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Oh, I'd assumed disagreement on behavior of query="" between the two code samples meant it was UB and was looking for crashes/invalid memory accesses.
by jpochtar 7y ago
Oh, I'd assumed disagreement on behavior of query="" between the two code samples meant it was UB and was looking for crashes/invalid memory accesses.
- ericlippert 7y agoA Visual Basic program is not allowed to have undefined behaviours like a C program; InStr has a specification and that specification has to be implemented; that spec includes defining the behaviour for all inputs. There's also no null handling here, which was a deliberate omission for clarity. In practice, the convention used inside the VB source code is that null string pointers are semantically the same as empty strings, which introduces some complexities.
- jpochtar 7y agoah neat, thanks!