Struct dialoguer::Input

source · 
pub struct Input<'a, T> { /* private fields */ }
Expand description

Renders an input prompt.

Example usage

use dialoguer::Input;

let input : String = Input::new()
    .with_prompt("Tea or coffee?")
    .with_initial_text("Yes")
    .default("No".into())
    .interact_text()?;

It can also be used with turbofish notation:

let input = Input::<String>::new()
    .interact_text()?;

Implementations§

source§

impl<T> Input<'_, T>

source

pub fn new() -> Self

Creates an input prompt.

source

pub fn with_prompt<S: Into<String>>(&mut self, prompt: S) -> &mut Self

Sets the input prompt.

Examples found in repository?
examples/completion.rs (line 7)
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fn main() -> Result<(), std::io::Error> {
    println!("Use the Right arrow or Tab to complete your command");
    let completion = MyCompletion::default();
    Input::<String>::with_theme(&ColorfulTheme::default())
        .with_prompt("dialoguer")
        .completion_with(&completion)
        .interact_text()?;
    Ok(())
}
More examples
Hide additional examples
examples/history.rs (line 14)
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fn main() {
    println!("Use 'exit' to quit the prompt");
    println!("In this example, history is limited to 4 entries");
    println!("Use the Up/Down arrows to scroll through history");
    println!();

    let mut history = MyHistory::default();

    loop {
        if let Ok(cmd) = Input::<String>::with_theme(&ColorfulTheme::default())
            .with_prompt("dialoguer")
            .history_with(&mut history)
            .interact_text()
        {
            if cmd == "exit" {
                process::exit(0);
            }
            println!("Entered {}", cmd);
        }
    }
}
examples/buffered.rs (line 21)
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fn main() {
    let items = &[
        "Ice Cream",
        "Vanilla Cupcake",
        "Chocolate Muffin",
        "A Pile of sweet, sweet mustard",
    ];
    let term = Term::buffered_stderr();
    let theme = ColorfulTheme::default();

    println!("All the following controls are run in a buffered terminal");
    Confirm::with_theme(&theme)
        .with_prompt("Do you want to continue?")
        .interact_on(&term)
        .unwrap();

    let _: String = Input::with_theme(&theme)
        .with_prompt("Your name")
        .interact_on(&term)
        .unwrap();

    Select::with_theme(&theme)
        .with_prompt("Pick an item")
        .items(items)
        .interact_on(&term)
        .unwrap();

    MultiSelect::with_theme(&theme)
        .with_prompt("Pick some items")
        .items(items)
        .interact_on(&term)
        .unwrap();

    Sort::with_theme(&theme)
        .with_prompt("Order these items")
        .items(items)
        .interact_on(&term)
        .unwrap();
}
examples/input.rs (line 5)
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fn main() {
    let input: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your name")
        .interact_text()
        .unwrap();

    println!("Hello {}!", input);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your email")
        .validate_with({
            let mut force = None;
            move |input: &String| -> Result<(), &str> {
                if input.contains('@') || force.as_ref().map_or(false, |old| old == input) {
                    Ok(())
                } else {
                    force = Some(input.clone());
                    Err("This is not a mail address; type the same value again to force use")
                }
            }
        })
        .interact_text()
        .unwrap();

    println!("Email: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your planet")
        .default("Earth".to_string())
        .interact_text()
        .unwrap();

    println!("Planet: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your galaxy")
        .with_initial_text("Milky Way".to_string())
        .interact_text()
        .unwrap();

    println!("Galaxy: {}", mail);
}
examples/wizard.rs (line 32)
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fn init_config() -> Result<Option<Config>, Box<dyn Error>> {
    let theme = ColorfulTheme {
        values_style: Style::new().yellow().dim(),
        ..ColorfulTheme::default()
    };
    println!("Welcome to the setup wizard");

    if !Confirm::with_theme(&theme)
        .with_prompt("Do you want to continue?")
        .interact()?
    {
        return Ok(None);
    }

    let interface = Input::with_theme(&theme)
        .with_prompt("Interface")
        .default("127.0.0.1".parse().unwrap())
        .interact()?;

    let hostname = Input::with_theme(&theme)
        .with_prompt("Hostname")
        .interact()?;

    let tls = Select::with_theme(&theme)
        .with_prompt("Configure TLS")
        .default(0)
        .item("automatic with ACME")
        .item("manual")
        .item("no")
        .interact()?;

    let (private_key, cert, use_acme) = match tls {
        0 => (Some("acme.pkey".into()), Some("acme.cert".into()), true),
        1 => (
            Some(
                Input::with_theme(&theme)
                    .with_prompt("  Path to private key")
                    .interact()?,
            ),
            Some(
                Input::with_theme(&theme)
                    .with_prompt("  Path to certificate")
                    .interact()?,
            ),
            false,
        ),
        _ => (None, None, false),
    };

