Mercurial > projects > ldc
view lphobos/typeinfo2/ti_Ashort.d @ 1418:f5f8c21ce6ef
Make "`aa[key]`" use the same runtime call as "`key in aa`". The runtime calls
these were using were different, but with equivalent definitions.
With `ldc -O3`, the following functions now all compile to the exact same code:
{{{
int[int] y;
void foo(int x) {
if (x in y) {
auto z = x in y;
sink(*z);
}
}
void bar(int x) {
if (x in y) {
sink(y[x]);
}
}
void baz(int x) {
if (auto p = x in y) {
sink(*p);
}
}
}}}
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Mon, 25 May 2009 12:50:40 +0200 |
parents | 362825278842 |
children |
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line source
module typeinfo2.ti_Ashort; extern(C) int memcmp(void*,void*,size_t); // short[] class TypeInfo_As : TypeInfo { char[] toString() { return "short[]"; } hash_t getHash(void *p) { short[] s = *cast(short[]*)p; size_t len = s.length; short *str = s.ptr; hash_t hash = 0; while (1) { switch (len) { case 0: return hash; case 1: hash *= 9; hash += *cast(ushort *)str; return hash; default: hash *= 9; hash += *cast(uint *)str; str += 2; len -= 2; break; } } return hash; } int equals(void *p1, void *p2) { short[] s1 = *cast(short[]*)p1; short[] s2 = *cast(short[]*)p2; return s1.length == s2.length && memcmp(cast(void *)s1, cast(void *)s2, s1.length * short.sizeof) == 0; } int compare(void *p1, void *p2) { short[] s1 = *cast(short[]*)p1; short[] s2 = *cast(short[]*)p2; size_t len = s1.length; if (s2.length < len) len = s2.length; for (size_t u = 0; u < len; u++) { int result = s1[u] - s2[u]; if (result) return result; } return cast(int)s1.length - cast(int)s2.length; } size_t tsize() { return (short[]).sizeof; } uint flags() { return 1; } TypeInfo next() { return typeid(short); } } // ushort[] class TypeInfo_At : TypeInfo_As { char[] toString() { return "ushort[]"; } int compare(void *p1, void *p2) { ushort[] s1 = *cast(ushort[]*)p1; ushort[] s2 = *cast(ushort[]*)p2; size_t len = s1.length; if (s2.length < len) len = s2.length; for (size_t u = 0; u < len; u++) { int result = s1[u] - s2[u]; if (result) return result; } return cast(int)s1.length - cast(int)s2.length; } TypeInfo next() { return typeid(ushort); } } // wchar[] class TypeInfo_Au : TypeInfo_At { char[] toString() { return "wchar[]"; } TypeInfo next() { return typeid(wchar); } }