Struct build_env::VarError

pub struct VarError<K: AsRef<OsStr>> { /* fields omitted */ }

Describes a variable retrieval failure

Trait Implementations

impl<K: Clone + AsRef<OsStr>> Clone for VarError<K>

fn clone(&self) -> VarError<K>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<K: Debug + AsRef<OsStr>> Debug for VarError<K>

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

Formats the value using the given formatter.

impl<K: AsRef<OsStr>> Display for VarError<K>

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

Formats the value using the given formatter.

impl<K: Eq + AsRef<OsStr>> Eq for VarError<K>

impl<K: AsRef<OsStr> + Debug + Any> Error for VarError<K>

fn description(&self) -> &str

👎 Deprecated since 1.42.0:

use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() { // Print e itself, no need for description(). eprintln!("Error: {}", e); }

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

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred.

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

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl<K: Ord + AsRef<OsStr>> Ord for VarError<K>

fn cmp(&self, other: &VarError<K>) -> Ordering

This method returns an [Ordering] between self and other.

#[must_use]fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use]fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use]fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl<K: PartialEq + AsRef<OsStr>> PartialEq<VarError<K>> for VarError<K>

fn eq(&self, other: &VarError<K>) -> bool

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

fn ne(&self, other: &VarError<K>) -> bool

This method tests for !=.

impl<K: PartialOrd + AsRef<OsStr>> PartialOrd<VarError<K>> for VarError<K>

fn partial_cmp(&self, other: &VarError<K>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &VarError<K>) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &VarError<K>) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &VarError<K>) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &VarError<K>) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl<K: AsRef<OsStr>> StructuralEq for VarError<K>

impl<K: AsRef<OsStr>> StructuralPartialEq for VarError<K>