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Improved 'map' interface on SemanticValues.

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yhirose 2015-03-05 22:00:18 -05:00
parent 81d7593ea1
commit 59f350673c
1 changed files with 6 additions and 12 deletions
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18
peglib.h
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@ -229,24 +229,18 @@ struct SemanticValues : protected std::vector<SemanticValue>
return r;
}
template <typename It, typename F>
auto map(It beg, It end, F f) const -> vector<typename std::remove_const<decltype(f(SemanticValue()))>::type> {
template <typename F>
auto map(size_t beg, size_t end, F f) const -> vector<typename std::remove_const<decltype(f(SemanticValue()))>::type> {
vector<typename std::remove_const<decltype(f(SemanticValue()))>::type> r;
auto it = beg;
while (it != end) {
r.push_back(f(*it));
++it;
end = std::min(end, size());
for (size_t i = beg; i < end; i++) {
r.push_back(f((*this)[i]));
}
return r;
}
template <typename T>
auto map() const -> vector<T> {
return this->map([](const SemanticValue& v) { return v.get<T>(); });
}
template <typename T, typename It>
auto map(It beg, It end) const -> vector<T> {
auto map(size_t beg = 0, size_t end = -1) const -> vector<T> {
return this->map(beg, end, [](const SemanticValue& v) { return v.get<T>(); });
}
};