diff --git a/CMakeLists.txt b/CMakeLists.txt
index 55d2127..b5f3a75 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -89,13 +89,24 @@ RAGEL_TARGET(value value.rl value.cpp COMPILE_FLAGS "-p -G2")
 
 
 # need to copy all OUTPUT file to the build dir
-add_custom_command(
-	OUTPUT phase3.cpp phase3.h phase3.out
-	COMMAND lemon++ phase3.lemon
-	COMMAND mv -f phase3.cpp phase3.h phase3.out ${CMAKE_CURRENT_BINARY_DIR}/
-	MAIN_DEPENDENCY phase3.lemon 
-	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-)
+# add_custom_command(
+# 	OUTPUT phase3.cpp phase3.h phase3.out
+# 	COMMAND lemon++ phase3.lemon
+# 	COMMAND mv -f phase3.cpp phase3.h phase3.out ${CMAKE_CURRENT_BINARY_DIR}/
+# 	MAIN_DEPENDENCY phase3.lemon 
+# 	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+# )
+
+find_program(LEMON_PLUSPLUS NAMES lemon++)
+if (LEMON_PLUSPLUS)
+	add_custom_command(
+		OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/phase3.cpp ${CMAKE_CURRENT_SOURCE_DIR}/phase3.h
+		#COMMAND cp -f "${CMAKE_CURRENT_SOURCE_DIR}/parser.lemon" "parser.lemon"
+		COMMAND lemon++ phase3.lemon
+		MAIN_DEPENDENCY phase3.lemon
+		WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+	)
+endif()
 
 
 add_executable(mpw-shell mpw-shell.cpp  mpw-shell-token.cpp mpw-shell-expand.cpp 
diff --git a/lemon_base.h b/lemon_base.h
new file mode 100644
index 0000000..caad319
--- /dev/null
+++ b/lemon_base.h
@@ -0,0 +1,34 @@
+#ifndef __lemon_base_h__
+#define __lemon_base_h__
+#include <cstdio>
+
+template<class TokenType>
+class lemon_base {
+public:
+	typedef TokenType token_type;
+	
+	virtual ~lemon_base() = default;
+
+	//virtual typename std::enable_if<std::is_move_constructible<TokenType>::value, void>::type 
+	virtual void parse(int yymajor, TokenType &&yyminor) = 0;
+
+	virtual void trace(FILE *, const char *) {}
+
+	virtual bool will_accept() const = 0;
+	virtual void reset() {}
+
+protected:
+	virtual void parse_accept() {}
+	virtual void parse_failure() {}
+	virtual void stack_overflow() {}
+	virtual void syntax_error(int yymajor, TokenType &yyminor) {}
+	lemon_base() {}
+
+private:
+	lemon_base(const lemon_base &) = delete;
+	lemon_base(lemon_base &&) = delete;
+	lemon_base &operator=(const lemon_base &) = delete;
+	lemon_base &operator=(lemon_base &&) = delete;
+};
+
+#endif
\ No newline at end of file
diff --git a/phase3.cpp b/phase3.cpp
new file mode 100644
index 0000000..12cc214
--- /dev/null
+++ b/phase3.cpp
@@ -0,0 +1,1862 @@
+/*
+
+January, 2016.  Sample class-based version.
+#define LEMON_SUPER as the name of a class which overrides lemon_base<TokenType>.  
+The parser will be implemented in terms of that.
+add a %code section to instantiate it.
+ */
+
+/*
+** 2000-05-29
+**
+** The author disclaims copyright to this source code.  In place of
+** a legal notice, here is a blessing:
+**
+**    May you do good and not evil.
+**    May you find forgiveness for yourself and forgive others.
+**    May you share freely, never taking more than you give.
+**
+*************************************************************************
+** Driver template for the LEMON parser generator.
+**
+** The "lemon" program processes an LALR(1) input grammar file, then uses
+** this template to construct a parser.  The "lemon" program inserts text
+** at each "%%" line.  Also, any "P-a-r-s-e" identifer prefix (without the
+** interstitial "-" characters) contained in this template is changed into
+** the value of the %name directive from the grammar.  Otherwise, the content
+** of this template is copied straight through into the generate parser
+** source file.
+**
+** The following is the concatenation of all %include directives from the
+** input grammar file:
+*/
+#include <cstdio>
+#include <cstring>
+#include <cassert>
+#include <type_traits>
+#include <new>
+#include <memory>
+#include <algorithm>
+
+namespace {
+
+  // use std::allocator etc?
+
+
+  // this is here so you can do something like Parse(void *, int, my_token &&) or (... const my_token &)
+  template<class T> struct yy_fix_type {
+    typedef typename std::remove_const<typename std::remove_reference<T>::type>::type type;
+  };
+
+  template<>
+  struct yy_fix_type<void> {
+    typedef struct {} type;
+  };
+
+  template<class T, class... Args>
+  typename yy_fix_type<T>::type &yy_constructor(void *vp, Args&&... args ) {
+    typedef typename yy_fix_type<T>::type TT;
+    TT *tmp = ::new(vp) TT(std::forward<Args>(args)...);
+    return *tmp;
+  }
+
+
+  template<class T>
+  typename yy_fix_type<T>::type &yy_cast(void *vp) {
+    typedef typename yy_fix_type<T>::type TT;
+    return *(TT *)vp;
+  }
+
+
+  template<class T>
+  void yy_destructor(void *vp) {
+    typedef typename yy_fix_type<T>::type TT;
+    ((TT *)vp)->~TT();
+  }
+
+
+  template<class T>
+  void yy_destructor(T &t) {
+    t.~T();
+  }
+
+
+
+  template<class T>
+  void yy_move(void *dest, void *src) {
+    typedef typename yy_fix_type<T>::type TT;
+
+    TT &tmp = yy_cast<TT>(src);
+    yy_constructor<TT>(dest, std::move(tmp));
+    yy_destructor(tmp);
+  }
+
+
+  // this is to destruct references in the event of an exception.
+  // only the LHS needs to be deleted -- other items remain on the 
+  // shift/reduce stack in a valid state 
+  // (as long as the destructor) doesn't throw!
+  template<class T>
+  struct yy_auto_deleter {
+
+    yy_auto_deleter(T &t) : ref(t), enaged(true)
+    {}
+    yy_auto_deleter(const yy_auto_deleter &) = delete;
+    yy_auto_deleter(yy_auto_deleter &&) = delete;
+    yy_auto_deleter &operator=(const yy_auto_deleter &) = delete;
+    yy_auto_deleter &operator=(yy_auto_deleter &&) = delete;
+
+    ~yy_auto_deleter() {
+      if (enaged) yy_destructor(ref);
+    }
+    void cancel() { enaged = false; }
+
+  private:
+    T& ref;
+    bool enaged=false;
+  };
+
+  template<class T>
+  class yy_storage {
+  private:
+    typedef typename yy_fix_type<T>::type TT;
+
+  public:
+    typedef typename std::conditional<
+      std::is_trivial<TT>::value,
+      TT,
+      typename std::aligned_storage<sizeof(TT),alignof(TT)>::type
+    >::type type;
+  };
+
+}
+
+/************ Begin %include sections from the grammar ************************/
+#line 7 "phase3.lemon"
+
+
+#include "phase3_parser.h"
+#include "command.h"
+#define LEMON_SUPER phase3
+#line 142 "phase3.cpp"
+/**************** End of %include directives **********************************/
+/* These constants specify the various numeric values for terminal symbols
+** in a format understandable to "makeheaders".  This section is blank unless
+** "lemon" is run with the "-m" command-line option.
+***************** Begin makeheaders token definitions *************************/
+/**************** End makeheaders token definitions ***************************/
+
+/* The next sections is a series of control #defines.
+** various aspects of the generated parser.
+**    YYCODETYPE         is the data type used to store the integer codes
+**                       that represent terminal and non-terminal symbols.
+**                       "unsigned char" is used if there are fewer than
+**                       256 symbols.  Larger types otherwise.
+**    YYNOCODE           is a number of type YYCODETYPE that is not used for
+**                       any terminal or nonterminal symbol.
+**    YYFALLBACK         If defined, this indicates that one or more tokens
+**                       (also known as: "terminal symbols") have fall-back
+**                       values which should be used if the original symbol
+**                       would not parse.  This permits keywords to sometimes
+**                       be used as identifiers, for example.
+**    YYACTIONTYPE       is the data type used for "action codes" - numbers
+**                       that indicate what to do in response to the next
+**                       token.
+**    ParseTOKENTYPE     is the data type used for minor type for terminal
+**                       symbols.  Background: A "minor type" is a semantic
+**                       value associated with a terminal or non-terminal
+**                       symbols.  For example, for an "ID" terminal symbol,
+**                       the minor type might be the name of the identifier.
+**                       Each non-terminal can have a different minor type.
+**                       Terminal symbols all have the same minor type, though.
+**                       This macros defines the minor type for terminal 
+**                       symbols.
+**    YYMINORTYPE        is the data type used for all minor types.
+**                       This is typically a union of many types, one of
+**                       which is ParseTOKENTYPE.  The entry in the union
+**                       for terminal symbols is called "yy0".
+**    YYSTACKDEPTH       is the maximum depth of the parser's stack.  If
+**                       zero the stack is dynamically sized using realloc()
+**    YYERRORSYMBOL      is the code number of the error symbol.  If not
+**                       defined, then do no error processing.
+**    YYNSTATE           the combined number of states.
+**    YYNRULE            the number of rules in the grammar
+**    YY_MAX_SHIFT       Maximum value for shift actions
+**    YY_MIN_SHIFTREDUCE Minimum value for shift-reduce actions
+**    YY_MAX_SHIFTREDUCE Maximum value for shift-reduce actions
+**    YY_MIN_REDUCE      Maximum value for reduce actions
+**    YY_ERROR_ACTION    The yy_action[] code for syntax error
+**    YY_ACCEPT_ACTION   The yy_action[] code for accept
+**    YY_NO_ACTION       The yy_action[] code for no-op
+*/
+#ifndef INTERFACE
+# define INTERFACE 1
+#endif
+/************* Begin control #defines *****************************************/
+#define YYCODETYPE unsigned char
+#define YYNOCODE 37
+#define YYACTIONTYPE unsigned char
+#define ParseTOKENTYPE std::string
+typedef union {
+  int yyinit;
+  yy_storage<ParseTOKENTYPE>::type yy0;
+  yy_storage<void>::type yy7;
+  yy_storage<command_ptr>::type yy17;
+  yy_storage<command_ptr_vector>::type yy35;
+  yy_storage<if_command::clause_vector_type>::type yy62;
+} YYMINORTYPE;
+#ifndef YYSTACKDEPTH
+#define YYSTACKDEPTH 100
+#endif
+#define ParseARG_SDECL
+#define ParseARG_PDECL
+#define ParseARG_FETCH
+#define ParseARG_STORE
+#define YYNSTATE             35
+#define YYNRULE              36
+#define YY_MAX_SHIFT         34
+#define YY_MIN_SHIFTREDUCE   61
+#define YY_MAX_SHIFTREDUCE   96
+#define YY_MIN_REDUCE        97
+#define YY_MAX_REDUCE        132
+#define YY_ERROR_ACTION      133
+#define YY_ACCEPT_ACTION     134
+#define YY_NO_ACTION         135
+/************* End control #defines *******************************************/
+namespace {
+
+/* Define the yytestcase() macro to be a no-op if is not already defined
+** otherwise.
+**
+** Applications can choose to define yytestcase() in the %include section
+** to a macro that can assist in verifying code coverage.  For production
+** code the yytestcase() macro should be turned off.  But it is useful
+** for testing.
+*/
+#ifndef yytestcase
+# define yytestcase(X)
+#endif
+
+
+/* Next are the tables used to determine what action to take based on the
+** current state and lookahead token.  These tables are used to implement
+** functions that take a state number and lookahead value and return an
+** action integer.  
+**
+** Suppose the action integer is N.  Then the action is determined as
+** follows
+**
+**   0 <= N <= YY_MAX_SHIFT             Shift N.  That is, push the lookahead
+**                                      token onto the stack and goto state N.
+**
+**   N between YY_MIN_SHIFTREDUCE       Shift to an arbitrary state then
+**     and YY_MAX_SHIFTREDUCE           reduce by rule N-YY_MIN_SHIFTREDUCE.
+**
+**   N between YY_MIN_REDUCE            Reduce by rule N-YY_MIN_REDUCE
+**     and YY_MAX_REDUCE
+**
+**   N == YY_ERROR_ACTION               A syntax error has occurred.
+**
+**   N == YY_ACCEPT_ACTION              The parser accepts its input.
+**
+**   N == YY_NO_ACTION                  No such action.  Denotes unused
+**                                      slots in the yy_action[] table.
+**
+** The action table is constructed as a single large table named yy_action[].
+** Given state S and lookahead X, the action is computed as either:
+**
+**    (A)   N = yy_action[ yy_shift_ofst[S] + X ]
+**    (B)   N = yy_default[S]
+**
+** The (A) formula is preferred.  The B formula is used instead if:
+**    (1)  The yy_shift_ofst[S]+X value is out of range, or
+**    (2)  yy_lookahead[yy_shift_ofst[S]+X] is not equal to X, or
+**    (3)  yy_shift_ofst[S] equal YY_SHIFT_USE_DFLT.
+** (Implementation note: YY_SHIFT_USE_DFLT is chosen so that
+** YY_SHIFT_USE_DFLT+X will be out of range for all possible lookaheads X.
+** Hence only tests (1) and (2) need to be evaluated.)
