| Expander.java | Interface | Expanders are extension points for expanding
expressions in DRL at parse time.
This is just-in-time translation, or macro expansion, or
whatever you want.
The important thing is that it happens at the last possible moment,
so any errors in expansion are included in the parsers errors.
Just-in-time expansions may include complex pre-compilers,
or just macros, and everything in between.
Expanders should ideally not make presumptions on any embedded semantic
language. |