lex: add page (#1783)

2017-12-30 16:14:00 +00:00
parent aff5862f09 c08906baca
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--- a/pages/common/lex.md
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+# lex
+
+> Lexical analyser generator.
+> Given the specification for a lexical analyser, generates C code implementing it.
+
+- Generate an analyser from a Lex file:
+
+`lex {{analyser.l}}`
+
+- Specify the output file:
+
+`lex {{analyser.l}} --outfile {{analyser.c}}`
+
+- Compile a C file generated by Lex:
+
+`cc {{path/to/lex.yy.c}} --output {{executable}}`