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discard """
nimout: '''
Fibonacci sequence: 0, 1, 1, 2, 3
Sequence continues: 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610
'''
"""
import strformat
var fib_n {.compileTime.}: int
var fib_prev {.compileTime.}: int
var fib_prev_prev {.compileTime.}: int
proc next_fib(): int {.compileTime.} =
let fib = if fib_n < 2:
fib_n
else:
fib_prev_prev + fib_prev
inc(fib_n)
fib_prev_prev = fib_prev
fib_prev = fib
fib
const f0 = next_fib()
const f1 = next_fib()
const f2 = next_fib()
const f3 = next_fib()
const f4 = next_fib()
static:
echo fmt"Fibonacci sequence: {f0}, {f1}, {f2}, {f3}, {f4}"
const fib_continues = block:
var result = fmt"Sequence continues: "
for i in 0..10:
if i > 0:
add(result, ", ")
add(result, $next_fib())
result
static:
echo fib_continues
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