    Ok(Some(Config {
        hostname,
        interface,
        private_key,
        cert,
        use_acme,
    }))
}
source

pub fn with_post_completion_text<S: Into<String>>( &mut self, post_completion_text: S ) -> &mut Self

Changes the prompt text to the post completion text after input is complete

source

pub fn report(&mut self, val: bool) -> &mut Self

Indicates whether to report the input value after interaction.

The default is to report the input value.

source

pub fn with_initial_text<S: Into<String>>(&mut self, val: S) -> &mut Self

Sets initial text that user can accept or erase.

Examples found in repository?
examples/input.rs (line 39)
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fn main() {
    let input: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your name")
        .interact_text()
        .unwrap();

    println!("Hello {}!", input);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your email")
        .validate_with({
            let mut force = None;
            move |input: &String| -> Result<(), &str> {
                if input.contains('@') || force.as_ref().map_or(false, |old| old == input) {
                    Ok(())
                } else {
                    force = Some(input.clone());
                    Err("This is not a mail address; type the same value again to force use")
                }
            }
        })
        .interact_text()
        .unwrap();

    println!("Email: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your planet")
        .default("Earth".to_string())
        .interact_text()
        .unwrap();

    println!("Planet: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your galaxy")
        .with_initial_text("Milky Way".to_string())
        .interact_text()
        .unwrap();

    println!("Galaxy: {}", mail);
}
source

pub fn default(&mut self, value: T) -> &mut Self

Sets a default.

Out of the box the prompt does not have a default and will continue to display until the user inputs something and hits enter. If a default is set the user can instead accept the default with enter.

Examples found in repository?
examples/input.rs (line 31)
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fn main() {
    let input: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your name")
        .interact_text()
        .unwrap();

    println!("Hello {}!", input);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your email")
        .validate_with({
            let mut force = None;
            move |input: &String| -> Result<(), &str> {
                if input.contains('@') || force.as_ref().map_or(false, |old| old == input) {
                    Ok(())
                } else {
                    force = Some(input.clone());
                    Err("This is not a mail address; type the same value again to force use")
                }
            }
        })
        .interact_text()
        .unwrap();

    println!("Email: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your planet")
        .default("Earth".to_string())
        .interact_text()
        .unwrap();

    println!("Planet: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your galaxy")
        .with_initial_text("Milky Way".to_string())
        .interact_text()
        .unwrap();

    println!("Galaxy: {}", mail);
}
More examples
Hide additional examples
examples/wizard.rs (line 33)
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fn init_config() -> Result<Option<Config>, Box<dyn Error>> {
    let theme = ColorfulTheme {
        values_style: Style::new().yellow().dim(),
        ..ColorfulTheme::default()
    };
    println!("Welcome to the setup wizard");

    if !Confirm::with_theme(&theme)
        .with_prompt("Do you want to continue?")
        .interact()?
    {
        return Ok(None);
    }

    let interface = Input::with_theme(&theme)
        .with_prompt("Interface")
        .default("127.0.0.1".parse().unwrap())
        .interact()?;

    let hostname = Input::with_theme(&theme)
        .with_prompt("Hostname")
        .interact()?;

    let tls = Select::with_theme(&theme)
        .with_prompt("Configure TLS")
        .default(0)
        .item("automatic with ACME")
        .item("manual")
        .item("no")
        .interact()?;

    let (private_key, cert, use_acme) = match tls {
        0 => (Some("acme.pkey".into()), Some("acme.cert".into()), true),
        1 => (
            Some(
                Input::with_theme(&theme)
                    .with_prompt("  Path to private key")
                    .interact()?,
            ),
            Some(
                Input::with_theme(&theme)
                    .with_prompt("  Path to certificate")
                    .interact()?,
            ),
            false,
        ),
        _ => (None, None, false),
    };

    Ok(Some(Config {
        hostname,
        interface,
        private_key,
        cert,
        use_acme,
    }))
}
source

pub fn allow_empty(&mut self, val: bool) -> &mut Self

Enables or disables an empty input

By default, if there is no default value set for the input, the user must input a non-empty string.

