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 :)
37 lines
433 B
C++
37 lines
433 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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struct A {
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int32_t namespace_;
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float float_;
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};
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struct B {
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int32_t namespace_;
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float float_;
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};
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struct C {
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enum class Tag : uint8_t {
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D,
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};
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struct D_Body {
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int32_t namespace_;
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float float_;
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};
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Tag tag;
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union {
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D_Body d;
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};
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};
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extern "C" {
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void root(A a, B b, C c, int32_t namespace_, float float_);
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} // extern "C"
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