Add native Windows binary for bison.

bison/src/bison/2.4.1/bison-2.4.1-src/examples/calc++/calc++-scanner.cc

+
+#line 3 "calc++-scanner.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 5
+#define YY_FLEX_SUBMINOR_VERSION 35
+#if YY_FLEX_SUBMINOR_VERSION > 0
+#define FLEX_BETA
+#endif
+
+/* %if-c++-only */
+/* %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 */
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+/* %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;
+#endif /* ! C99 */
+
+/* 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 /* ! FLEXINT_H */
+
+/* %endif */
+
+/* %if-c++-only */
+/* %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
+#define YY_BUF_SIZE 16384
+#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
+
+/* %if-not-reentrant */
+extern int yyleng;
+/* %endif */
+
+/* %if-c-only */
+/* %if-not-reentrant */
+extern FILE *yyin, *yyout;
+/* %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)
+    
+/* 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_TYPEDEF_YY_SIZE_T
+#define YY_TYPEDEF_YY_SIZE_T
+typedef size_t yy_size_t;
+#endif
+
+#ifndef YY_STRUCT_YY_BUFFER_STATE
+#define YY_STRUCT_YY_BUFFER_STATE
+struct yy_buffer_state
+        {
+/* %if-c-only */
+        FILE *yy_input_file;
+/* %endif */
+
+/* %if-c++-only */
+/* %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.
+         */
+        int 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; /**< The line count. */
+    int yy_bs_column; /**< The column count. */
+    
+        /* 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 */
+
+/* Stack of input buffers. */
+static size_t yy_buffer_stack_top = 0; /**< index of top of stack. */
+static size_t yy_buffer_stack_max = 0; /**< capacity of stack. */
+static YY_BUFFER_STATE * yy_buffer_stack = 0; /**< Stack as an array. */
+/* %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 */
+
+/* yy_hold_char holds the character lost when yytext is formed. */
+static char yy_hold_char;
+static int yy_n_chars;          /* number of characters read into yy_ch_buf */
+int yyleng;
+
+/* Points to current character in buffer. */
+static char *yy_c_buf_p = (char *) 0;
+static int yy_init = 0;         /* whether we need to initialize */
+static int yy_start = 0;        /* start state number */
+
+/* Flag which is used to allow yywrap()'s to do buffer switches
+ * instead of setting up a fresh yyin.  A bit of a hack ...
+ */
+static int yy_did_buffer_switch_on_eof;
+/* %ok-for-header */
+
+/* %endif */
+
+void yyrestart (FILE *input_file  );
+void yy_switch_to_buffer (YY_BUFFER_STATE new_buffer  );
+YY_BUFFER_STATE yy_create_buffer (FILE *file,int size  );
+void yy_delete_buffer (YY_BUFFER_STATE b  );
+void yy_flush_buffer (YY_BUFFER_STATE b  );
+void yypush_buffer_state (YY_BUFFER_STATE new_buffer  );
+void yypop_buffer_state (void );
+
+static void yyensure_buffer_stack (void );
+static void yy_load_buffer_state (void );
+static void yy_init_buffer (YY_BUFFER_STATE b,FILE *file  );
+
+#define YY_FLUSH_BUFFER yy_flush_buffer(YY_CURRENT_BUFFER )
+
+YY_BUFFER_STATE yy_scan_buffer (char *base,yy_size_t size  );
+YY_BUFFER_STATE yy_scan_string (yyconst char *yy_str  );
+YY_BUFFER_STATE yy_scan_bytes (yyconst char *bytes,int len  );
+
+/* %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 yywrap(n) 1
+#define YY_SKIP_YYWRAP
+
+#define FLEX_DEBUG
+
+typedef unsigned char YY_CHAR;
+
+FILE *yyin = (FILE *) 0, *yyout = (FILE *) 0;
+
+typedef int yy_state_type;
+
+extern int yylineno;
+
+int yylineno = 1;
+
+extern char *yytext;
+#define yytext_ptr yytext
+
+/* %if-c-only Standard (non-C++) definition */
+
+static yy_state_type yy_get_previous_state (void );
+static yy_state_type yy_try_NUL_trans (yy_state_type current_state  );
