[antlr-interest] "An Introduction to ANTLR" presentation slides

[Guntis Ozols]

> A lexer takes letters 'c', 'a', and 't' as input and outputs the word "cat".
> If the word "cat" isn't the "meaning" of those letters, then I'm
> completely lost.

Lost, of course...
Just letters, just words, just sentences, stream or tree or whatever...
These are not the "meaning" yet.

See http://en.wikipedia.org/wiki/Cat for a description of "cat"
to understand the meaning of "cat".