Namespaces
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Namespaces fornecem um método para a prevenção de conflitos de nomes em grandes projetos.
Original:
Namespaces provide a method for preventing name conflicts in large projects.
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Símbolos declarados dentro de um bloco namespace são colocados em um escopo nomeado que os impede de serem confundidos com símbolos com nomes idênticos em outros escopos.
Original:
Symbols declared inside a namespace block are placed in a named scope that prevents them from being mistaken for identically-named symbols in other scopes.
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Várias declarações de namespaces com o mesmo nome são permitidos, resultando em um espaço de nomes, incluindo todos os símbolos de todas essas declarações.
Original:
Multiple declarations of namespaces with the same name are allowed, resulting in a namespace including all symbols from all such declarations.
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Índice |
[editar] Sintaxe
namespace ns_name { declarations }
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(1) | ||||||||
inline namespace ns_name { declarations }
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(2) | (desde C++11) | |||||||
ns_name::name
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(3) | ||||||||
using namespace ns_name;
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(4) | ||||||||
using ns_name::name;
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(5) | ||||||||
[editar] Explicação
| Esta seção está incompleta |
# Declaração da name namespace.
Original:
# Declaration of the namespace name.
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# Declaração da name namespace. Definições aparecerá tanto name dentro e seu namespace de fechamento
Original:
# Declaration of the namespace name. Definitions will appear both inside name and its enclosing namespace
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# Maneira padrão de acesso ao conteúdo namespace.
Original:
# Standard way of accessing namespace content.
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# Fazer todos os símbolos de um espaço acessível no âmbito da directiva usando.
Original:
# Making all symbols of a namespace accessible in the scope of the using directive.
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# Fazer um símbolos específicos de um espaço acessível no âmbito da directiva usando.
Original:
# Making a specific symbols of a namespace accessible in the scope of the using directive.
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[editar] Exemplo
Este exemplo mostra como usar um espaço para criar uma classe que já foi nomeado no namespace
std .
Original:
This example shows how to use a namespace to create a class that already has been named in the
std namespace.
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#include <vector> namespace vec { template< typename T > class vector { // ... }; } // of vec int main() { std::vector<int> v1; // Standard vector. vec::vector<int> v2; // User defined vector. v1 = v2; // Error: v1 and v2 are different object's type. { using namespace std; vector<int> v3; // Same as std::vector v1 = v3; // OK } { using vec::vector; vector<int> v4; // Same as vec::vector v2 = v4; // OK } return 0; }
[editar] Veja também
| alias de namespace | cria um alias de um namespace existente
Original: creates an alias of an existing namespace The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
