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Emulate variadic functions on older compilers.
This commit is contained in:
Victor Zverovich
parent
2f752abe97
commit
ef34eb6ec2
152
format.h
152
format.h
@ -119,6 +119,14 @@
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TypeName(const TypeName&); \
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void operator=(const TypeName&)
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#ifdef __GNUC__
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# define FMT_DEPRECATED(func) func __attribute__((deprecated))
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#elif defined(_MSC_VER)
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# define FMT_DEPRECATED(func) __declspec(deprecated) func
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#else
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# define FMT_DEPRECATED(func) func
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#endif
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#if FMT_MSC_VER
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# pragma warning(push)
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# pragma warning(disable: 4521) // 'class' : multiple copy constructors specified
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@ -864,34 +872,47 @@ public:
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}
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};
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// Generates a comma-separated list by applying f to numbers 1..n.
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#define FMT_GEN(n, f) FMT_GEN##n(f)
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#define FMT_GEN1(f) f(1)
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#define FMT_GEN2(f) FMT_GEN1(f), f(2)
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#define FMT_GEN3(f) FMT_GEN2(f), f(3)
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#define FMT_GEN4(f) FMT_GEN3(f), f(4)
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#define FMT_GEN5(f) FMT_GEN4(f), f(5)
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#define FMT_GEN6(f) FMT_GEN5(f), f(6)
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#define FMT_GEN7(f) FMT_GEN6(f), f(7)
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#define FMT_GEN8(f) FMT_GEN7(f), f(8)
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#define FMT_GEN9(f) FMT_GEN8(f), f(9)
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#if FMT_USE_VARIADIC_TEMPLATES
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// Defines a variadic function returning void.
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# define FMT_VARIADIC_VOID(func, arg_type) \
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template<typename... Args> \
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void func(arg_type arg1, const Args & ... args) { \
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const BasicArg<> \
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arg_array[fmt::internal::NonZero<sizeof...(Args)>::VALUE] = {args...}; \
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func(arg1, ArgList(arg_array, sizeof...(Args))); \
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}
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#else
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// Generates a comma-separated list with results of applying f to numbers 1..n.
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# define FMT_GEN(n, f) FMT_GEN##n(f)
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# define FMT_GEN1(f) f(1)
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# define FMT_GEN2(f) FMT_GEN1(f), f(2)
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# define FMT_GEN3(f) FMT_GEN2(f), f(3)
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# define FMT_GEN4(f) FMT_GEN3(f), f(4)
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# define FMT_GEN5(f) FMT_GEN4(f), f(5)
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# define FMT_GEN6(f) FMT_GEN5(f), f(6)
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# define FMT_GEN7(f) FMT_GEN6(f), f(7)
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# define FMT_GEN8(f) FMT_GEN7(f), f(8)
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# define FMT_GEN9(f) FMT_GEN8(f), f(9)
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#define FMT_MAKE_TEMPLATE_ARG(n) typename T##n
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#define FMT_MAKE_ARG(n) const T##n &v##n
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#define FMT_MAKE_REF(n) MakeArg(v##n)
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# define FMT_MAKE_TEMPLATE_ARG(n) typename T##n
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# define FMT_MAKE_ARG(n) const T##n &v##n
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# define FMT_MAKE_REF(n) fmt::Writer::MakeArg(v##n)
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#define FMT_TEMPLATE(func_name, n) \
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# define FMT_TEMPLATE(func, arg_type, n) \
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template <FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \
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inline void func_name(BasicStringRef<Char> format, FMT_GEN(n, FMT_MAKE_ARG)) { \
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inline void func(arg_type arg1, FMT_GEN(n, FMT_MAKE_ARG)) { \
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const fmt::internal::ArgInfo args[] = {FMT_GEN(n, FMT_MAKE_REF)}; \
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func_name(format, fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
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func(arg1, fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
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}
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// Defines a variadic function returning void.
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#define FMT_VARIADIC_VOID(func_name) \
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FMT_TEMPLATE(format, 1) FMT_TEMPLATE(format, 2) FMT_TEMPLATE(format, 3) \
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FMT_TEMPLATE(format, 4) FMT_TEMPLATE(format, 5) FMT_TEMPLATE(format, 6) \
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FMT_TEMPLATE(format, 7) FMT_TEMPLATE(format, 8) FMT_TEMPLATE(format, 9)
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// Emulates a variadic function returning void on a pre-C++11 compiler.
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# define FMT_VARIADIC_VOID(func, arg_type) \
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FMT_TEMPLATE(func, arg_type, 1) FMT_TEMPLATE(func, arg_type, 2) \
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FMT_TEMPLATE(func, arg_type, 3) FMT_TEMPLATE(func, arg_type, 4) \
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FMT_TEMPLATE(func, arg_type, 5) FMT_TEMPLATE(func, arg_type, 6) \
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FMT_TEMPLATE(func, arg_type, 7) FMT_TEMPLATE(func, arg_type, 8) \
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FMT_TEMPLATE(func, arg_type, 9)
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#endif
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/**
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\rst
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@ -1204,13 +1225,39 @@ class BasicWriter {
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return std::basic_string<Char>(&buffer_[0], buffer_.size());
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}
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/**
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\rst
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Formats a string sending the output to the writer. This function
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takes variable number of arguments.
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**Example**::
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Writer out;
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out.format("Current point:\n");
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out.format("({:+f}, {:+f})", -3.14, 3.14);
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This will write the following output to the ``out`` object:
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.. code-block:: none
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Current point:
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(-3.140000, +3.140000)
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The output can be accessed using :meth:`data`, :meth:`c_str` or :meth:`str`
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methods.
