2OVER

Copies the second topmost pair of items to the top of the stack

Input stack: a b c d

Output stack: a b c d a b

PumpkinDB> 1 2 3 4 2OVER
1 2 3 4 1 2

Allocation

None

Errors

EmptyStack error if there are less than four items on the stack

Tests

works : 1 2 3 4 2OVER STACK [1 2 3 4 1 2] EQUAL?.
empty_stack : [2OVER] TRY UNWRAP 0x04 EQUAL?.
empty_stack_1 : [1 2OVER] TRY UNWRAP 0x04 EQUAL?.
empty_stack_2 : [1 2 2OVER] TRY UNWRAP 0x04 EQUAL?.
empty_stack_3 : [1 2 3 2OVER] TRY UNWRAP 0x04 EQUAL?.

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