Fix SFINAE bug in container base type #890
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niermann999
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krasznaa
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stephenswat
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This commit fixes a bug in the use of SFINAE in the container base type. In particuler, this issue has three layers: 1. The existing code uses the `typename = std::enable_if` anti-pattern which is discouraged in the C++ standard. 2. The code used `std::enable_if` without getting `::type` from it, meaning that a specialization failure cannot ever occur, rendering the SFINAE useless. 3. The check used about type equality is incorrect, it should rather check constructability. This commit fixes the issues by converting the code to a C++20 requires clause and by modifying the conditions.
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This commit fixes a bug in the use of SFINAE in the container base type. In particuler, this issue has three layers:
typename = std::enable_ifanti-pattern which is discouraged in the C++ standard.std::enable_ifwithout getting::typefrom it, meaning that a specialization failure cannot ever occur, rendering the SFINAE useless.This commit fixes the issues by converting the code to a C++20 requires clause and by modifying the conditions.