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get_ic_attr(?X, -Attr)

Returns the IC attribute of a variable, creating a new attribute if necessary.

X: A variable
Attr: The IC attribute of <TT>X</TT>

Description

If X is a variable and does not already have an IC attribute, it is given a new one. Attr is then bound to this attribute (new or old). Attr must be a fresh variable. Fails if X is not a variable.

Fail Conditions

X is not a variable