Emilio Cobos Álvarez
b2e224354b
Using operator= is not quite sound in presence of destructors and operator overloading. It's perfectly fine to assume that the left-hand-side of an operator= expression is valid memory, however we're using uninitialized memory here, that may not be the case. Use placement new to properly construct tagged unions. I don't need this with any urgency, but it's the right thing to do in presence of complex types, and the current code seems a bomb waiting to explode :)
36 lines
429 B
C++
36 lines
429 B
C++
#include <cstdarg>
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#include <cstdint>
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#include <cstdlib>
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#include <new>
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enum class Status : uint32_t {
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Ok,
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Err,
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};
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struct Dep {
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int32_t a;
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float b;
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};
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template<typename X>
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struct Foo {
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X a;
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X b;
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Dep c;
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};
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using IntFoo = Foo<int32_t>;
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using DoubleFoo = Foo<double>;
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using Unit = int32_t;
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using SpecialStatus = Status;
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extern "C" {
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void root(IntFoo x, DoubleFoo y, Unit z, SpecialStatus w);
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} // extern "C"
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