pub struct Empty {}
Expand description
A struct that may be used when either configuration or command line options are not needed.
When the application doesn’t need the configuration (in excess of the automatic part provided by this library) or it doesn’t need any command line options of its own, this struct can be used to plug the type parameter.
Other places (eg. around helpers) may use this to plug a type parameter that isn’t needed, do nothing or something like that.
Trait Implementations§
source§impl<'de> Deserialize<'de> for Empty
impl<'de> Deserialize<'de> for Empty
source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
source§impl Ord for Empty
impl Ord for Empty
source§impl PartialOrd<Empty> for Empty
impl PartialOrd<Empty> for Empty
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for
self
and other
) and is used by the <=
operator. Read moresource§impl StructOpt for Empty
impl StructOpt for Empty
source§fn from_clap(matches: &ArgMatches<'_>) -> Self
fn from_clap(matches: &ArgMatches<'_>) -> Self
Creates the struct from
clap::ArgMatches
. It cannot fail
with a parameter generated by clap
by construction. Read moresource§fn from_args() -> Selfwhere
Self: Sized,
fn from_args() -> Selfwhere
Self: Sized,
Gets the struct from the command line arguments. Print the
error message and quit the program in case of failure. Read more
source§fn from_iter<I>(iter: I) -> Selfwhere
Self: Sized,
I: IntoIterator,
<I as IntoIterator>::Item: Into<OsString> + Clone,
fn from_iter<I>(iter: I) -> Selfwhere
Self: Sized,
I: IntoIterator,
<I as IntoIterator>::Item: Into<OsString> + Clone,
Gets the struct from any iterator such as a
Vec
of your making.
Print the error message and quit the program in case of failure. Read moresource§fn from_iter_safe<I>(iter: I) -> Result<Self, Error>where
Self: Sized,
I: IntoIterator,
<I as IntoIterator>::Item: Into<OsString> + Clone,
fn from_iter_safe<I>(iter: I) -> Result<Self, Error>where
Self: Sized,
I: IntoIterator,
<I as IntoIterator>::Item: Into<OsString> + Clone,
Gets the struct from any iterator such as a
Vec
of your making. Read more