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//! Invalid format description
use alloc::string::String;
use core::fmt;
use crate::error;
/// The format description provided was not valid.
#[non_exhaustive]
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum InvalidFormatDescription {
/// There was a bracket pair that was opened but not closed.
#[non_exhaustive]
UnclosedOpeningBracket {
/// The zero-based index of the opening bracket.
index: usize,
},
/// A component name is not valid.
#[non_exhaustive]
InvalidComponentName {
/// The name of the invalid component name.
name: String,
/// The zero-based index the component name starts at.
index: usize,
},
/// A modifier is not valid.
#[non_exhaustive]
InvalidModifier {
/// The value of the invalid modifier.
value: String,
/// The zero-based index the modifier starts at.
index: usize,
},
/// A component name is missing.
#[non_exhaustive]
MissingComponentName {
/// The zero-based index where the component name should start.
index: usize,
},
/// A required modifier is missing.
#[non_exhaustive]
MissingRequiredModifier {
/// The name of the modifier that is missing.
name: &'static str,
/// The zero-based index of the component.
index: usize,
},
/// Something was expected, but not found.
#[non_exhaustive]
Expected {
/// What was expected to be present, but wasn't.
what: &'static str,
/// The zero-based index the item was expected to be found at.
index: usize,
},
/// Certain behavior is not supported in the given context.
#[non_exhaustive]
NotSupported {
/// The behavior that is not supported.
what: &'static str,
/// The context in which the behavior is not supported.
context: &'static str,
/// The zero-based index the error occurred at.
index: usize,
},
}
impl From<InvalidFormatDescription> for crate::Error {
fn from(original: InvalidFormatDescription) -> Self {
Self::InvalidFormatDescription(original)
}
}
impl TryFrom<crate::Error> for InvalidFormatDescription {
type Error = error::DifferentVariant;
fn try_from(err: crate::Error) -> Result<Self, Self::Error> {
match err {
crate::Error::InvalidFormatDescription(err) => Ok(err),
_ => Err(error::DifferentVariant),
}
}
}
impl fmt::Display for InvalidFormatDescription {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
use InvalidFormatDescription::*;
match self {
UnclosedOpeningBracket { index } => {
write!(f, "unclosed opening bracket at byte index {index}")
}
InvalidComponentName { name, index } => {
write!(f, "invalid component name `{name}` at byte index {index}")
}
InvalidModifier { value, index } => {
write!(f, "invalid modifier `{value}` at byte index {index}")
}
MissingComponentName { index } => {
write!(f, "missing component name at byte index {index}")
}
MissingRequiredModifier { name, index } => {
write!(
f,
"missing required modifier `{name}` for component at byte index {index}"
)
}
Expected {
what: expected,
index,
} => {
write!(f, "expected {expected} at byte index {index}")
}
NotSupported {
what,
context,
index,
} => {
write!(
f,
"{what} is not supported in {context} at byte index {index}"
)
}
}
}
}
#[cfg(feature = "std")]
impl std::error::Error for InvalidFormatDescription {}