2.7.14.1 Cat

The list concatenation operation has this representation in virtual code.

T28

[[cat]] = ((nil,nil),(nil,nil))

This function takes a pair of lists as an argument, an returns the list obtained by appending the right one to the left. The semantics of concatenation is what one would expect.

P35

[[cat]] (nil,z) = z

P36

[[cat]] ((x,y),z) = (x,[[cat]] (y,z))

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