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UpValues

UpValues[f]
gives a list of transformation rules corresponding to all upvalues defined for the symbol f.
  • You can specify the upvalues for f by making an assignment of the form UpValues[f]=list.
Define upvalues for a symbol :
These are the upvalues associated with :
Define upvalues for a symbol :
In[1]:=
Click for copyable input
These are the upvalues associated with :
In[2]:=
Click for copyable input
Out[2]=
UpValues returns rules corresponding to upvalues defined for a symbol:
UpValues can be used to set the values directly:
Copy a symbol's definitions to another symbol:
HoldPattern is used to protect the rules from their own definitions:
Definition and Information display upvalues but do not return them as values:
UpValues returns a value that can be used in a program:
Evaluation of an expression involves applying matching upvalues:
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