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/// Error returned by the derived [`TryUnwrap`] implementation.
///
/// [`TryUnwrap`]: macro@crate::TryUnwrap
#[derive(Clone, Copy, Debug, PartialEq)]
pub struct TryUnwrapError<T> {
/// Original input value which failed to convert via the derived
/// [`TryUnwrap`] implementation.
///
/// [`TryUnwrap`]: macro@crate::TryUnwrap
pub input: T,
enum_name: &'static str,
variant_name: &'static str,
func_name: &'static str,
}
impl<T> TryUnwrapError<T> {
#[doc(hidden)]
#[must_use]
#[inline]
pub const fn new(
input: T,
enum_name: &'static str,
variant_name: &'static str,
func_name: &'static str,
) -> Self {
Self {
input,
enum_name,
variant_name,
func_name,
}
}
}
impl<T> core::fmt::Display for TryUnwrapError<T> {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
write!(
f,
"Attempt to call `{enum_name}::{func_name}()` on a `{enum_name}::{variant_name}` value",
enum_name = self.enum_name,
variant_name = self.variant_name,
func_name = self.func_name,
)
}
}
#[cfg(feature = "std")]
impl<T: core::fmt::Debug> std::error::Error for TryUnwrapError<T> {}
|
