gumdrop_derive-0.2.0 doesn't have any documentation.
Provides derive(Options)
for gumdrop
crate
derive(Options)
derive(Options)
generates an implementation of the trait Options
,
creating an option for each field of the decorated struct
.
See the gumdrop
documentation for an example
of its usage.
options
attribute
Behavior of derive(Options)
can be controlled by adding #[options(...)]
attributes to one or more fields within a decorated struct.
Supported items are:
count
marks a field as a counter value. The field will be incremented each time the option appears in the arguments, i.e.field += 1;
free
marks a field as the free argument container. Non-option arguments will be appended to this field using itspush
method.short = "?"
sets the short option name to the given characterno_short
prevents a short option from being assigned to the fieldlong = "..."
sets the long option name to the given stringno_long
prevents a long option from being assigned to the fieldhelp = "..."
sets help text returned from theOptions::usage
methodmeta = "..."
sets the meta variable displayed in usage for options which accept an argument