[antlr-interest] How to do abbreviation

[Micheal J]

Hi,

> Hi,
> 
>   Is there a way to parse abbreviated key words using ANTLR? 
> For example, I would like to recognize "ex 1" as "example 1".
> 

A. Using tokens:

grammar AbbeviatedKeywordsLanguage;

tokens 
{
    EX_AMPLE = 'ex';
    EXAMPLE  = 'example';
}

command: example INT;

example: EX_AMPLE | EXAMPLE;

....
....

B. Using rules (can get messy and expect conflicts with IDENT rule):

EXAMPLE: 'ex' ( 'ample' )?;


Micheal

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