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view lphobos/typeinfo1/ti_cfloat.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 | 79c9ac745fbc |
children |
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// cfloat module typeinfo1.ti_cfloat; class TypeInfo_q : TypeInfo { char[] toString() { return "cfloat"; } hash_t getHash(void *p) { return (cast(uint *)p)[0] + (cast(uint *)p)[1]; } static int _equals(cfloat f1, cfloat f2) { return f1 == f2; } static int _compare(cfloat f1, cfloat f2) { int result; if (f1.re < f2.re) result = -1; else if (f1.re > f2.re) result = 1; else if (f1.im < f2.im) result = -1; else if (f1.im > f2.im) result = 1; else result = 0; return result; } int equals(void *p1, void *p2) { return _equals(*cast(cfloat *)p1, *cast(cfloat *)p2); } int compare(void *p1, void *p2) { return _compare(*cast(cfloat *)p1, *cast(cfloat *)p2); } size_t tsize() { return cfloat.sizeof; } void swap(void *p1, void *p2) { cfloat t; t = *cast(cfloat *)p1; *cast(cfloat *)p1 = *cast(cfloat *)p2; *cast(cfloat *)p2 = t; } void[] init() { static cfloat r; return (cast(cfloat *)&r)[0 .. 1]; } }