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