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Is there a way to make a prediction using fslex / Lexing.LexBuffer

I use fslex, and in one of the rules of my tokenizer, I need to look for the next char so that I can decide whether to continue tokens or stop, relax, and allow the old rule to be used.

I did some verification of the source code, and it seems that the only way is to compile a version that provides some internal methods. Maybe someone has a better solution?

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Perhaps look at the source code for LexBuffer. Although there are properties ( BufferScanStartand BufferScanLength) to set the lexer position in the input stream, they are internal. I am not sure what is required to ensure their safe use.

There is also a question about HubFS which is about return. The conclusion seems to be the same: fslex does not currently support it.

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