+static int yy_get_next_buffer (void );
+static void yy_fatal_error (yyconst char msg[]  );
+
+/* %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 8
+#define YY_END_OF_BUFFER 9
+/* 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[17] =
+    {   0,
+        0,    0,    9,    7,    1,    2,    3,    5,    7,    6,
+        1,    2,    5,    4,    6,    0
+    } ;
+
+static yyconst flex_int32_t 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,    1,    1,    1,    1,    1,    1,    1,
+        1,    4,    4,    1,    4,    1,    4,    5,    5,    5,
+        5,    5,    5,    5,    5,    5,    5,    6,    1,    1,
+        7,    1,    1,    1,    8,    8,    8,    8,    8,    8,
+        8,    8,    8,    8,    8,    8,    8,    8,    8,    8,
+        8,    8,    8,    8,    8,    8,    8,    8,    8,    8,
+        1,    1,    1,    1,    9,    1,    8,    8,    8,    8,
+
+        8,    8,    8,    8,    8,    8,    8,    8,    8,    8,
+        8,    8,    8,    8,    8,    8,    8,    8,    8,    8,
+        8,    8,    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,    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,
+        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,    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
+    } ;
+
+static yyconst flex_int32_t yy_meta[10] =
+    {   0,
+        1,    1,    1,    1,    2,    1,    1,    2,    2
+    } ;
+
+static yyconst flex_int16_t yy_base[18] =
+    {   0,
+        0,    0,   18,   19,   15,   13,   19,   10,    7,    0,
+       11,    9,    6,   19,    0,   19,    8
+    } ;
+
+static yyconst flex_int16_t yy_def[18] =
+    {   0,
+       16,    1,   16,   16,   16,   16,   16,   16,   16,   17,
+       16,   16,   16,   16,   17,    0,   16
+    } ;
+
+static yyconst flex_int16_t yy_nxt[29] =
+    {   0,
+        4,    5,    6,    7,    8,    9,    4,   10,    4,   15,
+       13,   12,   11,   14,   13,   12,   11,   16,    3,   16,
+       16,   16,   16,   16,   16,   16,   16,   16
+    } ;
+
+static yyconst flex_int16_t yy_chk[29] =
+    {   0,
+        1,    1,    1,    1,    1,    1,    1,    1,    1,   17,
+       13,   12,   11,    9,    8,    6,    5,    3,   16,   16,
+       16,   16,   16,   16,   16,   16,   16,   16
+    } ;
+
+static yy_state_type yy_last_accepting_state;
+static char *yy_last_accepting_cpos;
+
+extern int yy_flex_debug;
+int yy_flex_debug = 1;
+
+static yyconst flex_int16_t yy_rule_linenum[8] =
+    {   0,
+       35,   36,   42,   43,   44,   52,   53
+    } ;
+
+/* 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
+char *yytext;
+#line 1 "calc++-scanner.ll"
+#line 2 "calc++-scanner.ll"
+# include <cstdlib>
+# include <errno.h>
+# include <limits.h>
+# include <string>
+# include "calc++-driver.hh"
+# include "calc++-parser.hh"
+
+/* Work around an incompatibility in flex (at least versions
+   2.5.31 through 2.5.33): it generates code that does
+   not conform to C89.  See Debian bug 333231
+   <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=333231>.  */
+# undef yywrap
+# define yywrap() 1
+
+/* By default yylex returns int, we use token_type.
+   Unfortunately yyterminate by default returns 0, which is
+   not of token_type.  */
+#define yyterminate() return token::END
+#line 29 "calc++-scanner.ll"
+# define YY_USER_ACTION  yylloc->columns (yyleng);
+#line 568 "calc++-scanner.cc"
+
+#define INITIAL 0
+
+#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 */
+#include <unistd.h>
+/* %endif */
+/* %if-c++-only */
+/* %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 */
+
+static int yy_init_globals (void );
+
+/* %endif */
+/* %if-reentrant */
+/* %endif */
+/* %endif End reentrant structures and macros. */
+
+/* Accessor methods to globals.
