scan.cc

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// Added by flex++.
#pragma GCC diagnostic ignored "-Wsign-compare"
// Check Clang first, as it does not support -Wzero... but it
// defines __GNUC__.
#if defined __clang__
# pragma clang diagnostic ignored "-Wdeprecated"
# pragma clang diagnostic ignored "-Wnull-conversion"
#elif defined __GNUC__
# pragma GCC diagnostic ignored "-Wsuggest-attribute=const"
# pragma GCC diagnostic ignored "-Wsuggest-attribute=noreturn"
# pragma GCC diagnostic ignored "-Wsuggest-attribute=pure"
# pragma GCC diagnostic ignored "-Wzero-as-null-pointer-constant"
#endif

#line 2 "lib/vcsn/dot/scan.cc"
#line 7 "lib/vcsn/dot/scan.ll"
// Define YY_DECL.
#include <lib/vcsn/dot/parse.hh>

#define yyterminate() return parser::make_END(loc)



#line 11 "lib/vcsn/dot/scan.cc"

#define  YY_INT_ALIGNED short int

/* A lexical scanner generated by flex */

/* %not-for-header */

/* %if-c-only */
/* %if-not-reentrant */
/* %endif */
/* %endif */
/* %ok-for-header */

#define FLEX_SCANNER
#define YY_FLEX_MAJOR_VERSION 2
#define YY_FLEX_MINOR_VERSION 6
#define YY_FLEX_SUBMINOR_VERSION 0
#if YY_FLEX_SUBMINOR_VERSION > 0
#define FLEX_BETA
#endif

/* %if-c++-only */
    /* The c++ scanner is a mess. The FlexLexer.h header file relies on the
     * following macro. This is required in order to pass the c++-multiple-scanners
     * test in the regression suite. We get reports that it breaks inheritance.
     * We will address this in a future release of flex, or omit the C++ scanner
     * altogether.
     */
    #define yyFlexLexer yyFlexLexer
/* %endif */

/* %if-c-only */
/* %endif */

/* %if-c-only */
/* %endif */

/* First, we deal with  platform-specific or compiler-specific issues. */

/* begin standard C headers. */
/* %if-c-only */
/* %endif */

/* %if-tables-serialization */
/* %endif */
/* end standard C headers. */

/* %if-c-or-c++ */
/* flex integer type definitions */

#ifndef FLEXINT_H
#define FLEXINT_H

/* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */

#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L

/* C99 says to define __STDC_LIMIT_MACROS before including stdint.h,
 * if you want the limit (max/min) macros for int types. 
 */
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS 1
#endif

#include <inttypes.h>
typedef int8_t flex_int8_t;
typedef uint8_t flex_uint8_t;
typedef int16_t flex_int16_t;
typedef uint16_t flex_uint16_t;
typedef int32_t flex_int32_t;
typedef uint32_t flex_uint32_t;
#else
typedef signed char flex_int8_t;
typedef short int flex_int16_t;
typedef int flex_int32_t;
typedef unsigned char flex_uint8_t; 
typedef unsigned short int flex_uint16_t;
typedef unsigned int flex_uint32_t;

/* Limits of integral types. */
#ifndef INT8_MIN
#define INT8_MIN               (-128)
#endif
#ifndef INT16_MIN
#define INT16_MIN              (-32767-1)
#endif
#ifndef INT32_MIN
#define INT32_MIN              (-2147483647-1)
#endif
#ifndef INT8_MAX
#define INT8_MAX               (127)
#endif
#ifndef INT16_MAX
#define INT16_MAX              (32767)
#endif
#ifndef INT32_MAX
#define INT32_MAX              (2147483647)
#endif
#ifndef UINT8_MAX
#define UINT8_MAX              (255U)
#endif
#ifndef UINT16_MAX
#define UINT16_MAX             (65535U)
#endif
#ifndef UINT32_MAX
#define UINT32_MAX             (4294967295U)
#endif

#endif /* ! C99 */

#endif /* ! FLEXINT_H */

/* %endif */

/* %if-c++-only */
/* begin standard C++ headers. */
#include <iostream> 
#include <errno.h>
#include <cstdlib>
#include <cstdio>
#include <cstring>
/* end standard C++ headers. */
/* %endif */

#ifdef __cplusplus

/* The "const" storage-class-modifier is valid. */
#define YY_USE_CONST

#else   /* ! __cplusplus */

/* C99 requires __STDC__ to be defined as 1. */
#if defined (__STDC__)

#define YY_USE_CONST

#endif  /* defined (__STDC__) */
#endif  /* ! __cplusplus */

#ifdef YY_USE_CONST
#define yyconst const
#else
#define yyconst
#endif

/* %not-for-header */

/* Returned upon end-of-file. */
#define YY_NULL 0
/* %ok-for-header */

/* %not-for-header */

/* Promotes a possibly negative, possibly signed char to an unsigned
 * integer for use as an array index.  If the signed char is negative,
 * we want to instead treat it as an 8-bit unsigned char, hence the
 * double cast.
 */
#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c)
/* %ok-for-header */

/* %if-reentrant */
/* %endif */

/* %if-not-reentrant */

/* %endif */

/* Enter a start condition.  This macro really ought to take a parameter,
 * but we do it the disgusting crufty way forced on us by the ()-less
 * definition of BEGIN.
 */
#define BEGIN (yy_start) = 1 + 2 *

/* Translate the current start state into a value that can be later handed
 * to BEGIN to return to the state.  The YYSTATE alias is for lex
 * compatibility.
 */
#define YY_START (((yy_start) - 1) / 2)
#define YYSTATE YY_START

/* Action number for EOF rule of a given start state. */
#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)

/* Special action meaning "start processing a new file". */
#define YY_NEW_FILE yyrestart( yyin  )

#define YY_END_OF_BUFFER_CHAR 0

/* Size of default input buffer. */
#ifndef YY_BUF_SIZE
#ifdef __ia64__
/* On IA-64, the buffer size is 16k, not 8k.
 * Moreover, YY_BUF_SIZE is 2*YY_READ_BUF_SIZE in the general case.
 * Ditto for the __ia64__ case accordingly.
 */
#define YY_BUF_SIZE 32768
#else
#define YY_BUF_SIZE 16384
#endif /* __ia64__ */
#endif

/* The state buf must be large enough to hold one state per character in the main buffer.
 */
#define YY_STATE_BUF_SIZE   ((YY_BUF_SIZE + 2) * sizeof(yy_state_type))

#ifndef YY_TYPEDEF_YY_BUFFER_STATE
#define YY_TYPEDEF_YY_BUFFER_STATE
typedef struct yy_buffer_state *YY_BUFFER_STATE;
#endif

#ifndef YY_TYPEDEF_YY_SIZE_T
#define YY_TYPEDEF_YY_SIZE_T
typedef size_t yy_size_t;
#endif

/* %if-not-reentrant */
extern yy_size_t yyleng;
/* %endif */

/* %if-c-only */
/* %if-not-reentrant */
/* %endif */
/* %endif */

#define EOB_ACT_CONTINUE_SCAN 0
#define EOB_ACT_END_OF_FILE 1
#define EOB_ACT_LAST_MATCH 2

    #define YY_LESS_LINENO(n)
    #define YY_LINENO_REWIND_TO(ptr)
    
/* Return all but the first "n" matched characters back to the input stream. */
#define yyless(n) \
        do \
                { \
                /* Undo effects of setting up yytext. */ \
        int yyless_macro_arg = (n); \
        YY_LESS_LINENO(yyless_macro_arg);\
                *yy_cp = (yy_hold_char); \
                YY_RESTORE_YY_MORE_OFFSET \
                (yy_c_buf_p) = yy_cp = yy_bp + yyless_macro_arg - YY_MORE_ADJ; \
                YY_DO_BEFORE_ACTION; /* set up yytext again */ \
                } \
        while ( 0 )

#define unput(c) yyunput( c, (yytext_ptr)  )

#ifndef YY_STRUCT_YY_BUFFER_STATE
#define YY_STRUCT_YY_BUFFER_STATE
struct yy_buffer_state
        {
/* %if-c-only */
/* %endif */

/* %if-c++-only */
        std::streambuf* yy_input_file; 
/* %endif */

        char *yy_ch_buf;                /* input buffer */
        char *yy_buf_pos;               /* current position in input buffer */

        /* Size of input buffer in bytes, not including room for EOB
         * characters.
         */
        yy_size_t yy_buf_size;

        /* Number of characters read into yy_ch_buf, not including EOB
         * characters.
         */
        yy_size_t yy_n_chars;

        /* Whether we "own" the buffer - i.e., we know we created it,
         * and can realloc() it to grow it, and should free() it to
         * delete it.
         */
        int yy_is_our_buffer;

