[CI] Configured environment for first coursework

22 files changed, 2518 insertions, 2 deletions

diff --git a/.gitignore b/.gitignore
index 52aca6e..8b9aa79 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,6 +14,8 @@ Year 2/Implementation of Programming Languages/*.ghc
 Year 2/Implementation of Programming Languages/**/*.ghc
 Year 3/Compilers, Introduction/coolc-spim/class-code/
 Year 3/Compilers, Introduction/coolc-spim/**/*.s
+Year 3/Compilers, Introduction/coolc-spim/**/*.o
+Year 3/Compilers, Introduction/coolc-spim/**/lexer
 
 # ---
 # C++
diff --git a/Year 3/Compilers, Introduction/coolc-spim/docker-container/Dockerfile b/Year 3/Compilers, Introduction/coolc-spim/docker-container/Dockerfile
index 86a00d9..5cdd0c7 100644
--- a/Year 3/Compilers, Introduction/coolc-spim/docker-container/Dockerfile
+++ b/Year 3/Compilers, Introduction/coolc-spim/docker-container/Dockerfile
@@ -4,7 +4,7 @@ RUN apt-get update && \
     apt-get upgrade -y && \
     apt-get clean
 
-RUN apt install spim build-essential -y
+RUN apt install spim build-essential csh flex -y
 
 RUN mkdir /usr/class
 RUN mkdir /usr/code
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/1.cl b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/1.cl
new file mode 100644
index 0000000..4ee157d
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/1.cl
@@ -0,0 +1 @@
+class Main { main(): Int { 1 }; };
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/Makefile b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/Makefile
new file mode 100644
index 0000000..494bd75
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/Makefile
@@ -0,0 +1,82 @@
+
+ASSN = 2
+CLASS= cs143
+CLASSDIR= /usr/class/cs143/cool
+LIB= /lib/x86_64-linux-gnu/libfl.a
+
+SRC= cool.flex test.cl README 
+CSRC= lextest.cc utilities.cc stringtab.cc handle_flags.cc
+TSRC= mycoolc
+HSRC= 
+CGEN= cool-lex.cc
+HGEN=
+LIBS= parser semant cgen
+CFIL= ${CSRC} ${CGEN}
+LSRC= Makefile
+OBJS= ${CFIL:.cc=.o}
+OUTPUT= test.output
+
+CPPINCLUDE= -I. -I${CLASSDIR}/include/PA${ASSN} -I${CLASSDIR}/src/PA${ASSN}
+
+
+FFLAGS= -d -ocool-lex.cc
+
+CC=g++
+CFLAGS= -g -Wall -Wno-unused -Wno-write-strings ${CPPINCLUDE}
+FLEX=flex ${FFLAGS}
+DEPEND = ${CC} -MM ${CPPINCLUDE}
+
+
+source : ${SRC} ${TSRC} ${LSRC} ${LIBS} lsource
+
+lsource: ${LSRC}
+
+${OUTPUT}:	lexer test.cl
+	@rm -f test.output
+	-./lexer test.cl >test.output 2>&1 
+
+lexer: ${OBJS}
+	${CC} ${CFLAGS} ${OBJS} ${LIB} -o lexer
+
+.cc.o:
+	${CC} ${CFLAGS} -c $<
+
+cool-lex.cc: cool.flex 
+	${FLEX} cool.flex
+
+dotest:	lexer test.cl
+	./lexer test.cl
+
+${LIBS}:
+	${CLASSDIR}/etc/link-object ${ASSN} $@
+
+# These dependencies allow you to get the starting files for
+# the assignment.  They will not overwrite a file you already have.
