/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4 -*- */

/* Scanner for the Faust language */

%{
#include "tree.hh"
#include "faustparser.hpp"
#if defined(WIN32)
#if !defined(__MINGW32__) && !defined(__MSYS__)
// We don't want to include compatibility.hh here, since it pulls in whole lot
// of unneeded stuff which breaks other things, so here's some stuff to make
// MSVC happy.
#include <io.h>
#define isatty _isatty
#define fileno _fileno
#define YY_NO_UNISTD_H
#endif
#else
#include "compatibility.hh"
#include "errormsg.hh"

#define YY_FATAL_ERROR lexerror
#endif

#define register        // suppress the deprecated 'register' warning

%}

DIGIT    [0-9]
ID       _*[a-zA-Z][_a-zA-Z0-9]*
LETTER   [a-zA-Z]
NUMBER   ({DIGIT}+"."{DIGIT}*|"."{DIGIT}+|{DIGIT}+)
WSPACE   [ \t\n]
TMACRO   \\{ID}(\[(\ *({ID}|{NUMBER}),?\ *)\])?(\{(\ *({ID}|{NUMBER}),?\ *)*\})*
NSID     {ID}("::"{ID})*

%option yylineno
%option nounput
%x comment
%x doc
%x lst

%%

"/*"                            BEGIN(comment);
<comment>[^*\x0a\x0d]*          /* eat anything that's not a '*'         */
<comment>"*"+[^*/\x0a\x0d]*     /* eat up '*'s not followed by '/'s     */
<comment>\x0a\x0d               /* no need to increment yylineno here     */
<comment>\x0a                   /* no need to increment yylineno here     */
<comment>\x0d                   /* no need to increment yylineno here     */
<comment>"*"+"/"                BEGIN(INITIAL);

"<mdoc>"                        { BEGIN(doc); return BDOC; }
<doc>.                          return DOCCHAR; /* char by char, may be slow ?? */
<doc>\n                         return DOCCHAR; /* keep newline chars */
<doc>"<notice/>"                return NOTICE;  /* autoclosing tag */
<doc>"<notice />"               return NOTICE;  /* autoclosing tag */
<doc>"<listing"                 { BEGIN(lst);        return BLST; } /* autoclosing tag */
<doc>"<equation>"               { BEGIN(INITIAL);     return BEQN; }
"</equation>"                   { BEGIN(doc);         return EEQN; }
<doc>"<diagram>"                { BEGIN(INITIAL);     return BDGM; }
"</diagram>"                    { BEGIN(doc);         return EDGM; }
<doc>"<metadata>"               { BEGIN(INITIAL);     return BMETADATA; }
"</metadata>"                   { BEGIN(doc);         return EMETADATA; }
<doc>"</mdoc>"                  { BEGIN(INITIAL);     return EDOC; }

<lst>"true"                     return LSTTRUE;
<lst>"false"                    return LSTFALSE;
<lst>"dependencies"             return LSTDEPENDENCIES;
<lst>"mdoctags"                 return LSTMDOCTAGS;
<lst>"distributed"              return LSTDISTRIBUTED;
<lst>"="                        return LSTEQ;
<lst>"\""                       return LSTQ;
<lst>"/>"                       { BEGIN(doc);     return ELST; }


{DIGIT}+            return INT;

{DIGIT}+"f"                             return FLOAT;
{DIGIT}+"."{DIGIT}*                     return FLOAT;
{DIGIT}+"."{DIGIT}*"f"                  return FLOAT;
{DIGIT}+"."{DIGIT}*e[-+]?{DIGIT}+       return FLOAT;
{DIGIT}+"."{DIGIT}*e[-+]?{DIGIT}+"f"    return FLOAT;
{DIGIT}+e[-+]?{DIGIT}+                  return FLOAT;
{DIGIT}+e[-+]?{DIGIT}+"f"               return FLOAT;
"."{DIGIT}+                             return FLOAT;
"."{DIGIT}+"f"                          return FLOAT;
"."{DIGIT}+e[-+]?{DIGIT}+               return FLOAT;
"."{DIGIT}+e[-+]?{DIGIT}+"f"            return FLOAT;

