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cc lex.yy.c -ll
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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.
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The following
lex program converts upper case to lower,
removes blanks at the end of lines,
and replaces multiple blanks by single blanks.
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%%
[A-Z]putchar(yytext[0]+'a'-'A');
[ ]+$
[ ]+putchar(' ');
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The options have the following meanings.
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-c |
Generate output in the 'C' language.
This is the default.
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-e |
Generates output that can handle multibyte characters,
with yytext[] being of type unsigned char[].
This option is an extension.
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-n |
Opposite of
-v; -n is default.
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-Q(y|n)
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With
-Qy, a version identification variable is put into lex.yy.c.
With
-Qn (the default), no such variable is generated.
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-t |
Place the result on the standard output instead of in file
'lex.yy.c'.
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-v |
Print a one-line summary of statistics of the generated analyzer.
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-V |
Causes version information for
lex to be printed.
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-w |
Generates output that can handle multibyte characters,
with yytext[] being of type wchar_t[].
This option is an extension.
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-Y directory
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Use 'directory' to locate driver files,
instead of the default '/usr/ccs/lib/lex'.
This option is an extension.
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