ops_fusion_generator.nim

import macros

type Kernel = object
  mr*, nr*: int
  epilogue*: NimNode

template impl(c: var int, x, y: int,
            mr, nr: static int, epilogue: untyped
        ): untyped =

  c = x*mr + y*nr

  template it(): untyped = c # inject
  c = epilogue

template op_generator(
      op_name: untyped, epilogue: untyped
    ): untyped =

  proc `op_name`(c: var int, x, y: int) =
    if x < 10:
      impl(c, x, y, 10, 10, epilogue)
    else:
      impl(c, x, y, 100, 100, epilogue)

op_generator(min10):
  min(it, 10)

var c = 0

min10(c, 1, 2)

echo c