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'luaH_fastseti' uses 'checknoTM'

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The extra check in checknoTM (versus only checking whether there is a
metatable) is cheap, and it is not that uncommon for a table to have a
metatable without a __newindex metafield.
This commit is contained in:
Roberto Ierusalimschy
2024-12-11 15:32:43 -03:00
parent 25a491fe34
commit 412e9a4d95
1 changed files with 1 additions and 1 deletions
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2
ltable.h
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@@ -58,7 +58,7 @@
{ Table *h = t; lua_Unsigned u = l_castS2U(k) - 1u; \ { Table *h = t; lua_Unsigned u = l_castS2U(k) - 1u; \
if ((u < h->asize)) { \ if ((u < h->asize)) { \
lu_byte *tag = getArrTag(h, u); \ lu_byte *tag = getArrTag(h, u); \
if (h->metatable == NULL || !tagisempty(*tag)) \ if (checknoTM(h->metatable, TM_NEWINDEX) || !tagisempty(*tag)) \
{ fval2arr(h, u, tag, val); hres = HOK; } \ { fval2arr(h, u, tag, val); hres = HOK; } \
else hres = ~cast_int(u); } \ else hres = ~cast_int(u); } \
else { hres = luaH_psetint(h, k, val); }} else { hres = luaH_psetint(h, k, val); }}