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by haberman
3553 days ago
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> No, TeX is not a compiler by a common sense of a compiler (unless you say it compiles to PDF). That is exactly what I am saying. > TeX's input grammer can change during the TeX run, so I believe it is impossible to make an equivalent of LLVM The important part is not the grammar, but the internal representation. I don't know enough about TeX to know much about its internal representation post-parsing. |
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IIRC it's a stream of tokens. A token can be a character, a built-in command, a macro etc. During processing of this token stream macros are "expanded", i.e. replaced with their definition (recursively). It is possible to control this expansion process using built-in commands.