tests/patterns/tpartial.nim


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discard """
  output: '''-2'''
"""

proc p(x, y: int; cond: bool): int =
  result = if cond: x + y else: x - y

template optP{p(x, y, true)}(x, y: expr): expr = x - y
template optP{p(x, y, false)}(x, y: expr): expr = x + y

echo p(2, 4, true)