+**
+** The formulas above are for computing the action when the lookahead is
+** a terminal symbol.  If the lookahead is a non-terminal (as occurs after
+** a reduce action) then the yy_reduce_ofst[] array is used in place of
+** the yy_shift_ofst[] array and YY_REDUCE_USE_DFLT is used in place of
+** YY_SHIFT_USE_DFLT.
+**
+** The following are the tables generated in this section:
+**
+**  yy_action[]        A single table containing all actions.
+**  yy_lookahead[]     A table containing the lookahead for each entry in
+**                     yy_action.  Used to detect hash collisions.
+**  yy_shift_ofst[]    For each state, the offset into yy_action for
+**                     shifting terminals.
+**  yy_reduce_ofst[]   For each state, the offset into yy_action for
+**                     shifting non-terminals after a reduce.
+**  yy_default[]       Default action for each state.
+**
+*********** Begin parsing tables **********************************************/
+#define YY_ACTTAB_COUNT (193)
+static const YYACTIONTYPE yy_action[] = {
+ /*     0 */    86,   87,   66,   67,   68,   69,   70,   71,   12,   98,
+ /*    10 */    21,   77,   20,   19,   18,   16,   16,   86,   87,   66,
+ /*    20 */    67,   68,   69,   70,   71,   12,   97,   21,   76,   20,
+ /*    30 */    19,   18,   86,   87,   66,   67,   68,   69,   70,   71,
+ /*    40 */    12,   22,   21,   75,   20,   19,   18,   86,   87,   66,
+ /*    50 */    67,   68,   69,   70,   71,   12,   23,   21,   74,   20,
+ /*    60 */    19,   18,  117,  134,    5,    6,   86,   87,   66,   67,
+ /*    70 */    68,   69,   70,   71,   12,   24,   21,   25,   20,   19,
+ /*    80 */    18,   86,   87,   66,   67,   68,   69,   70,   71,   12,
+ /*    90 */     7,   21,   26,   20,   19,   18,   27,   96,   66,   67,
+ /*   100 */    68,   69,   70,   71,   12,    8,   21,    1,   20,   19,
+ /*   110 */    18,  121,   13,   32,    2,   13,   13,   13,   13,   13,
+ /*   120 */    13,    3,   31,  121,   13,   86,   87,   13,   13,   13,
+ /*   130 */    13,   13,   13,  119,   15,    9,    4,   15,   15,   15,
+ /*   140 */    15,   15,   15,  121,   14,   10,   73,   14,   14,   14,
+ /*   150 */    14,   14,   14,  101,   11,   28,  101,  101,  101,  101,
+ /*   160 */   101,  101,   99,   33,   99,   99,   33,   33,   33,   33,
+ /*   170 */    33,   33,   99,   34,   99,   99,   34,   34,   34,   34,
+ /*   180 */    34,   34,   30,   29,   28,   86,   87,   78,   99,   99,
+ /*   190 */    99,   17,   17,
+};
+static const YYCODETYPE yy_lookahead[] = {
+ /*     0 */     4,    5,    6,    7,    8,    9,   10,   11,   12,   24,
+ /*    10 */    14,   15,   16,   17,   18,   19,   20,    4,    5,    6,
+ /*    20 */     7,    8,    9,   10,   11,   12,   24,   14,   15,   16,
+ /*    30 */    17,   18,    4,    5,    6,    7,    8,    9,   10,   11,
+ /*    40 */    12,   24,   14,   15,   16,   17,   18,    4,    5,    6,
+ /*    50 */     7,    8,    9,   10,   11,   12,   24,   14,   15,   16,
+ /*    60 */    17,   18,    0,   22,   23,   26,    4,    5,    6,    7,
+ /*    70 */     8,    9,   10,   11,   12,   24,   14,   24,   16,   17,
+ /*    80 */    18,    4,    5,    6,    7,    8,    9,   10,   11,   12,
+ /*    90 */    26,   14,   24,   16,   17,   18,   24,    5,    6,    7,
+ /*   100 */     8,    9,   10,   11,   12,   26,   14,   26,   16,   17,
+ /*   110 */    18,   24,   25,   34,   26,   28,   29,   30,   31,   32,
+ /*   120 */    33,   26,   35,   24,   25,    4,    5,   28,   29,   30,
+ /*   130 */    31,   32,   33,   24,   25,   27,   26,   28,   29,   30,
+ /*   140 */    31,   32,   33,   24,   25,   27,   13,   28,   29,   30,
+ /*   150 */    31,   32,   33,   25,   27,    3,   28,   29,   30,   31,
+ /*   160 */    32,   33,   36,   25,   36,   36,   28,   29,   30,   31,
+ /*   170 */    32,   33,   36,   25,   36,   36,   28,   29,   30,   31,
+ /*   180 */    32,   33,    1,    2,    3,    4,    5,   15,   36,   36,
+ /*   190 */    36,   19,   20,
+};
+#define YY_SHIFT_USE_DFLT (193)
+#define YY_SHIFT_COUNT    (34)
+#define YY_SHIFT_MIN      (-4)
+#define YY_SHIFT_MAX      (181)
+static const short yy_shift_ofst[] = {
+ /*     0 */   193,   -4,   13,   28,   43,   62,   77,   77,   77,   92,
+ /*    10 */    92,   92,  193,  181,  181,  181,  121,  121,  121,  121,
+ /*    20 */   121,  121,  193,  193,  193,  193,  193,  193,  193,  193,
+ /*    30 */   193,  172,  133,  152,  152,
+};
+#define YY_REDUCE_USE_DFLT (-16)
+#define YY_REDUCE_COUNT (30)
+#define YY_REDUCE_MIN   (-15)
+#define YY_REDUCE_MAX   (148)
+static const short yy_reduce_ofst[] = {
+ /*     0 */    41,   87,   99,   99,   99,  109,   99,   99,  119,  128,
+ /*    10 */   138,  148,   79,  -15,  -15,    2,   17,   32,   51,   53,
+ /*    20 */    68,   72,   39,   64,   81,   88,   95,  110,  108,  118,
+ /*    30 */   127,
+};
+static const YYACTIONTYPE yy_default[] = {
+ /*     0 */   118,  133,  133,  133,  133,  133,  115,  116,  130,  133,
+ /*    10 */   133,  133,  120,  133,  108,  133,  133,  133,  133,  133,
+ /*    20 */   133,  133,  120,  120,  120,  120,  120,  120,  131,  131,
+ /*    30 */   131,  133,  133,  100,   99,
+};
+/********** End of lemon-generated parsing tables *****************************/
+
+/* The next table maps tokens (terminal symbols) into fallback tokens.  
+** If a construct like the following:
+** 
+**      %fallback ID X Y Z.
+**
+** appears in the grammar, then ID becomes a fallback token for X, Y,
+** and Z.  Whenever one of the tokens X, Y, or Z is input to the parser
+** but it does not parse, the type of the token is changed to ID and
+** the parse is retried before an error is thrown.
+**
+** This feature can be used, for example, to cause some keywords in a language
+** to revert to identifiers if they keyword does not apply in the context where
+** it appears.
+*/
+#ifdef YYFALLBACK
+const YYCODETYPE yyFallback[] = {
+};
+#endif /* YYFALLBACK */
+
+/* The following structure represents a single element of the
+** parser's stack.  Information stored includes:
+**
+**   +  The state number for the parser at this level of the stack.
+**
+**   +  The value of the token stored at this level of the stack.
+**      (In other words, the "major" token.)
+**
+**   +  The semantic value stored at this level of the stack.  This is
+**      the information used by the action routines in the grammar.
+**      It is sometimes called the "minor" token.
+**
+** After the "shift" half of a SHIFTREDUCE action, the stateno field
+** actually contains the reduce action for the second half of the
+** SHIFTREDUCE.
+*/
+struct yyStackEntry {
+  YYACTIONTYPE stateno;  /* The state-number, or reduce action in SHIFTREDUCE */
+  YYCODETYPE major;      /* The major token value.  This is the code
+                         ** number for the token at this stack level */
+  YYMINORTYPE minor;     /* The user-supplied minor token value.  This
+                         ** is the value of the token  */
+};
+
+/* The state of the parser is completely contained in an instance of
+** the following structure */
+
+#ifndef LEMON_SUPER
+#error "LEMON_SUPER must be defined."
+#endif
+
+/* outside the class so the templates above are still accessible */
+void yy_destructor(YYCODETYPE yymajor, YYMINORTYPE *yypminor);
+void yy_move(YYCODETYPE yymajor, YYMINORTYPE *yyDest, YYMINORTYPE *yySource);
+
+class yypParser : public LEMON_SUPER {
+  public:
+    //using LEMON_SUPER::LEMON_SUPER;
+
+    template<class ...Args>
+    yypParser(Args&&... args);
+
+    virtual ~yypParser() override final;
+    virtual void parse(int, ParseTOKENTYPE &&) override final;
+
+#ifndef NDEBUG
+    virtual void trace(FILE *, const char *) final override;
+#endif
+
+    virtual void reset() final override;
+    virtual bool will_accept() const final override;
+
+    /*
+    ** Return the peak depth of the stack for a parser.
+    */
+    #ifdef YYTRACKMAXSTACKDEPTH
+    int yypParser::stack_peak(){
+      return yyhwm;
+    }
+    #endif
+
+    const yyStackEntry *begin() const { return yystack; }
+    const yyStackEntry *end() const { return yytos + 1; }
+
+  protected:
+  private:
+  yyStackEntry *yytos;          /* Pointer to top element of the stack */
+#ifdef YYTRACKMAXSTACKDEPTH
+  int yyhwm = 0;                 /* Maximum value of yyidx */
+#endif
+#ifndef YYNOERRORRECOVERY
+  int yyerrcnt = -1;                 /* Shifts left before out of the error */
+#endif
+#if YYSTACKDEPTH<=0
+  int yystksz = 0;                  /* Current side of the stack */
+  yyStackEntry *yystack = nullptr;        /* The parser's stack */
+  yyStackEntry yystk0;          /* First stack entry */
+  int yyGrowStack();
+#else
+  yyStackEntry yystack[YYSTACKDEPTH];  /* The parser's stack */
+  yyStackEntry *yystackEnd;            /* Last entry in the stack */
+#endif
+
+
+
+  void yy_accept();
+  void yy_parse_failed();
+  void yy_syntax_error(int yymajor, ParseTOKENTYPE &yyminor);
+
+  void yy_transfer(yyStackEntry *yySource, yyStackEntry *yyDest);
+
+  void yy_pop_parser_stack();
+  unsigned yy_find_shift_action(int stateno, YYCODETYPE iLookAhead) const;
+  int yy_find_reduce_action(int stateno, YYCODETYPE iLookAhead) const;
+
+  void yy_shift(int yyNewState, int yyMajor, ParseTOKENTYPE &&yypMinor);
+  void yy_reduce(unsigned int yyruleno);
+  void yyStackOverflow();
+
+#ifndef NDEBUG
+  void yyTraceShift(int yyNewState) const;
+#else
+# define yyTraceShift(X)
+#endif
+
+
+#ifndef NDEBUG
+  FILE *yyTraceFILE = 0;
+  const char *yyTracePrompt = 0;
+#endif /* NDEBUG */
+
+  int yyidx() const {
+    return (int)(yytos - yystack);    
+  }
+
+};
+
+
+
+
+#ifndef NDEBUG
+/* 
+** Turn parser tracing on by giving a stream to which to write the trace
+** and a prompt to preface each trace message.  Tracing is turned off
+** by making either argument NULL 
+**
+** Inputs:
+** <ul>
+** <li> A FILE* to which trace output should be written.
+**      If NULL, then tracing is turned off.
+** <li> A prefix string written at the beginning of every
+**      line of trace output.  If NULL, then tracing is
+**      turned off.
+** </ul>
+**
+** Outputs:
+** None.
+*/
+void yypParser::trace(FILE *TraceFILE, const char *zTracePrompt){
+  yyTraceFILE = TraceFILE;
+  yyTracePrompt = zTracePrompt;
+  if( yyTraceFILE==0 ) yyTracePrompt = 0;
+  else if( yyTracePrompt==0 ) yyTraceFILE = 0;
+}
+#endif /* NDEBUG */
+
+#ifndef NDEBUG
+/* For tracing shifts, the names of all terminals and nonterminals
+** are required.  The following table supplies these names */
+const char *const yyTokenName[] = { 
+  "$",             "PIPE_PIPE",     "AMP_AMP",       "PIPE",        
+  "SEMI",          "NL",            "COMMAND",       "EVALUATE",    
+  "BREAK",         "CONTINUE",      "EXIT",          "ERROR",       
+  "LPAREN",        "RPAREN",        "BEGIN",         "END",         
+  "LOOP",          "FOR",           "IF",            "ELSE_IF",     
+  "ELSE",          "error",         "start",         "command_list",
+  "sep",           "command",       "compound_list",  "opt_nl",      
+  "term",          "if_command",    "begin_command",  "paren_command",
+  "loop_command",  "for_command",   "paren_list",    "else_command",
+};
+#endif /* NDEBUG */
+
+#ifndef NDEBUG
+/* For tracing reduce actions, the names of all rules are required.
