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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 |
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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); }