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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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18
include/flatbuffers/reflection_generated.h
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@@ -100,7 +100,7 @@ inline const char *EnumNameBaseType(BaseType e) {
}
struct Type FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
enum {
enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {
VT_BASE_TYPE = 4,
VT_ELEMENT = 6,
VT_INDEX = 8
@@ -160,7 +160,7 @@ inline flatbuffers::Offset<Type> CreateType(
}
struct KeyValue FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
enum {
enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {
VT_KEY = 4,
VT_VALUE = 6
};
@@ -229,7 +229,7 @@ inline flatbuffers::Offset<KeyValue> CreateKeyValueDirect(
}
struct EnumVal FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
enum {
enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {
VT_NAME = 4,
VT_VALUE = 6,
VT_OBJECT = 8,
@@ -337,7 +337,7 @@ inline flatbuffers::Offset<EnumVal> CreateEnumValDirect(
}
struct Enum FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
enum {
enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {
VT_NAME = 4,
VT_VALUES = 6,
VT_IS_UNION = 8,
@@ -462,7 +462,7 @@ inline flatbuffers::Offset<Enum> CreateEnumDirect(
}
struct Field FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
enum {
enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {
VT_NAME = 4,
VT_TYPE = 6,
VT_ID = 8,
@@ -644,7 +644,7 @@ inline flatbuffers::Offset<Field> CreateFieldDirect(
}
struct Object FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
enum {
enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {
VT_NAME = 4,
VT_FIELDS = 6,
VT_IS_STRUCT = 8,
@@ -779,7 +779,7 @@ inline flatbuffers::Offset<Object> CreateObjectDirect(
}
struct RPCCall FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
enum {
enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {
VT_NAME = 4,
VT_REQUEST = 6,
VT_RESPONSE = 8,
@@ -891,7 +891,7 @@ inline flatbuffers::Offset<RPCCall> CreateRPCCallDirect(
}
struct Service FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
enum {
enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {
VT_NAME = 4,
VT_CALLS = 6,
VT_ATTRIBUTES = 8,
@@ -989,7 +989,7 @@ inline flatbuffers::Offset<Service> CreateServiceDirect(
}
struct Schema FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {
enum {
enum FlatBuffersVTableOffset FLATBUFFERS_VTABLE_UNDERLYING_TYPE {
VT_OBJECTS = 4,
VT_ENUMS = 6,
VT_FILE_IDENT = 8,