+
+${SRC} :								
+	${CLASSDIR}/etc/copy-skel ${ASSN} ${SRC}
+
+${LSRC} :
+	${CLASSDIR}/etc/link-shared ${ASSN} ${LSRC}
+
+${TSRC} ${CSRC}:
+	-ln -s ${CLASSDIR}/src/PA${ASSN}/$@ $@
+
+${HSRC}:
+	-ln -s ${CLASSDIR}/include/PA${ASSN}/$@ $@
+
+submit-clean: ${OUTPUT}
+	-rm -f *.s core ${OBJS} lexer cool-lex.cc *~ parser cgen semant
+
+clean :
+	-rm -f ${OUTPUT} *.s core ${OBJS} lexer cool-lex.cc *~ parser cgen semant
+
+clean-compile:
+	@-rm -f core ${OBJS} cool-lex.cc ${LSRC}
+
+%.d: %.cc ${SRC} ${LSRC}
+	${SHELL} -ec '${DEPEND} $< | sed '\''s/\($*\.o\)[ :]*/\1 $@ : /g'\'' > $@'
+
+-include ${CFIL:.cc=.d}
+
+
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/README b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/README
new file mode 100644
index 0000000..a2858be
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/README
@@ -0,0 +1,92 @@
+README file for Programming Assignment 2 (C++ edition)
+=====================================================
+
+Your directory should now contain the following files:
+
+ Makefile        -> [course dir]/src/PA2/Makefile
+ README
+ cool.flex
+ test.cl
+ lextest.cc      -> [course dir]/src/PA2/lextest.cc
+ mycoolc         -> [course dir]/src/PA2/mycoolc
+ stringtab.cc    -> [course dir]/src/PA2/stringtab.cc
+ utilities.cc    -> [course dir]/src/PA2/utilities.cc
+ handle_flags.cc -> [course dir]/src/PA2/handle_flags.cc
+ *.d             dependency files
+ *.*             other generated files
+
+The include (.h) files for this assignment can be found in 
+[course dir]/include/PA2
+
+	The Makefile contains targets for compiling and running your
+	program. DO NOT MODIFY.
+
+	cool.flex is a skeleton file for the specification of the
+	lexical analyzer. You should complete it with your regular
+	expressions, patterns and actions. 
+
+	test.cl is a COOL program that you can test the lexical
+	analyzer on. It contains some errors, so it won't compile with
+	coolc. However, test.cl does not exercise all lexical
+	constructs of COOL and part of your assignment is to rewrite
+	test.cl with a complete set of tests for your lexical analyzer.
+
+	cool-parse.h contains definitions that are used by almost all parts
+	of the compiler. DO NOT MODIFY.
+
+	stringtab.{cc|h} and stringtab_functions.h contains functions
+        to manipulate the string tables.  DO NOT MODIFY.
+
+	utilities.{cc|h} contains functions used by the main() part of
+	the lextest program. You may want to use the strdup() function
+	defined in here. Remember that you should not print anything
+	from inside cool.flex! DO NOT MODIFY.
+
+	lextest.cc contains the main function which will call your
+	lexer and print out the tokens that it returns.  DO NOT MODIFY.
+
+	mycoolc is a shell script that glues together the phases of the
+	compiler using Unix pipes instead of statically linking code.  
+	While inefficient, this architecture makes it easy to mix and match
+	the components you write with those of the course compiler.
+	DO NOT MODIFY.	
+
+        cool-lexer.cc is the scanner generated by flex from cool.flex.
+        DO NOT MODIFY IT, as your changes will be overritten the next
+        time you run flex.
+
+ 	The *.d files are automatically generated Makefiles that capture
+ 	dependencies between source and header files in this directory.
+ 	These files are updated automatically by Makefile; see the make
+ 	documentation for a detailed explanation.
+
+Instructions
+------------
+
+	To compile your lextest program type:
+
+	% make lexer
+
+	Run your lexer by putting your test input in a file 'foo.cl' and
+	run the lextest program:
+
+	% ./lexer foo.cl
+
+	To run your lexer on the file test.cl type:
+
+	% make dotest
+
+	If you think your lexical analyzer is correct and behaves like
+	the one we wrote, you can actually try 'mycoolc' and see whether
+	it runs and produces correct code for any examples.
+	If your lexical analyzer behaves in an
+	unexpected manner, you may get errors anywhere, i.e. during
+	parsing, during semantic analysis, during code generation or
+	only when you run the produced code on spim. So beware.
+
+
+        Instructions for turning in the assignment will be posted on the
+        course web page.
+
+        GOOD LUCK!