+*/
+const char *const yyRuleName[] = {
+ /*   0 */ "command_list ::= command_list command sep",
+ /*   1 */ "compound_list ::= compound_list command sep",
+ /*   2 */ "command ::= command PIPE_PIPE opt_nl command",
+ /*   3 */ "command ::= command AMP_AMP opt_nl command",
+ /*   4 */ "command ::= command PIPE opt_nl command",
+ /*   5 */ "term ::= COMMAND",
+ /*   6 */ "term ::= EVALUATE",
+ /*   7 */ "term ::= BREAK",
+ /*   8 */ "term ::= CONTINUE",
+ /*   9 */ "term ::= EXIT",
+ /*  10 */ "term ::= ERROR",
+ /*  11 */ "paren_list ::= compound_list command",
+ /*  12 */ "paren_command ::= LPAREN paren_list RPAREN",
+ /*  13 */ "begin_command ::= BEGIN sep compound_list END",
+ /*  14 */ "loop_command ::= LOOP sep compound_list END",
+ /*  15 */ "for_command ::= FOR sep compound_list END",
+ /*  16 */ "if_command ::= IF sep compound_list END",
+ /*  17 */ "if_command ::= IF sep compound_list else_command END",
+ /*  18 */ "else_command ::= ELSE_IF|ELSE sep compound_list",
+ /*  19 */ "else_command ::= else_command ELSE_IF|ELSE sep compound_list",
+ /*  20 */ "start ::= command_list",
+ /*  21 */ "command_list ::=",
+ /*  22 */ "command_list ::= command_list sep",
+ /*  23 */ "compound_list ::=",
+ /*  24 */ "compound_list ::= compound_list sep",
+ /*  25 */ "sep ::= SEMI",
+ /*  26 */ "sep ::= NL",
+ /*  27 */ "command ::= term",
+ /*  28 */ "term ::= if_command",
+ /*  29 */ "term ::= begin_command",
+ /*  30 */ "term ::= paren_command",
+ /*  31 */ "term ::= loop_command",
+ /*  32 */ "term ::= for_command",
+ /*  33 */ "paren_list ::= compound_list",
+ /*  34 */ "opt_nl ::=",
+ /*  35 */ "opt_nl ::= opt_nl NL",
+};
+#endif /* NDEBUG */
+
+
+#if YYSTACKDEPTH<=0
+/*
+** Try to increase the size of the parser stack.  Return the number
+** of errors.  Return 0 on success.
+*/
+int yypParser::yyGrowStack(){
+  int newSize;
+  yyStackEntry *pNew;
+  yyStackEntry *pOld = yystack;
+  int oldSize = yystksz;
+
+  newSize = oldSize*2 + 100;
+  pNew = (yyStackEntry *)calloc(newSize, sizeof(pNew[0]));
+  if( pNew ){
+    yystack = pNew;
+    for (int i = 0; i < oldSize; ++i) {
+      pNew[i].stateno = pOld[i].stateno;
+      pNew[i].major = pOld[i].major;
+      yy_move(pOld[i].major, &pNew[i].minor, &pOld[i].minor);
+    }
+    if (pOld != &yystk0) free(pOld);
+#ifndef NDEBUG
+    if( yyTraceFILE ){
+      fprintf(yyTraceFILE,"%sStack grows from %d to %d entries.\n",
+              yyTracePrompt, yystksz, newSize);
+    }
+#endif
+    yystksz = newSize;
+  }
+  return pNew==0; 
+}
+#endif
+
+
+/* The following function deletes the "minor type" or semantic value
+** associated with a symbol.  The symbol can be either a terminal
+** or nonterminal. "yymajor" is the symbol code, and "yypminor" is
+** a pointer to the value to be deleted.  The code used to do the 
+** deletions is derived from the %destructor and/or %token_destructor
+** directives of the input grammar.
+*/
+void yy_destructor(
+  YYCODETYPE yymajor,     /* Type code for object to destroy */
+  YYMINORTYPE *yypminor   /* The object to be destroyed */
+){
+  switch( yymajor ){
+    /* Here is inserted the actions which take place when a
+    ** terminal or non-terminal is destroyed.  This can happen
+    ** when the symbol is popped from the stack during a
+    ** reduce or during error processing or when a parser is 
+    ** being destroyed before it is finished parsing.
+    **
+    ** Note: during a reduce, the only symbols destroyed are those
+    ** which appear on the RHS of the rule, but which are *not* used
+    ** inside the C code.
+    */
+/********* Begin destructor definitions ***************************************/
+    case 1: /* PIPE_PIPE */
+    case 2: /* AMP_AMP */
+    case 3: /* PIPE */
+    case 4: /* SEMI */
+    case 5: /* NL */
+    case 6: /* COMMAND */
+    case 7: /* EVALUATE */
+    case 8: /* BREAK */
+    case 9: /* CONTINUE */
+    case 10: /* EXIT */
+    case 11: /* ERROR */
+    case 12: /* LPAREN */
+    case 13: /* RPAREN */
+    case 14: /* BEGIN */
+    case 15: /* END */
+    case 16: /* LOOP */
+    case 17: /* FOR */
+    case 18: /* IF */
+    case 19: /* ELSE_IF */
+    case 20: /* ELSE */
+      yy_destructor<std::string>(std::addressof(yypminor->yy0));
+      break;
+    case 0: /* $ */
+    case 22: /* start */
+    case 23: /* command_list */
+      yy_destructor<void>(std::addressof(yypminor->yy7));
+      break;
+    case 24: /* sep */
+    case 25: /* command */
+    case 27: /* opt_nl */
+    case 28: /* term */
+    case 29: /* if_command */
+    case 30: /* begin_command */
+    case 31: /* paren_command */
+    case 32: /* loop_command */
+    case 33: /* for_command */
+      yy_destructor<command_ptr>(std::addressof(yypminor->yy17));
+      break;
+    case 26: /* compound_list */
+    case 34: /* paren_list */
+      yy_destructor< command_ptr_vector >(std::addressof(yypminor->yy35));
+      break;
+    case 35: /* else_command */
+      yy_destructor< if_command::clause_vector_type >(std::addressof(yypminor->yy62));
+      break;
+/********* End destructor definitions *****************************************/
+    default:  break;   /* If no destructor action specified: do nothing */
+  }
+}
+
+
+/*
+ * moves an object (such as when growing the stack). 
+ * Source is constructed.
+ * Destination is also destructed.
+ * 
+ */
+void yy_move(
+  YYCODETYPE yymajor,     /* Type code for object to move */
+  YYMINORTYPE *yyDest,     /*  */
+  YYMINORTYPE *yySource     /*  */
+){
+  switch( yymajor ){
+
+/********* Begin move definitions ***************************************/
+    case 1: /* PIPE_PIPE */
+    case 2: /* AMP_AMP */
+    case 3: /* PIPE */
+    case 4: /* SEMI */
+    case 5: /* NL */
+    case 6: /* COMMAND */
+    case 7: /* EVALUATE */
+    case 8: /* BREAK */
+    case 9: /* CONTINUE */
+    case 10: /* EXIT */
+    case 11: /* ERROR */
+    case 12: /* LPAREN */
+    case 13: /* RPAREN */
+    case 14: /* BEGIN */
+    case 15: /* END */
+    case 16: /* LOOP */
+    case 17: /* FOR */
+    case 18: /* IF */
+    case 19: /* ELSE_IF */
+    case 20: /* ELSE */
+      yy_move<std::string>(std::addressof(yyDest->yy0), std::addressof(yySource->yy0));
+      break;
+    case 0: /* $ */
+    case 22: /* start */
+    case 23: /* command_list */
+      yy_move<void>(std::addressof(yyDest->yy7), std::addressof(yySource->yy7));
+      break;
+    case 24: /* sep */
+    case 25: /* command */
+    case 27: /* opt_nl */
+    case 28: /* term */
+    case 29: /* if_command */
+    case 30: /* begin_command */
+    case 31: /* paren_command */
+    case 32: /* loop_command */
+    case 33: /* for_command */
+      yy_move<command_ptr>(std::addressof(yyDest->yy17), std::addressof(yySource->yy17));
+      break;
+    case 26: /* compound_list */
+    case 34: /* paren_list */
+      yy_move< command_ptr_vector >(std::addressof(yyDest->yy35), std::addressof(yySource->yy35));
+      break;
+    case 35: /* else_command */
+      yy_move< if_command::clause_vector_type >(std::addressof(yyDest->yy62), std::addressof(yySource->yy62));
+      break;
+/********* End move definitions *****************************************/
+    default:  break;   /* If no move action specified: do nothing */
+      //yyDest.minor = yySource.minor;
+  }
+}
+
+
+/*
+** Pop the parser's stack once.
+**
+** If there is a destructor routine associated with the token which
+** is popped from the stack, then call it.
+*/
+void yypParser::yy_pop_parser_stack(){
+  yyStackEntry *yymsp;
+  assert( yytos!=0 );
+  assert( yytos > yystack );
+  yymsp = yytos--;
+#ifndef NDEBUG
+  if( yyTraceFILE ){
+    fprintf(yyTraceFILE,"%sPopping %s\n",
+      yyTracePrompt,
+      yyTokenName[yymsp->major]);
+  }
+#endif
+  yy_destructor(yymsp->major, &yymsp->minor);
+}
+
+
+template<class ...Args>
+yypParser::yypParser(Args&&... args) : LEMON_SUPER(std::forward<Args>(args)...)
+{
+#if YYSTACKDEPTH<=0
+  if( yyGrowStack() ){
+    yystack = &yystk0;
+    yystksz = 1;
+  }
+#else
+  std::memset(yystack, 0, sizeof(yystack));
+#endif
+
+  yytos = yystack;
+  yystack[0].stateno = 0;
+  yystack[0].major = 0;
+#if YYSTACKDEPTH>0
+  yystackEnd = &yystack[YYSTACKDEPTH-1];
+#endif
+}
+
+void yypParser::reset() {
+
+  while( yytos>yystack ) yy_pop_parser_stack();
+
+#ifndef YYNOERRORRECOVERY
+  yyerrcnt = -1;
+#endif
+
+  yytos = yystack;
+  yystack[0].stateno = 0;
+  yystack[0].major = 0;
+
+  LEMON_SUPER::reset();
+}
+
+
+/* 
+** Deallocate and destroy a parser.  Destructors are called for
+** all stack elements before shutting the parser down.
+**
+** If the YYPARSEFREENEVERNULL macro exists (for example because it
+** is defined in a %include section of the input grammar) then it is
+** assumed that the input pointer is never NULL.
+*/
+
+yypParser::~yypParser() {
+  while( yytos>yystack ) yy_pop_parser_stack();
+#if YYSTACKDEPTH<=0
+  if( yystack!=&yystk0 ) free(yystack);
+#endif
+}
+
+/*
+** Find the appropriate action for a parser given the terminal
+** look-ahead token iLookAhead.
+*/
+unsigned yypParser::yy_find_shift_action(
+  int stateno,              /* Current state number */
+  YYCODETYPE iLookAhead     /* The look-ahead token */
+) const {
+  int i;
+ 
+  if( stateno>=YY_MIN_REDUCE ) return stateno;
+  assert( stateno <= YY_SHIFT_COUNT );
+  do{
+    i = yy_shift_ofst[stateno];
+    assert( iLookAhead!=YYNOCODE );
+    i += iLookAhead;
+    if( i<0 || i>=YY_ACTTAB_COUNT || yy_lookahead[i]!=iLookAhead ){
+#ifdef YYFALLBACK
+      YYCODETYPE iFallback;            /* Fallback token */
+      if( iLookAhead<sizeof(yyFallback)/sizeof(yyFallback[0])
+             && (iFallback = yyFallback[iLookAhead])!=0 ){
+#ifndef NDEBUG
+        if( yyTraceFILE ){
+          fprintf(yyTraceFILE, "%sFALLBACK %s => %s\n",
+             yyTracePrompt, yyTokenName[iLookAhead], yyTokenName[iFallback]);
+        }
+#endif
+        assert( yyFallback[iFallback]==0 ); /* Fallback loop must terminate */
+        iLookAhead = iFallback;
+        continue;
+      }
+#endif
+#ifdef YYWILDCARD
+      {
+        int j = i - iLookAhead + YYWILDCARD;
+        if( 
+#if YY_SHIFT_MIN+YYWILDCARD<0
+          j>=0 &&
+#endif
+#if YY_SHIFT_MAX+YYWILDCARD>=YY_ACTTAB_COUNT
+          j<YY_ACTTAB_COUNT &&
+#endif
+          yy_lookahead[j]==YYWILDCARD && iLookAhead>0
+        ){
+#ifndef NDEBUG
+          if( yyTraceFILE ){
+            fprintf(yyTraceFILE, "%sWILDCARD %s => %s\n",
+               yyTracePrompt, yyTokenName[iLookAhead],
+               yyTokenName[YYWILDCARD]);
+          }
+#endif /* NDEBUG */
+          return yy_action[j];
+        }
+      }
+#endif /* YYWILDCARD */
+      return yy_default[stateno];
+    }else{
+      return yy_action[i];
+    }
+  }while(1);
+}
+
+/*
+** Find the appropriate action for a parser given the non-terminal
+** look-ahead token iLookAhead.
+*/
+int yypParser::yy_find_reduce_action(
+  int stateno,              /* Current state number */
+  YYCODETYPE iLookAhead     /* The look-ahead token */
+) const {
+  int i;
+#ifdef YYERRORSYMBOL
+  if( stateno>YY_REDUCE_COUNT ){
+    return yy_default[stateno];
+  }
+#else
+  assert( stateno<=YY_REDUCE_COUNT );
+#endif
+  i = yy_reduce_ofst[stateno];
+  assert( i!=YY_REDUCE_USE_DFLT );
+  assert( iLookAhead!=YYNOCODE );
+  i += iLookAhead;
+#ifdef YYERRORSYMBOL
+  if( i<0 || i>=YY_ACTTAB_COUNT || yy_lookahead[i]!=iLookAhead ){
+    return yy_default[stateno];
+  }
+#else
+  assert( i>=0 && i<YY_ACTTAB_COUNT );
+  assert( yy_lookahead[i]==iLookAhead );
+#endif
+  return yy_action[i];
+}
+
+/*
+** The following routine is called if the stack overflows.
