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Differences for revision 1.5 from 1.4

--- /internals.mdwn	2007/09/27 18:15:32	1.4
+++ /internals.mdwn	2007/09/27 18:23:04	1.5
@@ -2,6 +2,8 @@
 The compiler is conceptually structured in two parts: [[pass1]] which is language-dependent, does parsing, typechecking and build trees, and [[pass2]] which is mostly language-independent.
+The main data structure used through the whole compiler is the [[NODE]]. The parse trees are built out of [[NODE]]s and it is the underlying data structure when generating code.
 The instruction generator searches for largest coverable tree, as described
 in the Dragon [book](books) for example, but with additions from me to find the most
 efficient instruction when there are multiple choices.

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