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• → SetAttributes

SequenceHold

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SequenceHold

is an attribute that prevents Sequence objects from being spliced into a function's arguments.

Normally, Sequence will be spliced into a function:

• • f[Sequence[a, b]]

It does not for SequenceHold functions:

• • SetAttributes[f, SequenceHold]

• • f[Sequence[a, b]]

E.g., Set has attribute SequenceHold to allow assignment of sequences to variables:

• • s = Sequence[a, b];

• • s

• • Plus[s]