[mpah]

I've just updated committed some stuff to svn in src/gcc, and also updated the web pages.

The idea is to create stub procedures by preprocessing tree.def, so that they can be directly called from code generator rules.

At present the stubs can be called 'out of the box' to generate trace output and also to show how a vairable can be used for communication between them, and I've hacked a d-to-d translator backend so that a subset of expressions drive the dummy interface procedures instead of translating to D.
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The Language Machine - a toolkit for language and grammar