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diff tests/mini/conststructliteral.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 | |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/tests/mini/conststructliteral.d Sun Jun 14 19:49:58 2009 +0200 @@ -0,0 +1,27 @@ +struct S { int i; } + +const S s1; +static this() { s1 = S(5); } +const S s2 = { 5 }; +const S s3 = S(5); +S foo() { S t; t.i = 5; return t; } +const S s4 = foo(); + +const ps1 = &s1; +const ps2 = &s2; +//const ps3 = &s3; // these could be made to work +//const ps4 = &s4; + +extern(C) int printf(char*,...); +void main() { + printf("%p %p\n", ps1, ps2); + printf("%p %p %p %p\n", &s1, &s2, &s3, &s4); + + assert(ps1 == ps1); + assert(ps2 == ps2); + assert(&s1 == &s1); + assert(&s2 == &s2); + assert(&s3 == &s3); + assert(&s4 == &s4); +} +