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Document ostream support limitation

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Victor Zverovich 2021-03-12 15:49:22 -08:00
parent bac14ef985
commit d28101878a
1 changed files with 4 additions and 1 deletions
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doc/api.rst
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@ -487,7 +487,7 @@ System APIs
======================== ========================
``fmt/ostream.h`` provides ``std::ostream`` support including formatting of ``fmt/ostream.h`` provides ``std::ostream`` support including formatting of
user-defined types that have overloaded ``operator<<``:: user-defined types that have an overloaded insertion operator (``operator<<``)::
#include <fmt/ostream.h> #include <fmt/ostream.h>
@ -504,6 +504,9 @@ user-defined types that have overloaded ``operator<<``::
std::string s = fmt::format("The date is {}", date(2012, 12, 9)); std::string s = fmt::format("The date is {}", date(2012, 12, 9));
// s == "The date is 2012-12-9" // s == "The date is 2012-12-9"
{fmt} only supports insertion operators that are defined in the same namespaces
as the types they format and can be found with the argument-dependent lookup.
.. doxygenfunction:: print(std::basic_ostream<Char> &os, const S &format_str, Args&&... args) .. doxygenfunction:: print(std::basic_ostream<Char> &os, const S &format_str, Args&&... args)
.. _printf-api: .. _printf-api: