fn format_snippet(snippet: &str, config: &Config, is_macro_def: bool) -> Option<FormattedSnippet> {
    let mut config = config.clone();
    panic::catch_unwind(|| {
        let mut out: Vec<u8> = Vec::with_capacity(snippet.len() * 2);
        config.set().emit_mode(config::EmitMode::Stdout);
        config.set().verbose(Verbosity::Quiet);
        config.set().hide_parse_errors(true);
        if is_macro_def {
            config.set().error_on_unformatted(true);
        }

        let (formatting_error, result) = {
            let input = Input::Text(snippet.into());
            let mut session = Session::new(config, Some(&mut out));
            let result = session.format_input_inner(input, is_macro_def);
            (
                session.errors.has_macro_format_failure
                    || session.out.as_ref().unwrap().is_empty() && !snippet.is_empty()
                    || result.is_err()
                    || (is_macro_def && session.has_unformatted_code_errors()),
                result,
            )
        };
        if formatting_error {
            None
        } else {
            String::from_utf8(out).ok().map(|snippet| FormattedSnippet {
                snippet,
                non_formatted_ranges: result.unwrap().non_formatted_ranges,
            })
        }
    })
    // Discard panics encountered while formatting the snippet
    // The ? operator is needed to remove the extra Option
    .ok()?
}
/// Format the given snippet. The snippet is expected to be *complete* code.
/// When we cannot parse the given snippet, this function returns `None`.
Format the given snippet. The snippet is expected to be *complete* code.
When we cannot parse the given snippet, this function returns `None`.
Format the given snippet . The snippet is expected to be * complete * code . When we cannot parse the given snippet this function returns ` None ` .
fn format_snippet(snippet: &str, config: &Config, is_macro_def: bool) -> Option<FormattedSnippet> {
    let mut config = config.clone();
    panic::catch_unwind(|| {
        let mut out: Vec<u8> = Vec::with_capacity(snippet.len() * 2);
        config.set().emit_mode(config::EmitMode::Stdout);
        config.set().verbose(Verbosity::Quiet);
        config.set().hide_parse_errors(true);
        if is_macro_def {
            config.set().error_on_unformatted(true);
        }
        let (formatting_error, result) = {
            let input = Input::Text(snippet.into());
            let mut session = Session::new(config, Some(&mut out));
            let result = session.format_input_inner(input, is_macro_def);
            (
                session.errors.has_macro_format_failure
                    || session.out.as_ref().unwrap().is_empty() && !snippet.is_empty()
                    || result.is_err()
                    || (is_macro_def && session.has_unformatted_code_errors()),
                result,
            )
        };
        if formatting_error {
            None
        } else {
            String::from_utf8(out).ok().map(|snippet| FormattedSnippet {
                snippet,
                non_formatted_ranges: result.unwrap().non_formatted_ranges,
            })
        }
    })
    // Discard panics encountered while formatting the snippet
    // The ? operator is needed to remove the extra Option
    .ok()?
}
fn format_snippet ( snippet : & str , config : & Config , is_macro_def : bool ) -> Option < FormattedSnippet > { let mut config = config . clone ( ) ; panic :: catch_unwind ( | | { let mut out : Vec < u8 > = Vec :: with_capacity ( snippet . len ( ) * 2 ) ; config . set ( ) . emit_mode ( config :: EmitMode :: Stdout ) ; config . set ( ) . verbose ( Verbosity :: Quiet ) ; config . set ( ) . hide_parse_errors ( true ) ; if is_macro_def { config . set ( ) . error_on_unformatted ( true ) ; } let ( formatting_error , result ) = { let input = Input :: Text ( snippet . into ( ) ) ; let mut session = Session :: new ( config , Some ( & mut out ) ) ; let result = session . format_input_inner ( input , is_macro_def ) ; ( session . errors . has_macro_format_failure || session . out . as_ref ( ) . unwrap ( ) . is_empty ( ) && ! snippet . is_empty ( ) || result . is_err ( ) || ( is_macro_def && session . has_unformatted_code_errors ( ) ) , result , ) } ; if formatting_error { None } else { String :: from_utf8 ( out ) . ok ( ) . map ( | snippet | FormattedSnippet { snippet , non_formatted_ranges : result . unwrap ( ) . non_formatted_ranges , } ) } } ) // Discard panics encountered while formatting the snippet // The ? operator is needed to remove the extra Option . ok ( ) ? }
Format the given snippet.
Format the given snippet .
snippet
&str
config
&Config
is_macro_def
bool
snippet
&str
config
&Config
is_macro_def
bool