+   These are made visible to non-reentrant scanners for convenience. */
+
+int yylex_destroy (void );
+
+int yyget_debug (void );
+
+void yyset_debug (int debug_flag  );
+
+YY_EXTRA_TYPE yyget_extra (void );
+
+void yyset_extra (YY_EXTRA_TYPE user_defined  );
+
+FILE *yyget_in (void );
+
+void yyset_in  (FILE * in_str  );
+
+FILE *yyget_out (void );
+
+void yyset_out  (FILE * out_str  );
+
+int yyget_leng (void );
+
+char *yyget_text (void );
+
+int yyget_lineno (void );
+
+void yyset_lineno (int line_number  );
+
+/* %if-bison-bridge */
+/* %endif */
+
+/* Macros after this point can all be overridden by user definitions in
+ * section 1.
+ */
+
+#ifndef YY_SKIP_YYWRAP
+#ifdef __cplusplus
+extern "C" int yywrap (void );
+#else
+extern int yywrap (void );
+#endif
+#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 */
+
+#ifdef __cplusplus
+static int yyinput (void );
+#else
+static int input (void );
+#endif
+/* %ok-for-header */
+
+/* %endif */
+#endif
+
+/* %if-c-only */
+
+/* %endif */
+
+/* Amount of stuff to slurp up with each read. */
+#ifndef YY_READ_BUF_SIZE
+#define YY_READ_BUF_SIZE 8192
+#endif
+
+/* Copy whatever the last rule matched to the standard output. */
+#ifndef ECHO
+/* %if-c-only Standard (non-C++) definition */
+/* This used to be an fputs(), but since the string might contain NUL's,
+ * we now use fwrite().
+ */
+#define ECHO fwrite( yytext, yyleng, 1, yyout )
+/* %endif */
+/* %if-c++-only C++ definition */
+/* %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 ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \
+                { \
+                int c = '*'; \
+                int n; \
+                for ( n = 0; n < max_size && \
+                             (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
+                        buf[n] = (char) c; \
+                if ( c == '\n' ) \
+                        buf[n++] = (char) c; \
+                if ( c == EOF && ferror( yyin ) ) \
+                        YY_FATAL_ERROR( "input in flex scanner failed" ); \
+                result = n; \
+                } \
+        else \
+                { \
+                errno=0; \
+                while ( (result = fread(buf, 1, max_size, yyin))==0 && ferror(yyin)) \
+                        { \
+                        if( errno != EINTR) \
+                                { \
+                                YY_FATAL_ERROR( "input in flex scanner failed" ); \
+                                break; \
+                                } \
+                        errno=0; \
+                        clearerr(yyin); \
+                        } \
+                }\
+\
+/* %if-c++-only C++ definition \ */\
+/* %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 */
+#define YY_FATAL_ERROR(msg) yy_fatal_error( msg )
+/* %endif */
+/* %if-c++-only */
+/* %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 */
+
+extern int yylex (void);
+
+#define YY_DECL int yylex (void)
+/* %endif */
+/* %if-c++-only C++ definition */
+/* %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 break;
+#endif
+
+/* %% [6.0] YY_RULE_SETUP definition goes here */
+#define YY_RULE_SETUP \
+        YY_USER_ACTION
+
+/* %not-for-header */
+
+/** The main scanner function which does all the work.