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pub fn show_default(&mut self, val: bool) -> &mut Self

Disables or enables the default value display.

The default behaviour is to append default to the prompt to tell the user what is the default value.

This method does not affect existence of default value, only its display in the prompt!

source§

impl<'a, T> Input<'a, T>

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pub fn with_theme(theme: &'a dyn Theme) -> Self

Creates an input prompt with a specific theme.

Examples found in repository?
examples/completion.rs (line 6)
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fn main() -> Result<(), std::io::Error> {
    println!("Use the Right arrow or Tab to complete your command");
    let completion = MyCompletion::default();
    Input::<String>::with_theme(&ColorfulTheme::default())
        .with_prompt("dialoguer")
        .completion_with(&completion)
        .interact_text()?;
    Ok(())
}
More examples
Hide additional examples
examples/history.rs (line 13)
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fn main() {
    println!("Use 'exit' to quit the prompt");
    println!("In this example, history is limited to 4 entries");
    println!("Use the Up/Down arrows to scroll through history");
    println!();

    let mut history = MyHistory::default();

    loop {
        if let Ok(cmd) = Input::<String>::with_theme(&ColorfulTheme::default())
            .with_prompt("dialoguer")
            .history_with(&mut history)
            .interact_text()
        {
            if cmd == "exit" {
                process::exit(0);
            }
            println!("Entered {}", cmd);
        }
    }
}
examples/buffered.rs (line 20)
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fn main() {
    let items = &[
        "Ice Cream",
        "Vanilla Cupcake",
        "Chocolate Muffin",
        "A Pile of sweet, sweet mustard",
    ];
    let term = Term::buffered_stderr();
    let theme = ColorfulTheme::default();

    println!("All the following controls are run in a buffered terminal");
    Confirm::with_theme(&theme)
        .with_prompt("Do you want to continue?")
        .interact_on(&term)
        .unwrap();

    let _: String = Input::with_theme(&theme)
        .with_prompt("Your name")
        .interact_on(&term)
        .unwrap();

    Select::with_theme(&theme)
        .with_prompt("Pick an item")
        .items(items)
        .interact_on(&term)
        .unwrap();

    MultiSelect::with_theme(&theme)
        .with_prompt("Pick some items")
        .items(items)
        .interact_on(&term)
        .unwrap();

    Sort::with_theme(&theme)
        .with_prompt("Order these items")
        .items(items)
        .interact_on(&term)
        .unwrap();
}
examples/input.rs (line 4)
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fn main() {
    let input: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your name")
        .interact_text()
        .unwrap();

    println!("Hello {}!", input);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your email")
        .validate_with({
            let mut force = None;
            move |input: &String| -> Result<(), &str> {
                if input.contains('@') || force.as_ref().map_or(false, |old| old == input) {
                    Ok(())
                } else {
                    force = Some(input.clone());
                    Err("This is not a mail address; type the same value again to force use")
                }
            }
        })
        .interact_text()
        .unwrap();

    println!("Email: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your planet")
        .default("Earth".to_string())
        .interact_text()
        .unwrap();

    println!("Planet: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your galaxy")
        .with_initial_text("Milky Way".to_string())
        .interact_text()
        .unwrap();

    println!("Galaxy: {}", mail);
}
examples/wizard.rs (line 31)
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fn init_config() -> Result<Option<Config>, Box<dyn Error>> {
    let theme = ColorfulTheme {
        values_style: Style::new().yellow().dim(),
        ..ColorfulTheme::default()
    };
    println!("Welcome to the setup wizard");

    if !Confirm::with_theme(&theme)
        .with_prompt("Do you want to continue?")
        .interact()?
    {
        return Ok(None);
    }

    let interface = Input::with_theme(&theme)
        .with_prompt("Interface")
        .default("127.0.0.1".parse().unwrap())
        .interact()?;

    let hostname = Input::with_theme(&theme)
        .with_prompt("Hostname")
        .interact()?;

    let tls = Select::with_theme(&theme)
        .with_prompt("Configure TLS")
        .default(0)
        .item("automatic with ACME")
        .item("manual")
        .item("no")
        .interact()?;

    let (private_key, cert, use_acme) = match tls {
        0 => (Some("acme.pkey".into()), Some("acme.cert".into()), true),
        1 => (
            Some(
                Input::with_theme(&theme)
                    .with_prompt("  Path to private key")
                    .interact()?,
            ),
            Some(
                Input::with_theme(&theme)
                    .with_prompt("  Path to certificate")
                    .interact()?,
            ),
            false,
        ),
        _ => (None, None, false),
    };

