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map::operator[](k) is indeed equivalent to (*((this->insert(make_pair(k,mapped_type()))).first)).second
This commit is contained in:
Kartik K. Agaram 2017-11-19 03:24:54 -08:00
parent bc4d02c848
commit 82f3c320ea
1 changed files with 2 additions and 2 deletions
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001help.cc
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@ -220,8 +220,8 @@ template<typename T> typename T::mapped_type const& get(const T& map, typename T
}
template<typename T> typename T::mapped_type const& put(T& map, typename T::key_type const& key, typename T::mapped_type const& value) {
// requires value to have a zero-arg (default) constructor
map[key] = value;
return map[key];
(*((map.insert(std::make_pair(key, typename T::mapped_type()))).first)).second = value;
return (*((map.insert(std::make_pair(key, typename T::mapped_type()))).first)).second;
}
template<typename T> bool contains_key(T& map, typename T::key_type const& key) {
return map.find(key) != map.end();