        /* Whether this is an "interactive" input source; if so, and
         * if we're using stdio for input, then we want to use getc()
         * instead of fread(), to make sure we stop fetching input after
         * each newline.
         */
        int yy_is_interactive;

        /* Whether we're considered to be at the beginning of a line.
         * If so, '^' rules will be active on the next match, otherwise
         * not.
         */
        int yy_at_bol;

    int yy_bs_lineno; 
    int yy_bs_column; 
        /* Whether to try to fill the input buffer when we reach the
         * end of it.
         */
        int yy_fill_buffer;

        int yy_buffer_status;

#define YY_BUFFER_NEW 0
#define YY_BUFFER_NORMAL 1
        /* When an EOF's been seen but there's still some text to process
         * then we mark the buffer as YY_EOF_PENDING, to indicate that we
         * shouldn't try reading from the input source any more.  We might
         * still have a bunch of tokens to match, though, because of
         * possible backing-up.
         *
         * When we actually see the EOF, we change the status to "new"
         * (via yyrestart()), so that the user can continue scanning by
         * just pointing yyin at a new input file.
         */
#define YY_BUFFER_EOF_PENDING 2

        };
#endif /* !YY_STRUCT_YY_BUFFER_STATE */

/* %if-c-only Standard (non-C++) definition */
/* %not-for-header */

/* %if-not-reentrant */
/* %endif */
/* %ok-for-header */

/* %endif */

/* We provide macros for accessing buffer states in case in the
 * future we want to put the buffer states in a more general
 * "scanner state".
 *
 * Returns the top of the stack, or NULL.
 */
#define YY_CURRENT_BUFFER ( (yy_buffer_stack) \
                          ? (yy_buffer_stack)[(yy_buffer_stack_top)] \
                          : NULL)

/* Same as previous macro, but useful when we know that the buffer stack is not
 * NULL or when we need an lvalue. For internal use only.
 */
#define YY_CURRENT_BUFFER_LVALUE (yy_buffer_stack)[(yy_buffer_stack_top)]

/* %if-c-only Standard (non-C++) definition */
/* %if-not-reentrant */
/* %not-for-header */

/* %ok-for-header */

/* %endif */
/* %endif */

// void *yyalloc (yy_size_t  );
// void *yyrealloc (void *,yy_size_t  );
// void yyfree (void *  );

#define yy_new_buffer yy_create_buffer

#define yy_set_interactive(is_interactive) \
        { \
        if ( ! YY_CURRENT_BUFFER ){ \
        yyensure_buffer_stack (); \
                YY_CURRENT_BUFFER_LVALUE =    \
            yy_create_buffer( yyin, YY_BUF_SIZE ); \
        } \
        YY_CURRENT_BUFFER_LVALUE->yy_is_interactive = is_interactive; \
        }

#define yy_set_bol(at_bol) \
        { \
        if ( ! YY_CURRENT_BUFFER ){\
        yyensure_buffer_stack (); \
                YY_CURRENT_BUFFER_LVALUE =    \
            yy_create_buffer( yyin, YY_BUF_SIZE ); \
        } \
        YY_CURRENT_BUFFER_LVALUE->yy_at_bol = at_bol; \
        }

#define YY_AT_BOL() (YY_CURRENT_BUFFER_LVALUE->yy_at_bol)

/* %% [1.0] yytext/yyin/yyout/yy_state_type/yylineno etc. def's & init go here */
/* Begin user sect3 */

#define FLEX_DEBUG

typedef unsigned char YY_CHAR;

#define yytext_ptr yytext
#define YY_INTERACTIVE

#include <lib/vcsn/dot/scan.hh>

/* %% [1.5] DFA */

/* %if-c-only Standard (non-C++) definition */
/* %endif */

/* Done after the current pattern has been matched and before the
 * corresponding action - sets up yytext.
 */
#define YY_DO_BEFORE_ACTION \
        (yytext_ptr) = yy_bp; \
/* %% [2.0] code to fiddle yytext and yyleng for yymore() goes here \ */\
        yyleng = (size_t) (yy_cp - yy_bp); \
        (yy_hold_char) = *yy_cp; \
        *yy_cp = '\0'; \
/* %% [3.0] code to copy yytext_ptr to yytext[] goes here, if %array \ */\
        (yy_c_buf_p) = yy_cp;

/* %% [4.0] data tables for the DFA and the user's section 1 definitions go here */
#define YY_NUM_RULES 35
#define YY_END_OF_BUFFER 36
/* This struct is not used in this scanner,
   but its presence is necessary. */
struct yy_trans_info
        {
        flex_int32_t yy_verify;
        flex_int32_t yy_nxt;
        };
static yyconst flex_int16_t yy_accept[90] =
    {   0,
        0,    0,   23,   23,    0,    0,    0,    0,   36,   22,
       20,   21,   17,   13,   22,   22,   22,   19,   12,   14,
       18,   10,   19,    8,    9,   19,   19,   19,   19,   19,
        6,    7,   23,   25,   24,   29,   30,   27,   35,   33,
       34,   32,   31,   20,   21,    0,   19,   11,   19,   16,
       15,   19,   19,   19,   19,   19,   19,   19,   23,   25,
       24,   24,   26,   29,   30,   28,   33,   34,   15,   19,
       19,   19,   19,   19,   19,   19,    2,   19,    4,   19,
       19,    3,   19,   19,   19,    1,   19,    5,    0
    } ;

static yyconst YY_CHAR yy_ec[256] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    2,    1,    4,    1,    1,    1,    1,    1,    1,
        1,    5,    1,    6,    7,    8,    9,   10,   10,   10,
       10,   10,   10,   10,   10,   10,   10,   11,   12,   13,
       14,   15,    1,    1,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       17,   18,   19,    1,   16,    1,   20,   21,   16,   22,

       23,   16,   24,   25,   26,   16,   16,   16,   16,   27,
       28,   29,   16,   30,   31,   16,   32,   16,   16,   16,
       16,   16,   33,    1,   34,    1,    1,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,

       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16,   16,   16,   16,   16,   16,
       16,   16,   16,   16,   16
    } ;

static yyconst YY_CHAR yy_meta[35] =
    {   0,
        1,    1,    2,    3,    4,    1,    1,    1,    1,    5,
        1,    1,    6,    1,    6,    5,    1,    3,    1,    5,
        5,    5,    5,    5,    5,    5,    5,    5,    5,    5,
        5,    5,    1,    1
    } ;

static yyconst flex_uint16_t yy_base[100] =
    {   0,
        0,    0,   32,   33,   36,   38,   40,   44,  150,  151,
      147,  145,  151,  151,   36,  137,   40,   40,  151,  151,
      151,  151,    0,  151,  151,  120,  123,  114,  115,  110,
      151,  151,    0,  138,   53,    0,  137,  151,    0,    0,
      136,  151,  151,  136,  134,  126,   53,  151,  125,  151,
        0,  124,    0,  109,  108,  111,  108,  108,    0,  125,
       55,   60,  151,    0,  124,  151,    0,  123,    0,  115,
       94,  100,   89,   90,   83,   82,    0,   76,    0,   65,
       62,    0,   69,   43,   38,    0,   41,    0,  151,   69,
       75,   81,   47,   87,   93,   99,  105,  111,  116

    } ;

static yyconst flex_int16_t yy_def[100] =
    {   0,
       89,    1,   90,   90,   91,   91,   92,   92,   89,   89,
       89,   89,   89,   89,   89,   89,   89,   89,   89,   89,
       89,   89,   93,   89,   89,   93,   93,   93,   93,   93,
       89,   89,   94,   89,   95,   96,   89,   89,   97,   98,
       89,   89,   89,   89,   89,   89,   89,   89,   89,   89,
       99,   89,   93,   93,   93,   93,   93,   93,   94,   89,
       95,   95,   89,   96,   89,   89,   98,   89,   99,   89,
       93,   93,   93,   93,   93,   93,   93,   93,   93,   93,
       93,   93,   93,   93,   93,   93,   93,   93,    0,   89,
       89,   89,   89,   89,   89,   89,   89,   89,   89

    } ;

static yyconst flex_uint16_t yy_nxt[186] =
    {   0,
       10,   11,   12,   13,   10,   14,   15,   16,   17,   18,
       19,   20,   21,   22,   10,   23,   24,   10,   25,   23,
       23,   26,   27,   28,   23,   23,   29,   23,   23,   23,
       30,   23,   31,   32,   34,   34,   35,   35,   37,   38,
       37,   38,   41,   46,   50,   47,   41,   52,   51,   47,
       48,   53,   42,   39,   43,   39,   42,   62,   43,   89,
       52,   63,   47,   89,   62,   88,   87,   86,   63,   33,
       33,   33,   33,   33,   33,   36,   36,   36,   36,   36,
       36,   40,   40,   40,   40,   40,   40,   59,   85,   59,
       84,   59,   59,   61,   83,   61,   61,   61,   61,   64,

