xtd 0.2.0
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format_optional.cpp

Show how to use format xtd::format class with std::optional.

#include <xtd/xtd>
auto main() -> int {
console::out << format("{}", optional<string> {"string value"}) << environment::new_line;
console::out << format("{}", optional<string> {"string value"}.value()) << environment::new_line;
console::out << format("{}", optional<string> {}.value_or("fallback string")) << environment::new_line;
console::out << format("{}", optional<string> {}) << environment::new_line;
console::out << format("{}", nullopt) << environment::new_line;
}
// This code produces the following output :
//
// (string value)
// string value
// fallback string
// (null)
// (null)