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by Joker_vD
895 days ago
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Why is it "exceptionally stupid"? sscanf is basically a slighlty more primitive regex engine than e.g. PCRE and I suspect it would work about as fast (if it weren't for that silly strlen() call) — and there are lexers that are basically just a loop with a match() call in it with (?P<NUMBER>?\d+(\.\d*)?)|(?P<ASSIGN>:=)|(?P<SEMI>;)|(?P<ID>[A-Za-z_][A-Za-z0-9_]*)|(?P<ARITH>[-+*/])|(?P<NEWLINE>\n)|(?P<WHITESPACE>[ \t\r]+)|(?P<MISMATCH>.)
as the pattern or something like that over the input string, and that is not generally considered to be a stupid way to write a lexer. Why would sscanf be? |
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