       82,   81,   64,   64,   64,   66,   80,   66,   66,   66,
       66,   67,   79,   67,   67,   67,   69,   78,   69,   69,
       69,   69,   77,   76,   70,   68,   65,   60,   75,   74,
       73,   72,   71,   70,   49,   49,   45,   44,   68,   65,
       60,   58,   57,   56,   55,   54,   49,   45,   44,   89,
        9,   89,   89,   89,   89,   89,   89,   89,   89,   89,
       89,   89,   89,   89,   89,   89,   89,   89,   89,   89,
       89,   89,   89,   89,   89,   89,   89,   89,   89,   89,
       89,   89,   89,   89,   89
    } ;

static yyconst flex_int16_t yy_chk[186] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    3,    4,    3,    4,    5,    5,
        6,    6,    7,   15,   17,   15,    8,   18,   17,   18,
       15,   93,    7,    5,    7,    6,    8,   35,    8,   61,
       47,   35,   47,   61,   62,   87,   85,   84,   62,   90,
       90,   90,   90,   90,   90,   91,   91,   91,   91,   91,
       91,   92,   92,   92,   92,   92,   92,   94,   83,   94,
       81,   94,   94,   95,   80,   95,   95,   95,   95,   96,

       78,   76,   96,   96,   96,   97,   75,   97,   97,   97,
       97,   98,   74,   98,   98,   98,   99,   73,   99,   99,
       99,   99,   72,   71,   70,   68,   65,   60,   58,   57,
       56,   55,   54,   52,   49,   46,   45,   44,   41,   37,
       34,   30,   29,   28,   27,   26,   16,   12,   11,    9,
       89,   89,   89,   89,   89,   89,   89,   89,   89,   89,
       89,   89,   89,   89,   89,   89,   89,   89,   89,   89,
       89,   89,   89,   89,   89,   89,   89,   89,   89,   89,
       89,   89,   89,   89,   89
    } ;

static yyconst flex_int16_t yy_rule_linenum[35] =
    {   0,
       52,   53,   54,   55,   56,   57,   58,   59,   60,   61,
       62,   63,   64,   65,   67,   68,   69,   70,   71,   76,
       77,   78,   82,   83,   84,   85,   89,   94,   95,   96,
      106,  116,  117,  118
    } ;

/* The intent behind this definition is that it'll catch
 * any uses of REJECT which flex missed.
 */
#define REJECT reject_used_but_not_detected
#define yymore() yymore_used_but_not_detected
#define YY_MORE_ADJ 0
#define YY_RESTORE_YY_MORE_OFFSET
#line 1 "lib/vcsn/dot/scan.ll"
/* See <http://www.graphviz.org/content/dot-language>. */
#define YY_NO_INPUT 1

#line 14 "lib/vcsn/dot/scan.ll"
#include <string>
#include <iostream>

#define LINE(Line)                              \
  do {                                          \
    loc.end.column = 1;                         \
    loc.lines(Line);                            \
 } while (false)

#define YY_USER_ACTION                          \
  loc.columns(yyleng);

#define TOK(Token)                              \
  parser::make_ ## Token (loc)

YY_FLEX_NAMESPACE_BEGIN


#line 599 "lib/vcsn/dot/scan.cc"

#define INITIAL 0
#define SC_COMMENT 1
#define SC_STRING 2
#define SC_XML 3

#ifndef YY_NO_UNISTD_H
/* Special case for "unistd.h", since it is non-ANSI. We include it way
 * down here because we want the user's section 1 to have been scanned first.
 * The user has a chance to override it with an option.
 */
/* %if-c-only */
/* %endif */
/* %if-c++-only */
#include <unistd.h>
/* %endif */
#endif

#ifndef YY_EXTRA_TYPE
#define YY_EXTRA_TYPE void *
#endif

/* %if-c-only Reentrant structure and macros (non-C++). */
/* %if-reentrant */
/* %if-c-only */
/* %endif */
/* %if-reentrant */
/* %endif */
/* %endif End reentrant structures and macros. */
/* %if-bison-bridge */
/* %endif */
/* %not-for-header */

/* %ok-for-header */

/* %endif */

#ifndef yytext_ptr
static void yy_flex_strncpy (char *,yyconst char *,int );
#endif

#ifdef YY_NEED_STRLEN
static int yy_flex_strlen (yyconst char * );
#endif

#ifndef YY_NO_INPUT
/* %if-c-only Standard (non-C++) definition */
/* %not-for-header */

/* %ok-for-header */

/* %endif */
#endif

/* %if-c-only */
/* %endif */

/* Amount of stuff to slurp up with each read. */
#ifndef YY_READ_BUF_SIZE
#ifdef __ia64__
/* On IA-64, the buffer size is 16k, not 8k */
#define YY_READ_BUF_SIZE 16384
#else
#define YY_READ_BUF_SIZE 8192
#endif /* __ia64__ */
#endif

/* Copy whatever the last rule matched to the standard output. */
#ifndef ECHO
/* %if-c-only Standard (non-C++) definition */
/* %endif */
/* %if-c++-only C++ definition */
#define ECHO LexerOutput( yytext, yyleng )
/* %endif */
#endif

/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
 * is returned in "result".
 */
#ifndef YY_INPUT
#define YY_INPUT(buf,result,max_size) \
/* %% [5.0] fread()/read() definition of YY_INPUT goes here unless we're doing C++ \ */\
\
/* %if-c++-only C++ definition \ */\
        if ( (int)(result = LexerInput( (char *) buf, max_size )) < 0 ) \
                YY_FATAL_ERROR( "input in flex scanner failed" );
/* %endif */

#endif

/* No semi-colon after return; correct usage is to write "yyterminate();" -
 * we don't want an extra ';' after the "return" because that will cause
 * some compilers to complain about unreachable statements.
 */
#ifndef yyterminate
#define yyterminate() return YY_NULL
#endif

/* Number of entries by which start-condition stack grows. */
#ifndef YY_START_STACK_INCR
#define YY_START_STACK_INCR 25
#endif

/* Report a fatal error. */
#ifndef YY_FATAL_ERROR
/* %if-c-only */
/* %endif */
/* %if-c++-only */
#define YY_FATAL_ERROR(msg) LexerError( msg )
/* %endif */
#endif

/* %if-tables-serialization structures and prototypes */
/* %not-for-header */

/* %ok-for-header */

/* %not-for-header */

/* %tables-yydmap generated elements */
/* %endif */
/* end tables serialization structures and prototypes */

/* %ok-for-header */

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL_IS_OURS 1
/* %if-c-only Standard (non-C++) definition */
/* %endif */
/* %if-c++-only C++ definition */
#define YY_DECL int yyFlexLexer::yylex()
/* %endif */
#endif /* !YY_DECL */

/* Code executed at the beginning of each rule, after yytext and yyleng
 * have been set up.
 */
#ifndef YY_USER_ACTION
#define YY_USER_ACTION
#endif

/* Code executed at the end of each rule. */
#ifndef YY_BREAK
#define YY_BREAK /*LINTED*/break;
#endif

/* %% [6.0] YY_RULE_SETUP definition goes here */
#define YY_RULE_SETUP \
        YY_USER_ACTION

/* %not-for-header */

YY_DECL
{
        yy_state_type yy_current_state;
        char *yy_cp, *yy_bp;
        int yy_act;
    
        if ( !(yy_init) )
                {
                (yy_init) = 1;

#ifdef YY_USER_INIT
                YY_USER_INIT;
#endif

                if ( ! (yy_start) )
                        (yy_start) = 1; /* first start state */

                if ( ! yyin )
/* %if-c-only */
/* %endif */
/* %if-c++-only */
                        yyin.rdbuf(std::cin.rdbuf());
/* %endif */

                if ( ! yyout )
/* %if-c-only */
/* %endif */
/* %if-c++-only */
                        yyout.rdbuf(std::cout.rdbuf());
/* %endif */

                if ( ! YY_CURRENT_BUFFER ) {
                        yyensure_buffer_stack ();
                        YY_CURRENT_BUFFER_LVALUE =
                                yy_create_buffer( yyin, YY_BUF_SIZE );
                }

                yy_load_buffer_state(  );
                }

        {
/* %% [7.0] user's declarations go here */
#line 41 "lib/vcsn/dot/scan.ll"


