K
kruseborn
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It's undefined behavior to read from the member of the union that wasn't most recently written. Many compilers implement, as a language extension, the ability to read inactive members of a union. Any written documentation from MS about this?
GCC has written documentation that they support this: Optimize Options - Using the GNU Compiler Collection (GCC)
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GCC has written documentation that they support this: Optimize Options - Using the GNU Compiler Collection (GCC)
Continue reading...