I am writing a programmatic lexer that inherits from MergableLexerBase. In the lexer I need to able to recognize numeric literals, including decimal, hexdecimal, octal, and binary integers and floating numbers. Can I use Regular Expression to do the parsing? Or Must I hand-write the parser? Is there any sample code that does the similar things?
Thanks,
Xuesong Wu
Hi Xuesong,
Please have a look at the Getting Started 3c QuickStart as that shows a programmatic lexer. Programmatic lexers require you to advance through the ITextBufferReader to consume the current token's text and then return what token that text was. You can determine that however you need in code. We have done it in hand-written code. It would be difficult to use regular expressions though there because you don't have a text string to examine, since you are provided an ITextBufferReader.
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