  // Growing string, for SC_STRING/SC_XML.
  auto s = std::string{};
  // Level of nesting of "<"/">" for SC_XML.
  int nesting = 0;
  loc.step();


#line 809 "lib/vcsn/dot/scan.cc"

        while ( /*CONSTCOND*/1 )                /* loops until end-of-file is reached */
                {
/* %% [8.0] yymore()-related code goes here */
                yy_cp = (yy_c_buf_p);

                /* Support of yytext. */
                *yy_cp = (yy_hold_char);

                /* yy_bp points to the position in yy_ch_buf of the start of
                 * the current run.
                 */
                yy_bp = yy_cp;

/* %% [9.0] code to set up and find next match goes here */
                yy_current_state = (yy_start);
yy_match:
                do
                        {
                        YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)] ;
                        if ( yy_accept[yy_current_state] )
                                {
                                (yy_last_accepting_state) = yy_current_state;
                                (yy_last_accepting_cpos) = yy_cp;
                                }
                        while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
                                {
                                yy_current_state = (int) yy_def[yy_current_state];
                                if ( yy_current_state >= 90 )
                                        yy_c = yy_meta[(unsigned int) yy_c];
                                }
                        yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
                        ++yy_cp;
                        }
                while ( yy_base[yy_current_state] != 151 );

yy_find_action:
/* %% [10.0] code to find the action number goes here */
                yy_act = yy_accept[yy_current_state];
                if ( yy_act == 0 )
                        { /* have to back up */
                        yy_cp = (yy_last_accepting_cpos);
                        yy_current_state = (yy_last_accepting_state);
                        yy_act = yy_accept[yy_current_state];
                        }

                YY_DO_BEFORE_ACTION;

/* %% [11.0] code for yylineno update goes here */

do_action:      /* This label is used only to access EOF actions. */

/* %% [12.0] debug code goes here */
                if ( yy_flex_debug )
                        {
                        if ( yy_act == 0 )
                                std::cerr << "--scanner backing up\n";
                        else if ( yy_act < 35 )
                                std::cerr << "--accepting rule at line " << yy_rule_linenum[yy_act] <<
                                         "(\"" << yytext << "\")\n";
                        else if ( yy_act == 35 )
                                std::cerr << "--accepting default rule (\"" << yytext << "\")\n";
                        else if ( yy_act == 36 )
                                std::cerr << "--(end of buffer or a NUL)\n";
                        else
                                std::cerr << "--EOF (start condition " << YY_START << ")\n";
                        }

                switch ( yy_act )
        { /* beginning of action switch */
/* %% [13.0] actions go here */
                        case 0: /* must back up */
                        /* undo the effects of YY_DO_BEFORE_ACTION */
                        *yy_cp = (yy_hold_char);
                        yy_cp = (yy_last_accepting_cpos);
                        yy_current_state = (yy_last_accepting_state);
                        goto yy_find_action;

/* Vcsn Syntax */
case 1:
YY_RULE_SETUP
#line 52 "lib/vcsn/dot/scan.ll"
return TOK(DIGRAPH);
        YY_BREAK
case 2:
YY_RULE_SETUP
#line 53 "lib/vcsn/dot/scan.ll"
return TOK(EDGE);
        YY_BREAK
case 3:
YY_RULE_SETUP
#line 54 "lib/vcsn/dot/scan.ll"
return TOK(GRAPH);
        YY_BREAK
case 4:
YY_RULE_SETUP
#line 55 "lib/vcsn/dot/scan.ll"
return TOK(NODE);
        YY_BREAK
case 5:
YY_RULE_SETUP
#line 56 "lib/vcsn/dot/scan.ll"
return TOK(SUBGRAPH);
        YY_BREAK
case 6:
YY_RULE_SETUP
#line 57 "lib/vcsn/dot/scan.ll"
return TOK(LBRACE);
        YY_BREAK
case 7:
YY_RULE_SETUP
#line 58 "lib/vcsn/dot/scan.ll"
return TOK(RBRACE);
        YY_BREAK
case 8:
YY_RULE_SETUP
#line 59 "lib/vcsn/dot/scan.ll"
return TOK(LBRACKET);
        YY_BREAK
case 9:
YY_RULE_SETUP
#line 60 "lib/vcsn/dot/scan.ll"
return TOK(RBRACKET);
        YY_BREAK
case 10:
YY_RULE_SETUP
#line 61 "lib/vcsn/dot/scan.ll"
return TOK(EQ);
        YY_BREAK
case 11:
YY_RULE_SETUP
#line 62 "lib/vcsn/dot/scan.ll"
return TOK(ARROW);
        YY_BREAK
case 12:
YY_RULE_SETUP
#line 63 "lib/vcsn/dot/scan.ll"
return TOK(COLON);
        YY_BREAK
case 13:
YY_RULE_SETUP
#line 64 "lib/vcsn/dot/scan.ll"
return TOK(COMMA);
        YY_BREAK
case 14:
YY_RULE_SETUP
#line 65 "lib/vcsn/dot/scan.ll"
return TOK(SEMI);
        YY_BREAK
case 15:
YY_RULE_SETUP
#line 67 "lib/vcsn/dot/scan.ll"
loc.step(); continue;
        YY_BREAK
case 16:
YY_RULE_SETUP
#line 68 "lib/vcsn/dot/scan.ll"
BEGIN(SC_COMMENT);
        YY_BREAK
case 17:
YY_RULE_SETUP
#line 69 "lib/vcsn/dot/scan.ll"
BEGIN(SC_STRING);
        YY_BREAK
case 18:
YY_RULE_SETUP
#line 70 "lib/vcsn/dot/scan.ll"
++nesting; BEGIN(SC_XML);
        YY_BREAK
case 19:
YY_RULE_SETUP
#line 71 "lib/vcsn/dot/scan.ll"
{
               return parser::make_ID
                 (string_t{std::string{yytext, size_t(yyleng)}},
                  loc);
             }
        YY_BREAK
case 20:
YY_RULE_SETUP
#line 76 "lib/vcsn/dot/scan.ll"
loc.step(); continue;
        YY_BREAK
case 21:
/* rule 21 can match eol */
YY_RULE_SETUP
#line 77 "lib/vcsn/dot/scan.ll"
LINE(yyleng); loc.step(); continue;
        YY_BREAK
case 22:
YY_RULE_SETUP
#line 78 "lib/vcsn/dot/scan.ll"
driver_.error(loc, std::string{"invalid character: "}+yytext);
        YY_BREAK


case 23:
YY_RULE_SETUP
#line 82 "lib/vcsn/dot/scan.ll"
loc.step(); continue;
        YY_BREAK
case 24:
YY_RULE_SETUP
#line 83 "lib/vcsn/dot/scan.ll"
loc.step(); continue;
        YY_BREAK
case 25:
/* rule 25 can match eol */
YY_RULE_SETUP
#line 84 "lib/vcsn/dot/scan.ll"
LINE(yyleng); loc.step(); continue;
        YY_BREAK
case 26:
YY_RULE_SETUP
#line 85 "lib/vcsn/dot/scan.ll"
BEGIN(INITIAL);
        YY_BREAK

/* Handling of the strings.  Initial " is eaten. */
case 27:
YY_RULE_SETUP
#line 89 "lib/vcsn/dot/scan.ll"
{
    BEGIN(INITIAL);
    return parser::make_ID(string_t{s}, loc);
  }
        YY_BREAK
case 28:
YY_RULE_SETUP
#line 94 "lib/vcsn/dot/scan.ll"
s.push_back(yytext[1]);
        YY_BREAK
case 29:
YY_RULE_SETUP
#line 95 "lib/vcsn/dot/scan.ll"
s.append(yytext, yyleng);
        YY_BREAK
case 30:
/* rule 30 can match eol */
YY_RULE_SETUP
#line 96 "lib/vcsn/dot/scan.ll"
LINE(yyleng); s.append(yytext, yyleng);
        YY_BREAK
case YY_STATE_EOF(SC_STRING):
#line 98 "lib/vcsn/dot/scan.ll"
{
    driver_.error(loc, "unexpected end of file in a string");
    BEGIN(INITIAL);
    return parser::make_ID(string_t{s}, loc);
  }
        YY_BREAK