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See also `Format String Syntax`_.
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\endrst
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*/
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inline void format(BasicStringRef<Char> format, const ArgList &args) {
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FormatParser().Format(*this, format, args);
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}
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FMT_VARIADIC_VOID(format, fmt::BasicStringRef<Char>)
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inline void printf(BasicStringRef<Char> format, const ArgList &args) {
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PrintfParser().Format(*this, format, args);
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}
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FMT_VARIADIC_VOID(printf, fmt::BasicStringRef<Char>)
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/**
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\rst
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@ -1240,47 +1287,9 @@ class BasicWriter {
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BasicFormatter<Char> Format(StringRef format);
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#if FMT_USE_VARIADIC_TEMPLATES
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/**
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\rst
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Formats a string sending the output to the writer.
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This version of the Format method uses C++11 features such as
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variadic templates and rvalue references. For C++98 version, see
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the overload taking a single ``StringRef`` argument above.
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**Example**::
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Writer out;
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out.Format("Current point:\n");
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out.Format("({:+f}, {:+f})", -3.14, 3.14);
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This will write the following output to the ``out`` object:
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.. code-block:: none
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Current point:
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(-3.140000, +3.140000)
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The output can be accessed using :meth:`data`, :meth:`c_str` or :meth:`str`
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methods.
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See also `Format String Syntax`_.
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\endrst
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*/
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// This function is deprecated, use Writer::format instead.
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template<typename... Args>
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void Format(BasicStringRef<Char> format, const Args & ... args) {
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BasicArg<> arg_array[] = {args...};
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this->format(format, ArgList(arg_array, sizeof...(Args)));
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}
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template<typename... Args>
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void printf(BasicStringRef<Char> format, const Args & ... args) {
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BasicArg<> arg_array[internal::NonZero<sizeof...(Args)>::VALUE] = {args...};
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this->printf(format, ArgList(arg_array, sizeof...(Args)));
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}
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#else
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FMT_VARIADIC_VOID(format)
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FMT_DEPRECATED(void Format(BasicStringRef<Char> format, const Args & ... args));
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#endif
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template <typename T>
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@ -1955,6 +1964,13 @@ inline Formatter<ANSITerminalSink> PrintColored(Color c, StringRef format) {
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#if FMT_USE_VARIADIC_TEMPLATES && FMT_USE_RVALUE_REFERENCES
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template <typename Char>
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template<typename... Args>
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void BasicWriter<Char>::Format(
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BasicStringRef<Char> format, const Args & ... args) {
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this->format(format, args...);
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}
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/**
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\rst
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Formats a string similarly to Python's `str.format
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@ -2165,7 +2181,7 @@ 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_GET_ARG_NAME(type, index) arg##index
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#define FMT_MAKE_ARG(arg, index) fmt::Writer::MakeArg(arg)
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#define FMT_MAKE_ARG2(arg, index) fmt::Writer::MakeArg(arg)
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#define FMT_VARIADIC(return_type, func_name, ...) \
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inline return_type func_name(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__)) { \
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@ -2175,14 +2191,14 @@ inline void FormatDec(char *&buffer, T value) {
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template <typename T1> \
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inline return_type func_name(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
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const T1 &v1) { \
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const fmt::internal::ArgInfo args[] = {FMT_FOR_EACH(FMT_MAKE_ARG, v1)}; \
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const fmt::internal::ArgInfo args[] = {FMT_FOR_EACH(FMT_MAKE_ARG2, v1)}; \
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return func_name(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), \
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fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
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} \
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template <typename T1, typename T2> \
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inline return_type func_name(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
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const T1 &v1, const T2 &v2) { \
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const fmt::internal::ArgInfo args[] = {FMT_FOR_EACH(FMT_MAKE_ARG, v1, v2)}; \
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const fmt::internal::ArgInfo args[] = {FMT_FOR_EACH(FMT_MAKE_ARG2, v1, v2)}; \
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return func_name(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), \
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fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
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} \
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@ -2190,7 +2206,7 @@ inline void FormatDec(char *&buffer, T value) {
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inline return_type func_name(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
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const T1 &v1, const T2 &v2, const T3 &v3) { \
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const fmt::internal::ArgInfo args[] = { \
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FMT_FOR_EACH(FMT_MAKE_ARG, v1, v2, v3) \
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FMT_FOR_EACH(FMT_MAKE_ARG2, v1, v2, v3) \
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}; \
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return func_name(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), \
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fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
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@ -2199,7 +2215,7 @@ inline void FormatDec(char *&buffer, T value) {
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inline return_type func_name(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
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const T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4) { \
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const fmt::internal::ArgInfo args[] = { \
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FMT_FOR_EACH(FMT_MAKE_ARG, v1, v2, v3, v4) \
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FMT_FOR_EACH(FMT_MAKE_ARG2, v1, v2, v3, v4) \
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}; \
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return func_name(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), \
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fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
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@ -2208,7 +2224,7 @@ inline void FormatDec(char *&buffer, T value) {
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inline return_type func_name(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
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const T1 &v1, const T2 &v2, const T3 &v3, const T4 &v4, const T5 &v5) { \
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const fmt::internal::ArgInfo args[] = { \
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FMT_FOR_EACH(FMT_MAKE_ARG, v1, v2, v3, v4, v5) \
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FMT_FOR_EACH(FMT_MAKE_ARG2, v1, v2, v3, v4, v5) \
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}; \
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return func_name(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), \
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fmt::ArgList(args, sizeof(args) / sizeof(*args))); \
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