chickadee » generalized-arrays » storage-class-mutator

storage-class-mutator storage-classprocedure

Returns the mutator of storage-class as a procedure. This procedure takes three arguments, a storage object, an exact non-negative integer, and a value. It mutates the element of the object specified by the index to be the value. It is an error if the index is greater than or equal to the size, or if the object is not capable of storing the value.