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by ericlippert
2279 days ago
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A 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. |
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