diff options
Diffstat (limited to 'libs/liblua/src/lobject.h')
| -rw-r--r-- | libs/liblua/src/lobject.h | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/libs/liblua/src/lobject.h b/libs/liblua/src/lobject.h index a9d45785ec..1cc8e757bf 100644 --- a/libs/liblua/src/lobject.h +++ b/libs/liblua/src/lobject.h @@ -21,10 +21,12 @@ */ #define LUA_TUPVAL LUA_NUMTYPES /* upvalues */ #define LUA_TPROTO (LUA_NUMTYPES+1) /* function prototypes */ +#define LUA_TDEADKEY (LUA_NUMTYPES+2) /* removed keys in tables */ + /* -** number of all possible types (including LUA_TNONE) +** number of all possible types (including LUA_TNONE but excluding DEADKEY) */ #define LUA_TOTALTYPES (LUA_TPROTO + 2) @@ -555,7 +557,7 @@ typedef struct Proto { /* ** {================================================================== -** Closures +** Functions ** =================================================================== */ @@ -743,13 +745,13 @@ typedef struct Table { /* -** Use a "nil table" to mark dead keys in a table. Those keys serve -** to keep space for removed entries, which may still be part of -** chains. Note that the 'keytt' does not have the BIT_ISCOLLECTABLE -** set, so these values are considered not collectable and are different -** from any valid value. +** Dead keys in tables have the tag DEADKEY but keep their original +** gcvalue. This distinguishes them from regular keys but allows them to +** be found when searched in a special way. ('next' needs that to find +** keys removed from a table during a traversal.) */ -#define setdeadkey(n) (keytt(n) = LUA_TTABLE, gckey(n) = NULL) +#define setdeadkey(node) (keytt(node) = LUA_TDEADKEY) +#define keyisdead(node) (keytt(node) == LUA_TDEADKEY) /* }================================================================== */ |