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+ What is tinylex? A tiny lexical analyser generator + How to implement? I refer to Allen Holub's book 'Compiler design in C' and write it by myself. + Format of the input file (see test/colour.l for example, which is a C syntax higlighter): %{ < code block for definition or macro > %} < Macro Definition: macroname macrotext > < e.g: digit [0-9] > < recursive macro definition is not allowed.> %% < Rules: regularexp action string > < e.g: {digit}+ printf("%d", yytext); > < only one-line action string is allowed. > %% < code block for main function > + Usage: compile: # make [generate tinylex and egrep_like ] # ./tinylex -p lex.yy.part.c {source script}.l -o {generated ouput}.c test: # make test [see the output information] debug: # make debug [generate many debug programes, such as nfa] # ./nfa test/common_test.l [output NFAS information according to common_test.l script (regular expresion for testing) ] + TODO: 1. bugfix: using `grep -C 2 -n FIXME *.c` to get bug information 2. make tinylex compatible with flex/lex. (Tinylex is only subset of flex/lex now. And many auxiliary functions or flags aren't supported, such as yywrap/yymore/yyrestart) 3. support multi-line accept action string (Maybe I need a internal C parser.) 4. support recursive macro definition + Author: Xiaochen Wang <wangxiaochen0@gmail.com>
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