mllex(1) General Commands Manual mllex(1)NAME
mllex - lexer generator for use with Standard ML and MLton
SYNOPSIS
mllex foo.lex
DESCRIPTION
mllex takes as input a lexer specification foo.lex and produces as output in foo.lex.sml a lexer written in SML.
For details on the lexer specification, see A Lexical Analyzer Generator for Standard ML, which is in /usr/share/doc/mllex.pdf.
SEE ALSO mlton(1),mlyacc(1)
February 23, 2008 mllex(1)
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LEX(1) General Commands Manual LEX(1)NAME
lex - generator of lexical analysis programs
SYNOPSIS
lex [ -tvfn ] [ file ] ...
DESCRIPTION
Lex generates programs to be used in simple lexical analyis 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, to be compiled thus:
cc lex.yy.c -ll
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 following lex 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(' ');
The options have the following meanings.
-t Place the result on the standard output instead of in file `lex.yy.c'.
-v Print a one-line summary of statistics of the generated analyzer.
-n Opposite of -v; -n is default.
-f `Faster' compilation: don't bother to pack the resulting tables; limited to small programs.
SEE ALSO yacc(1)
M. E. Lesk and E. Schmidt, LEX - Lexical Analyzer Generator
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