+ */
+YY_DECL
+{
+        register yy_state_type yy_current_state;
+        register char *yy_cp, *yy_bp;
+        register int yy_act;
+    
+/* %% [7.0] user's declarations go here */
+#line 31 "calc++-scanner.ll"
+
+
+  yylloc->step ();
+
+#line 813 "calc++-scanner.cc"
+
+        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 */
+                        yyin = stdin;
+/* %endif */
+/* %if-c++-only */
+/* %endif */
+
+                if ( ! yyout )
+/* %if-c-only */
+                        yyout = stdout;
+/* %endif */
+/* %if-c++-only */
+/* %endif */
+
+                if ( ! YY_CURRENT_BUFFER ) {
+                        yyensure_buffer_stack ();
+                        YY_CURRENT_BUFFER_LVALUE =
+                                yy_create_buffer(yyin,YY_BUF_SIZE );
+                }
+
+                yy_load_buffer_state( );
+                }
+
+        while ( 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
+                        {
+                        register 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 >= 17 )
+                                        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_current_state != 16 );
+                yy_cp = (yy_last_accepting_cpos);
+                yy_current_state = (yy_last_accepting_state);
+
+yy_find_action:
+/* %% [10.0] code to find the action number goes here */
+                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 )
+                                fprintf( stderr, "--scanner backing up\n" );
+                        else if ( yy_act < 8 )
+                                fprintf( stderr, "--accepting rule at line %ld (\"%s\")\n",
+                                         (long)yy_rule_linenum[yy_act], yytext );
+                        else if ( yy_act == 8 )
+                                fprintf( stderr, "--accepting default rule (\"%s\")\n",
+                                         yytext );
+                        else if ( yy_act == 9 )
+                                fprintf( stderr, "--(end of buffer or a NUL)\n" );
+                        else
+                                fprintf( stderr, "--EOF (start condition %d)\n", YY_START );
+                        }
+
+                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;
+
+case 1:
+YY_RULE_SETUP
+#line 35 "calc++-scanner.ll"
+yylloc->step ();
+        YY_BREAK
+case 2:
+/* rule 2 can match eol */
+YY_RULE_SETUP
+#line 36 "calc++-scanner.ll"
+yylloc->lines (yyleng); yylloc->step ();
+        YY_BREAK
+
+  typedef yy::calcxx_parser::token token;
+
+/* Convert ints to the actual type of tokens.  */
+case 3:
+YY_RULE_SETUP
+#line 42 "calc++-scanner.ll"
+return yy::calcxx_parser::token_type (yytext[0]);
+        YY_BREAK
+case 4:
+YY_RULE_SETUP
+#line 43 "calc++-scanner.ll"
+return token::ASSIGN;
+        YY_BREAK
+case 5:
+YY_RULE_SETUP
+#line 44 "calc++-scanner.ll"
+{
+  errno = 0;
+  long n = strtol (yytext, NULL, 10);
+  if (! (INT_MIN <= n && n <= INT_MAX && errno != ERANGE))
+    driver.error (*yylloc, "integer is out of range");
+  yylval->ival = n;
+  return token::NUMBER;
+}
+        YY_BREAK
+case 6:
+YY_RULE_SETUP
+#line 52 "calc++-scanner.ll"
+yylval->sval = new std::string (yytext); return token::IDENTIFIER;
+        YY_BREAK
+case 7:
+YY_RULE_SETUP
+#line 53 "calc++-scanner.ll"
+driver.error (*yylloc, "invalid character");
+        YY_BREAK
+case 8:
+YY_RULE_SETUP
+#line 54 "calc++-scanner.ll"
+ECHO;
+        YY_BREAK
+#line 975 "calc++-scanner.cc"
+case YY_STATE_EOF(INITIAL):
+        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;
+                        YY_CURRENT_BUFFER_LVALUE->yy_input_file = yyin;
+                        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_last_accepting_cpos);
+                                yy_current_state = (yy_last_accepting_state);
+                                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 yylex */
+/* %ok-for-header */
+
+/* %if-c++-only */
+/* %not-for-header */
+
+/* %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 */
+static int yy_get_next_buffer (void)
+/* %endif */
+/* %if-c++-only */
+/* %endif */
+{
+        register char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf;
+        register char *source = (yytext_ptr);
+        register int 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 = (int) ((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
+                {
+                        int 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;
+
+                        int yy_c_buf_p_offset =
+                                (int) ((yy_c_buf_p) - b->yy_ch_buf);
+
+                        if ( b->yy_is_our_buffer )
+                                {
+                                int 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), (size_t) 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 */
+
+    static yy_state_type yy_get_previous_state (void)
+/* %endif */
+/* %if-c++-only */
+/* %endif */
+{
+        register yy_state_type yy_current_state;
+        register 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 */
+                register 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 >= 17 )
+                                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 */
+    static yy_state_type yy_try_NUL_trans  (yy_state_type yy_current_state )
+/* %endif */
+/* %if-c++-only */
+/* %endif */
+{
+        register int yy_is_jam;
+    /* %% [17.0] code to find the next state, and perhaps do backing up, goes here */
+        register char *yy_cp = (yy_c_buf_p);
+
+        register 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 >= 17 )
+                        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 == 16);
+
+        return yy_is_jam ? 0 : yy_current_state;
+}
+
+/* %if-c-only */
+
+/* %endif */
+
+/* %if-c-only */
+#ifndef YY_NO_INPUT
+#ifdef __cplusplus
+    static int yyinput (void)
+#else
+    static int input  (void)
+#endif
+
+/* %endif */
+/* %if-c++-only */
+/* %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 */
+                        int 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  /* ifndef YY_NO_INPUT */
+/* %endif */
+
+/** Immediately switch to a different input stream.
