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| proc nest(this: Expression, newExpr: Expression) = | |
| doAssert this.kind in {OR, AND, XOR} | |
| if this.left.isNil: | |
| this.left = newExpr | |
| elif this.right.isNil: | |
| this.right = newExpr | |
| else: | |
| let temp = this.right | |
| this.right = Expression(kind: this.kind, left: temp, right: newExpr) |
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