+*/
+void yypParser::yyStackOverflow(){
+#ifndef NDEBUG
+   if( yyTraceFILE ){
+     fprintf(yyTraceFILE,"%sStack Overflow!\n",yyTracePrompt);
+   }
+#endif
+   while( yytos>yystack ) yy_pop_parser_stack();
+   /* Here code is inserted which will execute if the parser
+   ** stack every overflows */
+/******** Begin %stack_overflow code ******************************************/
+/******** End %stack_overflow code ********************************************/
+  LEMON_SUPER::stack_overflow();
+}
+
+/*
+** Print tracing information for a SHIFT action
+*/
+#ifndef NDEBUG
+void yypParser::yyTraceShift(int yyNewState) const {
+  if( yyTraceFILE ){
+    if( yyNewState<YYNSTATE ){
+      fprintf(yyTraceFILE,"%sShift '%s', go to state %d\n",
+         yyTracePrompt,yyTokenName[yytos->major],
+         yyNewState);
+    }else{
+      fprintf(yyTraceFILE,"%sShift '%s'\n",
+         yyTracePrompt,yyTokenName[yytos->major]);
+    }
+  }
+}
+#endif
+
+/*
+** Perform a shift action.
+*/
+void yypParser::yy_shift(
+  int yyNewState,               /* The new state to shift in */
+  int yyMajor,                  /* The major token to shift in */
+  ParseTOKENTYPE &&yyMinor      /* The minor token to shift in */
+){
+  yytos++;
+#ifdef YYTRACKMAXSTACKDEPTH
+  if( yyidx()>yyhwm ){
+    yyhwm++;
+    assert(yyhwm == yyidx());
+  }
+#endif
+#if YYSTACKDEPTH>0 
+  if( yytos>yystackEnd ){
+    yytos--;
+    yyStackOverflow();
+    return;
+  }
+#else
+  if( yytos>=&yystack[yystksz] ){
+    if( yyGrowStack() ){
+      yytos--;
+      yyStackOverflow();
+      return;
+    }
+  }
+#endif
+  if( yyNewState > YY_MAX_SHIFT ){
+    yyNewState += YY_MIN_REDUCE - YY_MIN_SHIFTREDUCE;
+  }
+  yytos->stateno = (YYACTIONTYPE)yyNewState;
+  yytos->major = (YYCODETYPE)yyMajor;
+  //yytos->minor.yy0 = yyMinor;
+  //yy_move also calls the destructor...
+  //yy_move<ParseTOKENTYPE>(std::addressof(yytos->minor.yy0), std::addressof(yyMinor));
+  yy_constructor<ParseTOKENTYPE>(std::addressof(yytos->minor.yy0), std::move(yyMinor));
+  yyTraceShift(yyNewState);
+}
+
+/* The following table contains information about every rule that
+** is used during the reduce.
+*/
+static const struct {
+  YYCODETYPE lhs;       /* Symbol on the left-hand side of the rule */
+  signed char nrhs;     /* Negative of the number of RHS symbols in the rule */
+} yyRuleInfo[] = {
+  { 23, -3 },
+  { 26, -3 },
+  { 25, -4 },
+  { 25, -4 },
+  { 25, -4 },
+  { 28, -1 },
+  { 28, -1 },
+  { 28, -1 },
+  { 28, -1 },
+  { 28, -1 },
+  { 28, -1 },
+  { 34, -2 },
+  { 31, -3 },
+  { 30, -4 },
+  { 32, -4 },
+  { 33, -4 },
+  { 29, -4 },
+  { 29, -5 },
+  { 35, -3 },
+  { 35, -4 },
+  { 22, -1 },
+  { 23, 0 },
+  { 23, -2 },
+  { 26, 0 },
+  { 26, -2 },
+  { 24, -1 },
+  { 24, -1 },
+  { 25, -1 },
+  { 28, -1 },
+  { 28, -1 },
+  { 28, -1 },
+  { 28, -1 },
+  { 28, -1 },
+  { 34, -1 },
+  { 27, 0 },
+  { 27, -2 },
+};
+
+/*
+** Perform a reduce action and the shift that must immediately
+** follow the reduce.
+*/
+void yypParser::yy_reduce(
+  unsigned int yyruleno           /* Number of the rule by which to reduce */
+){
+  int yygoto;                     /* The next state */
+  int yyact;                      /* The next action */
+  yyStackEntry *yymsp;            /* The top of the parser's stack */
+  int yysize;                     /* Amount to pop the stack */
+  yymsp = yytos;
+#ifndef NDEBUG
+  if( yyTraceFILE && yyruleno<(int)(sizeof(yyRuleName)/sizeof(yyRuleName[0])) ){
+    yysize = yyRuleInfo[yyruleno].nrhs;
+    fprintf(yyTraceFILE, "%sReduce [%s], go to state %d.\n", yyTracePrompt,
+      yyRuleName[yyruleno], yymsp[yysize].stateno);
+  }
+#endif /* NDEBUG */
+
+  /* Check that the stack is large enough to grow by a single entry
+  ** if the RHS of the rule is empty.  This ensures that there is room
+  ** enough on the stack to push the LHS value */
+  if( yyRuleInfo[yyruleno].nrhs==0 ){
+#ifdef YYTRACKMAXSTACKDEPTH
+    if( yyidx()>yyhwm ){
+      yyhwm++;
+      assert(yyhwm == yyidx());
+    }
+#endif
+#if YYSTACKDEPTH>0 
+    if( yytos>=yystackEnd ){
+      yyStackOverflow();
+      return;
+    }
+#else
+    if( yytos>=&yystack[yystksz-1] ){
+      if( yyGrowStack() ){
+        yyStackOverflow();
+        return;
+      }
+      yymsp = yytos;
+    }
+#endif
+  }
+
+  switch( yyruleno ){
+  /* Beginning here are the reduction cases.  A typical example
+  ** follows:
+  **   case 0:
+  **  #line <lineno> <grammarfile>
+  **     { ... }           // User supplied code
+  **  #line <lineno> <thisfile>
+  **     break;
+  */
+/********** Begin reduce actions **********************************************/
+      case 0: /* command_list ::= command_list command sep */
+{
+  yy_destructor<void>(std::addressof(yymsp[-2].minor.yy7));
+  yy_destructor<command_ptr>(std::addressof(yymsp[0].minor.yy17));
+  auto &C=yy_cast< command_ptr >(std::addressof(yymsp[-1].minor.yy17));
+#line 95 "phase3.lemon"
+{
+	if (C) command_queue.emplace_back(std::move(C));
+}
+#line 1124 "phase3.cpp"
+  yy_destructor(C);
+  yy_constructor<void>(std::addressof(yymsp[-2].minor.yy7));
+}
+        break;
+      case 1: /* compound_list ::= compound_list command sep */
+{
+  yy_destructor<command_ptr>(std::addressof(yymsp[0].minor.yy17));
+  auto &L=yy_cast< command_ptr_vector >(std::addressof(yymsp[-2].minor.yy35));
+  auto &C=yy_cast< command_ptr >(std::addressof(yymsp[-1].minor.yy17));
+#line 111 "phase3.lemon"
+{
+	if (C) L.emplace_back(std::move(C));
+}
+#line 1138 "phase3.cpp"
+  yy_destructor(C);
+}
+        break;
+      case 2: /* command ::= command PIPE_PIPE opt_nl command */
+{
+  yy_destructor<std::string>(std::addressof(yymsp[-2].minor.yy0));
+  yy_destructor<command_ptr>(std::addressof(yymsp[-1].minor.yy17));
+   command_ptr  RV;
+  auto &L=yy_cast< command_ptr >(std::addressof(yymsp[-3].minor.yy17));
+  auto &R=yy_cast< command_ptr >(std::addressof(yymsp[0].minor.yy17));
+#line 124 "phase3.lemon"
+{
+	RV = std::make_unique<or_command>(std::move(L), std::move(R));
+}
+#line 1153 "phase3.cpp"
+  yy_destructor(L);
+  yy_destructor(R);
+  yy_constructor< command_ptr >(std::addressof(yymsp[-3].minor.yy17), std::move(RV));
+}
+        break;
+      case 3: /* command ::= command AMP_AMP opt_nl command */
+{
+  yy_destructor<std::string>(std::addressof(yymsp[-2].minor.yy0));
+  yy_destructor<command_ptr>(std::addressof(yymsp[-1].minor.yy17));
+   command_ptr  RV;
+  auto &L=yy_cast< command_ptr >(std::addressof(yymsp[-3].minor.yy17));
+  auto &R=yy_cast< command_ptr >(std::addressof(yymsp[0].minor.yy17));
+#line 128 "phase3.lemon"
+{
+	RV = std::make_unique<and_command>(std::move(L), std::move(R));
+}
+#line 1170 "phase3.cpp"
+  yy_destructor(L);
+  yy_destructor(R);
+  yy_constructor< command_ptr >(std::addressof(yymsp[-3].minor.yy17), std::move(RV));
+}
+        break;
+      case 4: /* command ::= command PIPE opt_nl command */
+{
+  yy_destructor<std::string>(std::addressof(yymsp[-2].minor.yy0));
+  yy_destructor<command_ptr>(std::addressof(yymsp[-1].minor.yy17));
+   command_ptr  RV;
+  auto &L=yy_cast< command_ptr >(std::addressof(yymsp[-3].minor.yy17));
+  auto &R=yy_cast< command_ptr >(std::addressof(yymsp[0].minor.yy17));
+#line 132 "phase3.lemon"
+{
+	RV = std::make_unique<pipe_command>(std::move(L), std::move(R));
+}
+#line 1187 "phase3.cpp"
+  yy_destructor(L);
+  yy_destructor(R);
+  yy_constructor< command_ptr >(std::addressof(yymsp[-3].minor.yy17), std::move(RV));
+}
+        break;
+      case 5: /* term ::= COMMAND */
+{
+  command_ptr RV;
+  auto &C=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+#line 138 "phase3.lemon"
+{ RV = std::make_unique<simple_command>(std::move(C)); }
+#line 1199 "phase3.cpp"
+  yy_destructor(C);
+  yy_constructor<command_ptr>(std::addressof(yymsp[0].minor.yy17), std::move(RV));
+}
+        break;
+      case 6: /* term ::= EVALUATE */
+{
+  command_ptr RV;
+  auto &C=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+#line 139 "phase3.lemon"
+{ RV = std::make_unique<evaluate_command>(std::move(C)); }
+#line 1210 "phase3.cpp"
+  yy_destructor(C);
+  yy_constructor<command_ptr>(std::addressof(yymsp[0].minor.yy17), std::move(RV));
+}
+        break;
+      case 7: /* term ::= BREAK */
+{
+  command_ptr RV;
+  auto &C=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+#line 140 "phase3.lemon"
+{ RV = std::make_unique<break_command>(std::move(C)); }
+#line 1221 "phase3.cpp"
+  yy_destructor(C);
+  yy_constructor<command_ptr>(std::addressof(yymsp[0].minor.yy17), std::move(RV));
+}
+        break;
+      case 8: /* term ::= CONTINUE */
+{
+  command_ptr RV;
+  auto &C=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+#line 141 "phase3.lemon"
+{ RV = std::make_unique<continue_command>(std::move(C)); }
+#line 1232 "phase3.cpp"
+  yy_destructor(C);
+  yy_constructor<command_ptr>(std::addressof(yymsp[0].minor.yy17), std::move(RV));
+}
+        break;
+      case 9: /* term ::= EXIT */
+{
+  command_ptr RV;
+  auto &C=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+#line 142 "phase3.lemon"
+{ RV = std::make_unique<exit_command>(std::move(C)); }
+#line 1243 "phase3.cpp"
+  yy_destructor(C);
+  yy_constructor<command_ptr>(std::addressof(yymsp[0].minor.yy17), std::move(RV));
+}
+        break;
+      case 10: /* term ::= ERROR */
+{
+  command_ptr RV;
+  auto &C=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+  const int yymsp_1_major = yymsp[0].major; /* @C */
+#line 151 "phase3.lemon"
+{
+	RV = std::make_unique<error_command>(yymsp_1_major, std::move(C));
+}
+#line 1257 "phase3.cpp"
+  yy_destructor(C);
+  yy_constructor<command_ptr>(std::addressof(yymsp[0].minor.yy17), std::move(RV));
+}
+        break;
+      case 11: /* paren_list ::= compound_list command */
+{
+  auto &L=yy_cast< command_ptr_vector >(std::addressof(yymsp[-1].minor.yy35));
+  auto &C=yy_cast< command_ptr >(std::addressof(yymsp[0].minor.yy17));
+#line 180 "phase3.lemon"
+{
+	L.emplace_back(std::move(C));
+}
+#line 1270 "phase3.cpp"
+  yy_destructor(C);
+}
+        break;
+      case 12: /* paren_command ::= LPAREN paren_list RPAREN */
+{
+  command_ptr RV;
+  auto &T=yy_cast<std::string>(std::addressof(yymsp[-2].minor.yy0));
+  auto &L=yy_cast< command_ptr_vector >(std::addressof(yymsp[-1].minor.yy35));
+  auto &E=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+  const int yymsp_1_major = yymsp[-2].major; /* @T */
+#line 184 "phase3.lemon"
+{
+	RV = std::make_unique<begin_command>(yymsp_1_major, std::move(L), std::move(T), std::move(E));
+}
+#line 1285 "phase3.cpp"
+  yy_destructor(T);
+  yy_destructor(L);
+  yy_destructor(E);
+  yy_constructor<command_ptr>(std::addressof(yymsp[-2].minor.yy17), std::move(RV));
+}
+        break;
+      case 13: /* begin_command ::= BEGIN sep compound_list END */
+{
+  yy_destructor<command_ptr>(std::addressof(yymsp[-2].minor.yy17));
+  command_ptr RV;
+  auto &T=yy_cast<std::string>(std::addressof(yymsp[-3].minor.yy0));
+  auto &L=yy_cast< command_ptr_vector >(std::addressof(yymsp[-1].minor.yy35));
+  auto &E=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+  const int yymsp_1_major = yymsp[-3].major; /* @T */
+#line 189 "phase3.lemon"
+{
+	RV = std::make_unique<begin_command>(yymsp_1_major, std::move(L), std::move(T), std::move(E));
+}
+#line 1304 "phase3.cpp"
+  yy_destructor(T);
+  yy_destructor(L);
+  yy_destructor(E);