+
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cgen b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cgen
new file mode 120000
index 0000000..6b0b610
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cgen
@@ -0,0 +1 @@
+/usr/class/cs143/cool/etc/../lib/.i686/PA2/cgen
\ No newline at end of file
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool-lex.cc b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool-lex.cc
new file mode 100644
index 0000000..4f943bf
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool-lex.cc
@@ -0,0 +1,2116 @@
+#line 2 "cool-lex.cc"
+
+#line 4 "cool-lex.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 4
+#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;
+
+/* 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
+
+#ifndef SIZE_MAX
+#define SIZE_MAX               (~(size_t)0)
+#endif
+
+#endif /* ! C99 */
+
+#endif /* ! FLEXINT_H */
+
+/* %endif */
+
+/* begin standard C++ headers. */
+/* %if-c++-only */
+/* %endif */
+
+/* TODO: this is always defined, so inline it */
+#define yyconst const
+
+#if defined(__GNUC__) && __GNUC__ >= 3
+#define yynoreturn __attribute__((__noreturn__))
+#else
+#define yynoreturn
+#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
+ *   integer in range [0..255] for use as an array index.
+ */
+#define YY_SC_TO_UI(c) ((YY_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 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)
+    #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 */
+	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.
+	 */
+	int 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 = NULL; /**< 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 = NULL;
+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 ( const char *yy_str  );
+YY_BUFFER_STATE yy_scan_bytes ( const 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 FLEX_DEBUG
+typedef flex_uint8_t YY_CHAR;
+
+FILE *yyin = NULL, *yyout = NULL;
+
+typedef int yy_state_type;
+
+extern int yylineno;
+int yylineno = 1;
+
+extern char *yytext;
+#ifdef yytext_ptr
+#undef yytext_ptr
+#endif
+#define yytext_ptr yytext
+
+/* %% [1.5] DFA */
+
+/* %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 yynoreturn yy_fatal_error ( const 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 = (int) (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 2
+#define YY_END_OF_BUFFER 3
+/* 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 const flex_int16_t yy_accept[8] =
+    {   0,
+        0,    0,    3,    2,    2,    1,    0
+    } ;
+
+static const YY_CHAR yy_ec[256] =
+    {   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,    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,
+        2,    3,    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,    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 const YY_CHAR yy_meta[4] =
+    {   0,
+        1,    1,    2
+    } ;
+
+static const flex_int16_t yy_base[10] =
+    {   0,
+        4,    3,    4,    7,    0,    7,    7,    0,    1
+    } ;
+
+static const flex_int16_t yy_def[10] =
+    {   0,
+        8,    8,    7,    7,    9,    7,    0,    7,    7
+    } ;
+
+static const flex_int16_t yy_nxt[11] =
+    {   0,
+        4,    4,    6,    7,    5,    5,    3,    7,    7,    7
+    } ;
+
+static const flex_int16_t yy_chk[11] =
+    {   0,
+        8,    8,    9,    3,    2,    1,    7,    7,    7,    7
+    } ;
+
+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 const flex_int16_t yy_rule_linenum[2] =
+    {   0,
+       65
+    } ;
+
+/* 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 "cool.flex"
+/*
+ *  The scanner definition for COOL.
+ */
+/*
+ *  Stuff enclosed in %{ %} in the first section is copied verbatim to the
+ *  output, so headers and global definitions are placed here to be visible
+ * to the code in the file.  Don't remove anything that was here initially
+ */
+#line 11 "cool.flex"
+#include <cool-parse.h>
+#include <stringtab.h>
+#include <utilities.h>
+
+/* The compiler assumes these identifiers. */
+#define yylval cool_yylval
+#define yylex  cool_yylex
+
+/* Max size of string constants */
+#define MAX_STR_CONST 1025
+#define YY_NO_UNPUT   /* keep g++ happy */
+
+extern FILE *fin; /* we read from this file */
+
+/* define YY_INPUT so we read from the FILE fin:
+ * This change makes it possible to use this scanner in
+ * the Cool compiler.
+ */
+#undef YY_INPUT
+#define YY_INPUT(buf,result,max_size) \
+	if ( (result = fread( (char*)buf, sizeof(char), max_size, fin)) < 0) \
+		YY_FATAL_ERROR( "read() in flex scanner failed");
+
+char string_buf[MAX_STR_CONST]; /* to assemble string constants */
+char *string_buf_ptr;
+
+extern int curr_lineno;
+extern int verbose_flag;
+
+extern YYSTYPE cool_yylval;
+
+/*
+ *  Add Your own definitions here
+ */
+
+#line 570 "cool-lex.cc"
+/*
+ * Define names for regular expressions here.
