Trying to pile up all the format specifications
TDataType class is responsible for knowing these guys
Enumerator
Type
Description
1
Char_t
...
2
Short_t
...
3
Int
...
4
Long
...
5
Float
...
6
Int
Counter
7
char*
Char Star
8
Double
...
9
Double32
...
10
char
...
11
UChar
...
12
UShort
...
13
UInt
...
14
ULong
...
15
UInt
Bits
16
Long64
...
17
ULong64
...
18
Bool
...
19
Float16
...
20
void
Void
21
UInt
DataTypeAliasUnsigned Int
22
SignedChar
DataTypeAliasSigned Char
-1
Other
Other type
0
NoType
....
TBranch -> TLeaf
TLeafI/B/C/D/F/L/S - simple leaf types
TBranchElement -> TLeafElement
Types of the BranchElement Each instance of the TBranchElement class identifies the type of the node it represents.
BranchElementType
Int
Description
kLeafNode
0
Leaf Node - not clear exactly what constitutes a leaf node
kBaseClassNode
1
Base Class Node - see ROOT src for TBranchElement.h
kObjectNode
2
Node to represent an object
kClonesNode
3
Node of Clones
kSTLNode
4
STL Container of some objects
kCLonesMemberNode
31
Member of a Clone
kSTLMemberNode
41
A Node that is a subbranch of a STLNode branch
TStreamerInfo -> TStreamerElement
TStreamerBase
TStreamerBasicPointer
TStreamerBasicType
TStreamerLoop
TStreamerObject
TStreamerObjectAny
TStreamerObjectPointer
TStreamerSTL
TStreamerString
Enumerator
Int
Description
kBase
0
Base Class Element
kOffsetL
20
Fixed Size Array
kOffsetP
40
Pointer to an object
kCounter
6
Counter for array size
kCharStar
7
Pointer to array of char
kChar
1
...
kShort
2
...
kInt
3
...
kLong
4
...
kFloat
5
...
kDouble
8
...
kDouble32
9
...
kLegacyChar
10
Equal to TDataType's kchar
kUChar
11
...
kUShort
12
...
kUInt
13
...
kULong
14
...
kBits
15
TObject::fBits in case of a referenced objet
kLong64
16
...
kULong64
17
...
kBool
18
...
kFloat16
19
...
kObject
61
Class derived from TObject
kAny
62
Class not derived from TObject
kObjectp
63
Pointer to a class derived from TObject and comment field
kObjectP
64
POinter to a class derived from TObject and with NO comment field
kTString
65
TString special case
kTObject
66
TObject special case
kTNamed
67
special case...
kAnyp
68
Pointer to a class not derived from TObject with comment field
kAnyP
69
POinter to a class not derived from TObject with NO comment field
kAnyPnoVT
70
Pointer to a class not derived from TObject with NO comment field and no virtual table
kSTLp
71
Pointer to an STL container
kSTL
300
STL Container ???
kSTLstring
365
std::string
kStreamer
500
Don't understand why, but typically all the vectors have this streamer type.
Enumerator
Int
kNotSTL
0
kSTLvector
1
kSTLlist
2
kSTLdeque
3
kSTLmap
4
kSTLmultimap
5
kSTLset
6
kSTLmultiset
7
kSTLbitset
8
kSTLforwardlist
9
kSTLunorderedset
10
kSTLunorderedmultiset
11
kSTLunorderedmap
12
kSTLunorderedmultimap
13
kSTLend
14
kSTLany
300
kSTLstring
365