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Complete FMT_VARIADIC.
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parent
9c8db26457
commit
428d114766
51
format.h
51
format.h
@ -855,6 +855,7 @@ inline StrFormatSpec<wchar_t> pad(
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return StrFormatSpec<wchar_t>(str, width, fill);
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return StrFormatSpec<wchar_t>(str, width, fill);
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}
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}
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// An argument list.
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class ArgList {
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class ArgList {
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private:
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private:
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const internal::ArgInfo *args_;
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const internal::ArgInfo *args_;
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@ -2170,6 +2171,8 @@ inline void FormatDec(char *&buffer, T value) {
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#if FMT_GCC_VERSION
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#if FMT_GCC_VERSION
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// Use the system_header pragma to suppress warnings about variadic macros
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// Use the system_header pragma to suppress warnings about variadic macros
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// because suppressing -Wvariadic-macros with the diagnostic pragma doesn't work.
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// because suppressing -Wvariadic-macros with the diagnostic pragma doesn't work.
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// It is used at the end because we want to suppress as little warnings as
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// possible.
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# pragma GCC system_header
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# pragma GCC system_header
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#endif
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#endif
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@ -2191,7 +2194,35 @@ inline void FormatDec(char *&buffer, T value) {
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#define FMT_ADD_ARG_NAME(type, index) type arg##index
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#define FMT_ADD_ARG_NAME(type, index) type arg##index
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#define FMT_GET_ARG_NAME(type, index) arg##index
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#define FMT_GET_ARG_NAME(type, index) arg##index
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#define FMT_MAKE_ARG2(arg, index) fmt::Writer::MakeArg(arg)
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#if FMT_USE_VARIADIC_TEMPLATES
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/**
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Defines a variadic function with the specified return type and argument
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types passed as variable arguments.
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Example::
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std::string FormatMessage(int id, const char *format,
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const fmt::ArgList &args) {
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fmt::Writer w;
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w.format("[{}] ", id);
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w.format(format, args);
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return w.str();
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}
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FMT_VARIADIC(std::string, FormatMessage, int, const char *)
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*/
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# define FMT_VARIADIC(return_type, func, ...) \
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template<typename... Args> \
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return_type func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
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const Args & ... args) { \
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enum {N = fmt::internal::NonZero<sizeof...(Args)>::VALUE}; \
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const fmt::internal::ArgInfo array[N] = {fmt::Writer::MakeArg(args)...}; \
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return func(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), \
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fmt::ArgList(array, sizeof...(Args))); \
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}
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#else
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// Defines a wrapper for a function taking __VA_ARGS__ arguments
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// Defines a wrapper for a function taking __VA_ARGS__ arguments
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// and n additional arguments of arbitrary types.
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// and n additional arguments of arbitrary types.
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@ -2204,21 +2235,9 @@ inline void FormatDec(char *&buffer, T value) {
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fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
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fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
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}
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}
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// Defines a variadic function with the specified return type and argument
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# define FMT_VARIADIC(return_type, func, ...) \
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// types passed as variable arguments.
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// Example:
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// std::string FormatMessage(const char *format, int id,
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// const fmt::ArgList &args) {
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// fmt::Writer w;
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// w.format("[{}] ", id);
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// w.format(format, args);
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// return w.str();
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// }
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// FMT_VARIADIC(std::string, FormatMessage, int, const char *)
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#define FMT_VARIADIC(return_type, func, ...) \
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inline return_type func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__)) { \
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inline return_type func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__)) { \
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return func(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), \
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return func(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), fmt::ArgList()); \
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fmt::ArgList()); \
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} \
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} \
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FMT_WRAP(return_type, func, 1, __VA_ARGS__) \
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FMT_WRAP(return_type, func, 1, __VA_ARGS__) \
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FMT_WRAP(return_type, func, 2, __VA_ARGS__) \
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FMT_WRAP(return_type, func, 2, __VA_ARGS__) \
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@ -2231,6 +2250,8 @@ inline void FormatDec(char *&buffer, T value) {
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FMT_WRAP(return_type, func, 9, __VA_ARGS__) \
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FMT_WRAP(return_type, func, 9, __VA_ARGS__) \
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FMT_WRAP(return_type, func, 10, __VA_ARGS__)
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FMT_WRAP(return_type, func, 10, __VA_ARGS__)
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#endif // FMT_USE_VARIADIC_TEMPLATES
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// Restore warnings.
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// Restore warnings.
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#if FMT_GCC_VERSION >= 406
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#if FMT_GCC_VERSION >= 406
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# pragma GCC diagnostic pop
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# pragma GCC diagnostic pop
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