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use crate::{
repetition_parser::RepetitionParserRequirement,
Error,
};
use std::fmt::{
Debug,
Display,
Formatter,
Result as FmtResult,
};
#[derive(Debug)]
pub struct RepetitionParserError<'a, 'b, R, E>
where
R: Debug + Display,
E: Error<'a, 'b>,
{
from: usize,
requirement: RepetitionParserRequirement<'a, 'b, R>,
found: usize,
cause: E,
}
impl<'a, 'b, R, E> RepetitionParserError<'a, 'b, R, E>
where
R: Debug + Display,
E: Error<'a, 'b>,
{
pub fn new(
from: usize,
requirement: RepetitionParserRequirement<'a, 'b, R>,
found: usize,
cause: E,
) -> Self
{
Self {
from,
requirement,
found,
cause,
}
}
}
impl<'a, 'b, R, E> Error<'a, 'b> for RepetitionParserError<'a, 'b, R, E>
where
R: Debug + Display,
E: Error<'a, 'b>,
{
fn from(&self, f: &mut Formatter) -> FmtResult
{
write!(f, "{}", self.from)
}
fn requirement(&self, f: &mut Formatter) -> FmtResult
{
write!(f, "{}", self.requirement)
}
fn result(&self, f: &mut Formatter) -> FmtResult
{
write!(f, "succeed in parsing only {} time(s)", self.found)
}
fn causes(&self, f: &mut Formatter, depth: usize) -> FmtResult
{
self.cause.print(f, depth)
}
fn print(&self, f: &mut Formatter, depth: usize) -> FmtResult
{
for _ in 0..depth
{
write!(f, "\t")?;
}
write!(f, "at position ")?;
self.from(f)?;
write!(f, " required ")?;
self.requirement(f)?;
write!(f, " but ")?;
self.result(f)?;
write!(f, ".\n")?;
self.causes(f, depth + 1)
}
fn print_full(&self, f: &mut Formatter, depth: usize) -> FmtResult
{
self.print(f, depth)
}
}
impl<'a, 'b, R, E> Display for RepetitionParserError<'a, 'b, R, E>
where
R: Debug + Display,
E: Error<'a, 'b>,
{
fn fmt(&self, f: &mut Formatter) -> FmtResult
{
self.print(f, 0)
}
}