xtd 0.2.0
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format_enum_class_flags_without_helper.cpp

Show how to use format xtd::format class with enum classes flags without helper.

#include <xtd/as>
#include <xtd/console>
#include <xtd/enum_class>
#include <xtd/environment>
#include <xtd/string>
using namespace xtd;
enum class text_styles {
normal = 0b0,
bold = 0b1,
italic = 0b10,
underline = 0b100,
strikeout = 0b1000,
};
// Add text_style enum class flags bitwise operators
text_styles operator|(text_styles lhs, text_styles rhs) {return as<text_styles>(as<int>(lhs) | as<int>(rhs));}
// This operator is needed to register flags attribute.
template<> struct xtd::enum_set_attribute<text_styles> {
explicit operator auto() const noexcept {return xtd::enum_attribute::flags;}
};
// This operator is needed for text_styles enum class to be recognized by xtd::string::format().
template<> struct xtd::enum_register<text_styles> {
explicit operator auto() const noexcept {return xtd::enum_collection<text_styles> {{text_styles::normal, "normal"}, {text_styles::bold, "bold"}, {text_styles::italic, "italic"}, {text_styles::underline, "underline"}, {text_styles::strikeout, "strikeout"}};}
};
auto main() -> int {
console::out << string::format("{}", text_styles::bold | text_styles::italic) << environment::new_line;
console::out << string::format("0b{:b}", text_styles::bold | text_styles::italic) << environment::new_line;
console::out << string::format("0b{:B}", text_styles::bold | text_styles::italic) << environment::new_line;
console::out << string::format("{:d}", text_styles::bold | text_styles::italic) << environment::new_line;
console::out << string::format("{:D}", text_styles::bold | text_styles::italic) << environment::new_line;
console::out << string::format("{:g}", text_styles::bold | text_styles::italic) << environment::new_line;
console::out << string::format("{:G}", text_styles::bold | text_styles::italic) << environment::new_line;
console::out << string::format("0{:o}", text_styles::bold | text_styles::italic) << environment::new_line;
console::out << string::format("0{:O}", text_styles::bold | text_styles::italic) << environment::new_line;
console::out << string::format("0x{:x}", text_styles::bold | text_styles::italic) << environment::new_line;
console::out << string::format("0x{:X}", text_styles::bold | text_styles::italic) << environment::new_line;
}
// This code produces the following output :
//
// saturday
// 0b101
// 0b101
// 5
// 5
// saturday
// saturday
// 05
// 05
// 0x5
// 0x5
std::vector< xtd::collections::generic::key_value_pair< enum_t, xtd::string > > enum_collection
Represents a pair of an enum_t value and a string of an enum of type enum_t.
Definition enum_collection.h:22
@ flags
Enum flags attribute.
The xtd namespace contains all fundamental classes to access Hardware, Os, System,...
Definition xtd_about_box.h:10
Provides the registration struct for enumerations.
Definition enum_register.h:38
Provides the set attribute struct for enumerations.
Definition enum_set_attribute.h:31