R: Examples for 'rlang::on

### ** Examples

quote({  # Not run

# First add `run_on_load()` to your `.onLoad()` hook,
# then use `on_load()` anywhere in your package
.onLoad <- function(lib, pkg) {
  run_on_load()
}

# Register a method on load
on_load({
  s3_register("foo::bar", "my_class")
})

# Assign an object on load
var <- NULL
on_load({
  var <- foo()
})

# To use `on_package_load()` at top level, wrap it in `on_load()`
on_load({
  on_package_load("foo", message("foo is loaded"))
})

# In functions it can be called directly
f <- function() on_package_load("foo", message("foo is loaded"))

})

{
    .onLoad <- function(lib, pkg) {
        run_on_load()
    }
    on_load({
        s3_register("foo::bar", "my_class")
    })
    var <- NULL
    on_load({
        var <- foo()
    })
    on_load({
        on_package_load("foo", message("foo is loaded"))
    })
    f <- function() on_package_load("foo", message("foo is loaded"))
}

Examples for 'rlang::on_load'

Run expressions on load