vendor: 引入 Lua 3.2 官方源码 + 移植评估 (lua_3.2 分支)

- 前 lua_State 时代 API(全局单例状态机), 与项目多实例+管道模式抽象冲突
- 评估结论: 不建议移植, 详见 doc/ADAPTATION-lua32.md

lib/lua/llex.h

@@ -1,5 +1,5 @@
 /*
-** $Id: llex.h $
+** $Id: llex.h,v 1.12 1999/06/17 17:04:03 roberto Exp $
 ** Lexical Analyzer
 ** See Copyright Notice in lua.h
 */
@@ -7,87 +7,58 @@
 #ifndef llex_h
 #define llex_h
 
-#include <limits.h>
-
 #include "lobject.h"
 #include "lzio.h"
 
 
-/*
-** Single-char tokens (terminal symbols) are represented by their own
-** numeric code. Other tokens start at the following value.
-*/
-#define FIRST_RESERVED	(UCHAR_MAX + 1)
+#define FIRST_RESERVED	260
 
+/* maximum length of a reserved word (+1 for terminal 0) */
+#define TOKEN_LEN	15
 
-#if !defined(LUA_ENV)
-#define LUA_ENV		"_ENV"
-#endif
-
-
-/*
-* WARNING: if you change the order of this enumeration,
-* grep "ORDER RESERVED"
-*/
 enum RESERVED {
   /* terminal symbols denoted by reserved words */
-  TK_AND = FIRST_RESERVED, TK_BREAK,
-  TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
-  TK_GLOBAL, TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR,
-  TK_REPEAT, TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
+  AND = FIRST_RESERVED,
+  DO, ELSE, ELSEIF, END, FUNCTION, IF, LOCAL, NIL, NOT, OR,
+  REPEAT, RETURN, THEN, UNTIL, WHILE,
   /* other terminal symbols */
-  TK_IDIV, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE,
-  TK_SHL, TK_SHR,
-  TK_DBCOLON, TK_EOS,
-  TK_FLT, TK_INT, TK_NAME, TK_STRING
+  NAME, CONC, DOTS, EQ, GE, LE, NE, NUMBER, STRING, EOS};
+
+
+#ifndef MAX_IFS
+#define MAX_IFS 5  /* arbitrary limit */
+#endif
+
+/* "ifstate" keeps the state of each nested $if the lexical is dealing with. */
+
+struct ifState {
+  int elsepart;  /* true if it's in the $else part */
+  int condition;  /* true if $if condition is true */
+  int skip;  /* true if part must be skipped */
 };
 
-/* number of reserved words */
-#define NUM_RESERVED	(cast_int(TK_WHILE-FIRST_RESERVED + 1))
 
-
-typedef union {
-  lua_Number r;
-  lua_Integer i;
-  TString *ts;
-} SemInfo;  /* semantics information */
-
-
-typedef struct Token {
-  int token;
-  SemInfo seminfo;
-} Token;
-
-
-/* state of the scanner plus state of the parser when shared by all
-   functions */
 typedef struct LexState {
-  int current;  /* current character (charint) */
+  int current;  /* look ahead character */
+  int token;  /* look ahead token */
+  struct FuncState *fs;  /* 'FuncState' is private for the parser */
+  union {
+    real r;
+    TaggedString *ts;
+  } seminfo;  /* semantics information */
+  struct zio *lex_z;  /* input stream */
   int linenumber;  /* input line counter */
-  int lastline;  /* line of last token 'consumed' */
-  Token t;  /* current token */
-  Token lookahead;  /* look ahead token */
-  struct FuncState *fs;  /* current function (parser) */
-  struct lua_State *L;
-  ZIO *z;  /* input stream */
-  Mbuffer *buff;  /* buffer for tokens */
-  Table *h;  /* to avoid collection/reuse strings */
-  struct Dyndata *dyd;  /* dynamic structures used by the parser */
-  TString *source;  /* current source name */
-  TString *envn;  /* environment variable name */
-  TString *brkn;  /* "break" name (used as a label) */
-  TString *glbn;  /* "global" name (when not a reserved word) */
+  int iflevel;  /* level of nested $if's (for lexical analysis) */
+  struct ifState ifstate[MAX_IFS];
 } LexState;
 
 
-LUAI_FUNC void luaX_init (lua_State *L);
-LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,
-                              TString *source, int firstchar);
-LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);
-LUAI_FUNC void luaX_next (LexState *ls);
-LUAI_FUNC int luaX_lookahead (LexState *ls);
-LUAI_FUNC l_noret luaX_syntaxerror (LexState *ls, const char *s);
-LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);
+void luaX_init (void);
+void luaX_setinput (LexState *LS, ZIO *z);
+int luaX_lex (LexState *LS);
+void luaX_syntaxerror (LexState *ls, char *s, char *token);
+void luaX_error (LexState *ls, char *s);
+void luaX_token2str (int token, char *s);
 
 
 #endif