pub struct RelativePathBuf { /* private fields */ }
Expand description

A PathBuf that knows the path of the file it was configured in, if any.

Paths in configuration files are often desired to be relative to the configuration file itself. For example, a path of a/b.html configured in a file /var/config.toml might be desired to resolve as /var/a/b.html. This type makes this possible by simply delcaring the configuration value’s type as RelativePathBuf.

§Example

use std::path::Path;

use serde::{Deserialize, Serialize};
use figment::{Figment, value::magic::RelativePathBuf, Jail};
use figment::providers::{Env, Format, Toml, Serialized};

#[derive(Debug, PartialEq, Deserialize, Serialize)]
struct Config {
    path: RelativePathBuf,
}

Jail::expect_with(|jail| {
    // Note that `jail.directory()` is some non-empty path:
    assert_ne!(jail.directory(), Path::new("/"));

    // When a path is declared in a file and deserialized as
    // `RelativePathBuf`, `relative()` will be relative to the file.
    jail.create_file("Config.toml", r#"path = "a/b/c.html""#)?;
    let c: Config = Figment::from(Toml::file("Config.toml")).extract()?;
    assert_eq!(c.path.original(), Path::new("a/b/c.html"));
    assert_eq!(c.path.relative(), jail.directory().join("a/b/c.html"));
    assert_ne!(c.path.relative(), Path::new("a/b/c.html"));

    // Round-tripping a `RelativePathBuf` preserves path-relativity.
    let c: Config = Figment::from(Serialized::defaults(&c)).extract()?;
    assert_eq!(c.path.original(), Path::new("a/b/c.html"));
    assert_eq!(c.path.relative(), jail.directory().join("a/b/c.html"));
    assert_ne!(c.path.relative(), Path::new("a/b/c.html"));

    // If a path is declared elsewhere, the "relative" path is the original.
    jail.set_env("PATH", "a/b/c.html");
    let c: Config = Figment::from(Toml::file("Config.toml"))
        .merge(Env::raw().only(&["PATH"]))
        .extract()?;

    assert_eq!(c.path.original(), Path::new("a/b/c.html"));
    assert_eq!(c.path.relative(), Path::new("a/b/c.html"));

    // Absolute paths remain unchanged.
    jail.create_file("Config.toml", r#"path = "/var/c.html""#);
    let c: Config = Figment::from(Toml::file("Config.toml")).extract()?;
    assert_eq!(c.path.original(), Path::new("/var/c.html"));
    assert_eq!(c.path.relative(), Path::new("/var/c.html"));

    // You can use the `From<P: AsRef<Path>>` impl to set defaults:
    let figment = Figment::from(Serialized::defaults(Config {
        path: "some/default/path".into()
    }));

    let default: Config = figment.extract()?;
    assert_eq!(default.path.original(), Path::new("some/default/path"));
    assert_eq!(default.path.relative(), Path::new("some/default/path"));

    jail.create_file("Config.toml", r#"path = "an/override""#)?;
    let overriden: Config = figment.merge(Toml::file("Config.toml")).extract()?;
    assert_eq!(overriden.path.original(), Path::new("an/override"));
    assert_eq!(overriden.path.relative(), jail.directory().join("an/override"));

    Ok(())
});

§Serialization

By default, a RelativePathBuf serializes into a structure that can only deserialize as a RelativePathBuf. In particular, a RelativePathBuf does not serialize into a value compatible with PathBuf. To serialize into a Path, use RelativePathBuf::serialize_original() or RelativePathBuf::serialize_relative() together with serde’s serialize_with field attribute:

use std::path::PathBuf;

use serde::{Deserialize, Serialize};
use figment::{Figment, value::magic::RelativePathBuf, Jail};
use figment::providers::{Format, Toml, Serialized};

#[derive(Deserialize, Serialize)]
struct Config {
    relative: RelativePathBuf,
    #[serde(serialize_with = "RelativePathBuf::serialize_original")]
    root: RelativePathBuf,
    #[serde(serialize_with = "RelativePathBuf::serialize_relative")]
    temp: RelativePathBuf,
}

Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#"
        relative = "relative/path"
        root = "root/path"
        temp = "temp/path"
    "#)?;

    // Create a figment with a serialize `Config`.
    let figment = Figment::from(Toml::file("Config.toml"));
    let config = figment.extract::<Config>()?;
    let figment = Figment::from(Serialized::defaults(config));

    // This fails, as expected.
    let relative = figment.extract_inner::<PathBuf>("relative");
    assert!(relative.is_err());

    // These succeed. This one uses the originally written path.
    let root = figment.extract_inner::<PathBuf>("root")?;
    assert_eq!(root, PathBuf::from("root/path"));

    // This one the magic relative path.
    let temp = figment.extract_inner::<PathBuf>("temp")?;
    assert_eq!(temp, jail.directory().join("temp/path"));

    Ok(())
})

Implementations§

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impl RelativePathBuf

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pub fn original(&self) -> &Path

Returns the path as it was declared, without modification.

