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Diff for /src/usr.bin/lex/flex.1 between version 1.6 and 1.7

version 1.6, 1999/05/12 13:26:51 version 1.7, 1999/06/05 01:21:30
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                 yyin = fopen( argv[0], "r" );                  yyin = fopen( argv[0], "r" );
         else          else
                 yyin = stdin;                  yyin = stdin;
   
         yylex();          yylex();
         }          }
   
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 .PP  .PP
 If the action contains a '{', then the action spans till the balancing '}'  If the action contains a '{', then the action spans till the balancing '}'
 is found, and the action may cross multiple lines.  is found, and the action may cross multiple lines.
 .I flex  .I flex
 knows about C strings and comments and won't be fooled by braces found  knows about C strings and comments and won't be fooled by braces found
 within them, but also allows actions to begin with  within them, but also allows actions to begin with
 .B %{  .B %{
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 (see the discussion of the  (see the discussion of the
 .B \-I  .B \-I
 flag below).  A non-zero value  flag below).  A non-zero value
 in the macro invocation marks the buffer as interactive, a zero  in the macro invocation marks the buffer as interactive, a zero
 value as non-interactive.  Note that use of this macro overrides  value as non-interactive.  Note that use of this macro overrides
 .B %option always-interactive  .B %option always-interactive
 or  or
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 generates a "help" summary of  generates a "help" summary of
 .I flex's  .I flex's
 options to  options to
 .I stdout  .I stdout
 and then exits.  and then exits.
 .B \-?  .B \-?
 and  and
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 specifies that you want flex to generate a C++  specifies that you want flex to generate a C++
 scanner class.  See the section on Generating C++ Scanners below for  scanner class.  See the section on Generating C++ Scanners below for
 details.  details.
 .TP  .TP
 .B \-C[aefFmr]  .B \-C[aefFmr]
 controls the degree of table compression and, more generally, trade-offs  controls the degree of table compression and, more generally, trade-offs
 between small scanners and fast scanners.  between small scanners and fast scanners.
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 Getting rid of backing up is messy and often may be an enormous  Getting rid of backing up is messy and often may be an enormous
 amount of work for a complicated scanner.  In principal, one begins  amount of work for a complicated scanner.  In principal, one begins
 by using the  by using the
 .B \-b  .B \-b
 flag to generate a  flag to generate a
 .I lex.backup  .I lex.backup
 file.  For example, on the input  file.  For example, on the input
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 Compiled with  Compiled with
 .B \-Cf,  .B \-Cf,
 this is about as fast as one can get a  this is about as fast as one can get a
 .I flex  .I flex
 scanner to go for this particular problem.  scanner to go for this particular problem.
 .PP  .PP
 A final note:  A final note:
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 .PP  .PP
 IMPORTANT: the present form of the scanning class is  IMPORTANT: the present form of the scanning class is
 .I experimental  .I experimental
 and may change considerably between major releases.  and may change considerably between major releases.
 .SH INCOMPATIBILITIES WITH LEX AND POSIX  .SH INCOMPATIBILITIES WITH LEX AND POSIX
 .I flex  .I flex
 is a rewrite of the AT&T Unix  is a rewrite of the AT&T Unix
Legend:
Removed from v.1.6  
changed lines
  Added in v.1.7