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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use deno_core::anyhow::bail;
use deno_core::error::AnyError;
use monch::ParseError;
use monch::ParseErrorFailure;
use monch::ParseResult;
pub fn with_failure_handling<'a, T>(
combinator: impl Fn(&'a str) -> ParseResult<T>,
) -> impl Fn(&'a str) -> Result<T, AnyError> {
move |input| match combinator(input) {
Ok((input, result)) => {
if !input.is_empty() {
error_for_failure(fail_for_trailing_input(input))
} else {
Ok(result)
}
}
Err(ParseError::Backtrace) => {
error_for_failure(fail_for_trailing_input(input))
}
Err(ParseError::Failure(e)) => error_for_failure(e),
}
}
fn error_for_failure<T>(e: ParseErrorFailure) -> Result<T, AnyError> {
bail!(
"{}\n {}\n ~",
e.message,
// truncate the output to prevent wrapping in the console
e.input.chars().take(60).collect::<String>()
)
}
fn fail_for_trailing_input(input: &str) -> ParseErrorFailure {
ParseErrorFailure::new(input, "Unexpected character.")
}
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