+ */
+#line 574 "cool-lex.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 */
+#ifndef YY_NO_UNPUT
+    
+    static void yyunput ( int c, char *buf_ptr  );
+    
+#endif
+/* %ok-for-header */
+
+/* %endif */
+
+#ifndef yytext_ptr
+static void yy_flex_strncpy ( char *, const char *, int );
+#endif
+
+#ifdef YY_NEED_STRLEN
+static int yy_flex_strlen ( const 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
+#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 */
+/* This used to be an fputs(), but since the string might contain NUL's,
+ * we now use fwrite().
+ */
+#define ECHO do { if (fwrite( yytext, (size_t) yyleng, 1, yyout )) {} } while (0)
+/* %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 = (int) fread(buf, 1, (yy_size_t) 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 /*LINTED*/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
+{
+	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 */
+			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(  );
+		}
+
+	{
+/* %% [7.0] user's declarations go here */
+#line 54 "cool.flex"
+
+
+#line 57 "cool.flex"
+ /*
+  *  Nested comments
+  */
+
+
+ /*
+  *  The multiple-character operators.
+  */
+#line 866 "cool-lex.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 >= 8 )
+					yy_c = yy_meta[yy_c];
+				}
+			yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c];
+			++yy_cp;
+			}
+		while ( yy_base[yy_current_state] != 7 );
+
+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 )
+				fprintf( stderr, "--scanner backing up\n" );
+			else if ( yy_act < 2 )
+				fprintf( stderr, "--accepting rule at line %ld (\"%s\")\n",
+				         (long)yy_rule_linenum[yy_act], yytext );
+			else if ( yy_act == 2 )
+				fprintf( stderr, "--accepting default rule (\"%s\")\n",
+				         yytext );
+			else if ( yy_act == 3 )
+				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 65 "cool.flex"
+{ return (DARROW); }
+	YY_BREAK
+/*
+  * Keywords are case-insensitive except for the values true and false,
+  * which must begin with a lower-case letter.
+  */
+/*
+  *  String constants (C syntax)
+  *  Escape sequence \c is accepted for all characters c. Except for 
+  *  \n \t \b \f, the result is c.
+  *
+  */
+case 2:
+YY_RULE_SETUP
+#line 81 "cool.flex"
+ECHO;
+	YY_BREAK
+#line 966 "cool-lex.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;
+/* %if-c-only */
+			YY_CURRENT_BUFFER_LVALUE->yy_input_file = yyin;
+/* %endif */
+/* %if-c++-only */
+/* %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 */
+/* %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 */
+{
+    	char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf;
+	char *source = (yytext_ptr);
+	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_LVALUE;
+
+			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,
+							 (yy_size_t) (b->yy_buf_size + 2)  );
+				}
+			else
+				/* Can't grow it, we don't own it. */
+				b->yy_ch_buf = NULL;
+
+			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_n_chars) + number_to_move) > YY_CURRENT_BUFFER_LVALUE->yy_buf_size) {
+		/* Extend the array by 50%, plus the number we really need. */
+		int 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, (yy_size_t) new_size  );
+		if ( ! YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
+			YY_FATAL_ERROR( "out of dynamic memory in yy_get_next_buffer()" );
+		/* "- 2" to take care of EOB's */
+		YY_CURRENT_BUFFER_LVALUE->yy_buf_size = (int) (new_size - 2);
+	}
+
+	(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 */
+{
+	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 >= 8 )
+				yy_c = yy_meta[yy_c];
+			}
+		yy_current_state = yy_nxt[yy_base[yy_current_state] + 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 */
+{
+	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 >= 8 )
+			yy_c = yy_meta[yy_c];
+		}
+	yy_current_state = yy_nxt[yy_base[yy_current_state] + yy_c];
+	yy_is_jam = (yy_current_state == 7);
+
+		return yy_is_jam ? 0 : yy_current_state;
+}
+
+#ifndef YY_NO_UNPUT
+/* %if-c-only */
+
+    static void yyunput (int c, char * yy_bp )
+/* %endif */
+/* %if-c++-only */
+/* %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. */
+		int 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) = (int) 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 */
+#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 = (int) ((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 0;
+
+					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(  );
