XL (programming language): Difference between revisions

Revision as of 03:28, 24 March 2009

Revision as of 01:29, 25 March 2009

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The XL1 phase is defined as a sequence of operations on the XL0 parse tree. These operations are provided by various compiler plug-ins, that are triggered based on the shape of the parse tree.

Special constructs, <code>translate</code> and <code>translation</code>, are provided by a plug-in designed to facilitate the writing of other plug-ins. The <code>quote</code> construct generates a parse tree. Here is how these notationnotations can be used to implement a plug-in called <code>ZeroRemoval</code> that eliminates superfluous additions and multiplications by zero.

translation ZeroRemoval