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|    comp.compilers    |    Compiler construction, theory, etc. (Mod    |    2,753 messages    |
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|    Message 2,595 of 2,753    |
|    Hans-Peter Diettrich to All    |
|    Union C++ standard    |
|    25 Nov 21 11:11:04    |
      From: DrDiettrich1@netscape.net              Can somebody explain why the access to members of a union is "undefined"       except for the most recently written member?              What can be undefined in a union of data types of the same typesize end       alignment? Any member written will result in a unique bit/byte pattern       in memory, whose reading may not make sense in a different type but       undoubtedly is well defined.              DoDi       [I think it's undefined in a standards sense. In any individual       implementation the result is predictable, but it's not portable. -John]              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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