R: Examples for 'rlang::is

### ** Examples

# Let's add attributes with structure() to uncopyable types. Since
# they are not copied, the attributes are changed in place:
env <- env()
structure(env, foo = "bar")

<environment: 0x55ccfea10510>
attr(,"foo")
[1] "bar"

env

<environment: 0x55ccfea10510>
attr(,"foo")
[1] "bar"

# These objects that can only be changed with side effect are not
# copyable:
is_copyable(env)

[1] FALSE

structure(base::list, foo = "bar")

function (...)  .Primitive("list")
attr(,"foo")
[1] "bar"

str(base::list)

function (...)  
 - attr(*, "foo")= chr "bar"

Examples for 'rlang::is_copyable'

Is an object copyable?