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view tests/mini/dgs.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 | 1bb99290e03a |
children |
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line source
extern(C) int printf(char*, ...); struct S { int i; int square() { return i*i; } int plus(int a) { return i + a; } int minus(int a) { return i - a; } int delegate(int) get(char op) { int delegate(int) rval; if (op == '+') rval = + else if (op == '-') rval = − return rval; } } int calldg1(int delegate(int) dg, int i) { return dg(i); } void delegate() retdg() { void delegate() dg; return dg; } void getretdg() { void delegate() dg; dg = retdg(); } class C { int i; void m() { i = 42; } } void getclassdg() { scope c = new C; void delegate() dg = &c.m; assert(c.i != 42); dg(); assert(c.i == 42); } void main() { printf("Delegate test\n"); S s = S(4); auto dg = &s.square; //assert(dg() == 16); //dg(); /*auto dg1 = &s.plus; assert(dg1(6) == 10); auto dg2 = &s.minus; assert(calldg1(dg2,30) == -26); auto dg3 = s.get('+'); assert(dg3(16) == 20); getretdg(); getclassdg();*/ printf(" SUCCESS\n"); }