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723cfef519
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.
28 lines
525 B
D
28 lines
525 B
D
struct S { int i; }
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const S s1;
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static this() { s1 = S(5); }
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const S s2 = { 5 };
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const S s3 = S(5);
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S foo() { S t; t.i = 5; return t; }
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const S s4 = foo();
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const ps1 = &s1;
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const ps2 = &s2;
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//const ps3 = &s3; // these could be made to work
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//const ps4 = &s4;
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extern(C) int printf(char*,...);
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void main() {
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printf("%p %p\n", ps1, ps2);
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printf("%p %p %p %p\n", &s1, &s2, &s3, &s4);
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assert(ps1 == ps1);
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assert(ps2 == ps2);
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assert(&s1 == &s1);
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assert(&s2 == &s2);
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assert(&s3 == &s3);
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assert(&s4 == &s4);
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}
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