§Example
use std::path::Path;

use figment::{Figment, value::magic::RelativePathBuf, Jail};
use figment::providers::{Format, Toml};

#[derive(Debug, PartialEq, serde::Deserialize)]
struct Config {
    path: RelativePathBuf,
}

Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#"path = "hello.html""#)?;
    let c: Config = Figment::from(Toml::file("Config.toml")).extract()?;
    assert_eq!(c.path.original(), Path::new("hello.html"));

    Ok(())
});
source

pub fn relative(&self) -> PathBuf

Returns this path resolved relative to the file it was declared in, if any.

If the configured path was relative and it was configured from a file, this function returns that path prefixed with that file’s parent directory. Otherwise it returns the original path. Where config_file_path is the location of the configuration file, this corresponds to:

let relative = config_file_path
    .parent()
    .unwrap()
    .join(relative_path_buf.original());
§Example
use std::path::Path;

use figment::{Figment, value::magic::RelativePathBuf, Jail};
use figment::providers::{Env, Format, Toml};

#[derive(Debug, PartialEq, serde::Deserialize)]
struct Config {
    path: RelativePathBuf,
}

Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#"path = "hello.html""#)?;
    let c: Config = Figment::from(Toml::file("Config.toml")).extract()?;
    assert_eq!(c.path.relative(), jail.directory().join("hello.html"));

    jail.set_env("PATH", r#"hello.html"#);
    let c: Config = Figment::from(Env::raw().only(&["PATH"])).extract()?;
    assert_eq!(c.path.relative(), Path::new("hello.html"));

    Ok(())
});
source

pub fn metadata_path(&self) -> Option<&Path>

Returns the path to the file this path was declared in, if any.

§Example
use std::path::Path;

use figment::{Figment, value::magic::RelativePathBuf, Jail};
use figment::providers::{Env, Format, Toml};

#[derive(Debug, PartialEq, serde::Deserialize)]
struct Config {
    path: RelativePathBuf,
}

Jail::expect_with(|jail| {
    jail.create_file("Config.toml", r#"path = "hello.html""#)?;
    let c: Config = Figment::from(Toml::file("Config.toml")).extract()?;
    assert_eq!(c.path.metadata_path().unwrap(), jail.directory().join("Config.toml"));

    jail.set_env("PATH", r#"hello.html"#);
    let c: Config = Figment::from(Env::raw().only(&["PATH"])).extract()?;
    assert_eq!(c.path.metadata_path(), None);

    Ok(())
});
source

pub fn serialize_original<S>( &self, ser: S ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where S: Serializer,

Serialize self as the original path.

See serialization for more.

§Example
use std::path::PathBuf;
use figment::value::magic::RelativePathBuf;
use serde::Serialize;

#[derive(Serialize)]
struct Config {
    #[serde(serialize_with = "RelativePathBuf::serialize_original")]
    path: RelativePathBuf,
}
source

pub fn serialize_relative<S>( &self, ser: S ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where S: Serializer,

Serialize self as the relative path.

See serialization for more.

§Example
use std::path::PathBuf;
use figment::value::magic::RelativePathBuf;
use serde::Serialize;

#[derive(Serialize)]
struct Config {
    #[serde(serialize_with = "RelativePathBuf::serialize_relative")]
    path: RelativePathBuf,
}

Trait Implementations§

source§

impl Clone for RelativePathBuf

source§

fn clone(&self) -> RelativePathBuf

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for RelativePathBuf

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for RelativePathBuf

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fn deserialize<__D>( __deserializer: __D ) -> Result<RelativePathBuf, <__D as Deserializer<'de>>::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl<P> From<P> for RelativePathBuf
where P: AsRef<Path>,

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fn from(path: P) -> RelativePathBuf

Converts to this type from the input type.
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impl PartialEq for RelativePathBuf

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fn eq(&self, other: &RelativePathBuf) -> bool

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for RelativePathBuf

source§

fn serialize<__S>( &self, __serializer: __S ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Magic for RelativePathBuf

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Apply a style wholesale to self. Any previous style is replaced. Read more
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impl<T> Pipe for T
where T: ?Sized,

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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R
where R: 'a,

Borrows self and passes that borrow into the pipe function. Read more
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fn pipe_ref_mut<'a, R>(&'a mut self, func: impl FnOnce(&'a mut Self) -> R) -> R
where R: 'a,

Mutably borrows self and passes that borrow into the pipe function. Read more
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fn pipe_borrow<'a, B, R>(&'a self, func: impl FnOnce(&'a B) -> R) -> R
where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

Borrows self, then passes self.borrow() into the pipe function. Read more
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fn pipe_borrow_mut<'a, B, R>( &'a mut self, func: impl FnOnce(&'a mut B) -> R ) -> R
where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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fn pipe_as_ref<'a, U, R>(&'a self, func: impl FnOnce(&'a U) -> R) -> R
where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

