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Qucs-S S-parameter Viewer & RF Synthesis Tools
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A parse tree node Consider these immutable once constructed. As a side effect of a memory-saving strategy in the cache, multiple references to a single ``Node`` might be returned in a single parse tree. So, if you start messing with one, you'll see surprising parallel changes pop up elsewhere. My philosophy is that parse trees (and their nodes) should be representation-agnostic. That is, they shouldn't get all mixed up with what the final rendered form of a wiki page (or the intermediate representation of a programming language, or whatever) is going to be: you should be able to parse once and render several representations from the tree, one after another.