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cover some simple value conversion cases

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This commit is contained in:
Fischlurch 2015-04-26 04:46:32 +02:00
parent 2aeb18c118
commit 11c8a8afe9
1 changed files with 9 additions and 1 deletions
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10
tests/library/meta/access-casted-test.cpp
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@ -225,9 +225,17 @@ namespace test {
cout << "Access(E(F)* as F&) --->" << AccessCasted<F&>::access(pEF) <<endl;
cout << "Access(E(F)& as F*) --->" << AccessCasted<F*>::access(pEF) <<endl;
cout << "Access(F* as X*) --->" << AccessCasted<X*>::access(pF) <<endl; // upcast to the other mixin is OK
cout << "Access(F* as X*) --->" << AccessCasted<X*>::access(pXF) <<endl; //
cout << "Access(X(F)* as X*) --->" << AccessCasted<X*>::access(pXF) <<endl; //
cout << "Access(F* as B*) --->" << AccessCasted<B*>::access(pF) <<endl; // upcast to base
// AccessCasted<X*>::access(pEF); // cross-cast not supported (to complicated to implement)
// AccessCasted<F*>::access(pXF); // downcast not possible, since X does not provide RTTI
int i = 2;
float fp = 3.1415;
cout << "Access(int as double) --->" << AccessCasted<double>::access(i) <<endl;
cout << "Access(float as long) --->" << AccessCasted<long>::access(fp) <<endl;
// AccessCasted<double&>::access(i); // would undermine the type system, thus ruled out
// AccessCasted<double const&>::access(i); // allowed, but warning: returning reference to temporary (and the warning is justified)
}
};