回答編集履歴
1
修正
test
CHANGED
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@@ -5,6 +5,8 @@
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#include <iostream>
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#include <vector>
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+
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9
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+
#include <memory>
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@@ -34,27 +36,25 @@
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int main() {
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-
std::vector<Base
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+
std::vector<std::unique_ptr<Base>> vec;
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vec.push_back(ne
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+
vec.push_back(std::make_unique<Base>());
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-
vec.push_back(ne
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+
vec.push_back(std::make_unique<Derived>());
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-
vec.push_back(ne
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+
vec.push_back(std::make_unique<Base>());
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-
vec.push_back(ne
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+
vec.push_back(std::make_unique<Derived>());
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-
for (
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for ( auto& item : vec ) {
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-
Derived* der = dynamic_cast<Derived*>(item);
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+
Derived* der = dynamic_cast<Derived*>(item.get());
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if ( der ) { der->derived_fn(); }
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else { item->base_fn(); }
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-
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-
delete item;
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}
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