    Ok(Some(Config {
        hostname,
        interface,
        private_key,
        cert,
        use_acme,
    }))
}
source

pub fn history_with<H>(&mut self, history: &'a mut H) -> &mut Selfwhere H: History<T>,

Enable history processing

Example
let mut history = MyHistory::default();
loop {
    if let Ok(input) = Input::<String>::new()
        .with_prompt("hist")
        .history_with(&mut history)
        .interact_text()
    {
        // Do something with the input
    }
}
Examples found in repository?
examples/history.rs (line 15)
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fn main() {
    println!("Use 'exit' to quit the prompt");
    println!("In this example, history is limited to 4 entries");
    println!("Use the Up/Down arrows to scroll through history");
    println!();

    let mut history = MyHistory::default();

    loop {
        if let Ok(cmd) = Input::<String>::with_theme(&ColorfulTheme::default())
            .with_prompt("dialoguer")
            .history_with(&mut history)
            .interact_text()
        {
            if cmd == "exit" {
                process::exit(0);
            }
            println!("Entered {}", cmd);
        }
    }
}
source

pub fn completion_with<C>(&mut self, completion: &'a C) -> &mut Selfwhere C: Completion,

Enable completion

Examples found in repository?
examples/completion.rs (line 8)
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fn main() -> Result<(), std::io::Error> {
    println!("Use the Right arrow or Tab to complete your command");
    let completion = MyCompletion::default();
    Input::<String>::with_theme(&ColorfulTheme::default())
        .with_prompt("dialoguer")
        .completion_with(&completion)
        .interact_text()?;
    Ok(())
}
source§

impl<'a, T> Input<'a, T>where T: 'a,

source

pub fn validate_with<V>(&mut self, validator: V) -> &mut Selfwhere V: Validator<T> + 'a, V::Err: ToString,

Registers a validator.

Example
let mail: String = Input::new()
    .with_prompt("Enter email")
    .validate_with(|input: &String| -> Result<(), &str> {
        if input.contains('@') {
            Ok(())
        } else {
            Err("This is not a mail address")
        }
    })
    .interact()
    .unwrap();
Examples found in repository?
examples/input.rs (lines 13-23)
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fn main() {
    let input: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your name")
        .interact_text()
        .unwrap();

    println!("Hello {}!", input);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your email")
        .validate_with({
            let mut force = None;
            move |input: &String| -> Result<(), &str> {
                if input.contains('@') || force.as_ref().map_or(false, |old| old == input) {
                    Ok(())
                } else {
                    force = Some(input.clone());
                    Err("This is not a mail address; type the same value again to force use")
                }
            }
        })
        .interact_text()
        .unwrap();

    println!("Email: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your planet")
        .default("Earth".to_string())
        .interact_text()
        .unwrap();

    println!("Planet: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your galaxy")
        .with_initial_text("Milky Way".to_string())
        .interact_text()
        .unwrap();

    println!("Galaxy: {}", mail);
}
source§

impl<T> Input<'_, T>where T: Clone + ToString + FromStr, <T as FromStr>::Err: Debug + ToString,

source

pub fn interact_text(&mut self) -> Result<T>

Enables the user to enter a printable ascii sequence and returns the result.

Its difference from interact is that it only allows ascii characters for string, while interact allows virtually any character to be used e.g arrow keys.

The dialog is rendered on stderr.

Examples found in repository?
examples/completion.rs (line 9)
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fn main() -> Result<(), std::io::Error> {
    println!("Use the Right arrow or Tab to complete your command");
    let completion = MyCompletion::default();
    Input::<String>::with_theme(&ColorfulTheme::default())
        .with_prompt("dialoguer")
        .completion_with(&completion)
        .interact_text()?;
    Ok(())
}
More examples
Hide additional examples
examples/history.rs (line 16)
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fn main() {
    println!("Use 'exit' to quit the prompt");
    println!("In this example, history is limited to 4 entries");
    println!("Use the Up/Down arrows to scroll through history");
    println!();

    let mut history = MyHistory::default();

    loop {
        if let Ok(cmd) = Input::<String>::with_theme(&ColorfulTheme::default())
            .with_prompt("dialoguer")
            .history_with(&mut history)
            .interact_text()
        {
            if cmd == "exit" {
                process::exit(0);
            }
            println!("Entered {}", cmd);
        }
    }
}
examples/input.rs (line 6)
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fn main() {
    let input: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your name")
        .interact_text()
        .unwrap();