+  yy_constructor<command_ptr>(std::addressof(yymsp[-3].minor.yy17), std::move(RV));
+}
+        break;
+      case 14: /* loop_command ::= LOOP sep compound_list END */
+{
+  yy_destructor<command_ptr>(std::addressof(yymsp[-2].minor.yy17));
+  command_ptr RV;
+  auto &T=yy_cast<std::string>(std::addressof(yymsp[-3].minor.yy0));
+  auto &L=yy_cast< command_ptr_vector >(std::addressof(yymsp[-1].minor.yy35));
+  auto &E=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+  const int yymsp_1_major = yymsp[-3].major; /* @T */
+#line 194 "phase3.lemon"
+{
+	RV = std::make_unique<loop_command>(yymsp_1_major, std::move(L), std::move(T), std::move(E));
+}
+#line 1323 "phase3.cpp"
+  yy_destructor(T);
+  yy_destructor(L);
+  yy_destructor(E);
+  yy_constructor<command_ptr>(std::addressof(yymsp[-3].minor.yy17), std::move(RV));
+}
+        break;
+      case 15: /* for_command ::= FOR sep compound_list END */
+{
+  yy_destructor<command_ptr>(std::addressof(yymsp[-2].minor.yy17));
+  command_ptr RV;
+  auto &T=yy_cast<std::string>(std::addressof(yymsp[-3].minor.yy0));
+  auto &L=yy_cast< command_ptr_vector >(std::addressof(yymsp[-1].minor.yy35));
+  auto &E=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+  const int yymsp_1_major = yymsp[-3].major; /* @T */
+#line 198 "phase3.lemon"
+{
+	RV = std::make_unique<for_command>(yymsp_1_major, std::move(L), std::move(T), std::move(E));
+}
+#line 1342 "phase3.cpp"
+  yy_destructor(T);
+  yy_destructor(L);
+  yy_destructor(E);
+  yy_constructor<command_ptr>(std::addressof(yymsp[-3].minor.yy17), std::move(RV));
+}
+        break;
+      case 16: /* if_command ::= IF sep compound_list END */
+{
+  yy_destructor<command_ptr>(std::addressof(yymsp[-2].minor.yy17));
+  command_ptr RV;
+  auto &I=yy_cast<std::string>(std::addressof(yymsp[-3].minor.yy0));
+  auto &L=yy_cast< command_ptr_vector >(std::addressof(yymsp[-1].minor.yy35));
+  auto &E=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+#line 202 "phase3.lemon"
+{
+
+	if_command::clause_vector_type v;
+	v.emplace_back(std::make_unique<if_else_clause>(IF, std::move(L), std::move(I)));
+
+	RV = std::make_unique<if_command>(
+		std::move(v),
+		std::move(E)
+	);
+
+}
+#line 1368 "phase3.cpp"
+  yy_destructor(I);
+  yy_destructor(L);
+  yy_destructor(E);
+  yy_constructor<command_ptr>(std::addressof(yymsp[-3].minor.yy17), std::move(RV));
+}
+        break;
+      case 17: /* if_command ::= IF sep compound_list else_command END */
+{
+  yy_destructor<command_ptr>(std::addressof(yymsp[-3].minor.yy17));
+  command_ptr RV;
+  auto &I=yy_cast<std::string>(std::addressof(yymsp[-4].minor.yy0));
+  auto &L=yy_cast< command_ptr_vector >(std::addressof(yymsp[-2].minor.yy35));
+  auto &EC=yy_cast< if_command::clause_vector_type >(std::addressof(yymsp[-1].minor.yy62));
+  auto &E=yy_cast<std::string>(std::addressof(yymsp[0].minor.yy0));
+#line 214 "phase3.lemon"
+{
+
+	if_command::clause_vector_type v;
+	v.emplace_back(std::make_unique<if_else_clause>(IF, std::move(L), std::move(I)));
+	for(auto &c : EC) { v.emplace_back(std::move(c)); }
+
+	RV = std::make_unique<if_command>(
+		std::move(v), std::move(E));	
+}
+#line 1393 "phase3.cpp"
+  yy_destructor(I);
+  yy_destructor(L);
+  yy_destructor(EC);
+  yy_destructor(E);
+  yy_constructor<command_ptr>(std::addressof(yymsp[-4].minor.yy17), std::move(RV));
+}
+        break;
+      case 18: /* else_command ::= ELSE_IF|ELSE sep compound_list */
+{
+  yy_destructor<command_ptr>(std::addressof(yymsp[-1].minor.yy17));
+   if_command::clause_vector_type  RV;
+  auto &E=yy_cast<std::string>(std::addressof(yymsp[-2].minor.yy0));
+  auto &L=yy_cast< command_ptr_vector >(std::addressof(yymsp[0].minor.yy35));
+  const int yymsp_1_major = yymsp[-2].major; /* @E */
+#line 227 "phase3.lemon"
+{
+	RV.emplace_back(std::make_unique<if_else_clause>(yymsp_1_major, std::move(L), std::move(E)));
+}
+#line 1412 "phase3.cpp"
+  yy_destructor(E);
+  yy_destructor(L);
+  yy_constructor< if_command::clause_vector_type >(std::addressof(yymsp[-2].minor.yy62), std::move(RV));
+}
+        break;
+      case 19: /* else_command ::= else_command ELSE_IF|ELSE sep compound_list */
+{
+  yy_destructor<command_ptr>(std::addressof(yymsp[-1].minor.yy17));
+  auto &EC=yy_cast< if_command::clause_vector_type >(std::addressof(yymsp[-3].minor.yy62));
+  auto &E=yy_cast<std::string>(std::addressof(yymsp[-2].minor.yy0));
+  auto &L=yy_cast< command_ptr_vector >(std::addressof(yymsp[0].minor.yy35));
+  const int yymsp_2_major = yymsp[-2].major; /* @E */
+#line 232 "phase3.lemon"
+{
+	EC.emplace_back(std::make_unique<if_else_clause>(yymsp_2_major, std::move(L), std::move(E)));
+}
+#line 1429 "phase3.cpp"
+  yy_destructor(E);
+  yy_destructor(L);
+}
+        break;
+      case 20: /* start ::= command_list */
+{
+  yy_destructor<void>(std::addressof(yymsp[0].minor.yy7));
+  yy_constructor<void>(std::addressof(yymsp[0].minor.yy7));
+}
+        break;
+      case 21: /* command_list ::= */
+  yy_constructor<void>(std::addressof(yymsp[1].minor.yy7));
+        break;
+      case 22: /* command_list ::= command_list sep */
+{
+  yy_destructor<void>(std::addressof(yymsp[-1].minor.yy7));
+  yy_destructor<command_ptr>(std::addressof(yymsp[0].minor.yy17));
+  yy_constructor<void>(std::addressof(yymsp[-1].minor.yy7));
+}
+        break;
+      case 23: /* compound_list ::= */
+  yy_constructor< command_ptr_vector >(std::addressof(yymsp[1].minor.yy35));
+        break;
+      case 24: /* compound_list ::= compound_list sep */
+{
+  yy_destructor<command_ptr>(std::addressof(yymsp[0].minor.yy17));
+}
+        break;
+      case 25: /* sep ::= SEMI */
+      case 26: /* sep ::= NL */ yytestcase(yyruleno==26);
+{
+  yy_destructor<std::string>(std::addressof(yymsp[0].minor.yy0));
+  yy_constructor<command_ptr>(std::addressof(yymsp[0].minor.yy17));
+}
+        break;
+      case 34: /* opt_nl ::= */
+  yy_constructor<command_ptr>(std::addressof(yymsp[1].minor.yy17));
+        break;
+      case 35: /* opt_nl ::= opt_nl NL */
+{
+  yy_destructor<command_ptr>(std::addressof(yymsp[-1].minor.yy17));
+  yy_destructor<std::string>(std::addressof(yymsp[0].minor.yy0));
+  yy_constructor<command_ptr>(std::addressof(yymsp[-1].minor.yy17));
+}
+        break;
+      default:
+      /* (27) command ::= term (OPTIMIZED OUT) */ assert(yyruleno!=27);
+      /* (28) term ::= if_command (OPTIMIZED OUT) */ assert(yyruleno!=28);
+      /* (29) term ::= begin_command (OPTIMIZED OUT) */ assert(yyruleno!=29);
+      /* (30) term ::= paren_command (OPTIMIZED OUT) */ assert(yyruleno!=30);
+      /* (31) term ::= loop_command (OPTIMIZED OUT) */ assert(yyruleno!=31);
+      /* (32) term ::= for_command (OPTIMIZED OUT) */ assert(yyruleno!=32);
+      /* (33) paren_list ::= compound_list */ yytestcase(yyruleno==33);
+        break;
+/********** End reduce actions ************************************************/
+  };
+  assert( yyruleno<sizeof(yyRuleInfo)/sizeof(yyRuleInfo[0]) );
+  yygoto = yyRuleInfo[yyruleno].lhs;
+  yysize = yyRuleInfo[yyruleno].nrhs;
+  yyact = yy_find_reduce_action(yymsp[yysize].stateno,(YYCODETYPE)yygoto);
+
+  /* There are no SHIFTREDUCE actions on nonterminals because the table
+  ** generator has simplified them to pure REDUCE actions. */
+  assert( !(yyact>YY_MAX_SHIFT && yyact<=YY_MAX_SHIFTREDUCE) );
+
+  /* It is not possible for a REDUCE to be followed by an error */
+  assert( yyact!=YY_ERROR_ACTION );
+
+  if( yyact==YY_ACCEPT_ACTION ){
+    yytos += yysize;
+    yy_accept();
+  }else{
+    yymsp += yysize+1;
+    yytos = yymsp;
+    yymsp->stateno = (YYACTIONTYPE)yyact;
+    yymsp->major = (YYCODETYPE)yygoto;
+    yyTraceShift(yyact);
+  }
+}
+
+/*
+** The following code executes when the parse fails
+*/
+#ifndef YYNOERRORRECOVERY
+void yypParser::yy_parse_failed(){
+#ifndef NDEBUG
+  if( yyTraceFILE ){
+    fprintf(yyTraceFILE,"%sFail!\n",yyTracePrompt);
+  }
+#endif
+  while( yytos>yystack ) yy_pop_parser_stack();
+  /* Here code is inserted which will be executed whenever the
+  ** parser fails */
+/************ Begin %parse_failure code ***************************************/
+/************ End %parse_failure code *****************************************/
+  LEMON_SUPER::parse_failure();
+}
+#endif /* YYNOERRORRECOVERY */
+
+/*
+** The following code executes when a syntax error first occurs.
+*/
+void yypParser::yy_syntax_error(
+  int yymajor,                   /* The major type of the error token */
+  ParseTOKENTYPE &yyminor        /* The minor type of the error token */
+){
+//#define TOKEN yyminor
+  auto &TOKEN = yyminor;
+/************ Begin %syntax_error code ****************************************/
+/************ End %syntax_error code ******************************************/
+  LEMON_SUPER::syntax_error(yymajor, TOKEN);
+}
+
+/*
+** The following is executed when the parser accepts
+*/
+void yypParser::yy_accept(){
+#ifndef NDEBUG
+  if( yyTraceFILE ){
+    fprintf(yyTraceFILE,"%sAccept!\n",yyTracePrompt);
+  }
+#endif
+#ifndef YYNOERRORRECOVERY
+  yyerrcnt = -1;
+#endif
+  assert( yytos==yystack );
+  /* Here code is inserted which will be executed whenever the
+  ** parser accepts */
+/*********** Begin %parse_accept code *****************************************/
+/*********** End %parse_accept code *******************************************/
+  LEMON_SUPER::parse_accept();
+}
+
+/* The main parser program.
+** The first argument is a pointer to a structure obtained from
+** "ParseAlloc" which describes the current state of the parser.
+** The second argument is the major token number.  The third is
+** the minor token.  The fourth optional argument is whatever the
+** user wants (and specified in the grammar) and is available for
+** use by the action routines.
+**
+** Inputs:
+** <ul>
+** <li> A pointer to the parser (an opaque structure.)
+** <li> The major token number.
+** <li> The minor token number.
+** <li> An option argument of a grammar-specified type.
+** </ul>
+**
+** Outputs:
+** None.
+*/
+
+
+
+void yypParser::parse(
+  int yymajor,                 /* The major token code number */
+  ParseTOKENTYPE &&yyminor       /* The value for the token */
+){
+  //YYMINORTYPE yyminorunion;
+  unsigned int yyact;            /* The parser action. */
+#if !defined(YYERRORSYMBOL) && !defined(YYNOERRORRECOVERY)
+  int yyendofinput;     /* True if we are at the end of input */
+#endif
+#ifdef YYERRORSYMBOL
+  int yyerrorhit = 0;   /* True if yymajor has invoked an error */
+#endif
+
+  assert( yytos!=0 );
+
+#if !defined(YYERRORSYMBOL) && !defined(YYNOERRORRECOVERY)
+  yyendofinput = (yymajor==0);
+#endif
+
+#ifndef NDEBUG
+  if( yyTraceFILE ){
+    fprintf(yyTraceFILE,"%sInput '%s'\n",yyTracePrompt,yyTokenName[yymajor]);
+  }
+#endif
+
+  do{
+    yyact = yy_find_shift_action(yytos->stateno, (YYCODETYPE)yymajor);
+    if( yyact <= YY_MAX_SHIFTREDUCE ){
+      yy_shift(yyact,yymajor,std::move(yyminor));
+#ifndef YYNOERRORRECOVERY
+      yyerrcnt--;
+#endif
+      yymajor = YYNOCODE;
+    }else if( yyact <= YY_MAX_REDUCE ){
+      yy_reduce(yyact-YY_MIN_REDUCE);
+    }else{
+      assert( yyact == YY_ERROR_ACTION );
+#ifdef YYERRORSYMBOL
+      int yymx;
+#endif
+#ifndef NDEBUG
+      if( yyTraceFILE ){
+        fprintf(yyTraceFILE,"%sSyntax Error!\n",yyTracePrompt);
+      }
+#endif
+#ifdef YYERRORSYMBOL
+      /* A syntax error has occurred.