/* Handling of the XML/HTML strings.  Initial < is eaten. */
case 31:
YY_RULE_SETUP
#line 106 "lib/vcsn/dot/scan.ll"
{
    if (--nesting == 0)
      {
        BEGIN(INITIAL);
        return parser::make_ID(string_t{s}, loc);
      }
    else
      s.push_back('>');
  }
        YY_BREAK
case 32:
YY_RULE_SETUP
#line 116 "lib/vcsn/dot/scan.ll"
++nesting; s.push_back('<');
        YY_BREAK
case 33:
YY_RULE_SETUP
#line 117 "lib/vcsn/dot/scan.ll"
s.append(yytext, yyleng);
        YY_BREAK
case 34:
/* rule 34 can match eol */
YY_RULE_SETUP
#line 118 "lib/vcsn/dot/scan.ll"
LINE(yyleng); s.append(yytext, yyleng);
        YY_BREAK
case YY_STATE_EOF(SC_XML):
#line 120 "lib/vcsn/dot/scan.ll"
{
    driver_.error(loc, "unexpected end of file in a XML string");
    BEGIN(INITIAL);
    return parser::make_ID(string_t{s}, loc);
  }
        YY_BREAK

case 35:
YY_RULE_SETUP
#line 127 "lib/vcsn/dot/scan.ll"
ECHO;
        YY_BREAK
#line 1106 "lib/vcsn/dot/scan.cc"
case YY_STATE_EOF(INITIAL):
case YY_STATE_EOF(SC_COMMENT):
        yyterminate();

        case YY_END_OF_BUFFER:
                {
                /* Amount of text matched not including the EOB char. */
                int yy_amount_of_matched_text = (int) (yy_cp - (yytext_ptr)) - 1;

                /* Undo the effects of YY_DO_BEFORE_ACTION. */
                *yy_cp = (yy_hold_char);
                YY_RESTORE_YY_MORE_OFFSET

                if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_NEW )
                        {
                        /* We're scanning a new file or input source.  It's
                         * possible that this happened because the user
                         * just pointed yyin at a new source and called
                         * yylex().  If so, then we have to assure
                         * consistency between YY_CURRENT_BUFFER and our
                         * globals.  Here is the right place to do so, because
                         * this is the first action (other than possibly a
                         * back-up) that will match for the new input source.
                         */
                        (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
/* %if-c-only */
/* %endif */
/* %if-c++-only */
                        YY_CURRENT_BUFFER_LVALUE->yy_input_file = yyin.rdbuf();
/* %endif */
                        YY_CURRENT_BUFFER_LVALUE->yy_buffer_status = YY_BUFFER_NORMAL;
                        }

                /* Note that here we test for yy_c_buf_p "<=" to the position
                 * of the first EOB in the buffer, since yy_c_buf_p will
                 * already have been incremented past the NUL character
                 * (since all states make transitions on EOB to the
                 * end-of-buffer state).  Contrast this with the test
                 * in input().
                 */
                if ( (yy_c_buf_p) <= &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] )
                        { /* This was really a NUL. */
                        yy_state_type yy_next_state;

                        (yy_c_buf_p) = (yytext_ptr) + yy_amount_of_matched_text;

                        yy_current_state = yy_get_previous_state(  );

                        /* Okay, we're now positioned to make the NUL
                         * transition.  We couldn't have
                         * yy_get_previous_state() go ahead and do it
                         * for us because it doesn't know how to deal
                         * with the possibility of jamming (and we don't
                         * want to build jamming into it because then it
                         * will run more slowly).
                         */

                        yy_next_state = yy_try_NUL_trans( yy_current_state );

                        yy_bp = (yytext_ptr) + YY_MORE_ADJ;

                        if ( yy_next_state )
                                {
                                /* Consume the NUL. */
                                yy_cp = ++(yy_c_buf_p);
                                yy_current_state = yy_next_state;
                                goto yy_match;
                                }

                        else
                                {
/* %% [14.0] code to do back-up for compressed tables and set up yy_cp goes here */
                                yy_cp = (yy_c_buf_p);
                                goto yy_find_action;
                                }
                        }

                else switch ( yy_get_next_buffer(  ) )
                        {
                        case EOB_ACT_END_OF_FILE:
                                {
                                (yy_did_buffer_switch_on_eof) = 0;

                                if ( yywrap(  ) )
                                        {
                                        /* Note: because we've taken care in
                                         * yy_get_next_buffer() to have set up
                                         * yytext, we can now set up
                                         * yy_c_buf_p so that if some total
                                         * hoser (like flex itself) wants to
                                         * call the scanner after we return the
                                         * YY_NULL, it'll still work - another
                                         * YY_NULL will get returned.
                                         */
                                        (yy_c_buf_p) = (yytext_ptr) + YY_MORE_ADJ;

                                        yy_act = YY_STATE_EOF(YY_START);
                                        goto do_action;
                                        }

                                else
                                        {
                                        if ( ! (yy_did_buffer_switch_on_eof) )
                                                YY_NEW_FILE;
                                        }
                                break;
                                }

                        case EOB_ACT_CONTINUE_SCAN:
                                (yy_c_buf_p) =
                                        (yytext_ptr) + yy_amount_of_matched_text;

                                yy_current_state = yy_get_previous_state(  );

                                yy_cp = (yy_c_buf_p);
                                yy_bp = (yytext_ptr) + YY_MORE_ADJ;
                                goto yy_match;

                        case EOB_ACT_LAST_MATCH:
                                (yy_c_buf_p) =
                                &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)];

                                yy_current_state = yy_get_previous_state(  );

                                yy_cp = (yy_c_buf_p);
                                yy_bp = (yytext_ptr) + YY_MORE_ADJ;
                                goto yy_find_action;
                        }
                break;
                }

        default:
                YY_FATAL_ERROR(
                        "fatal flex scanner internal error--no action found" );
        } /* end of action switch */
                } /* end of scanning one token */
        } /* end of user's declarations */
} /* end of yylex */
/* %ok-for-header */

/* %if-c++-only */
/* %not-for-header */

/* The contents of this function are C++ specific, so the () macro is not used.
 * This constructor simply maintains backward compatibility.
 * DEPRECATED
 */
yyFlexLexer::yyFlexLexer( FLEX_STD istream* arg_yyin, FLEX_STD ostream* arg_yyout ):
        yyin(arg_yyin ? arg_yyin->rdbuf() : std::cin.rdbuf()),
        yyout(arg_yyout ? arg_yyout->rdbuf() : std::cout.rdbuf())
{
        ctor_common();
}

/* The contents of this function are C++ specific, so the () macro is not used.
 */
yyFlexLexer::yyFlexLexer( std::istream& arg_yyin, std::ostream& arg_yyout ):
        yyin(arg_yyin.rdbuf()),
        yyout(arg_yyout.rdbuf())
{
        ctor_common();
}

/* The contents of this function are C++ specific, so the () macro is not used.
 */
void yyFlexLexer::ctor_common()
{
        yy_c_buf_p = 0;
        yy_init = 0;
        yy_start = 0;
        yy_flex_debug = 0;
        yylineno = 1;   // this will only get updated if %option yylineno

        yy_did_buffer_switch_on_eof = 0;

        yy_looking_for_trail_begin = 0;
        yy_more_flag = 0;
        yy_more_len = 0;
        yy_more_offset = yy_prev_more_offset = 0;

        yy_start_stack_ptr = yy_start_stack_depth = 0;
        yy_start_stack = NULL;

        yy_buffer_stack = 0;
        yy_buffer_stack_top = 0;
        yy_buffer_stack_max = 0;

        yy_state_buf = 0;

}

/* The contents of this function are C++ specific, so the () macro is not used.
 */
yyFlexLexer::~yyFlexLexer()
{
        delete [] yy_state_buf;
        yyfree(yy_start_stack  );
        yy_delete_buffer( YY_CURRENT_BUFFER );
        yyfree(yy_buffer_stack  );
}

/* The contents of this function are C++ specific, so the () macro is not used.
 */
void yyFlexLexer::switch_streams( std::istream& new_in, std::ostream& new_out )
{
        // was if( new_in )
        yy_delete_buffer( YY_CURRENT_BUFFER );
        yy_switch_to_buffer( yy_create_buffer( new_in, YY_BUF_SIZE  ) );

        // was if( new_out )
        yyout.rdbuf(new_out.rdbuf());
}

/* The contents of this function are C++ specific, so the () macro is not used.
 */
void yyFlexLexer::switch_streams( std::istream* new_in, std::ostream* new_out )
{
        if( ! new_in ) {
                new_in = &yyin;
        }

        if ( ! new_out ) {
                new_out = &yyout;
        }

        switch_streams(*new_in, *new_out);
}

#ifdef YY_INTERACTIVE
int yyFlexLexer::LexerInput( char* buf, int /* max_size */ )
#else
int yyFlexLexer::LexerInput( char* buf, int max_size )
#endif
{
        if ( yyin.eof() || yyin.fail() )
                return 0;

#ifdef YY_INTERACTIVE
        yyin.get( buf[0] );

        if ( yyin.eof() )
                return 0;

        if ( yyin.bad() )
                return -1;

        return 1;

