On Thursday, 22 June 2017 at 13:56:29 UTC, ag0aep6g wrote:
For example, the type system guarantees that immutable data
never changes. But the compiler allows you to cast from
immutable to mutable and change the data. It's an invalid
operation, but the compiler is not expected to catch that for
you.
Casts are part of the type system. Yes, D type system allows
invalid operations. It's not the compiler's fault, it's type
system's fault.
unittest
{
immutable int a = 4;
int* b = cast(int*) &a;
*b = 5;
assert(*(&a) == 5);
assert(a == 4);
}