+      ** The response to an error depends upon whether or not the
+      ** grammar defines an error token "ERROR".  
+      **
+      ** This is what we do if the grammar does define ERROR:
+      **
+      **  * Call the %syntax_error function.
+      **
+      **  * Begin popping the stack until we enter a state where
+      **    it is legal to shift the error symbol, then shift
+      **    the error symbol.
+      **
+      **  * Set the error count to three.
+      **
+      **  * Begin accepting and shifting new tokens.  No new error
+      **    processing will occur until three tokens have been
+      **    shifted successfully.
+      **
+      */
+      if( yyerrcnt<0 ){
+        yy_syntax_error(yymajor,yyminor);
+      }
+      yymx = yytos->major;
+      if( yymx==YYERRORSYMBOL || yyerrorhit ){
+#ifndef NDEBUG
+        if( yyTraceFILE ){
+          fprintf(yyTraceFILE,"%sDiscard input token %s\n",
+             yyTracePrompt,yyTokenName[yymajor]);
+        }
+#endif
+        //yy_destructor(yyminor);
+        yymajor = YYNOCODE;
+      }else{
+        while( yytos >= yystack
+            && yymx != YYERRORSYMBOL
+            && (yyact = yy_find_reduce_action(
+                        yytos->stateno,
+                        YYERRORSYMBOL)) >= YY_MIN_REDUCE
+        ){
+          yy_pop_parser_stack();
+        }
+        if( yytos < yystack || yymajor==0 ){
+          //yy_destructor(yyminor);
+          yy_parse_failed();
+#ifndef YYNOERRORRECOVERY
+          yyerrcnt = -1;
+#endif
+          yymajor = YYNOCODE;
+        }else if( yymx!=YYERRORSYMBOL ){
+          yy_shift(yyact,YYERRORSYMBOL,std::move(yyminor));
+        }
+      }
+      yyerrcnt = 3;
+      yyerrorhit = 1;
+#elif defined(YYNOERRORRECOVERY)
+      /* If the YYNOERRORRECOVERY macro is defined, then do not attempt to
+      ** do any kind of error recovery.  Instead, simply invoke the syntax
+      ** error routine and continue going as if nothing had happened.
+      **
+      ** Applications can set this macro (for example inside %include) if
+      ** they intend to abandon the parse upon the first syntax error seen.
+      */
+      yy_syntax_error(yymajor,yyminor);
+      //yy_destructor(yyminor);
+      yymajor = YYNOCODE;
+      
+#else  /* YYERRORSYMBOL is not defined */
+      /* This is what we do if the grammar does not define ERROR:
+      **
+      **  * Report an error message, and throw away the input token.
+      **
+      **  * If the input token is $, then fail the parse.
+      **
+      ** As before, subsequent error messages are suppressed until
+      ** three input tokens have been successfully shifted.
+      */
+      if( yyerrcnt<=0 ){
+        yy_syntax_error(yymajor,yyminor);
+      }
+      yyerrcnt = 3;
+      //yy_destructor(yyminor);
+      if( yyendofinput ){
+        yy_parse_failed();
+#ifndef YYNOERRORRECOVERY
+        yyerrcnt = -1;
+#endif
+      }
+      yymajor = YYNOCODE;
+#endif
+    }
+  }while( yymajor!=YYNOCODE && yytos>yystack );
+#ifndef NDEBUG
+  if( yyTraceFILE ){
+    yyStackEntry *i;
+    char cDiv = '[';
+    fprintf(yyTraceFILE,"%sReturn. Stack=",yyTracePrompt);
+    for(i=&yystack[1]; i<=yytos; i++){
+      fprintf(yyTraceFILE,"%c%s", cDiv, yyTokenName[i->major]);
+      cDiv = ' ';
+    }
+    if (cDiv == '[') fprintf(yyTraceFILE,"[");
+    fprintf(yyTraceFILE,"]\n");
+  }
+#endif
+  return;
+}
+
+
+bool yypParser::will_accept() const {
+
+
+  struct stack_entry {
+    int stateno;
+    int major;
+  };
+
+  int yyact;
+  const int yymajor = 0;
+  std::vector<stack_entry> stack;
+
+
+  // copy stack to stack.
+  stack.reserve(yyidx()+1);
+  std::transform(begin(), end(), std::back_inserter(stack), [](const yyStackEntry &e){
+    return stack_entry({e.stateno, e.major});
+  });
+
+  do {
+    yyact = yy_find_shift_action(stack.back().stateno, yymajor);
+    if (yyact <= YY_MAX_SHIFTREDUCE) {
+      // shift
+      return false;
+      //stack.push_back({yyact, yymajor});
+      //yymajor = YYNOCODE;
+    }
+    else if (yyact <= YY_MAX_REDUCE) {
+      // reduce...
+      unsigned yyruleno = yyact - YY_MIN_REDUCE;
+
+      int yygoto = yyRuleInfo[yyruleno].lhs;
+      int yysize = -yyRuleInfo[yyruleno].nrhs; /* stored as negative value */
+
+      while (yysize--) stack.pop_back();
+
+      yyact = yy_find_reduce_action(stack.back().stateno,(YYCODETYPE)yygoto);
+
+
+      if (yyact == YY_ACCEPT_ACTION) return true;
+
+      if( yyact>YY_MAX_SHIFT ){
+        yyact += YY_MIN_REDUCE - YY_MIN_SHIFTREDUCE;
+      }
+
+      stack.push_back({yyact, yygoto});
+    }
+    else {
+      return false;
+    }
+
+  } while (!stack.empty());
+
+  return false;
+
+
+}
+
+
+
+
+} // namespace
+#line 15 "phase3.lemon"
+
+	
+std::unique_ptr<phase3> phase3::make() {
+	return std::make_unique<yypParser>();
+}
+
+bool phase3::continuation() const {
+	yypParser *self = (yypParser *)this;
+
+	for (const auto &e : *self) {
+		if (e.major == BEGIN) return true;
+		if (e.major == LPAREN) return true;
+		if (e.major == IF) return true;
+		if (e.major == AMP_AMP) return true;
+		if (e.major == PIPE_PIPE) return true;
+		if (e.major == LOOP) return true;
+		if (e.major == FOR) return true;
+		if (e.major == PIPE) return true;
+		if (e.major == PIPE_PIPE) return true;
+		if (e.major == AMP_AMP) return true;
+	}
+	return false;
+}
+
+
+void phase3::parse_accept() {
+	error = false;
+}
+
+void phase3::parse_failure() {
+	error = false;
+}
+
+void phase3::syntax_error(int yymajor, std::string &yyminor) {
+/*
+	switch (yymajor) {
+	case END:
+		fprintf(stderr, "### MPW Shell - Extra END command.\n");
+		break;
+
+	case RPAREN:
+		fprintf(stderr, "### MPW Shell - Extra ) command.\n");
+		break;
+
+	case ELSE:
+	case ELSE_IF:
+		fprintf(stderr, "### MPW Shell - ELSE must be within IF ... END.\n");
+		break;
+
+	default:
+		fprintf(stderr, "### Parse error near %s\n", yyminor.c_str());
+		break;
+	}
+*/
+
+	
+	fprintf(stderr, "### MPW Shell - Parse error near %s\n", yymajor ? yyminor.c_str() : "EOF");
+	error = true;
+}
+
+
+#line 1863 "phase3.cpp"
diff --git a/phase3.h b/phase3.h
new file mode 100644
index 0000000..372f54a
--- /dev/null
+++ b/phase3.h
@@ -0,0 +1,20 @@
+#define PIPE_PIPE                        1
+#define AMP_AMP                          2
+#define PIPE                             3
+#define SEMI                             4
+#define NL                               5
+#define COMMAND                          6
+#define EVALUATE                         7
+#define BREAK                            8
+#define CONTINUE                         9
+#define EXIT                            10
+#define ERROR                           11
+#define LPAREN                          12
+#define RPAREN                          13
+#define BEGIN                           14
+#define END                             15
+#define LOOP                            16
+#define FOR                             17
+#define IF                              18
+#define ELSE_IF                         19
+#define ELSE                            20
diff --git a/phase3.out b/phase3.out
new file mode 100644
index 0000000..049f778
--- /dev/null
+++ b/phase3.out
@@ -0,0 +1,822 @@
+State 0:
+          start ::= * command_list
+     (21) command_list ::= *
+          command_list ::= * command_list sep
+          command_list ::= * command_list command sep
+
+                         start accept
+                  command_list shift        5      
+                     {default} reduce       21     command_list ::=
+
+State 1:
+          compound_list ::= compound_list * sep
+          compound_list ::= compound_list * command sep
+          sep ::= * SEMI
+          sep ::= * NL
+          command ::= * command PIPE_PIPE opt_nl command
+          command ::= * command AMP_AMP opt_nl command
+          command ::= * command PIPE opt_nl command
+          command ::= * term
+          term ::= * COMMAND
+          term ::= * EVALUATE
+          term ::= * BREAK
+          term ::= * CONTINUE
+          term ::= * EXIT
+          term ::= * if_command
+          term ::= * begin_command
+          term ::= * paren_command
+          term ::= * loop_command
+          term ::= * for_command
+          term ::= * ERROR
+          paren_command ::= * LPAREN paren_list RPAREN
+          begin_command ::= * BEGIN sep compound_list END
+          loop_command ::= * LOOP sep compound_list END
+          for_command ::= * FOR sep compound_list END
+          if_command ::= * IF sep compound_list END
+          if_command ::= IF sep compound_list * END
+          if_command ::= * IF sep compound_list else_command END
+          if_command ::= IF sep compound_list * else_command END
+          else_command ::= * ELSE_IF|ELSE sep compound_list
+          else_command ::= * else_command ELSE_IF|ELSE sep compound_list
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                       COMMAND shift-reduce 5      term ::= COMMAND
+                      EVALUATE shift-reduce 6      term ::= EVALUATE
+                         BREAK shift-reduce 7      term ::= BREAK
+                      CONTINUE shift-reduce 8      term ::= CONTINUE
+                          EXIT shift-reduce 9      term ::= EXIT
+                         ERROR shift-reduce 10     term ::= ERROR
+                        LPAREN shift        12     
+                         BEGIN shift        21     
+                           END shift-reduce 16     if_command ::= IF sep compound_list END
+                          LOOP shift        20     
+                           FOR shift        19     
+                            IF shift        18     
+                       ELSE_IF shift        16     
+                          ELSE shift        16     
+                           sep shift-reduce 24     compound_list ::= compound_list sep
+                       command shift        13     
+                          term shift        13       /* because term==command */
+                    if_command shift        13       /* because if_command==term */
+                 begin_command shift        13       /* because begin_command==term */
+                 paren_command shift        13       /* because paren_command==term */
+                  loop_command shift        13       /* because loop_command==term */
+                   for_command shift        13       /* because for_command==term */
+                  else_command shift        31     
+
+State 2:
+          compound_list ::= compound_list * sep
+          compound_list ::= compound_list * command sep
+          sep ::= * SEMI
+          sep ::= * NL
+          command ::= * command PIPE_PIPE opt_nl command
+          command ::= * command AMP_AMP opt_nl command
+          command ::= * command PIPE opt_nl command
+          command ::= * term
+          term ::= * COMMAND
+          term ::= * EVALUATE
+          term ::= * BREAK
+          term ::= * CONTINUE
+          term ::= * EXIT
+          term ::= * if_command
+          term ::= * begin_command
+          term ::= * paren_command
+          term ::= * loop_command
+          term ::= * for_command
+          term ::= * ERROR
+          paren_command ::= * LPAREN paren_list RPAREN
+          begin_command ::= * BEGIN sep compound_list END
+          loop_command ::= * LOOP sep compound_list END
+          for_command ::= * FOR sep compound_list END
+          for_command ::= FOR sep compound_list * END
+          if_command ::= * IF sep compound_list END
+          if_command ::= * IF sep compound_list else_command END
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                       COMMAND shift-reduce 5      term ::= COMMAND
+                      EVALUATE shift-reduce 6      term ::= EVALUATE
+                         BREAK shift-reduce 7      term ::= BREAK
+                      CONTINUE shift-reduce 8      term ::= CONTINUE
+                          EXIT shift-reduce 9      term ::= EXIT
+                         ERROR shift-reduce 10     term ::= ERROR
+                        LPAREN shift        12     
+                         BEGIN shift        21     
+                           END shift-reduce 15     for_command ::= FOR sep compound_list END
+                          LOOP shift        20     
+                           FOR shift        19     
+                            IF shift        18     
+                           sep shift-reduce 24     compound_list ::= compound_list sep
+                       command shift        13     
+                          term shift        13       /* because term==command */
+                    if_command shift        13       /* because if_command==term */
+                 begin_command shift        13       /* because begin_command==term */
+                 paren_command shift        13       /* because paren_command==term */
+                  loop_command shift        13       /* because loop_command==term */
+                   for_command shift        13       /* because for_command==term */
+
+State 3:
+          compound_list ::= compound_list * sep
+          compound_list ::= compound_list * command sep
+          sep ::= * SEMI
+          sep ::= * NL
+          command ::= * command PIPE_PIPE opt_nl command
+          command ::= * command AMP_AMP opt_nl command
+          command ::= * command PIPE opt_nl command
+          command ::= * term
+          term ::= * COMMAND
+          term ::= * EVALUATE
+          term ::= * BREAK
+          term ::= * CONTINUE
+          term ::= * EXIT
+          term ::= * if_command
+          term ::= * begin_command
+          term ::= * paren_command
+          term ::= * loop_command
+          term ::= * for_command
+          term ::= * ERROR
+          paren_command ::= * LPAREN paren_list RPAREN
+          begin_command ::= * BEGIN sep compound_list END
+          loop_command ::= * LOOP sep compound_list END
+          loop_command ::= LOOP sep compound_list * END
+          for_command ::= * FOR sep compound_list END
+          if_command ::= * IF sep compound_list END
+          if_command ::= * IF sep compound_list else_command END
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                       COMMAND shift-reduce 5      term ::= COMMAND
+                      EVALUATE shift-reduce 6      term ::= EVALUATE
+                         BREAK shift-reduce 7      term ::= BREAK
+                      CONTINUE shift-reduce 8      term ::= CONTINUE
+                          EXIT shift-reduce 9      term ::= EXIT
+                         ERROR shift-reduce 10     term ::= ERROR
+                        LPAREN shift        12     
+                         BEGIN shift        21     
+                           END shift-reduce 14     loop_command ::= LOOP sep compound_list END
+                          LOOP shift        20     
+                           FOR shift        19     
+                            IF shift        18     
