reproducer of https://bugs.webkit.org/show_bug.cgi?id=188678#c19

optionset.cpp

// reproducer of https://bugs.webkit.org/show_bug.cgi?id=188678#c19
#include <initializer_list>

template<typename T> class OptionSet {
public:
    constexpr OptionSet() = default;

    constexpr OptionSet(std::initializer_list<T> initializerList)
    {
        for (auto& option : initializerList) {
        }
    }

    constexpr bool containsAny(OptionSet optionSet) const
    {
        return false;
    }
};

enum TextCheckingType {
    Quote,
};

void foo()
{
    OptionSet<TextCheckingType> textCheckingOptions;
    const bool shouldPerformReplacement = textCheckingOptions.containsAny({ TextCheckingType::Quote });
}