+ * @param input_file A readable stream.
+ * 
+ * @note This function does not reset the start condition to @c INITIAL .
+ */
+/* %if-c-only */
+    void yyrestart  (FILE * input_file )
+/* %endif */
+/* %if-c++-only */
+/* %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( );
+}
+
+/** Switch to a different input buffer.
+ * @param new_buffer The new input buffer.
+ * 
+ */
+/* %if-c-only */
+    void yy_switch_to_buffer  (YY_BUFFER_STATE  new_buffer )
+/* %endif */
+/* %if-c++-only */
+/* %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 */
+static void yy_load_buffer_state  (void)
+/* %endif */
+/* %if-c++-only */
+/* %endif */
+{
+        (yy_n_chars) = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
+        (yytext_ptr) = (yy_c_buf_p) = YY_CURRENT_BUFFER_LVALUE->yy_buf_pos;
+        yyin = YY_CURRENT_BUFFER_LVALUE->yy_input_file;
+        (yy_hold_char) = *(yy_c_buf_p);
+}
+
+/** Allocate and initialize an input buffer state.
+ * @param file A readable stream.
+ * @param size The character buffer size in bytes. When in doubt, use @c YY_BUF_SIZE.
+ * 
+ * @return the allocated buffer state.
+ */
+/* %if-c-only */
+    YY_BUFFER_STATE yy_create_buffer  (FILE * file, int  size )
+/* %endif */
+/* %if-c++-only */
+/* %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 = 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;
+}
+
+/** Destroy the buffer.
+ * @param b a buffer created with yy_create_buffer()
+ * 
+ */
+/* %if-c-only */
+    void yy_delete_buffer (YY_BUFFER_STATE  b )
+/* %endif */
+/* %if-c++-only */
+/* %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  );
+}
+
+/* %if-c-only */
+
+#ifndef __cplusplus
+extern int isatty (int );
+#endif /* __cplusplus */
+    
+/* %endif */
+
+/* %if-c++-only */
+/* %endif */
+
+/* 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 */
+    static void yy_init_buffer  (YY_BUFFER_STATE  b, FILE * file )
+/* %endif */
+/* %if-c++-only */
+/* %endif */
+
+{
+        int oerrno = errno;
+    
+        yy_flush_buffer(b );
+
+        b->yy_input_file = file;
+        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 */
+
+        b->yy_is_interactive = file ? (isatty( fileno(file) ) > 0) : 0;
+    
+/* %endif */
+/* %if-c++-only */
+/* %endif */
+        errno = oerrno;
+}
+
+/** Discard all buffered characters. On the next scan, YY_INPUT will be called.
+ * @param b the buffer state to be flushed, usually @c YY_CURRENT_BUFFER.
+ * 
+ */
+/* %if-c-only */
+    void yy_flush_buffer (YY_BUFFER_STATE  b )
+/* %endif */
+/* %if-c++-only */
+/* %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++ */
+/** Pushes the new state onto the stack. The new state becomes
+ *  the current state. This function will allocate the stack
+ *  if necessary.
+ *  @param new_buffer The new state.
+ *  
+ */
+/* %if-c-only */
+void yypush_buffer_state (YY_BUFFER_STATE new_buffer )
+/* %endif */
+/* %if-c++-only */
+/* %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++ */
+/** Removes and deletes the top of the stack, if present.
+ *  The next element becomes the new top.