+                           sep shift-reduce 24     compound_list ::= compound_list sep
+                       command shift        13     
+                          term shift        13       /* because term==command */
+                    if_command shift        13       /* because if_command==term */
+                 begin_command shift        13       /* because begin_command==term */
+                 paren_command shift        13       /* because paren_command==term */
+                  loop_command shift        13       /* because loop_command==term */
+                   for_command shift        13       /* because for_command==term */
+
+State 4:
+          compound_list ::= compound_list * sep
+          compound_list ::= compound_list * command sep
+          sep ::= * SEMI
+          sep ::= * NL
+          command ::= * command PIPE_PIPE opt_nl command
+          command ::= * command AMP_AMP opt_nl command
+          command ::= * command PIPE opt_nl command
+          command ::= * term
+          term ::= * COMMAND
+          term ::= * EVALUATE
+          term ::= * BREAK
+          term ::= * CONTINUE
+          term ::= * EXIT
+          term ::= * if_command
+          term ::= * begin_command
+          term ::= * paren_command
+          term ::= * loop_command
+          term ::= * for_command
+          term ::= * ERROR
+          paren_command ::= * LPAREN paren_list RPAREN
+          begin_command ::= * BEGIN sep compound_list END
+          begin_command ::= BEGIN sep compound_list * END
+          loop_command ::= * LOOP sep compound_list END
+          for_command ::= * FOR sep compound_list END
+          if_command ::= * IF sep compound_list END
+          if_command ::= * IF sep compound_list else_command END
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                       COMMAND shift-reduce 5      term ::= COMMAND
+                      EVALUATE shift-reduce 6      term ::= EVALUATE
+                         BREAK shift-reduce 7      term ::= BREAK
+                      CONTINUE shift-reduce 8      term ::= CONTINUE
+                          EXIT shift-reduce 9      term ::= EXIT
+                         ERROR shift-reduce 10     term ::= ERROR
+                        LPAREN shift        12     
+                         BEGIN shift        21     
+                           END shift-reduce 13     begin_command ::= BEGIN sep compound_list END
+                          LOOP shift        20     
+                           FOR shift        19     
+                            IF shift        18     
+                           sep shift-reduce 24     compound_list ::= compound_list sep
+                       command shift        13     
+                          term shift        13       /* because term==command */
+                    if_command shift        13       /* because if_command==term */
+                 begin_command shift        13       /* because begin_command==term */
+                 paren_command shift        13       /* because paren_command==term */
+                  loop_command shift        13       /* because loop_command==term */
+                   for_command shift        13       /* because for_command==term */
+
+State 5:
+     (20) start ::= command_list *
+          command_list ::= command_list * sep
+          command_list ::= command_list * command sep
+          sep ::= * SEMI
+          sep ::= * NL
+          command ::= * command PIPE_PIPE opt_nl command
+          command ::= * command AMP_AMP opt_nl command
+          command ::= * command PIPE opt_nl command
+          command ::= * term
+          term ::= * COMMAND
+          term ::= * EVALUATE
+          term ::= * BREAK
+          term ::= * CONTINUE
+          term ::= * EXIT
+          term ::= * if_command
+          term ::= * begin_command
+          term ::= * paren_command
+          term ::= * loop_command
+          term ::= * for_command
+          term ::= * ERROR
+          paren_command ::= * LPAREN paren_list RPAREN
+          begin_command ::= * BEGIN sep compound_list END
+          loop_command ::= * LOOP sep compound_list END
+          for_command ::= * FOR sep compound_list END
+          if_command ::= * IF sep compound_list END
+          if_command ::= * IF sep compound_list else_command END
+
+                             $ reduce       20     start ::= command_list
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                       COMMAND shift-reduce 5      term ::= COMMAND
+                      EVALUATE shift-reduce 6      term ::= EVALUATE
+                         BREAK shift-reduce 7      term ::= BREAK
+                      CONTINUE shift-reduce 8      term ::= CONTINUE
+                          EXIT shift-reduce 9      term ::= EXIT
+                         ERROR shift-reduce 10     term ::= ERROR
+                        LPAREN shift        12     
+                         BEGIN shift        21     
+                          LOOP shift        20     
+                           FOR shift        19     
+                            IF shift        18     
+                           sep shift-reduce 22     command_list ::= command_list sep
+                       command shift        15     
+                          term shift        15       /* because term==command */
+                    if_command shift        15       /* because if_command==term */
+                 begin_command shift        15       /* because begin_command==term */
+                 paren_command shift        15       /* because paren_command==term */
+                  loop_command shift        15       /* because loop_command==term */
+                   for_command shift        15       /* because for_command==term */
+
+State 6:
+          compound_list ::= compound_list * sep
+          compound_list ::= compound_list * command sep
+          sep ::= * SEMI
+          sep ::= * NL
+          command ::= * command PIPE_PIPE opt_nl command
+          command ::= * command AMP_AMP opt_nl command
+          command ::= * command PIPE opt_nl command
+          command ::= * term
+          term ::= * COMMAND
+          term ::= * EVALUATE
+          term ::= * BREAK
+          term ::= * CONTINUE
+          term ::= * EXIT
+          term ::= * if_command
+          term ::= * begin_command
+          term ::= * paren_command
+          term ::= * loop_command
+          term ::= * for_command
+          term ::= * ERROR
+          paren_command ::= * LPAREN paren_list RPAREN
+          begin_command ::= * BEGIN sep compound_list END
+          loop_command ::= * LOOP sep compound_list END
+          for_command ::= * FOR sep compound_list END
+          if_command ::= * IF sep compound_list END
+          if_command ::= * IF sep compound_list else_command END
+     (18) else_command ::= ELSE_IF|ELSE sep compound_list *
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                       COMMAND shift-reduce 5      term ::= COMMAND
+                      EVALUATE shift-reduce 6      term ::= EVALUATE
+                         BREAK shift-reduce 7      term ::= BREAK
+                      CONTINUE shift-reduce 8      term ::= CONTINUE
+                          EXIT shift-reduce 9      term ::= EXIT
+                         ERROR shift-reduce 10     term ::= ERROR
+                        LPAREN shift        12     
+                         BEGIN shift        21     
+                          LOOP shift        20     
+                           FOR shift        19     
+                            IF shift        18     
+                           sep shift-reduce 24     compound_list ::= compound_list sep
+                       command shift        13     
+                          term shift        13       /* because term==command */
+                    if_command shift        13       /* because if_command==term */
+                 begin_command shift        13       /* because begin_command==term */
+                 paren_command shift        13       /* because paren_command==term */
+                  loop_command shift        13       /* because loop_command==term */
+                   for_command shift        13       /* because for_command==term */
+                     {default} reduce       18     else_command ::= ELSE_IF|ELSE sep compound_list
+
+State 7:
+          compound_list ::= compound_list * sep
+          compound_list ::= compound_list * command sep
+          sep ::= * SEMI
+          sep ::= * NL
+          command ::= * command PIPE_PIPE opt_nl command
+          command ::= * command AMP_AMP opt_nl command
+          command ::= * command PIPE opt_nl command
+          command ::= * term
+          term ::= * COMMAND
+          term ::= * EVALUATE
+          term ::= * BREAK
+          term ::= * CONTINUE
+          term ::= * EXIT
+          term ::= * if_command
+          term ::= * begin_command
+          term ::= * paren_command
+          term ::= * loop_command
+          term ::= * for_command
+          term ::= * ERROR
+          paren_command ::= * LPAREN paren_list RPAREN
+          begin_command ::= * BEGIN sep compound_list END
+          loop_command ::= * LOOP sep compound_list END
+          for_command ::= * FOR sep compound_list END
+          if_command ::= * IF sep compound_list END
+          if_command ::= * IF sep compound_list else_command END
+     (19) else_command ::= else_command ELSE_IF|ELSE sep compound_list *
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                       COMMAND shift-reduce 5      term ::= COMMAND
+                      EVALUATE shift-reduce 6      term ::= EVALUATE
+                         BREAK shift-reduce 7      term ::= BREAK
+                      CONTINUE shift-reduce 8      term ::= CONTINUE
+                          EXIT shift-reduce 9      term ::= EXIT
+                         ERROR shift-reduce 10     term ::= ERROR
+                        LPAREN shift        12     
+                         BEGIN shift        21     
+                          LOOP shift        20     
+                           FOR shift        19     
+                            IF shift        18     
+                           sep shift-reduce 24     compound_list ::= compound_list sep
+                       command shift        13     
+                          term shift        13       /* because term==command */
+                    if_command shift        13       /* because if_command==term */
+                 begin_command shift        13       /* because begin_command==term */
+                 paren_command shift        13       /* because paren_command==term */
+                  loop_command shift        13       /* because loop_command==term */
+                   for_command shift        13       /* because for_command==term */
+                     {default} reduce       19     else_command ::= else_command ELSE_IF|ELSE sep compound_list
+
+State 8:
+          compound_list ::= compound_list * sep
+          compound_list ::= compound_list * command sep
+          sep ::= * SEMI
+          sep ::= * NL
+          command ::= * command PIPE_PIPE opt_nl command
+          command ::= * command AMP_AMP opt_nl command
+          command ::= * command PIPE opt_nl command
+          command ::= * term
+          term ::= * COMMAND
+          term ::= * EVALUATE
+          term ::= * BREAK
+          term ::= * CONTINUE
+          term ::= * EXIT
+          term ::= * if_command
+          term ::= * begin_command
+          term ::= * paren_command
+          term ::= * loop_command
+          term ::= * for_command
+          term ::= * ERROR
+     (33) paren_list ::= compound_list *
+          paren_list ::= compound_list * command
+          paren_command ::= * LPAREN paren_list RPAREN
+          begin_command ::= * BEGIN sep compound_list END
+          loop_command ::= * LOOP sep compound_list END
+          for_command ::= * FOR sep compound_list END
+          if_command ::= * IF sep compound_list END
+          if_command ::= * IF sep compound_list else_command END
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                       COMMAND shift-reduce 5      term ::= COMMAND
+                      EVALUATE shift-reduce 6      term ::= EVALUATE
+                         BREAK shift-reduce 7      term ::= BREAK
+                      CONTINUE shift-reduce 8      term ::= CONTINUE
+                          EXIT shift-reduce 9      term ::= EXIT
+                         ERROR shift-reduce 10     term ::= ERROR
+                        LPAREN shift        12     
+                         BEGIN shift        21     
+                          LOOP shift        20     
+                           FOR shift        19     
+                            IF shift        18     
+                           sep shift-reduce 24     compound_list ::= compound_list sep
+                       command shift        14     
+                          term shift        14       /* because term==command */
+                    if_command shift        14       /* because if_command==term */
+                 begin_command shift        14       /* because begin_command==term */
+                 paren_command shift        14       /* because paren_command==term */
+                  loop_command shift        14       /* because loop_command==term */
+                   for_command shift        14       /* because for_command==term */
+                     {default} reduce       33     paren_list ::= compound_list
+
+State 9:
+          command ::= * command PIPE_PIPE opt_nl command
+          command ::= * command AMP_AMP opt_nl command
+          command ::= * command PIPE opt_nl command
+          command ::= command PIPE opt_nl * command
+          command ::= * term
+          term ::= * COMMAND
+          term ::= * EVALUATE
+          term ::= * BREAK
+          term ::= * CONTINUE
+          term ::= * EXIT
+          term ::= * if_command
+          term ::= * begin_command
+          term ::= * paren_command
+          term ::= * loop_command
+          term ::= * for_command
+          term ::= * ERROR
+          paren_command ::= * LPAREN paren_list RPAREN
+          begin_command ::= * BEGIN sep compound_list END
+          loop_command ::= * LOOP sep compound_list END
+          for_command ::= * FOR sep compound_list END
+          if_command ::= * IF sep compound_list END
+          if_command ::= * IF sep compound_list else_command END
+          opt_nl ::= opt_nl * NL
+
+                            NL shift-reduce 35     opt_nl ::= opt_nl NL
+                       COMMAND shift-reduce 5      term ::= COMMAND
+                      EVALUATE shift-reduce 6      term ::= EVALUATE
+                         BREAK shift-reduce 7      term ::= BREAK
+                      CONTINUE shift-reduce 8      term ::= CONTINUE
+                          EXIT shift-reduce 9      term ::= EXIT