    println!("Hello {}!", input);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your email")
        .validate_with({
            let mut force = None;
            move |input: &String| -> Result<(), &str> {
                if input.contains('@') || force.as_ref().map_or(false, |old| old == input) {
                    Ok(())
                } else {
                    force = Some(input.clone());
                    Err("This is not a mail address; type the same value again to force use")
                }
            }
        })
        .interact_text()
        .unwrap();

    println!("Email: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your planet")
        .default("Earth".to_string())
        .interact_text()
        .unwrap();

    println!("Planet: {}", mail);

    let mail: String = Input::with_theme(&ColorfulTheme::default())
        .with_prompt("Your galaxy")
        .with_initial_text("Milky Way".to_string())
        .interact_text()
        .unwrap();

    println!("Galaxy: {}", mail);
}
source

pub fn interact_text_on(&mut self, term: &Term) -> Result<T>

Like interact_text but allows a specific terminal to be set.

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impl<T> Input<'_, T>where T: Clone + ToString + FromStr, <T as FromStr>::Err: ToString,

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pub fn interact(&mut self) -> Result<T>

Enables user interaction and returns the result.

Allows any characters as input, including e.g arrow keys. Some of the keys might have undesired behavior. For more limited version, see interact_text.

If the user confirms the result is true, false otherwise. The dialog is rendered on stderr.

Examples found in repository?
examples/wizard.rs (line 34)
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fn init_config() -> Result<Option<Config>, Box<dyn Error>> {
    let theme = ColorfulTheme {
        values_style: Style::new().yellow().dim(),
        ..ColorfulTheme::default()
    };
    println!("Welcome to the setup wizard");

    if !Confirm::with_theme(&theme)
        .with_prompt("Do you want to continue?")
        .interact()?
    {
        return Ok(None);
    }

    let interface = Input::with_theme(&theme)
        .with_prompt("Interface")
        .default("127.0.0.1".parse().unwrap())
        .interact()?;

    let hostname = Input::with_theme(&theme)
        .with_prompt("Hostname")
        .interact()?;

    let tls = Select::with_theme(&theme)
        .with_prompt("Configure TLS")
        .default(0)
        .item("automatic with ACME")
        .item("manual")
        .item("no")
        .interact()?;

    let (private_key, cert, use_acme) = match tls {
        0 => (Some("acme.pkey".into()), Some("acme.cert".into()), true),
        1 => (
            Some(
                Input::with_theme(&theme)
                    .with_prompt("  Path to private key")
                    .interact()?,
            ),
            Some(
                Input::with_theme(&theme)
                    .with_prompt("  Path to certificate")
                    .interact()?,
            ),
            false,
        ),
        _ => (None, None, false),
    };

    Ok(Some(Config {
        hostname,
        interface,
        private_key,
        cert,
        use_acme,
    }))
}
source

pub fn interact_on(&mut self, term: &Term) -> Result<T>

Like interact but allows a specific terminal to be set.

Examples found in repository?
examples/buffered.rs (line 22)
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fn main() {
    let items = &[
        "Ice Cream",
        "Vanilla Cupcake",
        "Chocolate Muffin",
        "A Pile of sweet, sweet mustard",
    ];
    let term = Term::buffered_stderr();
    let theme = ColorfulTheme::default();

    println!("All the following controls are run in a buffered terminal");
    Confirm::with_theme(&theme)
        .with_prompt("Do you want to continue?")
        .interact_on(&term)
        .unwrap();

    let _: String = Input::with_theme(&theme)
        .with_prompt("Your name")
        .interact_on(&term)
        .unwrap();

    Select::with_theme(&theme)
        .with_prompt("Pick an item")
        .items(items)
        .interact_on(&term)
        .unwrap();

    MultiSelect::with_theme(&theme)
        .with_prompt("Pick some items")
        .items(items)
        .interact_on(&term)
        .unwrap();

    Sort::with_theme(&theme)
        .with_prompt("Order these items")
        .items(items)
        .interact_on(&term)
        .unwrap();
}

Trait Implementations§

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impl<T> Default for Input<'static, T>

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fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl<'a, T> !RefUnwindSafe for Input<'a, T>

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impl<'a, T> !Send for Input<'a, T>

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impl<'a, T> !Sync for Input<'a, T>

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impl<'a, T> Unpin for Input<'a, T>where T: Unpin,

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impl<'a, T> !UnwindSafe for Input<'a, T>

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

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 Twhere U: TryFrom<T>,

§

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

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.