":"           return SEQ;
","           return PAR;
"<:"          return SPLIT;
"+>"          return MIX;
":>"          return MIX;
"~"           return REC;

"+"           return ADD;
"-"           return SUB;
"*"           return MUL;
"/"           return DIV;
"%"           return MOD;
"@"           return FDELAY;
"'"           return DELAY1;

"&"           return AND;
"|"           return OR;
"xor"         return XOR;

"<<"          return LSH;
">>"          return RSH;

"<"           return LT;
"<="          return LE;
">"           return GT;
">="          return GE;
"=="          return EQ;
"!="          return NE;

"_"           return WIRE;
"!"           return CUT;

";"           return ENDDEF;
"="           return DEF;
"("           return LPAR;
")"           return RPAR;
"{"           return LBRAQ;
"}"           return RBRAQ;
"["           return LCROC;
"]"           return RCROC;

"\\"          return LAMBDA;
"."           return DOT;
"with"        return WITH;
"letrec"      return LETREC;
"where"       return WHERE;

"mem"         return MEM;
"prefix"      return PREFIX;

"int"         return INTCAST;
"float"       return FLOATCAST;
"any"         return NOTYPECAST;

"rdtable"     return RDTBL;
"rwtable"     return RWTBL;

"select2"     return SELECT2;
"select3"     return SELECT3;

"ffunction"   return FFUNCTION;
"fconstant"   return FCONSTANT;
"fvariable"   return FVARIABLE;

"button"      return BUTTON;
"checkbox"    return CHECKBOX;
"vslider"     return VSLIDER;
"hslider"     return HSLIDER;
"nentry"      return NENTRY;
"vgroup"      return VGROUP;
"hgroup"      return HGROUP;
"tgroup"      return TGROUP;
"vbargraph"   return VBARGRAPH;
"hbargraph"   return HBARGRAPH;
"soundfile"   return SOUNDFILE;

"attach"      return ATTACH;

"acos"        return ACOS;
"asin"        return ASIN;
"atan"        return ATAN;
"atan2"       return ATAN2;

"cos"         return COS;
"sin"         return SIN;
"tan"         return TAN;

"exp"         return EXP;
"log"         return LOG;
"log10"       return LOG10;
"^"           return POWOP;
"pow"         return POWFUN;
"sqrt"        return SQRT;

"abs"         return ABS;
"min"         return MIN;
"max"         return MAX;

"fmod"        return FMOD;
"remainder"   return REMAINDER;

"floor"       return FLOOR;
"ceil"        return CEIL;
"rint"        return RINT;
"round"       return ROUND;

"seq"         return ISEQ;
"par"         return IPAR;
"sum"         return ISUM;
"prod"        return IPROD;

"inputs"      return INPUTS;
"outputs"     return OUTPUTS;

"import"      return IMPORT;
"component"   return COMPONENT;
"library"     return LIBRARY;
"environment" return ENVIRONMENT;

"waveform"    return WAVEFORM;
"route"       return ROUTE;
"enable"      return ENABLE;
"control"     return CONTROL;

"declare"     return DECLARE;

"case"        return CASE;
"=>"          return ARROW;

"assertbounds" return ASSERTBOUNDS;
"lowest"       return LOWEST;
"highest"       return HIGHEST;

"singleprecision" return FLOATMODE;
"doubleprecision" return DOUBLEMODE;
"quadprecision"   return QUADMODE;
"fixedpointprecision"    return FIXEDPOINTMODE;


"::"{NSID}       return IDENT;
{NSID}           return IDENT;

"\""[^\"]*"\""   return STRING;

"<"{LETTER}*"."{LETTER}">"    return FSTRING;
"<"{LETTER}*">"               return FSTRING;


"//"[^\x0a\x0d]*    /* eat up one-line comments */

[ \t\x0a\x0d]+      /* eat up whitespace */

<<EOF>>   yyterminate();

.  printf("extra text is : %s\n", yytext); return EXTRA;


%%
int yywrap() { return 1; }