#else
        (void) yyin.read( buf, max_size );

        if ( yyin.bad() )
                return -1;
        else
                return yyin.gcount();
#endif
}

void yyFlexLexer::LexerOutput( const char* buf, int size )
{
        (void) yyout.write( buf, size );
}
/* %ok-for-header */

/* %endif */

/* yy_get_next_buffer - try to read in a new buffer
 *
 * Returns a code representing an action:
 *      EOB_ACT_LAST_MATCH -
 *      EOB_ACT_CONTINUE_SCAN - continue scanning from current position
 *      EOB_ACT_END_OF_FILE - end of file
 */
/* %if-c-only */
/* %endif */
/* %if-c++-only */
int yyFlexLexer::yy_get_next_buffer()
/* %endif */
{
        char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf;
        char *source = (yytext_ptr);
        yy_size_t number_to_move, i;
        int ret_val;

        if ( (yy_c_buf_p) > &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars) + 1] )
                YY_FATAL_ERROR(
                "fatal flex scanner internal error--end of buffer missed" );

        if ( YY_CURRENT_BUFFER_LVALUE->yy_fill_buffer == 0 )
                { /* Don't try to fill the buffer, so this is an EOF. */
                if ( (yy_c_buf_p) - (yytext_ptr) - YY_MORE_ADJ == 1 )
                        {
                        /* We matched a single character, the EOB, so
                         * treat this as a final EOF.
                         */
                        return EOB_ACT_END_OF_FILE;
                        }

                else
                        {
                        /* We matched some text prior to the EOB, first
                         * process it.
                         */
                        return EOB_ACT_LAST_MATCH;
                        }
                }

        /* Try to read more data. */

        /* First move last chars to start of buffer. */
        number_to_move = (yy_size_t) ((yy_c_buf_p) - (yytext_ptr)) - 1;

        for ( i = 0; i < number_to_move; ++i )
                *(dest++) = *(source++);

        if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_EOF_PENDING )
                /* don't do the read, it's not guaranteed to return an EOF,
                 * just force an EOF
                 */
                YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars) = 0;

        else
                {
                        yy_size_t num_to_read =
                        YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;

                while ( num_to_read <= 0 )
                        { /* Not enough room in the buffer - grow it. */

                        /* just a shorter name for the current buffer */
                        YY_BUFFER_STATE b = YY_CURRENT_BUFFER_LVALUE;

                        int yy_c_buf_p_offset =
                                (int) ((yy_c_buf_p) - b->yy_ch_buf);

                        if ( b->yy_is_our_buffer )
                                {
                                yy_size_t new_size = b->yy_buf_size * 2;

                                if ( new_size <= 0 )
                                        b->yy_buf_size += b->yy_buf_size / 8;
                                else
                                        b->yy_buf_size *= 2;

                                b->yy_ch_buf = (char *)
                                        /* Include room in for 2 EOB chars. */
                                        yyrealloc((void *) b->yy_ch_buf,b->yy_buf_size + 2  );
                                }
                        else
                                /* Can't grow it, we don't own it. */
                                b->yy_ch_buf = 0;

                        if ( ! b->yy_ch_buf )
                                YY_FATAL_ERROR(
                                "fatal error - scanner input buffer overflow" );

                        (yy_c_buf_p) = &b->yy_ch_buf[yy_c_buf_p_offset];

                        num_to_read = YY_CURRENT_BUFFER_LVALUE->yy_buf_size -
                                                number_to_move - 1;

                        }

                if ( num_to_read > YY_READ_BUF_SIZE )
                        num_to_read = YY_READ_BUF_SIZE;

                /* Read in more data. */
                YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]),
                        (yy_n_chars), num_to_read );

                YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
                }

        if ( (yy_n_chars) == 0 )
                {
                if ( number_to_move == YY_MORE_ADJ )
                        {
                        ret_val = EOB_ACT_END_OF_FILE;
                        yyrestart( yyin  );
                        }

                else
                        {
                        ret_val = EOB_ACT_LAST_MATCH;
                        YY_CURRENT_BUFFER_LVALUE->yy_buffer_status =
                                YY_BUFFER_EOF_PENDING;
                        }
                }

        else
                ret_val = EOB_ACT_CONTINUE_SCAN;

        if ((yy_size_t) ((yy_n_chars) + number_to_move) > YY_CURRENT_BUFFER_LVALUE->yy_buf_size) {
                /* Extend the array by 50%, plus the number we really need. */
                yy_size_t new_size = (yy_n_chars) + number_to_move + ((yy_n_chars) >> 1);
                YY_CURRENT_BUFFER_LVALUE->yy_ch_buf = (char *) yyrealloc((void *) YY_CURRENT_BUFFER_LVALUE->yy_ch_buf,new_size  );
                if ( ! YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
                        YY_FATAL_ERROR( "out of dynamic memory in yy_get_next_buffer()" );
        }

        (yy_n_chars) += number_to_move;
        YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] = YY_END_OF_BUFFER_CHAR;
        YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars) + 1] = YY_END_OF_BUFFER_CHAR;

        (yytext_ptr) = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[0];

        return ret_val;
}

/* yy_get_previous_state - get the state just before the EOB char was reached */

/* %if-c-only */
/* %not-for-header */

/* %endif */
/* %if-c++-only */
    yy_state_type yyFlexLexer::yy_get_previous_state()
/* %endif */
{
        yy_state_type yy_current_state;
        char *yy_cp;
    
/* %% [15.0] code to get the start state into yy_current_state goes here */
        yy_current_state = (yy_start);

        for ( yy_cp = (yytext_ptr) + YY_MORE_ADJ; yy_cp < (yy_c_buf_p); ++yy_cp )
                {
/* %% [16.0] code to find the next state goes here */
                YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
                if ( yy_accept[yy_current_state] )
                        {
                        (yy_last_accepting_state) = yy_current_state;
                        (yy_last_accepting_cpos) = yy_cp;
                        }
                while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
                        {
                        yy_current_state = (int) yy_def[yy_current_state];
                        if ( yy_current_state >= 90 )
                                yy_c = yy_meta[(unsigned int) yy_c];
                        }
                yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
                }

        return yy_current_state;
}

/* yy_try_NUL_trans - try to make a transition on the NUL character
 *
 * synopsis
 *      next_state = yy_try_NUL_trans( current_state );
 */
/* %if-c-only */
/* %endif */
/* %if-c++-only */
    yy_state_type yyFlexLexer::yy_try_NUL_trans( yy_state_type yy_current_state )
/* %endif */
{
        int yy_is_jam;
    /* %% [17.0] code to find the next state, and perhaps do backing up, goes here */
        char *yy_cp = (yy_c_buf_p);

        YY_CHAR yy_c = 1;
        if ( yy_accept[yy_current_state] )
                {
                (yy_last_accepting_state) = yy_current_state;
                (yy_last_accepting_cpos) = yy_cp;
                }
        while ( yy_chk[yy_base[yy_current_state] + yy_c] != yy_current_state )
                {
                yy_current_state = (int) yy_def[yy_current_state];
                if ( yy_current_state >= 90 )
                        yy_c = yy_meta[(unsigned int) yy_c];
                }
        yy_current_state = yy_nxt[yy_base[yy_current_state] + (unsigned int) yy_c];
        yy_is_jam = (yy_current_state == 89);

                return yy_is_jam ? 0 : yy_current_state;
}

#ifndef YY_NO_UNPUT
/* %if-c-only */
/* %endif */
/* %if-c++-only */
    void yyFlexLexer::yyunput( int c, char* yy_bp)
/* %endif */
{
        char *yy_cp;
    
    yy_cp = (yy_c_buf_p);

        /* undo effects of setting up yytext */
        *yy_cp = (yy_hold_char);

        if ( yy_cp < YY_CURRENT_BUFFER_LVALUE->yy_ch_buf + 2 )
                { /* need to shift things up to make room */
                /* +2 for EOB chars. */
                yy_size_t number_to_move = (yy_n_chars) + 2;
                char *dest = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[
                                        YY_CURRENT_BUFFER_LVALUE->yy_buf_size + 2];
                char *source =
                                &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move];

                while ( source > YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
                        *--dest = *--source;

                yy_cp += (int) (dest - source);
                yy_bp += (int) (dest - source);
                YY_CURRENT_BUFFER_LVALUE->yy_n_chars =
                        (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_buf_size;

                if ( yy_cp < YY_CURRENT_BUFFER_LVALUE->yy_ch_buf + 2 )
                        YY_FATAL_ERROR( "flex scanner push-back overflow" );
                }

        *--yy_cp = (char) c;

