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make flatbuffers::IsFieldPresent safer (#4988)

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Give the vtable offset enum inside each table the name
"FlatBuffersVTableOffset" and base type voffset_t so it can be used as a
dependent type in IsFieldPresent. This makes that function slightly
safer since it prevents calling it with arbitrary, non-table types.
Now, the only way to use IsFieldPresent incorrectly is to create your
own type which does not inherit from flatbuffers::Table but has a
dependent voffset convertible type "FlatBuffersVTableOffset".
This commit is contained in:
Frank Benkstein
2018-10-22 15:57:45 -07:00
committed by Wouter van Oortmerssen
parent 55b30827f2
commit ca417426c7
9 changed files with 29 additions and 25 deletions
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4
samples/monster_generated.h
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@@ -235,7 +235,7 @@ struct Monster FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
static const flatbuffers::TypeTable *MiniReflectTypeTable() {
return MonsterTypeTable();
}
enum {
enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {
VT_POS = 4,
VT_MANA = 6,
VT_HP = 8,
@@ -443,7 +443,7 @@ struct Weapon FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
static const flatbuffers::TypeTable *MiniReflectTypeTable() {
return WeaponTypeTable();
}
enum {
enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {
VT_NAME = 4,
VT_DAMAGE = 6
};