Borrows self, then passes self.as_ref() into the pipe function.
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fn pipe_as_mut<'a, U, R>(&'a mut self, func: impl FnOnce(&'a mut U) -> R) -> R
where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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fn pipe_deref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R
where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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fn pipe_deref_mut<'a, T, R>( &'a mut self, func: impl FnOnce(&'a mut T) -> R ) -> R
where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T, Conn> RunQueryDsl<Conn> for T

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fn execute<'conn, 'query>( self, conn: &'conn mut Conn ) -> <Conn as AsyncConnection>::ExecuteFuture<'conn, 'query>
where Conn: AsyncConnection + Send, Self: ExecuteDsl<Conn> + 'query,

Executes the given command, returning the number of rows affected. Read more
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fn load<'query, 'conn, U>( self, conn: &'conn mut Conn ) -> AndThen<Self::LoadFuture<'conn>, TryCollect<Self::Stream<'conn>, Vec<U>>, fn(_: Self::Stream<'conn>) -> TryCollect<Self::Stream<'conn>, Vec<U>>>
where U: Send, Conn: AsyncConnection, Self: LoadQuery<'query, Conn, U> + 'query,

Executes the given query, returning a Vec with the returned rows. Read more
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fn load_stream<'conn, 'query, U>( self, conn: &'conn mut Conn ) -> Self::LoadFuture<'conn>
where Conn: AsyncConnection, U: 'conn, Self: LoadQuery<'query, Conn, U> + 'query,

Executes the given query, returning a Stream with the returned rows. Read more
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fn get_result<'query, 'conn, U>( self, conn: &'conn mut Conn ) -> AndThen<Self::LoadFuture<'conn>, Map<StreamFuture<Pin<Box<Self::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<Self::Stream<'conn>>>)) -> Result<U, Error>>, fn(_: Self::Stream<'conn>) -> Map<StreamFuture<Pin<Box<Self::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<Self::Stream<'conn>>>)) -> Result<U, Error>>>
where U: Send + 'conn, Conn: AsyncConnection, Self: LoadQuery<'query, Conn, U> + 'query,

Runs the command, and returns the affected row. Read more
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fn get_results<'query, 'conn, U>( self, conn: &'conn mut Conn ) -> AndThen<Self::LoadFuture<'conn>, TryCollect<Self::Stream<'conn>, Vec<U>>, fn(_: Self::Stream<'conn>) -> TryCollect<Self::Stream<'conn>, Vec<U>>>
where U: Send, Conn: AsyncConnection, Self: LoadQuery<'query, Conn, U> + 'query,

Runs the command, returning an Vec with the affected rows. Read more
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fn first<'query, 'conn, U>( self, conn: &'conn mut Conn ) -> AndThen<<Self::Output as LoadQuery<'query, Conn, U>>::LoadFuture<'conn>, Map<StreamFuture<Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>)) -> Result<U, Error>>, fn(_: <Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>) -> Map<StreamFuture<Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>>, fn(_: (Option<Result<U, Error>>, Pin<Box<<Self::Output as LoadQuery<'query, Conn, U>>::Stream<'conn>>>)) -> Result<U, Error>>>
where U: Send + 'conn, Conn: AsyncConnection, Self: LimitDsl, Self::Output: LoadQuery<'query, Conn, U> + Send + 'query,

Attempts to load a single record. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<Source> Sculptor<HNil, HNil> for Source

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type Remainder = Source

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fn sculpt(self) -> (HNil, <Source as Sculptor<HNil, HNil>>::Remainder)

Consumes the current HList and returns an HList with the requested shape. Read more
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impl<T> Tap for T

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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fn tap_borrow_mut<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Mutable access to the BorrowMut<B> of a value. Read more
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fn tap_ref<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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fn tap_ref_mut<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Mutable access to the AsMut<R> view of a value. Read more
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fn tap_deref<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Immutable access to the Deref::Target of a value. Read more
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fn tap_deref_mut<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Mutable access to the Deref::Target of a value. Read more
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fn tap_dbg(self, func: impl FnOnce(&Self)) -> Self

Calls .tap() only in debug builds, and is erased in release builds.
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fn tap_mut_dbg(self, func: impl FnOnce(&mut Self)) -> Self

Calls .tap_mut() only in debug builds, and is erased in release builds.
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fn tap_borrow_dbg<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

Calls .tap_borrow() only in debug builds, and is erased in release builds.
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fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
where Self: BorrowMut<B>, B: ?Sized,

Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
where Self: AsRef<R>, R: ?Sized,

Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> TryConv for T

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fn try_conv<T>(self) -> Result<T, Self::Error>
where Self: TryInto<T>,

Attempts to convert self into T using TryInto<T>. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T, U> Upcast<T> for U
where T: UpcastFrom<U>,

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fn upcast(self) -> T

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impl<T, B> UpcastFrom<Counter<T, B>> for T

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fn upcast_from(value: Counter<T, B>) -> T

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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,