+ *  
+ */
+/* %if-c-only */
+void yypop_buffer_state (void)
+/* %endif */
+/* %if-c++-only */
+/* %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 */
+static void yyensure_buffer_stack (void)
+/* %endif */
+/* %if-c++-only */
+/* %endif */
+{
+        int 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;
+                (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. */
+                int 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 */
+/** Setup the input buffer state to scan directly from a user-specified character buffer.
+ * @param base the character buffer
+ * @param size the size in bytes of the character buffer
+ * 
+ * @return the newly allocated buffer state object. 
+ */
+YY_BUFFER_STATE yy_scan_buffer  (char * base, yy_size_t  size )
+{
+        YY_BUFFER_STATE b;
+    
+        if ( size < 2 ||
+             base[size-2] != YY_END_OF_BUFFER_CHAR ||
+             base[size-1] != YY_END_OF_BUFFER_CHAR )
+                /* They forgot to leave room for the EOB's. */
+                return 0;
+
+        b = (YY_BUFFER_STATE) yyalloc(sizeof( struct yy_buffer_state )  );
+        if ( ! b )
+                YY_FATAL_ERROR( "out of dynamic memory in yy_scan_buffer()" );
+
+        b->yy_buf_size = size - 2;      /* "- 2" to take care of EOB's */
+        b->yy_buf_pos = b->yy_ch_buf = base;
+        b->yy_is_our_buffer = 0;
+        b->yy_input_file = 0;
+        b->yy_n_chars = b->yy_buf_size;
+        b->yy_is_interactive = 0;
+        b->yy_at_bol = 1;
+        b->yy_fill_buffer = 0;
+        b->yy_buffer_status = YY_BUFFER_NEW;
+
+        yy_switch_to_buffer(b  );
+
+        return b;
+}
+/* %endif */
+
+/* %if-c-only */
+/** Setup the input buffer state to scan a string. The next call to yylex() will
+ * scan from a @e copy of @a str.
+ * @param yystr a NUL-terminated string to scan
+ * 
+ * @return the newly allocated buffer state object.
+ * @note If you want to scan bytes that may contain NUL values, then use
+ *       yy_scan_bytes() instead.
+ */
+YY_BUFFER_STATE yy_scan_string (yyconst char * yystr )
+{
+    
+        return yy_scan_bytes(yystr,strlen(yystr) );
+}
+/* %endif */
+
+/* %if-c-only */
+/** Setup the input buffer state to scan the given bytes. The next call to yylex() will
+ * scan from a @e copy of @a bytes.
+ * @param bytes the byte buffer to scan
+ * @param len the number of bytes in the buffer pointed to by @a bytes.
+ * 
+ * @return the newly allocated buffer state object.
+ */
+YY_BUFFER_STATE yy_scan_bytes  (yyconst char * yybytes, int  _yybytes_len )
+{
+        YY_BUFFER_STATE b;
+        char *buf;
+        yy_size_t n;
+        int i;
+    
+        /* Get memory for full buffer, including space for trailing EOB's. */
+        n = _yybytes_len + 2;
+        buf = (char *) yyalloc(n  );
+        if ( ! buf )
+                YY_FATAL_ERROR( "out of dynamic memory in yy_scan_bytes()" );
+
+        for ( i = 0; i < _yybytes_len; ++i )
+                buf[i] = yybytes[i];
+
+        buf[_yybytes_len] = buf[_yybytes_len+1] = YY_END_OF_BUFFER_CHAR;
+
+        b = yy_scan_buffer(buf,n );
+        if ( ! b )
+                YY_FATAL_ERROR( "bad buffer in yy_scan_bytes()" );
+
+        /* It's okay to grow etc. this buffer, and we should throw it
+         * away when we're done.
+         */
+        b->yy_is_our_buffer = 1;
+
+        return b;
+}
+/* %endif */
+
+#ifndef YY_EXIT_FAILURE
+#define YY_EXIT_FAILURE 2
+#endif
+
+/* %if-c-only */
+static void yy_fatal_error (yyconst char* msg )
+{
+        (void) fprintf( stderr, "%s\n", msg );
+        exit( YY_EXIT_FAILURE );
+}
+/* %endif */
+/* %if-c++-only */
+/* %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 */
+
+/** Get the current line number.