+}
+
+/* %if-c++-only */
+/* %endif */
+
+/** 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;
+/* %if-c-only */
+	yyin = YY_CURRENT_BUFFER_LVALUE->yy_input_file;
+/* %endif */
+/* %if-c++-only */
+/* %endif */
+	(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( (yy_size_t) (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 */
+/* %endif */
+
+/** 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  );
+}
+
+/* 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 );
+
+/* %if-c-only */
+	b->yy_input_file = file;
+/* %endif */
+/* %if-c++-only */
+/* %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 */
+
+        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 */
+{
+	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 */
+/** 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 NULL;
+
+	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 = (int) (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 = NULL;
+	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 (const char * yystr )
+{
+    
+	return yy_scan_bytes( yystr, (int) 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 yybytes the byte buffer to scan
+ * @param _yybytes_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  (const 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 = (yy_size_t) (_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 yynoreturn yy_fatal_error (const char* msg )
+{
+			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 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) = NULL;
+    (yy_buffer_stack_top) = 0;
+    (yy_buffer_stack_max) = 0;
+    (yy_c_buf_p) = NULL;
+    (yy_init) = 0;
+    (yy_start) = 0;
+
+/* Defined in main.c */
+#ifdef YY_STDINIT
+    yyin = stdin;
+    yyout = stdout;
+#else
+    yyin = NULL;
+    yyout = NULL;
+#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, const 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 (const char * s )
+{
+	int n;
+	for ( n = 0; s[n]; ++n )
+		;
+
+	return n;
+}
+#endif
+
+void *yyalloc (yy_size_t  size )
+{
+			return 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 realloc(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 81 "cool.flex"
+
+
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool-lex.d b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool-lex.d
new file mode 100644
index 0000000..2994832
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool-lex.d
@@ -0,0 +1,8 @@
+cool-lex.o cool-lex.d : cool-lex.cc /usr/class/cs143/cool/include/PA2/cool-parse.h \
+ /usr/class/cs143/cool/include/PA2/copyright.h \
+ /usr/class/cs143/cool/include/PA2/cool-io.h \
+ /usr/class/cs143/cool/include/PA2/tree.h \
+ /usr/class/cs143/cool/include/PA2/stringtab.h \
+ /usr/class/cs143/cool/include/PA2/list.h \
+ /usr/class/cs143/cool/include/PA2/stringtab.h \
+ /usr/class/cs143/cool/include/PA2/utilities.h
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool.flex b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool.flex
new file mode 100644
index 0000000..acb7d8a
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool.flex
@@ -0,0 +1,80 @@
+/*
+ *  The scanner definition for COOL.
+ */
+
+/*
+ *  Stuff enclosed in %{ %} in the first section is copied verbatim to the
+ *  output, so headers and global definitions are placed here to be visible
+ * to the code in the file.  Don't remove anything that was here initially
+ */
+%{
+#include <cool-parse.h>
+#include <stringtab.h>
+#include <utilities.h>
+
+/* The compiler assumes these identifiers. */
+#define yylval cool_yylval
+#define yylex  cool_yylex
+
+/* Max size of string constants */
+#define MAX_STR_CONST 1025
+#define YY_NO_UNPUT   /* keep g++ happy */
+
+extern FILE *fin; /* we read from this file */
+
+/* define YY_INPUT so we read from the FILE fin:
+ * This change makes it possible to use this scanner in
+ * the Cool compiler.
+ */
+#undef YY_INPUT
+#define YY_INPUT(buf,result,max_size) \
+	if ( (result = fread( (char*)buf, sizeof(char), max_size, fin)) < 0) \
+		YY_FATAL_ERROR( "read() in flex scanner failed");
+
+char string_buf[MAX_STR_CONST]; /* to assemble string constants */
+char *string_buf_ptr;
+
+extern int curr_lineno;
+extern int verbose_flag;
+
+extern YYSTYPE cool_yylval;
+
+/*
+ *  Add Your own definitions here
+ */
+
+%}
+
+/*
+ * Define names for regular expressions here.
+ */
+
+DARROW          =>
+
+%%
+
+ /*
+  *  Nested comments
+  */
+
+
+ /*
+  *  The multiple-character operators.
