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LuaBridge - add API to try convert a value

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This in in preparation to overload operators
This commit is contained in:
Robin Gareus 2022-09-26 21:02:33 +02:00
parent fb750aa4b8
commit e98fe4729e
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 15 additions and 2 deletions
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17
libs/lua/LuaBridge/detail/Userdata.h
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@ -188,7 +188,8 @@ private:
static Userdata* getClass (lua_State* L,
int index,
void const* baseClassKey,
bool canBeConst)
bool canBeConst,
bool errorOnMismatch = true)
{
assert (index > 0);
Userdata* ud = 0;
@ -280,7 +281,7 @@ ud __parent (nil)
mismatch = true;
}
if (mismatch)
if (mismatch && errorOnMismatch)
{
assert (lua_type (L, -1) == LUA_TTABLE);
rawgetfield (L, -1, "__type");
@ -335,6 +336,18 @@ public:
return static_cast <T*> (getClass (L, index,
ClassInfo <T>::getClassKey (), canBeConst)->getPointer ());
}
template <class T>
static inline T* try_get (lua_State* L, int index, bool canBeConst)
{
if (!lua_isnil (L, index)) {
Userdata* ud = getClass (L, index, ClassInfo <T>::getClassKey (), canBeConst, false);
if (ud) {
return static_cast <T*> (ud->getPointer ());
}
}
return 0;
}
};
//----------------------------------------------------------------------------