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view lphobos/typeinfo2/ti_Ashort.d @ 1499:df11cdec45a2
Another shot at fixing the issues with (constant) struct literals and their addresses. See DMD2682, #218, #324.
The idea is to separate the notion of const from 'this variable can always be
replaced with its initializer' in the frontend. To do that, I introduced
Declaration::isSameAsInitializer, which is overridden in VarDeclaration to
return false for constants that have a struct literal initializer.
So
{{{
const S s = S(5);
void foo() { auto ps = &s; }
// is no longer replaced by
void foo() { auto ps = &(S(5)); }
}}}
To make taking the address of a struct constant with a struct-initializer
outside of function scope possible, I made sure that AddrExp::optimize doesn't
try to run the argument's optimization with WANTinterpret - that'd again
replace the constant with a struct literal temporary.
author | Christian Kamm <kamm incasoftware de> |
---|---|
date | Sun, 14 Jun 2009 19:49:58 +0200 |
parents | 362825278842 |
children |
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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); } }