+                         ERROR shift-reduce 10     term ::= ERROR
+                        LPAREN shift        12     
+                         BEGIN shift        21     
+                          LOOP shift        20     
+                           FOR shift        19     
+                            IF shift        18     
+                       command shift-reduce 4      command ::= command PIPE opt_nl command
+                          term shift-reduce 4      command ::= command PIPE opt_nl command  /* because term==command */
+                    if_command shift-reduce 4      command ::= command PIPE opt_nl command  /* because if_command==term */
+                 begin_command shift-reduce 4      command ::= command PIPE opt_nl command  /* because begin_command==term */
+                 paren_command shift-reduce 4      command ::= command PIPE opt_nl command  /* because paren_command==term */
+                  loop_command shift-reduce 4      command ::= command PIPE opt_nl command  /* because loop_command==term */
+                   for_command shift-reduce 4      command ::= command PIPE opt_nl command  /* because for_command==term */
+
+State 10:
+          command ::= * command PIPE_PIPE opt_nl command
+          command ::= * command AMP_AMP opt_nl command
+          command ::= command AMP_AMP opt_nl * command
+          command ::= * command PIPE opt_nl command
+          command ::= * term
+          term ::= * COMMAND
+          term ::= * EVALUATE
+          term ::= * BREAK
+          term ::= * CONTINUE
+          term ::= * EXIT
+          term ::= * if_command
+          term ::= * begin_command
+          term ::= * paren_command
+          term ::= * loop_command
+          term ::= * for_command
+          term ::= * ERROR
+          paren_command ::= * LPAREN paren_list RPAREN
+          begin_command ::= * BEGIN sep compound_list END
+          loop_command ::= * LOOP sep compound_list END
+          for_command ::= * FOR sep compound_list END
+          if_command ::= * IF sep compound_list END
+          if_command ::= * IF sep compound_list else_command END
+          opt_nl ::= opt_nl * NL
+
+                            NL shift-reduce 35     opt_nl ::= opt_nl NL
+                       COMMAND shift-reduce 5      term ::= COMMAND
+                      EVALUATE shift-reduce 6      term ::= EVALUATE
+                         BREAK shift-reduce 7      term ::= BREAK
+                      CONTINUE shift-reduce 8      term ::= CONTINUE
+                          EXIT shift-reduce 9      term ::= EXIT
+                         ERROR shift-reduce 10     term ::= ERROR
+                        LPAREN shift        12     
+                         BEGIN shift        21     
+                          LOOP shift        20     
+                           FOR shift        19     
+                            IF shift        18     
+                       command shift        33     
+                          term shift        33       /* because term==command */
+                    if_command shift        33       /* because if_command==term */
+                 begin_command shift        33       /* because begin_command==term */
+                 paren_command shift        33       /* because paren_command==term */
+                  loop_command shift        33       /* because loop_command==term */
+                   for_command shift        33       /* because for_command==term */
+
+State 11:
+          command ::= * command PIPE_PIPE opt_nl command
+          command ::= command PIPE_PIPE opt_nl * command
+          command ::= * command AMP_AMP opt_nl command
+          command ::= * command PIPE opt_nl command
+          command ::= * term
+          term ::= * COMMAND
+          term ::= * EVALUATE
+          term ::= * BREAK
+          term ::= * CONTINUE
+          term ::= * EXIT
+          term ::= * if_command
+          term ::= * begin_command
+          term ::= * paren_command
+          term ::= * loop_command
+          term ::= * for_command
+          term ::= * ERROR
+          paren_command ::= * LPAREN paren_list RPAREN
+          begin_command ::= * BEGIN sep compound_list END
+          loop_command ::= * LOOP sep compound_list END
+          for_command ::= * FOR sep compound_list END
+          if_command ::= * IF sep compound_list END
+          if_command ::= * IF sep compound_list else_command END
+          opt_nl ::= opt_nl * NL
+
+                            NL shift-reduce 35     opt_nl ::= opt_nl NL
+                       COMMAND shift-reduce 5      term ::= COMMAND
+                      EVALUATE shift-reduce 6      term ::= EVALUATE
+                         BREAK shift-reduce 7      term ::= BREAK
+                      CONTINUE shift-reduce 8      term ::= CONTINUE
+                          EXIT shift-reduce 9      term ::= EXIT
+                         ERROR shift-reduce 10     term ::= ERROR
+                        LPAREN shift        12     
+                         BEGIN shift        21     
+                          LOOP shift        20     
+                           FOR shift        19     
+                            IF shift        18     
+                       command shift        34     
+                          term shift        34       /* because term==command */
+                    if_command shift        34       /* because if_command==term */
+                 begin_command shift        34       /* because begin_command==term */
+                 paren_command shift        34       /* because paren_command==term */
+                  loop_command shift        34       /* because loop_command==term */
+                   for_command shift        34       /* because for_command==term */
+
+State 12:
+     (23) compound_list ::= *
+          compound_list ::= * compound_list sep
+          compound_list ::= * compound_list command sep
+          paren_list ::= * compound_list
+          paren_list ::= * compound_list command
+          paren_command ::= LPAREN * paren_list RPAREN
+
+                 compound_list shift        8      
+                    paren_list shift        32     
+                     {default} reduce       23     compound_list ::=
+
+State 13:
+          compound_list ::= compound_list command * sep
+          sep ::= * SEMI
+          sep ::= * NL
+          command ::= command * PIPE_PIPE opt_nl command
+          command ::= command * AMP_AMP opt_nl command
+          command ::= command * PIPE opt_nl command
+
+                     PIPE_PIPE shift        30     
+                       AMP_AMP shift        29     
+                          PIPE shift        28     
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                           sep shift-reduce 1      compound_list ::= compound_list command sep
+
+State 14:
+          compound_list ::= compound_list command * sep
+          sep ::= * SEMI
+          sep ::= * NL
+          command ::= command * PIPE_PIPE opt_nl command
+          command ::= command * AMP_AMP opt_nl command
+          command ::= command * PIPE opt_nl command
+     (11) paren_list ::= compound_list command *
+
+                     PIPE_PIPE shift        30     
+                       AMP_AMP shift        29     
+                          PIPE shift        28     
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                           sep shift-reduce 1      compound_list ::= compound_list command sep
+                     {default} reduce       11     paren_list ::= compound_list command
+
+State 15:
+          command_list ::= command_list command * sep
+          sep ::= * SEMI
+          sep ::= * NL
+          command ::= command * PIPE_PIPE opt_nl command
+          command ::= command * AMP_AMP opt_nl command
+          command ::= command * PIPE opt_nl command
+
+                     PIPE_PIPE shift        30     
+                       AMP_AMP shift        29     
+                          PIPE shift        28     
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                           sep shift-reduce 0      command_list ::= command_list command sep
+
+State 16:
+          sep ::= * SEMI
+          sep ::= * NL
+          else_command ::= ELSE_IF|ELSE * sep compound_list
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                           sep shift        22     
+
+State 17:
+          sep ::= * SEMI
+          sep ::= * NL
+          else_command ::= else_command ELSE_IF|ELSE * sep compound_list
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                           sep shift        23     
+
+State 18:
+          sep ::= * SEMI
+          sep ::= * NL
+          if_command ::= IF * sep compound_list END
+          if_command ::= IF * sep compound_list else_command END
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                           sep shift        24     
+
+State 19:
+          sep ::= * SEMI
+          sep ::= * NL
+          for_command ::= FOR * sep compound_list END
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                           sep shift        25     
+
+State 20:
+          sep ::= * SEMI
+          sep ::= * NL
+          loop_command ::= LOOP * sep compound_list END
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                           sep shift        26     
+
+State 21:
+          sep ::= * SEMI
+          sep ::= * NL
+          begin_command ::= BEGIN * sep compound_list END
+
+                          SEMI shift-reduce 25     sep ::= SEMI
+                            NL shift-reduce 26     sep ::= NL
+                           sep shift        27     
+
+State 22:
+     (23) compound_list ::= *
+          compound_list ::= * compound_list sep
+          compound_list ::= * compound_list command sep
+          else_command ::= ELSE_IF|ELSE sep * compound_list
+
+                 compound_list shift        6      
+                     {default} reduce       23     compound_list ::=
+
+State 23:
+     (23) compound_list ::= *
+          compound_list ::= * compound_list sep
+          compound_list ::= * compound_list command sep
+          else_command ::= else_command ELSE_IF|ELSE sep * compound_list
+
+                 compound_list shift        7      
+                     {default} reduce       23     compound_list ::=
+
+State 24:
+     (23) compound_list ::= *
+          compound_list ::= * compound_list sep
+          compound_list ::= * compound_list command sep
+          if_command ::= IF sep * compound_list END
+          if_command ::= IF sep * compound_list else_command END
+
+                 compound_list shift        1      
+                     {default} reduce       23     compound_list ::=
+
+State 25:
+     (23) compound_list ::= *
+          compound_list ::= * compound_list sep
+          compound_list ::= * compound_list command sep
+          for_command ::= FOR sep * compound_list END
+
+                 compound_list shift        2      
+                     {default} reduce       23     compound_list ::=
+
+State 26:
+     (23) compound_list ::= *
+          compound_list ::= * compound_list sep
+          compound_list ::= * compound_list command sep
+          loop_command ::= LOOP sep * compound_list END
+
+                 compound_list shift        3      
+                     {default} reduce       23     compound_list ::=
+
+State 27:
+     (23) compound_list ::= *
+          compound_list ::= * compound_list sep
+          compound_list ::= * compound_list command sep
+          begin_command ::= BEGIN sep * compound_list END
+
+                 compound_list shift        4      
+                     {default} reduce       23     compound_list ::=
+
+State 28:
+          command ::= command PIPE * opt_nl command
+     (34) opt_nl ::= *
+          opt_nl ::= * opt_nl NL
+
+                        opt_nl shift        9      
+                     {default} reduce       34     opt_nl ::=
+
+State 29:
+          command ::= command AMP_AMP * opt_nl command
+     (34) opt_nl ::= *
+          opt_nl ::= * opt_nl NL
+
+                        opt_nl shift        10     
+                     {default} reduce       34     opt_nl ::=
+
+State 30:
+          command ::= command PIPE_PIPE * opt_nl command
+     (34) opt_nl ::= *
+          opt_nl ::= * opt_nl NL
+
+                        opt_nl shift        11     
+                     {default} reduce       34     opt_nl ::=
+
+State 31:
+          if_command ::= IF sep compound_list else_command * END
+          else_command ::= else_command * ELSE_IF|ELSE sep compound_list
+
+                           END shift-reduce 17     if_command ::= IF sep compound_list else_command END
+                       ELSE_IF shift        17     
+                          ELSE shift        17     
+
+State 32:
+          paren_command ::= LPAREN paren_list * RPAREN
+
+                        RPAREN shift-reduce 12     paren_command ::= LPAREN paren_list RPAREN
+
+State 33:
+          command ::= command * PIPE_PIPE opt_nl command
+          command ::= command * AMP_AMP opt_nl command
+      (3) command ::= command AMP_AMP opt_nl command *
+          command ::= command * PIPE opt_nl command
+
+                          PIPE shift        28     
+                     {default} reduce       3      command ::= command AMP_AMP opt_nl command
+
+State 34:
+          command ::= command * PIPE_PIPE opt_nl command
+      (2) command ::= command PIPE_PIPE opt_nl command *
+          command ::= command * AMP_AMP opt_nl command
+          command ::= command * PIPE opt_nl command
+
+                          PIPE shift        28     
+                     {default} reduce       2      command ::= command PIPE_PIPE opt_nl command
+
+----------------------------------------------------
+Symbols:
+    0: $:
+    1: PIPE_PIPE
+    2: AMP_AMP
+    3: PIPE
+    4: SEMI
+    5: NL
+    6: COMMAND
+    7: EVALUATE
+    8: BREAK
+    9: CONTINUE
+   10: EXIT
+   11: ERROR
+   12: LPAREN
+   13: RPAREN
+   14: BEGIN
+   15: END
+   16: LOOP
+   17: FOR
+   18: IF
+   19: ELSE_IF
+   20: ELSE
+   21: error:
+   22: start: <lambda> SEMI NL COMMAND EVALUATE BREAK CONTINUE EXIT ERROR LPAREN BEGIN LOOP FOR IF
+   23: command_list: <lambda> SEMI NL COMMAND EVALUATE BREAK CONTINUE EXIT ERROR LPAREN BEGIN LOOP FOR IF
+   24: sep: SEMI NL
+   25: command: COMMAND EVALUATE BREAK CONTINUE EXIT ERROR LPAREN BEGIN LOOP FOR IF
+   26: compound_list: <lambda> SEMI NL COMMAND EVALUATE BREAK CONTINUE EXIT ERROR LPAREN BEGIN LOOP FOR IF
+   27: opt_nl: <lambda> NL
+   28: term: COMMAND EVALUATE BREAK CONTINUE EXIT ERROR LPAREN BEGIN LOOP FOR IF
+   29: if_command: IF
+   30: begin_command: BEGIN
+   31: paren_command: LPAREN
+   32: loop_command: LOOP
+   33: for_command: FOR
+   34: paren_list: <lambda> SEMI NL COMMAND EVALUATE BREAK CONTINUE EXIT ERROR LPAREN BEGIN LOOP FOR IF
+   35: else_command: ELSE_IF ELSE