+  */
+{DARROW}		{ return (DARROW); }
+
+ /*
+  * Keywords are case-insensitive except for the values true and false,
+  * which must begin with a lower-case letter.
+  */
+
+
+ /*
+  *  String constants (C syntax)
+  *  Escape sequence \c is accepted for all characters c. Except for 
+  *  \n \t \b \f, the result is c.
+  *
+  */
+
+
+%%
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/handle_flags.cc b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/handle_flags.cc
new file mode 120000
index 0000000..848f087
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/handle_flags.cc
@@ -0,0 +1 @@
+/usr/class/cs143/cool/src/PA2/handle_flags.cc
\ No newline at end of file
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/handle_flags.d b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/handle_flags.d
new file mode 100644
index 0000000..a6a5b30
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/handle_flags.d
@@ -0,0 +1,5 @@
+handle_flags.o handle_flags.d : handle_flags.cc \
+ /usr/class/cs143/cool/include/PA2/copyright.h \
+ /usr/class/cs143/cool/include/PA2/cool-io.h \
+ /usr/class/cs143/cool/include/PA2/copyright.h \
+ /usr/class/cs143/cool/include/PA2/cgen_gc.h
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/lextest.cc b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/lextest.cc
new file mode 120000
index 0000000..a4590b1
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/lextest.cc
@@ -0,0 +1 @@
+/usr/class/cs143/cool/src/PA2/lextest.cc
\ No newline at end of file
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/lextest.d b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/lextest.d
new file mode 100644
index 0000000..156a89a
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/lextest.d
@@ -0,0 +1,8 @@
+lextest.o lextest.d : lextest.cc /usr/class/cs143/cool/include/PA2/copyright.h \
+ /usr/class/cs143/cool/include/PA2/cool-parse.h \
+ /usr/class/cs143/cool/include/PA2/copyright.h \
+ /usr/class/cs143/cool/include/PA2/cool-io.h \
+ /usr/class/cs143/cool/include/PA2/tree.h \
+ /usr/class/cs143/cool/include/PA2/stringtab.h \
+ /usr/class/cs143/cool/include/PA2/list.h \
+ /usr/class/cs143/cool/include/PA2/utilities.h
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/mycoolc b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/mycoolc
new file mode 120000
index 0000000..ab82720
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/mycoolc
@@ -0,0 +1 @@
+/usr/class/cs143/cool/src/PA2/mycoolc
\ No newline at end of file
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/parser b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/parser
new file mode 120000
index 0000000..3dc4631
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/parser
@@ -0,0 +1 @@
+/usr/class/cs143/cool/etc/../lib/.i686/PA2/parser
\ No newline at end of file
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/semant b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/semant
new file mode 120000
index 0000000..4ce1c85
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/semant
@@ -0,0 +1 @@
+/usr/class/cs143/cool/etc/../lib/.i686/PA2/semant
\ No newline at end of file
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/stringtab.cc b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/stringtab.cc
new file mode 120000
index 0000000..ea56756
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/stringtab.cc
@@ -0,0 +1 @@
+/usr/class/cs143/cool/src/PA2/stringtab.cc
\ No newline at end of file
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/stringtab.d b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/stringtab.d
new file mode 100644
index 0000000..97864fb
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/stringtab.d
@@ -0,0 +1,7 @@
+stringtab.o stringtab.d : stringtab.cc /usr/class/cs143/cool/include/PA2/copyright.h \
+ /usr/class/cs143/cool/include/PA2/stringtab_functions.h \
+ /usr/class/cs143/cool/include/PA2/copyright.h \
+ /usr/class/cs143/cool/include/PA2/cool-io.h \
+ /usr/class/cs143/cool/include/PA2/stringtab.h \
+ /usr/class/cs143/cool/include/PA2/list.h \
+ /usr/class/cs143/cool/include/PA2/stringtab.h
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/test.cl b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/test.cl
new file mode 100644
index 0000000..04c8101
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/test.cl
@@ -0,0 +1,97 @@
+(* models one-dimensional cellular automaton on a circle of finite radius
+   arrays are faked as Strings,
+   X's respresent live cells, dots represent dead cells,
+   no error checking is done *)
+class CellularAutomaton inherits IO {
+    population_map : String;
+   
+    init(map : String) : SELF_TYPE {
+        {
+            population_map <- map;
+            self;
+        }
+    };
+   
+    print() : SELF_TYPE {
+        {
+            out_string(population_map.concat("\n"));
+            self;
+        }
+    };
+   
+    num_cells() : Int {
+        population_map.length()
+    };
+   
+    cell(position : Int) : String {
+        population_map.substr(position, 1)
+    };
+   
+    cell_left_neighbor(position : Int) : String {
+        if position = 0 then
+            cell(num_cells() - 1)
+        else
+            cell(position - 1)
+        fi
+    };
+   
+    cell_right_neighbor(position : Int) : String {
+        if position = num_cells() - 1 then
+            cell(0)
+        else
+            cell(position + 1)
+        fi
+    };
+   
+    (* a cell will live if exactly 1 of itself and it's immediate
+       neighbors are alive *)
+    cell_at_next_evolution(position : Int) : String {
+        if (if cell(position) = "X" then 1 else 0 fi
+            + if cell_left_neighbor(position) = "X" then 1 else 0 fi
+            + if cell_right_neighbor(position) = "X" then 1 else 0 fi
+            = 1)
+        then
+            "X"
+        else
+            '.'
