Variable Arguments

Part of StandardLibraryCategory

Description

Use std.c.stdarg for variable arguments.

The std.c.stdarg module is now obsolete with the release of DMD 0.93. Use std.stdarg instead (see VariableArgumentsUsingStdStdargExample).

Example

import std.c.stdarg;


int foo(char *x, ...)
{
    va_list ap;

    va_start!(typeof(x))(ap, x);
    printf("&x = %p, ap = %p\n", &x, ap);

    int i;
    i = va_arg!(typeof(i))(ap);
    printf("i = %d\n", i);

    long l;
    l = va_arg!(typeof(l))(ap);
    printf("l = %lld\n", l);

    uint k;
    k = va_arg!(typeof(k))(ap);
    printf("k = %u\n", k);

    va_end(ap);

    return i + l + k;
}


void main()
{
    int j;

    j = foo("hello", 3, 23L, 4);
    printf("j = %d\n", j);
    assert(j == 30);
}

Source

Adapted from digitalmars.D/273.