/* %% [18.0] update yylineno here */

        (yytext_ptr) = yy_bp;
        (yy_hold_char) = *yy_cp;
        (yy_c_buf_p) = yy_cp;
}
/* %if-c-only */
/* %endif */
#endif

/* %if-c-only */
/* %endif */
/* %if-c++-only */
    int yyFlexLexer::yyinput()
/* %endif */
{
        int c;
    
        *(yy_c_buf_p) = (yy_hold_char);

        if ( *(yy_c_buf_p) == YY_END_OF_BUFFER_CHAR )
                {
                /* yy_c_buf_p now points to the character we want to return.
                 * If this occurs *before* the EOB characters, then it's a
                 * valid NUL; if not, then we've hit the end of the buffer.
                 */
                if ( (yy_c_buf_p) < &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[(yy_n_chars)] )
                        /* This was really a NUL. */
                        *(yy_c_buf_p) = '\0';

                else
                        { /* need more input */
                        yy_size_t offset = (yy_c_buf_p) - (yytext_ptr);
                        ++(yy_c_buf_p);

                        switch ( yy_get_next_buffer(  ) )
                                {
                                case EOB_ACT_LAST_MATCH:
                                        /* This happens because yy_g_n_b()
                                         * sees that we've accumulated a
                                         * token and flags that we need to
                                         * try matching the token before
                                         * proceeding.  But for input(),
                                         * there's no matching to consider.
                                         * So convert the EOB_ACT_LAST_MATCH
                                         * to EOB_ACT_END_OF_FILE.
                                         */

                                        /* Reset buffer status. */
                                        yyrestart( yyin );

                                        /*FALLTHROUGH*/

                                case EOB_ACT_END_OF_FILE:
                                        {
                                        if ( yywrap(  ) )
                                                return EOF;

                                        if ( ! (yy_did_buffer_switch_on_eof) )
                                                YY_NEW_FILE;
#ifdef __cplusplus
                                        return yyinput();
#else
                                        return input();
#endif
                                        }

                                case EOB_ACT_CONTINUE_SCAN:
                                        (yy_c_buf_p) = (yytext_ptr) + offset;
                                        break;
                                }
                        }
                }

        c = *(unsigned char *) (yy_c_buf_p);    /* cast for 8-bit char's */
        *(yy_c_buf_p) = '\0';   /* preserve yytext */
        (yy_hold_char) = *++(yy_c_buf_p);

/* %% [19.0] update BOL and yylineno */

        return c;
}
/* %if-c-only */
/* %endif */

/* %if-c-only */
/* %endif */
/* %if-c++-only */
    void yyFlexLexer::yyrestart( std::istream& input_file )
/* %endif */
{
    
        if ( ! YY_CURRENT_BUFFER ){
        yyensure_buffer_stack ();
                YY_CURRENT_BUFFER_LVALUE =
            yy_create_buffer( yyin, YY_BUF_SIZE );
        }

        yy_init_buffer( YY_CURRENT_BUFFER, input_file );
        yy_load_buffer_state(  );
}

/* %if-c++-only */
void yyFlexLexer::yyrestart( std::istream* input_file )
{
        yyrestart( *input_file );
}
/* %endif */

/* %if-c-only */
/* %endif */
/* %if-c++-only */
    void yyFlexLexer::yy_switch_to_buffer( YY_BUFFER_STATE new_buffer )
/* %endif */
{
    
        /* TODO. We should be able to replace this entire function body
         * with
         *              yypop_buffer_state();
         *              yypush_buffer_state(new_buffer);
     */
        yyensure_buffer_stack ();
        if ( YY_CURRENT_BUFFER == new_buffer )
                return;

        if ( YY_CURRENT_BUFFER )
                {
                /* Flush out information for old buffer. */
                *(yy_c_buf_p) = (yy_hold_char);
                YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = (yy_c_buf_p);
                YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
                }

        YY_CURRENT_BUFFER_LVALUE = new_buffer;
        yy_load_buffer_state(  );

        /* We don't actually know whether we did this switch during
         * EOF (yywrap()) processing, but the only time this flag
         * is looked at is after yywrap() is called, so it's safe
         * to go ahead and always set it.
         */
        (yy_did_buffer_switch_on_eof) = 1;
}

/* %if-c-only */
/* %endif */
/* %if-c++-only */
    void yyFlexLexer::yy_load_buffer_state()
/* %endif */
{
        (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
        (yytext_ptr) = (yy_c_buf_p) = YY_CURRENT_BUFFER_LVALUE->yy_buf_pos;
/* %if-c-only */
/* %endif */
/* %if-c++-only */
        yyin.rdbuf(YY_CURRENT_BUFFER_LVALUE->yy_input_file);
/* %endif */
        (yy_hold_char) = *(yy_c_buf_p);
}

/* %if-c-only */
/* %endif */
/* %if-c++-only */
    YY_BUFFER_STATE yyFlexLexer::yy_create_buffer( std::istream& file, int size )
/* %endif */
{
        YY_BUFFER_STATE b;
    
        b = (YY_BUFFER_STATE) yyalloc(sizeof( struct yy_buffer_state )  );
        if ( ! b )
                YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );

        b->yy_buf_size = (yy_size_t)size;

        /* yy_ch_buf has to be 2 characters longer than the size given because
         * we need to put in 2 end-of-buffer characters.
         */
        b->yy_ch_buf = (char *) yyalloc(b->yy_buf_size + 2  );
        if ( ! b->yy_ch_buf )
                YY_FATAL_ERROR( "out of dynamic memory in yy_create_buffer()" );

        b->yy_is_our_buffer = 1;

        yy_init_buffer( b, file );

        return b;
}

/* %if-c++-only */
        YY_BUFFER_STATE yyFlexLexer::yy_create_buffer( std::istream* file, int size )
{
        return yy_create_buffer( *file, size );
}
/* %endif */

/* %if-c-only */
/* %endif */
/* %if-c++-only */
    void yyFlexLexer::yy_delete_buffer( YY_BUFFER_STATE b )
/* %endif */
{
    
        if ( ! b )
                return;

        if ( b == YY_CURRENT_BUFFER ) /* Not sure if we should pop here. */
                YY_CURRENT_BUFFER_LVALUE = (YY_BUFFER_STATE) 0;

        if ( b->yy_is_our_buffer )
                yyfree((void *) b->yy_ch_buf  );

        yyfree((void *) b  );
}

/* Initializes or reinitializes a buffer.
 * This function is sometimes called more than once on the same buffer,
 * such as during a yyrestart() or at EOF.
 */
/* %if-c-only */
/* %endif */
/* %if-c++-only */
    void yyFlexLexer::yy_init_buffer( YY_BUFFER_STATE b, std::istream& file )
/* %endif */

{
        int oerrno = errno;
    
        yy_flush_buffer( b );

/* %if-c-only */
/* %endif */
/* %if-c++-only */
        b->yy_input_file = file.rdbuf();
/* %endif */
        b->yy_fill_buffer = 1;

    /* If b is the current buffer, then yy_init_buffer was _probably_
     * called from yyrestart() or through yy_get_next_buffer.
     * In that case, we don't want to reset the lineno or column.
     */
    if (b != YY_CURRENT_BUFFER){
        b->yy_bs_lineno = 1;
        b->yy_bs_column = 0;
    }

/* %if-c-only */
/* %endif */
/* %if-c++-only */
        b->yy_is_interactive = 0;
/* %endif */
        errno = oerrno;
}

/* %if-c-only */
/* %endif */
/* %if-c++-only */
    void yyFlexLexer::yy_flush_buffer( YY_BUFFER_STATE b )
/* %endif */
{
        if ( ! b )
                return;

        b->yy_n_chars = 0;

        /* We always need two end-of-buffer characters.  The first causes
         * a transition to the end-of-buffer state.  The second causes
         * a jam in that state.
         */
        b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR;
        b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR;

        b->yy_buf_pos = &b->yy_ch_buf[0];

        b->yy_at_bol = 1;
        b->yy_buffer_status = YY_BUFFER_NEW;

        if ( b == YY_CURRENT_BUFFER )
                yy_load_buffer_state(  );
}

/* %if-c-or-c++ */
/* %if-c-only */
/* %endif */
/* %if-c++-only */
void yyFlexLexer::yypush_buffer_state (YY_BUFFER_STATE new_buffer)
/* %endif */
{
        if (new_buffer == NULL)
                return;

        yyensure_buffer_stack();

        /* This block is copied from yy_switch_to_buffer. */
        if ( YY_CURRENT_BUFFER )
                {
                /* Flush out information for old buffer. */
                *(yy_c_buf_p) = (yy_hold_char);
                YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = (yy_c_buf_p);
                YY_CURRENT_BUFFER_LVALUE->yy_n_chars = (yy_n_chars);
                }

