[antlr-interest] Purpose of '!'

Terence Parr parrt at cs.usfca.edu
Tue Jun 22 13:31:45 PDT 2004


On Jun 22, 2004, at 12:28 PM, bob at werken.com wrote:

>
> To prevent the default AST node from being created.

Or in the lexer to prevent text matched from being added to token text.
Ter
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