char ......................................... Builtin basic type unsigned char ................................ Builtin basic type short ........................................ Builtin basic type unsigned short ............................... Builtin basic type int .......................................... Builtin basic type unsigned int ................................. Builtin basic type long ......................................... Builtin basic type unsigned long ................................ Builtin basic type long long .................................... Builtin basic type unsigned long long ........................... Builtin basic type float ........................................ Builtin basic type double ....................................... Builtin basic type void ......................................... Builtin basic type bool ......................................... Builtin basic type Char_t ....................................... Signed Character 1 byte (char) Int_t ........................................ Signed integer 4 bytes (int) Bool_t ....................................... Boolean (0=false, 1=true) (bool) Version_t .................................... Class version identifier (short) Float_t ...................................... Float 4 bytes (float) Double_t ..................................... Double 8 bytes Option_t ..................................... Option string (const char) UInt_t ....................................... Unsigned integer 4 bytes (unsigned int) ULong_t ...................................... Unsigned long integer 4 bytes (unsigned long) Long64_t ..................................... Portable signed long integer 8 bytes Short_t ...................................... Signed Short integer 2 bytes (short) Long_t ....................................... Signed long integer 4 bytes (long) Style_t ...................................... Style number (short) Width_t ...................................... Line width (short) Color_t ...................................... Color number (short) Size_t ....................................... Attribute size (float) Text_t ....................................... General string (char) Axis_t ....................................... Axis values type (double) Marker_t ..................................... Marker number (short) UShort_t ..................................... Unsigned Short integer 2 bytes (unsigned short) Font_t ....................................... Font number (short) Pixmap_t ..................................... Pixmap handle Stat_t ....................................... Statistics type (double) UChar_t ...................................... Unsigned Character 1 byte (unsigned char) ULong64_t .................................... Portable unsigned long integer 8 bytes CheckSecCtx_t ................................ Int_t (*CheckSecCtx_t)(const char *subj, TSecContext *ctx); GlobusAuth_t ................................. Int_t (*GlobusAuth_t)(TAuthenticate *auth, TString &user, TString &det); Krb5Auth_t ................................... Int_t (*Krb5Auth_t)(TAuthenticate *auth, TString &user, TString &det, Int_t version); SecureAuth_t ................................. Int_t (*SecureAuth_t)(TAuthenticate *auth, const char *user, const char *passwd, MemberStreamerFunc_t ......................... Streamer function for a data member VoidFuncPtr_t ................................ pointer to void function ShowMembersFunc_t ............................ void (*ShowMembersFunc_t)(void *obj, TMemberInspector &R__insp, char *R__parent); IsAFunc_t .................................... TClass *(*IsAFunc_t)(const void *obj); IsAGlobalFunc_t .............................. TClass *(*IsAGlobalFunc_t)(const TClass*, const void *obj); ROOT::NewFunc_t .............................. void *(*NewFunc_t)(void *); ROOT::NewArrFunc_t ........................... void *(*NewArrFunc_t)(Long_t size); ROOT::DelFunc_t .............................. void (*DelFunc_t)(void *); ROOT::DelArrFunc_t ........................... void (*DelArrFunc_t)(void *); ROOT::DesFunc_t .............................. void (*DesFunc_t)(void *); TAssoc ....................................... for backward compatibility Handle_t ..................................... Generic resource handle Display_t .................................... Display handle Visual_t ..................................... Visual handle Window_t ..................................... Window handle Drawable_t ................................... Drawable handle Region_t ..................................... Region handle Colormap_t ................................... Colormap handle Cursor_t ..................................... Cursor handle FontH_t ...................................... Font handle (as opposed to Font_t which is an index) KeySym_t ..................................... Key symbol handle Atom_t ....................................... WM token GContext_t ................................... Graphics context handle FontStruct_t ................................. Pointer to font structure Mask_t ....................................... Structure mask type Time_t ....................................... Event time Ssiz_t ....................................... String size (int) FreeHookFun_t ................................ void (*FreeHookFun_t)(void*, void *addr, size_t); ReAllocFun_t ................................. void *(*ReAllocFun_t)(void*, size_t); ReAllocCFun_t ................................ void *(*ReAllocCFun_t)(void*, size_t, size_t); SCoord_t ..................................... Screen coordinates (short) Double32_t ................................... Double 8 bytes in memory, written as a 4 bytes float Pixel_t ...................................... Pixel value ios_base::event_callback ..................... void (*event_callback) (event, ios_base&, int index); TPainter3dAlgorithms::DrawFaceFunc_t ......... void (TPainter3dAlgorithms::*DrawFaceFunc_t)(Int_t *, Double_t *, Int_t, Int_t *, Double_t *); TPainter3dAlgorithms::LegoFunc_t ............. void (TPainter3dAlgorithms::*LegoFunc_t)(Int_t,Int_t,Int_t&,Double_t*,Double_t*,Double_t*); TPainter3dAlgorithms::SurfaceFunc_t .......... void (TPainter3dAlgorithms::*SurfaceFunc_t)(Int_t,Int_t,Double_t*,Double_t*); ROOT::TBranchProxyClassDescriptor::EInClones . for IsClones TThread::VoidRtnFunc_t ....................... void *(*VoidRtnFunc_t)(void *); TThread::VoidFunc_t .......................... void (*VoidFunc_t)(void *); COMPAREMETHOD ................................ Int_t (*COMPAREMETHOD)(const void **, const void **); SEARCHMETHOD ................................. Int_t (*SEARCHMETHOD) (const void *, const void **);