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 :)
55 lines
662 B
C++
55 lines
662 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 MyCLikeEnum {
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Foo1,
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Bar1,
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Baz1,
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};
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struct MyFancyStruct {
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int32_t i;
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#ifdef __cplusplus
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inline void foo();
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#endif
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};
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struct MyFancyEnum {
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enum class Tag {
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Foo,
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Bar,
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Baz,
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};
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struct Bar_Body {
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int32_t _0;
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};
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struct Baz_Body {
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int32_t _0;
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};
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Tag tag;
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union {
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Bar_Body bar;
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Baz_Body baz;
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};
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#ifdef __cplusplus
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inline void wohoo();
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#endif
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};
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union MyUnion {
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float f;
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uint32_t u;
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int32_t extra_member; // yolo
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};
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extern "C" {
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void root(MyFancyStruct s, MyFancyEnum e, MyCLikeEnum c, MyUnion u);
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} // extern "C"
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