dynamic_format_arg_store< Context > Class Template Reference

A dynamic version of fmt::format_arg_store. More...

#include <args.h>

Public Member Functions
template<typename T >
void	push_back (const T &arg)
	Adds an argument into the dynamic store for later passing to a formatting function. More...
template<typename T >
void	push_back (std::reference_wrapper< T > arg)
	Adds a reference to the argument into the dynamic store for later passing to a formatting function. More...
template<typename T >
void	push_back (const detail::named_arg< char_type, T > &arg)
	Adds named argument into the dynamic store for later passing to a formatting function. More...
void	clear ()
	Erase all elements from the store.
void	reserve (size_t new_cap, size_t new_cap_named)
	Reserves space to store at least new_cap arguments including new_cap_named* named arguments. More...

Friends
class	basic_format_args< Context >

Detailed Description

template<typename Context>
class dynamic_format_arg_store< Context >

A dynamic version of fmt::format_arg_store.

It's equipped with a storage to potentially temporary objects which lifetimes could be shorter than the format arguments object.

It can be implicitly converted into ~fmtbasic_format_args for passing into type-erased formatting functions such as ~fmt::vformat.

Member Function Documentation

push_back() [1/3]

template<typename Context>

template<typename T >

void dynamic_format_arg_store< Context >::push_back ( const T &  arg )

inline

Adds an argument into the dynamic store for later passing to a formatting function.

Note that custom types and string types (but not string views) are copied into the store dynamically allocating memory if necessary.

Example**::

fmt::dynamic_format_arg_store<fmt::format_context> store; store.push_back(42); store.push_back("abc"); store.push_back(1.5f); std::string result = fmt::vformat("{} and {} and {}", store);

push_back() [2/3]

template<typename Context>

template<typename T >

void dynamic_format_arg_store< Context >::push_back ( std::reference_wrapper< T >  arg )

inline

Adds a reference to the argument into the dynamic store for later passing to a formatting function.

Example**::

fmt::dynamic_format_arg_store<fmt::format_context> store; char band[] = "Rolling Stones"; store.push_back(std::cref(band)); band[9] = 'c'; // Changing str affects the output. std::string result = fmt::vformat("{}", store); result == "Rolling Scones"

push_back() [3/3]

template<typename Context>

template<typename T >

void dynamic_format_arg_store< Context >::push_back ( const detail::named_arg< char_type, T > &  arg )

inline

Adds named argument into the dynamic store for later passing to a formatting function.

std::reference_wrapper is supported to avoid copying of the argument. The name is always copied into the store.

reserve()

template<typename Context>

void dynamic_format_arg_store< Context >::reserve ( size_t  new_cap, size_t  new_cap_named  )

inline

Reserves space to store at least new_cap arguments including new_cap_named* named arguments.