/** * Implementation of array copy support routines. * * Copyright: Copyright Digital Mars 2004 - 2016. * License:   Distributed under the *            $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0). * Authors:   Walter Bright, Sean Kelly * Source:    $(DRUNTIMESRC rt/_arraycat.d) */ module rt.arraycat; // debug = PRINTF; import core.internal.util.array;import core.stdc.string : memcpy; debug(PRINTF) import core.stdc.stdio : printf; extern (C) @trusted nothrow: void[] _d_arraycopy(size_t size, void[] from, void[] to){    debug(PRINTF) printf("f = %p,%zd, t = %p,%zd, size = %zd\n",                 from.ptr, from.length, to.ptr, to.length, size);     enforceRawArraysConformable("copy", size, from, to);    memcpy(to.ptr, from.ptr, to.length * size);    return to;}