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NAMElex - generator of lexical analysis programsSYNOPSISlex [ -tvn9 ] [ file ... ]DESCRIPTIONLex generates programs to be used in simple lexical analysis of text. The input files (standard input default) contain regular expressions to be searched for and actions written in C to be executed when expressions are found.A C source program, lex.yy.c is generated. This program, when run, copies unrecognized portions of the input to the output, and executes the associated C action for each regular expression that is recognized. The options have the following meanings.
EXAMPLESThis program converts upper case to lower, removes blanks at the end of lines, and replaces multiple blanks by single blanks.%% [A-Z] putchar(yytext[0]+´a´-´A´); [ ]+$ [ ]+ putchar(´ ´); FILES
SEE ALSOyacc(1),M. E. Lesk and E. Schmidt, `LEX—Lexical Analyzer Generator', Unix Research System Programmer's Manual, Tenth Edition, Volume 2. SOURCE/src/cmd/lexBUGSCannot handle UTF.The asteroid to kill this dinosaur is still in orbit. Visit the GSP FreeBSD Man Page Interface. |