Espacios de nombres
Variantes
Acciones

Filename and line information

De cppreference.com

 
 
Lenguaje C++
Los temas generales
Original:
General topics
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Control de flujo
Original:
Flow control
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Sentencias condicionales ejecución
Original:
Conditional execution statements
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Instrucciones de iteración
Original:
Iteration statements
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Ir declaraciones
Original:
Jump statements
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Funciones
Original:
Functions
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declaración de la función
lambda declaración de la función
función de plantilla
especificador inline
especificaciones de excepción (obsoleto)
noexcept especificador (C++11)
Excepciones
Original:
Exceptions
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Los espacios de nombres
Original:
Namespaces
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Tipos
Original:
Types
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decltype specifier (C++11)
Los especificadores
Original:
Specifiers
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cv especificadores
almacenamiento duración especificadores
constexpr especificador (C++11)
auto especificador (C++11)
alignas especificador (C++11)
Inicialización
Original:
Initialization
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Los literales
Original:
Literals
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Expresiones
Original:
Expressions
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representaciones alternativas
Utilidades
Original:
Utilities
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Tipos
Original:
Types
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typedef declaration
alias de tipo de declaración (C++11)
atributos (C++11)
Lanza
Original:
Casts
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conversiones implícitas
const_cast conversion
static_cast conversion
dynamic_cast conversion
reinterpret_cast conversion
C-cast estilo y funcional
De asignación de memoria
Original:
Memory allocation
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Clases
Original:
Classes
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Clase propiedades específicas de la función
Original:
Class-specific function properties
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Funciones especiales miembro
Original:
Special member functions
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Plantillas
Original:
Templates
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clase de plantilla
función de plantilla
plantilla de especialización
paquetes de parámetros (C++11)
Varios
Original:
Miscellaneous
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Montaje en línea
 
 
Incluye el archivo fuente en un archivo fuente actual en la línea inmediatamente después de la directiva .
Original:
Includes other source file into current source file at the line immediately after the directive .
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Contenido

[editar] Sintaxis

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

[editar] Explicación

Cambia el número de línea actual preprocesador a lineno. Expansiones del __LINE__ macro más allá de este punto se ampliará para lineno más el número de líneas de código fuente reales encontrados 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)
También cambia el nombre de archivo actual preprocesador para filename. expansiones de la macro __FILE__ desde este punto producirá 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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Cualquier tokens preprocesamiento (constantes o expresiones de macro) están permitidos como argumentos a #line, siempre y cuando se expanden a un entero decimal opcionalmente válido después de una serie de caracteres válida .
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 se usa por algunas herramientas de código de generación automática que producen archivos C + fuente + de un archivo escrito en otro idioma. En ese caso, las directivas #line se puede insertar en la generada en C + + archivos hacen referencia a los números de línea y el nombre de archivo de la original (el hombre editable) el fichero fuente.
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] Ejemplo

#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.