        /* Only push if top exists. Otherwise, replace top. */
        if (YY_CURRENT_BUFFER)
                (yy_buffer_stack_top)++;
        YY_CURRENT_BUFFER_LVALUE = new_buffer;

        /* copied from yy_switch_to_buffer. */
        yy_load_buffer_state(  );
        (yy_did_buffer_switch_on_eof) = 1;
}
/* %endif */

/* %if-c-or-c++ */
/* %if-c-only */
/* %endif */
/* %if-c++-only */
void yyFlexLexer::yypop_buffer_state (void)
/* %endif */
{
        if (!YY_CURRENT_BUFFER)
                return;

        yy_delete_buffer(YY_CURRENT_BUFFER );
        YY_CURRENT_BUFFER_LVALUE = NULL;
        if ((yy_buffer_stack_top) > 0)
                --(yy_buffer_stack_top);

        if (YY_CURRENT_BUFFER) {
                yy_load_buffer_state(  );
                (yy_did_buffer_switch_on_eof) = 1;
        }
}
/* %endif */

/* %if-c-or-c++ */
/* Allocates the stack if it does not exist.
 *  Guarantees space for at least one push.
 */
/* %if-c-only */
/* %endif */
/* %if-c++-only */
void yyFlexLexer::yyensure_buffer_stack(void)
/* %endif */
{
        yy_size_t num_to_alloc;
    
        if (!(yy_buffer_stack)) {

                /* First allocation is just for 2 elements, since we don't know if this
                 * scanner will even need a stack. We use 2 instead of 1 to avoid an
                 * immediate realloc on the next call.
         */
                num_to_alloc = 1; // After all that talk, this was set to 1 anyways...
                (yy_buffer_stack) = (struct yy_buffer_state**)yyalloc
                                                                (num_to_alloc * sizeof(struct yy_buffer_state*)
                                                                );
                if ( ! (yy_buffer_stack) )
                        YY_FATAL_ERROR( "out of dynamic memory in yyensure_buffer_stack()" );
                                                                  
                memset((yy_buffer_stack), 0, num_to_alloc * sizeof(struct yy_buffer_state*));
                                
                (yy_buffer_stack_max) = num_to_alloc;
                (yy_buffer_stack_top) = 0;
                return;
        }

        if ((yy_buffer_stack_top) >= ((yy_buffer_stack_max)) - 1){

                /* Increase the buffer to prepare for a possible push. */
                yy_size_t grow_size = 8 /* arbitrary grow size */;

                num_to_alloc = (yy_buffer_stack_max) + grow_size;
                (yy_buffer_stack) = (struct yy_buffer_state**)yyrealloc
                                                                ((yy_buffer_stack),
                                                                num_to_alloc * sizeof(struct yy_buffer_state*)
                                                                );
                if ( ! (yy_buffer_stack) )
                        YY_FATAL_ERROR( "out of dynamic memory in yyensure_buffer_stack()" );

                /* zero only the new slots.*/
                memset((yy_buffer_stack) + (yy_buffer_stack_max), 0, grow_size * sizeof(struct yy_buffer_state*));
                (yy_buffer_stack_max) = num_to_alloc;
        }
}
/* %endif */

/* %if-c-only */
/* %endif */

/* %if-c-only */
/* %endif */

/* %if-c-only */
/* %endif */

/* %if-c-only */
/* %endif */
/* %if-c++-only */
    void yyFlexLexer::yy_push_state( int _new_state )
/* %endif */
{
        if ( (yy_start_stack_ptr) >= (yy_start_stack_depth) )
                {
                yy_size_t new_size;

                (yy_start_stack_depth) += YY_START_STACK_INCR;
                new_size = (yy_start_stack_depth) * sizeof( int );

                if ( ! (yy_start_stack) )
                        (yy_start_stack) = (int *) yyalloc(new_size  );

                else
                        (yy_start_stack) = (int *) yyrealloc((void *) (yy_start_stack),new_size  );

                if ( ! (yy_start_stack) )
                        YY_FATAL_ERROR( "out of memory expanding start-condition stack" );
                }

        (yy_start_stack)[(yy_start_stack_ptr)++] = YY_START;

        BEGIN(_new_state);
}

/* %if-c-only */
/* %endif */
/* %if-c++-only */
    void yyFlexLexer::yy_pop_state()
/* %endif */
{
        if ( --(yy_start_stack_ptr) < 0 )
                YY_FATAL_ERROR( "start-condition stack underflow" );

        BEGIN((yy_start_stack)[(yy_start_stack_ptr)]);
}

/* %if-c-only */
/* %endif */
/* %if-c++-only */
    int yyFlexLexer::yy_top_state()
/* %endif */
{
        return (yy_start_stack)[(yy_start_stack_ptr) - 1];
}

#ifndef YY_EXIT_FAILURE
#define YY_EXIT_FAILURE 2
#endif

/* %if-c-only */
/* %endif */
/* %if-c++-only */
void yyFlexLexer::LexerError( yyconst char msg[] )
{
        std::cerr << msg << std::endl;
        exit( YY_EXIT_FAILURE );
}
/* %endif */

/* Redefine yyless() so it works in section 3 code. */

#undef yyless
#define yyless(n) \
        do \
                { \
                /* Undo effects of setting up yytext. */ \
        int yyless_macro_arg = (n); \
        YY_LESS_LINENO(yyless_macro_arg);\
                yytext[yyleng] = (yy_hold_char); \
                (yy_c_buf_p) = yytext + yyless_macro_arg; \
                (yy_hold_char) = *(yy_c_buf_p); \
                *(yy_c_buf_p) = '\0'; \
                yyleng = yyless_macro_arg; \
                } \
        while ( 0 )

/* Accessor  methods (get/set functions) to struct members. */

/* %if-c-only */
/* %if-reentrant */
/* %endif */
/* %if-reentrant */
/* %endif */
/* %endif */

/* %if-reentrant */
/* %if-bison-bridge */
/* %endif */
/* %endif if-c-only */

/* %if-c-only */
/* %endif */

/* %if-c-only SNIP! this currently causes conflicts with the c++ scanner */
/* %if-reentrant */
/* %endif */
/* %endif */

/*
 * Internal utility routines.
 */

#ifndef yytext_ptr
static void yy_flex_strncpy (char* s1, yyconst char * s2, int n )
{
                
        int i;
        for ( i = 0; i < n; ++i )
                s1[i] = s2[i];
}
#endif

#ifdef YY_NEED_STRLEN
static int yy_flex_strlen (yyconst char * s )
{
        int n;
        for ( n = 0; s[n]; ++n )
                ;

        return n;
}
#endif

void *yyalloc (yy_size_t  size )
{
                        return (void *) malloc( size );
}

void *yyrealloc  (void * ptr, yy_size_t  size )
{
                
        /* The cast to (char *) in the following accommodates both
         * implementations that use char* generic pointers, and those
         * that use void* generic pointers.  It works with the latter
         * because both ANSI C and C++ allow castless assignment from
         * any pointer type to void*, and deal with argument conversions
         * as though doing an assignment.
         */
        return (void *) realloc( (char *) ptr, size );
}

void yyfree (void * ptr )
{
                        free( (char *) ptr );   /* see yyrealloc() for (char *) cast */
}

/* %if-tables-serialization definitions */
/* %define-yytables   The name for this specific scanner's tables. */
#define YYTABLES_NAME "yytables"
/* %endif */

/* %ok-for-header */

#line 127 "lib/vcsn/dot/scan.ll"


// Do not use %option noyywrap, because then flex generates the
// same definition of yywrap, but outside the namespaces.
int yyFlexLexer::yywrap() { return 1; }

// Beware of the dummy Flex interface.  One would like to use:
//
// yypush_buffer_state(yy_create_buffer(yyin, YY_BUF_SIZE));
//
// and
//
// yypush_buffer_state(yy_scan_bytes(e.c_str(), e.size()));
//
// but the latter (yy_scan_bytes) calls yy_switch_to_buffer, so in
// effect calling yypush_buffer_state saves the new state instead
// of the old one.
//
// So do it in two steps, quite different from what is suggested
// in the documentation: save the old context, switch to the new
// one.

void yyFlexLexer::scan_open_(std::istream& f)
{
  set_debug(!!getenv("YYSCAN"));
  yypush_buffer_state(YY_CURRENT_BUFFER);
  yy_switch_to_buffer(yy_create_buffer(&f, YY_BUF_SIZE));
}

void yyFlexLexer::scan_close_()
{
  yypop_buffer_state();
}

YY_FLEX_NAMESPACE_END


// Local Variables:
// mode: C++
// End: