Predeclared in PAIR MUTATOR

Functions

set_head(`p`, `x`) → {None}

changes the pair p such that its head is x.

Parameters:

Name	Type	Description
`p`	pair	given value
`x`	value	given value

Returns:

None

Type: None

set_tail(`p`, `x`) → {None}

changes the pair p such that its tail is x.

Parameters:

Name	Type	Description
`p`	pair	given value
`x`	value	given value

Returns:

None

Type: None