+        fi
+    };
+   
+    evolve() : SELF_TYPE {
+        (let position : Int in
+        (let num : Int <- num_cells[] in
+        (let temp : String in
+            {
+                while position < num loop
+                    {
+                        temp <- temp.concat(cell_at_next_evolution(position));
+                        position <- position + 1;
+                    }
+                pool;
+                population_map <- temp;
+                self;
+            }
+        ) ) )
+    };
+};
+
+class Main {
+    cells : CellularAutomaton;
+   
+    main() : SELF_TYPE {
+        {
+            cells <- (new CellularAutomaton).init("         X         ");
+            cells.print();
+            (let countdown : Int <- 20 in
+                while countdown > 0 loop
+                    {
+                        cells.evolve();
+                        cells.print();
+                        countdown <- countdown - 1;
+                    
+                pool
+            );  (* end let countdown
+            self;
+        }
+    };
+};
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/utilities.cc b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/utilities.cc
new file mode 120000
index 0000000..64ec098
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/utilities.cc
@@ -0,0 +1 @@
+/usr/class/cs143/cool/src/PA2/utilities.cc
\ No newline at end of file
diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/utilities.d b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/utilities.d
new file mode 100644
index 0000000..cc2f090
--- /dev/null
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/utilities.d
@@ -0,0 +1,10 @@
+utilities.o utilities.d : utilities.cc /usr/class/cs143/cool/include/PA2/copyright.h \
+ /usr/class/cs143/cool/include/PA2/cool-io.h \
+ /usr/class/cs143/cool/include/PA2/copyright.h \
+ /usr/class/cs143/cool/include/PA2/cool-parse.h \
+ /usr/class/cs143/cool/include/PA2/cool-io.h \
+ /usr/class/cs143/cool/include/PA2/tree.h \
+ /usr/class/cs143/cool/include/PA2/stringtab.h \
+ /usr/class/cs143/cool/include/PA2/list.h \
+ /usr/class/cs143/cool/include/PA2/stringtab.h \
+ /usr/class/cs143/cool/include/PA2/utilities.h
diff --git a/Year 3/Compilers, Introduction/coolc-spim/run.sh b/Year 3/Compilers, Introduction/coolc-spim/run.sh
index d0eff12..d84f0f4 100755
--- a/Year 3/Compilers, Introduction/coolc-spim/run.sh
+++ b/Year 3/Compilers, Introduction/coolc-spim/run.sh
@@ -5,5 +5,5 @@ printf "\033[1;32mMake sure dockerd is running before running this script.\n\033
 pushd docker-container
 docker build . -t coolc-spim
 popd
-docker run --name coolc-spim -v $(pwd)/class-code:/usr/class -v $(pwd)/my-code:/usr/code -d coolc-spim tail -f /dev/null
+docker run --name coolc-spim -v "$(pwd)/class-code:/usr/class" -v "$(pwd)/my-code:/usr/code" -d coolc-spim tail -f /dev/null
 docker exec -it coolc-spim bash