view tests/mini/vararg4.d @ 1275:bedf0bfb8fdb

Implement first D-specific optimization pass: -simplify-drtcalls. It uses the machinery of the standard -simplify-libcalls pass, but optimizes calls to the D runtime instead of calls to C libraries. At the moment, these optimizations are implemented by this pass: - Avoid the runtime call for `arr.length = newlen` if it can determine that the new length isn't longer than the old one. - Ditto for `cast(T[]) arr` if it will clearly always succeed. (e.g. if the length of the original array is zero, or if the old element size is a multiple of the new element size)
author Frits van Bommel <fvbommel wxs.nl>
date Tue, 28 Apr 2009 21:58:06 +0200
parents 1bb99290e03a
children
line wrap: on
line source

module vararg4;
import tango.core.Vararg;
extern(C) int printf(char*, ...);

void vafunc(...)
{
    foreach(i,v; _arguments) {
        if (typeid(byte) == v) {
            printf("byte(%d)\n", va_arg!(byte)(_argptr));
        }
        else if (typeid(short) == v) {
            printf("short(%d)\n", va_arg!(short)(_argptr));
        }
        else if (typeid(int) == v) {
            printf("int(%d)\n", va_arg!(int)(_argptr));
        }
        else if (typeid(long) == v) {
            printf("long(%ld)\n", va_arg!(long)(_argptr));
        }
        else if (typeid(float) == v) {
            printf("float(%f)\n", va_arg!(float)(_argptr));
        }
        else if (typeid(double) == v) {
            printf("double(%f)\n", va_arg!(double)(_argptr));
        }
        else if (typeid(real) == v) {
            printf("real(%f)\n", va_arg!(real)(_argptr));
        }
        else
        assert(0, "unsupported type");
    }
}

void main()
{
    vafunc(byte.max,short.max,1,2,3,4L,5.0f,6.0,cast(real)7);
}