Enum AppPathError

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pub enum AppPathError {
    ExecutableNotFound(String),
    InvalidExecutablePath(String),
}
Expand description

Error type for AppPath operations.

This enum represents the possible failures that can occur when determining the executable location. These errors are rare in practice and typically indicate fundamental system issues.

§When These Errors Occur

  • ExecutableNotFound: When std::env::current_exe() fails

    • Very rare, but can happen in some embedded or heavily sandboxed environments
    • May occur if the executable has been deleted while running
    • Can happen in some containerized environments with unusual configurations
  • InvalidExecutablePath: When the executable path is empty

    • Extremely rare, indicates a corrupted or broken system
    • May occur with custom or non-standard program loaders

These errors represent system-level failures that are typically unrecoverable for portable applications. Most applications should use the infallible API (new(), exe_dir()) and handle these rare cases through environment variables or fallback strategies.

§Examples

use app_path::{AppPath, AppPathError};

// Handle errors explicitly
match AppPath::try_new("config.toml") {
    Ok(config) => {
        println!("Config path: {}", config.path().display());
    }
    Err(AppPathError::ExecutableNotFound(msg)) => {
        eprintln!("Cannot find executable: {}", msg);
        // Fallback to alternative configuration
    }
    Err(AppPathError::InvalidExecutablePath(msg)) => {
        eprintln!("Invalid executable path: {}", msg);
        // Fallback to alternative configuration
    }
}

Variants§

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ExecutableNotFound(String)

Failed to determine the current executable path.

This error occurs when std::env::current_exe() fails, which is rare but can happen in some embedded or heavily sandboxed environments.

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InvalidExecutablePath(String)

Executable path is empty or invalid.

This error occurs when the system returns an empty executable path, which is extremely rare and indicates a corrupted or broken system.

Trait Implementations§

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impl Clone for AppPathError

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fn clone(&self) -> AppPathError

Returns a duplicate 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 AppPathError

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

Formats the value using the given formatter. Read more
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impl Display for AppPathError

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

Formats the value using the given formatter. Read more
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impl Error for AppPathError

1.30.0 · Source§

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any. Read more
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fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()
1.0.0 · Source§

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
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fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)
Provides type-based access to context intended for error reports. Read more
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impl PartialEq for AppPathError

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for AppPathError

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impl StructuralPartialEq for AppPathError

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where 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 T
where T: ?Sized,

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fn borrow(&self) -> &T

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

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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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> 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> ToString for T
where T: Display + ?Sized,

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fn to_string(&self) -> String

Converts the given value to a String. 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.