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/* This Lex script acts as a filter to pre-process Latex files.
It surrounds groups of lines beginning with a ">" sign, and
preceded and followed by a blank line, with \begin{verbatim}
and \end{verbatim}. The ">" may be preceded by a digit or digit
range (eg 4>, 2-5>, 3->); in this case the digits are removed.
They are meant to be used for filtering out versions.
It takes words surrounded with @ signs (thus @letrec@) and makes them
come out in typewriter font, regardless of the current mode.
*/
%START NORM VERB MIRANDA VERBATIM VERBATIMSIM
sp [ \t]*
nl {sp}\n{sp}
miranda ([0-9]+(\-([0-9]+)?)?)?>
%{
#define PUSH states[top++] =
#define POP BEGIN states[--top]
#define yywrap() 1
%}
%%
int states[256];
int top;
BEGIN NORM;
top = 0;
<NORM>@@ { printf ("@"); }
<NORM>@ { printf ("\\mbox{\\tt "); PUSH NORM; BEGIN VERB; }
<VERB>@ { printf ("}"); POP; }
<VERB>\n { printf ("}\\\\{}\n\\mbox{\\tt "); }
<VERB>" " { printf ("\\ "); }
<VERB>@@ { printf ("@"); }
<VERB>\# { printf ("{\\char'43}"); }
<VERB>\$ { printf ("{\\char'44}"); }
<VERB>\% { printf ("{\\char'45}"); }
<VERB>\& { printf ("{\\char'46}"); }
<VERB>\~ { printf ("{\\char'176}"); }
<VERB>\_ { printf ("{\\char'137}"); }
<VERB>\^ { printf ("{\\char'136}"); }
<VERB>\\ { printf ("{\\char'134}"); }
<VERB>\{ { printf ("{\\char'173}"); }
<VERB>\} { printf ("{\\char'175}"); }
<NORM>^@{sp}\n { printf( "\\begin{verbatim}\n" );
PUSH NORM; BEGIN VERBATIMSIM; }
<VERBATIMSIM>^@{sp}\n { printf( "\\end{verbatim}\n" ); POP; }
<NORM>\\"begin{verbatim}" { printf( "\\begin{verbatim}" );
PUSH NORM; BEGIN VERBATIM; }
<VERBATIM>\\"end{verbatim}" { printf( "\\end{verbatim}" ); POP; }
<NORM>^\n{miranda} { printf ("\\begin{verbatim}\n>" );
PUSH NORM; BEGIN MIRANDA; }
<MIRANDA>\n{miranda} { printf( "\n>" ); }
<MIRANDA>^\n { printf ("\\end{verbatim}\n"); POP; }
%%
int
main()
{
yylex();
return(0);
}
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