LivePreview for Lexer

[ris58h]

I would like to check what tokens are produced by a lexer that specified in a .flex file.
We have LivePreview for Parser. Could we have LivePreview for Lexer too? Without it developing a lexer is such a PITA.

[gregsh]

Without it developing a lexer is such a PITA.

A simple lexer test makes it quite tolerable IMO.

[gregsh]

JFlex is a state machine plus a user-defined java code that can also mess with states.

The user-defined code sections limit our possibilities to only one option - to reuse the generated lexer class.

So here's the idea of a quick way to do that without messing with javac:

If the lexer depends only on token-type constants and JDK then it is possible to load it as a groovy script into a javax.scripting groovy engine.

See also #44

[ris58h]

A simple lexer test makes it quite tolerable IMO.

I need it for debug, not for verification. IDE should provide good UX IMO.

to reuse the generated lexer class

I believe so.

See also #44

I'm aware of #44, but it seems like a Parser LiveView improvement, although it's related to a lexer.

[thirteenthree]

any update;