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Update README.rst

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Victor Zverovich 2017-10-20 18:00:31 -07:00 committed by GitHub
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@ -106,9 +106,7 @@ An object of any user-defined type for which there is an overloaded
std::string s = fmt::format("The date is {}", Date(2012, 12, 9));
// s == "The date is 2012-12-9"
You can use the `FMT_VARIADIC
<http://fmtlib.net/latest/api.html#utilities>`_
macro to create your own functions similar to `format
You can create your own functions similar to `format
<http://fmtlib.net/latest/api.html#format>`_ and
`print <http://fmtlib.net/latest/api.html#print>`_
which take arbitrary arguments:
@ -116,17 +114,19 @@ which take arbitrary arguments:
.. code:: c++
// Prints formatted error message.
void report_error(const char *format, fmt::ArgList args) {
void vreport_error(const char *format, fmt::args args) {
fmt::print("Error: ");
fmt::print(format, args);
fmt::vprint(format, args);
}
template <typename... Args>
void report_error(const char *format, const Args & ... args) {
vreport_error(format, fmt::make_args(args));
}
FMT_VARIADIC(void, report_error, const char *)
report_error("file not found: {}", path);
Note that you only need to define one function that takes ``fmt::ArgList``
argument. ``FMT_VARIADIC`` automatically defines necessary wrappers that
accept variable number of arguments.
Note that ``vreport_error`` is not parameterized on argument types which can
improve compile times and reduce code size compared to fully parameterized version.
Projects using this library
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