arg,
|
|
std::vector<TArgs> &... args) {
|
|
std::get<Idx>(src) = arg[counter[Idx]];
|
|
assigner<Idx + 1>(src, counter, args...);
|
|
}
|
|
} // namespace detail
|
|
template <class... TArgs>
|
|
std::vector<std::tuple<TArgs...>> paramsGrid(std::vector<TArgs>... args) {
|
|
int length = detail::getTotalSize(args...);
|
|
std::vector<int> sizes = {detail::getSize(args)...};
|
|
int size = sizes.size();
|
|
|
|
std::vector<std::tuple<TArgs...>> params(length);
|
|
std::vector<int> counter(size);
|
|
for (int i = 0; i < length; ++i) {
|
|
detail::assigner<0>(params[i], counter, args...);
|
|
counter[size - 1] += 1;
|
|
for (int c = size - 1; c >= 0; --c) {
|
|
if (counter[c] == sizes[c] && c > 0) {
|
|
counter[c - 1] += 1;
|
|
counter[c] = 0;
|
|
}
|
|
}
|
|
}
|
|
return params;
|
|
}
|
|
|
|
#endif
|