Re:Help me sort out the meaning of “{}” as a constructor arg...
by sqeaky on Wednesday November 23, 2016 @11:50AM
(#13023834)
> Undefined behavior is not specified
But it is precisely specified how to invoke undefined behavior. For example when to numbers are added and they overflow the size of the type. This is carefully specified when this is or isn't undefined behavior. The C++ standard goes into excruciating detail but they have not covered everything
Compare that to many of the newer scripting languages. Elsewhere on this page I described how to recover from a segfault by setting string conversion function, which I don't think was specified anywhere. You can break some newer language by overriding innocuous function like #hash on some objects. These languages have at least as many pitfalls as C++ they are just less well described.
But it is precisely specified how to invoke undefined behavior. For example when to numbers are added and they overflow the size of the type. This is carefully specified when this is or isn't undefined behavior. The C++ standard goes into excruciating detail but they have not covered everything
Compare that to many of the newer scripting languages. Elsewhere on this page I described how to recover from a segfault by setting string conversion function, which I don't think was specified anywhere. You can break some newer language by overriding innocuous function like #hash on some objects. These languages have at least as many pitfalls as C++ they are just less well described.