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discard """
output: "21"
"""
import macros
type
TMat = object
dummy: int
proc `*`(a, b: TMat): TMat = nil
proc `+`(a, b: TMat): TMat = nil
proc `-`(a, b: TMat): TMat = nil
proc `$`(a: TMat): string = result = $a.dummy
proc mat21(): TMat =
result.dummy = 21
macro optOps{ (`+`|`-`|`*`) ** a }(a: TMat): expr =
echo treeRepr(a)
result = newCall(bindSym"mat21")
#macro optPlus{ `+` * a }(a: varargs[TMat]): expr =
# result = newIntLitNode(21)
var x, y, z: TMat
echo x + y * z - x
#echo x + y + z
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