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ArgumentTools

Guides

  • ArgumentTools

Symbols

  • Argument
  • Cocomposition
  • Coidentity
  • Cosequence
  • Cozero
  • Held
  • RightCocomposition
Wolfram`ArgumentTools`
Held
​
Held[expr]
represents held form of
expr
.
​
Details and Options

Examples  
(6)
Basic Examples  
(2)
Feed a held expression to
Length
:
In[1]:=
Length
Held
[5+6+7+8]
Out[1]=
4
​
Replace
a held expression:
In[1]:=
Replace
Held
[2+3],x_+y_xy
Out[1]=
6
Scope  
(2)

Properties & Relations  
(2)

SeeAlso
Unevaluated
▪
Evaluate
▪
Hold
▪
HoldComplete
▪
HoldAll
▪
HoldAllComplete
▪
HoldFirst
▪
HoldRest
▪
SequenceHold
RelatedLinks
https://resources.wolframcloud.com/FunctionRepository/resources/HoldArguments
https://resources.wolframcloud.com/FunctionRepository/resources/ReplaceAllUnheld
https://mathematica.stackexchange.com/questions/170144/return-unevaluated-expression-from-function
""

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