std:: messages_byname
|
Defined in header
<locale>
|
||
|
template
<
class
CharT
>
class messages_byname : public std:: messages < CharT > ; |
||
std::messages_byname
is a
std::messages
facet which encapsulates retrieval of strings from message catalogs of the locale specified at its construction.
Specializations
The standard library is guaranteed to provide the following specializations:
|
Defined in header
<locale>
|
|
| std :: messages_byname < char > | narrow/multibyte message catalog access |
| std :: messages_byname < wchar_t > | wide string message catalog access |
Nested types
| Type | Definition |
catalog
|
std:: messages_base < CharT > :: catalog |
string_type
|
std:: basic_string < CharT > |
Member functions
|
(constructor)
|
constructs a new
messages_byname
facet
(public member function) |
|
(destructor)
|
destroys a
messages_byname
facet
(protected member function) |
std::messages_byname:: messages_byname
|
explicit
messages_byname
(
const
char
*
name,
std::
size_t
refs
=
0
)
;
|
||
|
explicit
messages_byname
(
const
std::
string
&
name,
std::
size_t
refs
=
0
)
;
|
(since C++11) | |
Constructs a new
std::messages_byname
facet for a locale with
name
.
refs is used for resource management: if refs == 0 , the implementation destroys the facet, when the last std::locale object holding it is destroyed. Otherwise, the object is not destroyed.
Parameters
| name | - | the name of the locale |
| refs | - | the number of references that link to the facet |
std::messages_byname:: ~messages_byname
|
protected
:
~messages_byname ( ) ; |
||
Destroys the facet.
Inherited from std:: messages
Nested types
| Type | Definition |
char_type
|
CharT
|
string_type
|
std:: basic_string < CharT > |
Data members
| Member | Description |
std::locale::id
id
[static]
|
the identifier of the facet |
Member functions
invokes
do_open
(public member function of
std::messages<CharT>
)
|
|
invokes
do_get
(public member function of
std::messages<CharT>
)
|
|
invokes
do_close
(public member function of
std::messages<CharT>
)
|
Protected member functions
|
[virtual]
|
opens a named message catalog
(virtual protected member function of
std::messages<CharT>
)
|
|
[virtual]
|
retrieves a message from an open message catalog
(virtual protected member function of
std::messages<CharT>
)
|
|
[virtual]
|
closes a message catalog
(virtual protected member function of
std::messages<CharT>
)
|
Inherited from std:: messages_base
Nested types
| Type | Definition |
catalog
|
an unspecified signed integer type |
Example
#include <iostream> #include <locale> void try_with(const std::locale& loc) { const std::messages<char>& facet = std::use_facet<std::messages<char>>(loc); std::messages<char>::catalog cat = facet.open("sed", std::cout.getloc()); if (cat < 0) std::cout << "Could not open \"sed\" message catalog\n"; else std::cout << "\"No match\" " << facet.get(cat, 0, 0, "No match") << '\n' << "\"Memory exhausted\" " << facet.get(cat, 0, 0, "Memory exhausted") << '\n'; facet.close(cat); } int main() { std::locale loc("en_US.utf8"); std::cout.imbue(loc); try_with(std::locale(loc, new std::messages_byname<char>("de_DE.utf8"))); try_with(std::locale(loc, new std::messages_byname<char>("fr_FR.utf8"))); try_with(std::locale(loc, new std::messages_byname<char>("ja_JP.utf8"))); }
Possible output:
"No match" Keine Übereinstimmung "Memory exhausted" Speicher erschöpft "No match" Pas de concordance "Memory exhausted" Mémoire épuisée "No match" 照合しません "Memory exhausted" メモリーが足りません
See also
|
implements retrieval of strings from message catalogs
(class template) |