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feat: keep only 1 scanner in a cache

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while parsing, thread_local cache will not use scanners constructed from
multiple toml::spec. we don't need to keep multiple scanners
This commit is contained in:
ToruNiina
2025-02-13 20:57:07 +09:00
parent 17c5599ad6
commit c4637a4222
1 changed files with 5 additions and 11 deletions
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16
include/toml11/impl/syntax_impl.hpp
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@@ -21,27 +21,21 @@ struct syntax_cache
static_assert(std::is_base_of<scanner_base, value_type>::value, ""); static_assert(std::is_base_of<scanner_base, value_type>::value, "");
explicit syntax_cache(F f) explicit syntax_cache(F f)
: func_(std::move(f)), cache_{} : func_(std::move(f)), cache_(cxx::make_nullopt())
{} {}
value_type const& at(const spec& s) value_type const& at(const spec& s)
{ {
const auto found = std::find_if(cache_.begin(), cache_.end(), if( ! this->cache_.has_value() || this->cache_.value().first != s)
[&s](const std::pair<spec, value_type>& kv) { return kv.first == s; });
if(found == cache_.end())
{ {
this->cache_.emplace_back(s, func_(s)); this->cache_ = std::make_pair(s, func_(s));
return cache_.back().second;
}
else
{
return found->second;
} }
return this->cache_.value().second;
} }
private: private:
F func_; F func_;
std::vector<std::pair<spec, value_type>> cache_; cxx::optional<std::pair<spec, value_type>> cache_;
}; };
template<typename F> template<typename F>