[antlr-interest] saving some memory

[thrutchy]

ANTLR developers,

The next time around you might consider making token types that are a
constant string have the resulting tokens use those constant strings
rather than allocating new strings for each instance of the token. 
So, this way the strings "if", "while", "<<", etc will be allocated
only once and shared throughout an AST.  I just tried finding a way to
do it with the current version by overriding methods and didn't see a way.

Eric




 
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