diff options
Diffstat (limited to 'generic/tclOODefineCmds.c')
| -rw-r--r-- | generic/tclOODefineCmds.c | 48 |
1 files changed, 29 insertions, 19 deletions
diff --git a/generic/tclOODefineCmds.c b/generic/tclOODefineCmds.c index bacab38..1a5058c 100644 --- a/generic/tclOODefineCmds.c +++ b/generic/tclOODefineCmds.c @@ -2206,29 +2206,39 @@ ClassSuperSet( /* * Parse the arguments to get the class to use as superclasses. + * + * Note that zero classes is special, as it is equivalent to just the + * class of objects. [Bug 9d61624b3d] */ - for (i=0 ; i<superc ; i++) { - superclasses[i] = GetClassInOuterContext(interp, superv[i], - "only a class can be a superclass"); - if (superclasses[i] == NULL) { - goto failedAfterAlloc; - } - for (j=0 ; j<i ; j++) { - if (superclasses[j] == superclasses[i]) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "class should only be a direct superclass once", -1)); - Tcl_SetErrorCode(interp, "TCL", "OO", "REPETITIOUS", NULL); + if (superc == 0) { + superclasses = ckrealloc(superclasses, sizeof(Class *)); + superclasses[0] = oPtr->fPtr->objectCls; + superc = 1; + } else { + for (i=0 ; i<superc ; i++) { + superclasses[i] = GetClassInOuterContext(interp, superv[i], + "only a class can be a superclass"); + if (superclasses[i] == NULL) { goto failedAfterAlloc; } - } - if (TclOOIsReachable(oPtr->classPtr, superclasses[i])) { - Tcl_SetObjResult(interp, Tcl_NewStringObj( - "attempt to form circular dependency graph", -1)); - Tcl_SetErrorCode(interp, "TCL", "OO", "CIRCULARITY", NULL); - failedAfterAlloc: - ckfree((char *) superclasses); - return TCL_ERROR; + for (j=0 ; j<i ; j++) { + if (superclasses[j] == superclasses[i]) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "class should only be a direct superclass once", + -1)); + Tcl_SetErrorCode(interp, "TCL", "OO", "REPETITIOUS",NULL); + goto failedAfterAlloc; + } + } + if (TclOOIsReachable(oPtr->classPtr, superclasses[i])) { + Tcl_SetObjResult(interp, Tcl_NewStringObj( + "attempt to form circular dependency graph", -1)); + Tcl_SetErrorCode(interp, "TCL", "OO", "CIRCULARITY", NULL); + failedAfterAlloc: + ckfree((char *) superclasses); + return TCL_ERROR; + } } } |