Description Usage Arguments Details Value
View source: R/parse_argument.R
An argument definition as passed to function_
is checked and
parsed. The argument is expected to have the syntax name ~ type: default
where the : default
is optional specification of the default value.
1 | parse_argument(arg)
|
arg |
A language object representing the argument. |
Note that since a default value can be NULL
, it is necessary to
check whether the default was specified in the argument, see the return value.
list with the following entries:
type
character: the type
name
character: the name
has_default
logical: whether a default value was specified
default
the default value (or NULL if not specified.)
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