+ * 
+ */
+int yyget_lineno  (void)
+{
+        
+    return yylineno;
+}
+
+/** Get the input stream.
+ * 
+ */
+FILE *yyget_in  (void)
+{
+        return yyin;
+}
+
+/** Get the output stream.
+ * 
+ */
+FILE *yyget_out  (void)
+{
+        return yyout;
+}
+
+/** Get the length of the current token.
+ * 
+ */
+int yyget_leng  (void)
+{
+        return yyleng;
+}
+
+/** Get the current token.
+ * 
+ */
+
+char *yyget_text  (void)
+{
+        return yytext;
+}
+
+/* %if-reentrant */
+/* %endif */
+
+/** Set the current line number.
+ * @param line_number
+ * 
+ */
+void yyset_lineno (int  line_number )
+{
+    
+    yylineno = line_number;
+}
+
+/** Set the input stream. This does not discard the current
+ * input buffer.
+ * @param in_str A readable stream.
+ * 
+ * @see yy_switch_to_buffer
+ */
+void yyset_in (FILE *  in_str )
+{
+        yyin = in_str ;
+}
+
+void yyset_out (FILE *  out_str )
+{
+        yyout = out_str ;
+}
+
+int yyget_debug  (void)
+{
+        return yy_flex_debug;
+}
+
+void yyset_debug (int  bdebug )
+{
+        yy_flex_debug = bdebug ;
+}
+
+/* %endif */
+
+/* %if-reentrant */
+/* %if-bison-bridge */
+/* %endif */
+/* %endif if-c-only */
+
+/* %if-c-only */
+static int yy_init_globals (void)
+{
+        /* Initialization is the same as for the non-reentrant scanner.
+     * This function is called from yylex_destroy(), so don't allocate here.
+     */
+
+    (yy_buffer_stack) = 0;
+    (yy_buffer_stack_top) = 0;
+    (yy_buffer_stack_max) = 0;
+    (yy_c_buf_p) = (char *) 0;
+    (yy_init) = 0;
+    (yy_start) = 0;
+
+/* Defined in main.c */
+#ifdef YY_STDINIT
+    yyin = stdin;
+    yyout = stdout;
+#else
+    yyin = (FILE *) 0;
+    yyout = (FILE *) 0;
+#endif
+
+    /* For future reference: Set errno on error, since we are called by
+     * yylex_init()
+     */
+    return 0;
+}
+/* %endif */
+
+/* %if-c-only SNIP! this currently causes conflicts with the c++ scanner */
+/* yylex_destroy is for both reentrant and non-reentrant scanners. */
+int yylex_destroy  (void)
+{
+    
+    /* Pop the buffer stack, destroying each element. */
+        while(YY_CURRENT_BUFFER){
+                yy_delete_buffer(YY_CURRENT_BUFFER  );
+                YY_CURRENT_BUFFER_LVALUE = NULL;
+                yypop_buffer_state();
+        }
+
+        /* Destroy the stack itself. */
+        yyfree((yy_buffer_stack) );
+        (yy_buffer_stack) = NULL;
+
+    /* Reset the globals. This is important in a non-reentrant scanner so the next time
+     * yylex() is called, initialization will occur. */
+    yy_init_globals( );
+
+/* %if-reentrant */
+/* %endif */
+    return 0;
+}
+/* %endif */
+
+/*
+ * Internal utility routines.
+ */
+
+#ifndef yytext_ptr
+static void yy_flex_strncpy (char* s1, yyconst char * s2, int n )
+{
+        register 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 )
+{
+        register 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 54 "calc++-scanner.ll"
+
+
+
+void
+calcxx_driver::scan_begin ()
+{
+  yy_flex_debug = trace_scanning;
+  if (file == "-")
+    yyin = stdin;
+  else if (!(yyin = fopen (file.c_str (), "r")))
+    {
+      error (std::string ("cannot open ") + file);
+      exit (1);
+    }
+}
+
+void
+calcxx_driver::scan_end ()
+{
+  fclose (yyin);
+}
+