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use std::io;
use thiserror::Error;
#[derive(Debug, Error)]
#[non_exhaustive]
pub enum IOError {
#[error("error reading treebank")]
IO(#[from] io::Error),
#[error(transparent)]
Parse(#[from] ParseError),
}
#[derive(Debug, Error, Eq, PartialEq)]
#[non_exhaustive]
pub enum ParseError {
#[error("form field is missing")]
MissingFormField,
#[error("cannot parse feature field: {value:?}")]
IncorrectFeatureField { value: String },
#[error("cannot parse as integer field: {value:?}")]
ParseIntField { value: String },
#[error("cannot parse as identifier field: {value:?})")]
ParseIdentifierField { value: String },
}
#[derive(Debug, Error)]
#[non_exhaustive]
pub enum GraphError {
#[error("incomplete graph: {value:?}")]
IncompleteGraph { value: String },
}