The honest answer: because it shouldn’t work and has never been done before. TeX has no arrays, no functions with return values, no convenient local variables or stack frames, no integers bigger than 2^{31}-1, no bitwise operations. Macro expansion can recurse, but you get no call stack and deep recursion quickly hits engine limits. What TeX does have is a Turing-complete macro expansion engine and, with e-TeX extensions (used by modern pdfTeX), up to 32,768 integer registers called \count. That turns out to be just barely enough to implement a chess engine.
Москвичам пообещали тепло17:31。新收录的资料是该领域的重要参考
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「它能幫助男孩和女孩保持健康，預防HPV相關癌症，並提升公共衛生整體狀況。」，推荐阅读新收录的资料获取更多信息
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Finally, let’s talk about the character of the bugs that I found