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plain) (
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discard """
output: '''
Test
abcxyz123
'''
"""
proc fakeReadLine(): string =
"abcxyz123"
type
TMaybe[T] = object
case empty: bool
of false: value: T
else: nil
proc Just*[T](val: T): TMaybe[T] =
result.empty = false
result.value = val
proc Nothing[T](): TMaybe[T] =
result.empty = true
proc safeReadLine(): TMaybe[string] =
var r = fakeReadLine()
if r == "": return Nothing[string]()
else: return Just(r)
when isMainModule:
var Test = Just("Test")
echo(Test.value)
var mSomething = safeReadLine()
echo(mSomething.value)
mSomething = safeReadLine()
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