Alternative operator representations
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C + + (e C) código-fonte pode ser escrito em qualquer conjunto de caracteres não-ASCII 7-bit, que inclui o conjunto de caracteres ISO 646/ECMA-6 invariante. No entanto, vários operadores C + + e Punctuators exigem caracteres que estão fora do ISO 646 codeset:
{, }, [, ], #, \, ^, |, ~. Para ser capaz de utilizar a codificação de caracteres em que alguns ou todos estes símbolos não existem, C + + define dois tipos de alternativas: as palavras-chave adicionais que correspondem aos operadores que utilizam esses caracteres e combinações específicas de dois ou três ISO 646 caracteres compatíveis que são interpretados como se fossem um único não-ISO 646 caracteres.Original:
C++ (and C) source code may be written in any non-ASCII 7-bit character set that includes the ISO 646/ECMA-6 invariant character set. However, several C++ operators and punctuators require characters that are outside of the ISO 646 codeset:
{, }, [, ], #, \, ^, |, ~. To be able to use character encodings where some or all of these symbols do not exist, C++ defines two kinds of alternatives: additional keywords that correspond to the operators that use these characters and special combinations of two or three ISO 646 compatible characters that are interpreted as if they were a single non-ISO 646 character.The text has been machine-translated via Google Translate.
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[editar] Palavras-chave alternativas
Há grafias alternativas para vários operadores definidos como palavras-chave em C + + padrão.
Original:
There are alternative spellings for several operators defined as keywords in the C++ standard.
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| Primary | Alternative |
|---|---|
&&
|
and
|
&=
|
and_eq
|
&
|
bitand
|
|
|
bitor
|
~
|
compl
|
!
|
not
|
!=
|
not_eq
|
| || | or |
|=
|
or_eq
|
^
|
xor
|
^=
|
xor_eq
|
[editar] Compatibilidade com C
As mesmas palavras são definidas na linguagem de programação C na <iso646.h> arquivo de inclusão como macros. Porque em C + + são expressões linguísticas, o C + + versão <iso646.h>, bem como <ciso646>, não define qualquer coisa.
Original:
The same words are defined in the C programming language in the include file <iso646.h> as macros. Because in C++ these are language keywords, the C++ version of <iso646.h>, as well as <ciso646>, does not define anything.
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[editar] Dígrafos e trigraphs
As seguintes combinações de duas e três caracteres (dígrafos e trigraphs) são substituições válidos para seus respectivos personagens principais:
Original:
The following combinations of two and three characters (digraphs and trigraphs) are valid substitutions for their respective primary characters:
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| Primary | Digraph | Trigraph |
|---|---|---|
{ |
<% |
??<
|
None} |
%> |
??>
|
[ |
<: |
??(
|
] |
:> |
??)
|
# |
%: |
??=
|
\ |
??/
| |
^ |
??'
| |
| |
??!
| |
~ |
??-
|
[editar] Palavras-chave
and, and_eq, bitand, bitor, compl, not, not_eq, or, or_eq, xor, xor_eq
[editar] Exemplo
O exemplo seguinte demonstra o uso de palavras-chave várias alternativas:
Original:
The following example demonstrates the use of several alternative keywords:
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%:include <iostream> int main(int argc, char *argv<::>) <% if (argc > 1 and argv<:1:> not_eq '\0') <% std::cout << "Hello " << argv<:1:> << '\n'; %> %>
