an if statement in SIC

# The below is a SIC representation of 'if 42 -> $a { say $a }'. It is an example
# of how different blocks and binding might look in SIC.

block 'main-block' {
    $0 = 42
    # should we have a boolification step?
    jnt $0, l0
    $1 = get-block 'anon-then-1'
    $2 = make-capture
    store $2[0], $0
    call $1, $2
  l0:
}

block 'anon-then-1' in 'main-block' (1) {
    $0 = param 0
    $1 = fetch '&say'
    $2 = make-capture
    store $2[0], $0
    call $1, $2
}