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diff --git a/src/external/lua-5.2.3/src/lparser.h b/src/external/lua-5.2.3/src/lparser.h
new file mode 100644
index 0000000..0346e3c
--- /dev/null
+++ b/src/external/lua-5.2.3/src/lparser.h
@@ -0,0 +1,119 @@
+/*
+** $Id: lparser.h,v 1.70.1.1 2013/04/12 18:48:47 roberto Exp $
+** Lua Parser
+** See Copyright Notice in lua.h
+*/
+
+#ifndef lparser_h
+#define lparser_h
+
+#include "llimits.h"
+#include "lobject.h"
+#include "lzio.h"
+
+
+/*
+** Expression descriptor
+*/
+
+typedef enum {
+  VVOID,	/* no value */
+  VNIL,
+  VTRUE,
+  VFALSE,
+  VK,		/* info = index of constant in `k' */
+  VKNUM,	/* nval = numerical value */
+  VNONRELOC,	/* info = result register */
+  VLOCAL,	/* info = local register */
+  VUPVAL,       /* info = index of upvalue in 'upvalues' */
+  VINDEXED,	/* t = table register/upvalue; idx = index R/K */
+  VJMP,		/* info = instruction pc */
+  VRELOCABLE,	/* info = instruction pc */
+  VCALL,	/* info = instruction pc */
+  VVARARG	/* info = instruction pc */
+} expkind;
+
+
+#define vkisvar(k)	(VLOCAL <= (k) && (k) <= VINDEXED)
+#define vkisinreg(k)	((k) == VNONRELOC || (k) == VLOCAL)
+
+typedef struct expdesc {
+  expkind k;
+  union {
+    struct {  /* for indexed variables (VINDEXED) */
+      short idx;  /* index (R/K) */
+      lu_byte t;  /* table (register or upvalue) */
+      lu_byte vt;  /* whether 't' is register (VLOCAL) or upvalue (VUPVAL) */
+    } ind;
+    int info;  /* for generic use */
+    lua_Number nval;  /* for VKNUM */
+  } u;
+  int t;  /* patch list of `exit when true' */
+  int f;  /* patch list of `exit when false' */
+} expdesc;
+
+
+/* description of active local variable */
+typedef struct Vardesc {
+  short idx;  /* variable index in stack */
+} Vardesc;
+
+
+/* description of pending goto statements and label statements */
+typedef struct Labeldesc {
+  TString *name;  /* label identifier */
+  int pc;  /* position in code */
+  int line;  /* line where it appeared */
+  lu_byte nactvar;  /* local level where it appears in current block */
+} Labeldesc;
+
+
+/* list of labels or gotos */
+typedef struct Labellist {
+  Labeldesc *arr;  /* array */
+  int n;  /* number of entries in use */
+  int size;  /* array size */
+} Labellist;
+
+
+/* dynamic structures used by the parser */
+typedef struct Dyndata {
+  struct {  /* list of active local variables */
+    Vardesc *arr;
+    int n;
+    int size;
+  } actvar;
+  Labellist gt;  /* list of pending gotos */
+  Labellist label;   /* list of active labels */
+} Dyndata;
+
+
+/* control of blocks */
+struct BlockCnt;  /* defined in lparser.c */
+
+
+/* state needed to generate code for a given function */
+typedef struct FuncState {
+  Proto *f;  /* current function header */
+  Table *h;  /* table to find (and reuse) elements in `k' */
+  struct FuncState *prev;  /* enclosing function */
+  struct LexState *ls;  /* lexical state */
+  struct BlockCnt *bl;  /* chain of current blocks */
+  int pc;  /* next position to code (equivalent to `ncode') */
+  int lasttarget;   /* 'label' of last 'jump label' */
+  int jpc;  /* list of pending jumps to `pc' */
+  int nk;  /* number of elements in `k' */
+  int np;  /* number of elements in `p' */
+  int firstlocal;  /* index of first local var (in Dyndata array) */
+  short nlocvars;  /* number of elements in 'f->locvars' */
+  lu_byte nactvar;  /* number of active local variables */
+  lu_byte nups;  /* number of upvalues */
+  lu_byte freereg;  /* first free register */
+} FuncState;
+
+
+LUAI_FUNC Closure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
+                                Dyndata *dyd, const char *name, int firstchar);
+
+
+#endif