Created
October 8, 2025 10:26
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| library(S7) | |
| ScalarDouble <- new_class("ScalarDouble", | |
| properties = list(value = class_double), | |
| constructor = function(value) { | |
| stopifnot(is.double(value), length(value) == 1) | |
| new_object(ScalarDouble, value = value) | |
| } | |
| ) | |
| add <- new_generic("add", c("x", "y")) | |
| method(add, list(ScalarDouble, ScalarDouble)) <- function(x, y) { | |
| ScalarDouble(x@value + y@value) | |
| } | |
| a <- ScalarDouble(3.14) | |
| b <- ScalarDouble(2.1) | |
| add(a, b) | |
| # <ScalarDouble> 5.24 |
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