Espaços nominais
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Filename and line information

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Linguagem C + +
Tópicos gerais
Original:
General topics
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Controle de fluxo
Original:
Flow control
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Declarações execução condicional
Original:
Conditional execution statements
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Instruções de iteração
Original:
Iteration statements
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Ir declarações
Original:
Jump statements
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Funções
Original:
Functions
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declaração da função
lambda declaração da função
modelo de função
linha especificador
especificações de exceção (obsoleta)
noexcept especificador (C++11)
Exceções
Original:
Exceptions
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Namespaces
Original:
Namespaces
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Tipos
Original:
Types
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decltype specifier (C++11)
Especificadores
Original:
Specifiers
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cv especificadores
armazenamento duração especificadores
constexpr especificador (C++11)
auto especificador (C++11)
alignas especificador (C++11)
Inicialização
Original:
Initialization
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Literais
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Literals
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Expressões
Original:
Expressions
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representações alternativas
Utilitários
Original:
Utilities
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Tipos
Original:
Types
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typedef declaration
tipo de alias declaração (C++11)
atributos (C++11)
Lança
Original:
Casts
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conversões implícitas
const_cast conversion
static_cast conversion
dynamic_cast conversion
reinterpret_cast conversion
Elenco C-estilo e funcional
Alocação de memória
Original:
Memory allocation
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Classes
Original:
Classes
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Classe propriedades específicas de função
Original:
Class-specific function properties
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Funções membro especiais
Original:
Special member functions
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Modelos
Original:
Templates
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modelo de classe
modelo de função
especialização de modelo
pacotes de parâmetros (C++11)
Diversos
Original:
Miscellaneous
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Assembly embutido
 
 
Inclui arquivo de outra fonte em arquivo de fonte de corrente na linha imediatamente após a diretiva.
Original:
Includes other source file into current source file at the line immediately after the directive .
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Índice

[editar] Sintaxe

#line lineno (1)
#line lineno "filename" (2)

[editar] Explicação

Altera o número da linha atual de pré-processamento para lineno. expansões do __LINE__ macro além deste ponto vai se expandir para lineno mais o número de linhas de código fonte reais encontradas desde.
Original:
Changes the current preprocessor line number to lineno. Expansions of the macro __LINE__ beyond this point will expand to lineno plus the number of actual source code lines encountered since.
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2)
Também altera o nome do arquivo atual pré-processador para filename. Expansões da macro __FILE__ a partir deste ponto vai produzir filename.
Original:
Also changes the current preprocessor file name to filename. Expansions of the macro __FILE__ from this point will produce filename.
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Qualquer fichas de pré-processamento (constantes macro ou expressões) são permitidos como argumentos para #line, desde que se expandir para um decimal inteiro válido, opcionalmente, após uma seqüência de caracteres válido.
Original:
Any preprocessing tokens (macro constants or expressions) are permitted as arguments to #line as long as they expand to a valid decimal integer optionally following a valid character string.
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[editar] Notas

Esta directiva é usada por algumas ferramentas de código automáticas geração que produzem C + arquivos de origem + a partir de um arquivo escrito em outro idioma. Nesse caso, as directivas #line pode ser inserido no gerado arquivo C + + números de linha referência eo nome do arquivo (humano-editável) fonte original.
Original:
This directive is used by some automatic code generation tools which produce C++ source files from a file written in another language. In that case, #line directives may be inserted in the generated C++ file referencing line numbers and the file name of the original (human-editable) source file.
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[editar] Exemplo

#include <cassert>
#define FNAME "test.cc"
int main()
{
#line 777 FNAME
        assert(2+2 == 5);
}

Output:

test: test.cc:777: int main(): Assertion `2+2 == 5' failed.