fn parse_spec(spec: &str) -> (Vec<Directive>, Option<inner::Filter>) {
    let mut dirs = Vec::new();

    let mut parts = spec.split('/');
    let mods = parts.next();
    let filter = parts.next();
    if parts.next().is_some() {
        eprintln!(
            "warning: invalid logging spec '{}', \
             ignoring it (too many '/'s)",
            spec
        );
        return (dirs, None);
    }
    if let Some(m) = mods {
        for s in m.split(',').map(|ss| ss.trim()) {
            if s.is_empty() {
                continue;
            }
            let mut parts = s.split('=');
            let (log_level, name) =
                match (parts.next(), parts.next().map(|s| s.trim()), parts.next()) {
                    (Some(part0), None, None) => {
                        // if the single argument is a log-level string or number,
                        // treat that as a global fallback
                        match part0.parse() {
                            Ok(num) => (num, None),
                            Err(_) => (LevelFilter::max(), Some(part0)),
                        }
                    }
                    (Some(part0), Some(""), None) => (LevelFilter::max(), Some(part0)),
                    (Some(part0), Some(part1), None) => match part1.parse() {
                        Ok(num) => (num, Some(part0)),
                        _ => {
                            eprintln!(
                                "warning: invalid logging spec '{}', \
                                 ignoring it",
                                part1
                            );
                            continue;
                        }
                    },
                    _ => {
                        eprintln!(
                            "warning: invalid logging spec '{}', \
                             ignoring it",
                            s
                        );
                        continue;
                    }
                };
            dirs.push(Directive {
                name: name.map(|s| s.to_string()),
                level: log_level,
            });
        }
    }

    let filter = filter.and_then(|filter| match inner::Filter::new(filter) {
        Ok(re) => Some(re),
        Err(e) => {
            eprintln!("warning: invalid regex filter - {}", e);
            None
        }
    });

    (dirs, filter)
}
/// Parse a logging specification string (e.g: "crate1,crate2::mod3,crate3::x=error/foo")
/// and return a vector with log directives.
Parse a logging specification string
and return a vector with log directives.
Parse a logging specification string and return a vector with log directives .
fn parse_spec(spec: &str) -> (Vec<Directive>, Option<inner::Filter>) {
    let mut dirs = Vec::new();
    let mut parts = spec.split('/');
    let mods = parts.next();
    let filter = parts.next();
    if parts.next().is_some() {
        eprintln!(
            "warning: invalid logging spec '{}', \
             ignoring it (too many '/'s)",
            spec
        );
        return (dirs, None);
    }
    if let Some(m) = mods {
        for s in m.split(',').map(|ss| ss.trim()) {
            if s.is_empty() {
                continue;
            }
            let mut parts = s.split('=');
            let (log_level, name) =
                match (parts.next(), parts.next().map(|s| s.trim()), parts.next()) {
                    (Some(part0), None, None) => {
                        // if the single argument is a log-level string or number,
                        // treat that as a global fallback
                        match part0.parse() {
                            Ok(num) => (num, None),
                            Err(_) => (LevelFilter::max(), Some(part0)),
                        }
                    }
                    (Some(part0), Some(""), None) => (LevelFilter::max(), Some(part0)),
                    (Some(part0), Some(part1), None) => match part1.parse() {
                        Ok(num) => (num, Some(part0)),
                        _ => {
                            eprintln!(
                                "warning: invalid logging spec '{}', \
                                 ignoring it",
                                part1
                            );
                            continue;
                        }
                    },
                    _ => {
                        eprintln!(
                            "warning: invalid logging spec '{}', \
                             ignoring it",
                            s
                        );
                        continue;
                    }
                };
            dirs.push(Directive {
                name: name.map(|s| s.to_string()),
                level: log_level,
            });
        }
    }
    let filter = filter.and_then(|filter| match inner::Filter::new(filter) {
        Ok(re) => Some(re),
        Err(e) => {
            eprintln!("warning: invalid regex filter - {}", e);
            None
        }
    });
    (dirs, filter)
}
fn parse_spec ( spec : & str ) -> ( Vec < Directive > , Option < inner :: Filter > ) { let mut dirs = Vec :: new ( ) ; let mut parts = spec . split ( '/' ) ; let mods = parts . next ( ) ; let filter = parts . next ( ) ; if parts . next ( ) . is_some ( ) { eprintln ! ( " \
 " spec ) ; return ( dirs , None ) ; } if let Some ( m ) = mods { for s in m . split ( ',' ) . map ( | ss | ss . trim ( ) ) { if s . is_empty ( ) { continue ; } let mut parts = s . split ( '=' ) ; let ( log_level , name ) = match ( parts . next ( ) , parts . next ( ) . map ( | s | s . trim ( ) ) , parts . next ( ) ) { ( Some ( part0 ) , None , None ) => { // if the single argument is a log-level string or number, // treat that as a global fallback match part0 . parse ( ) { Ok ( num ) => ( num , None ) , Err ( _ ) => ( LevelFilter :: max ( ) , Some ( part0 ) ) , } } ( Some ( part0 ) , Some ( " " ) , None ) => ( LevelFilter :: max ( ) , Some ( part0 ) ) , ( Some ( part0 ) , Some ( part1 ) , None ) => match part1 . parse ( ) { Ok ( num ) => ( num , Some ( part0 ) ) , _ => { eprintln ! ( " \
 " part1 ) ; continue ; } } , _ => { eprintln ! ( " \
 " s ) ; continue ; } } ; dirs . push ( Directive { name : name . map ( | s | s . to_string ( ) ) , level : log_level , } ) ; } } let filter = filter . and_then ( | filter | match inner :: Filter :: new ( filter ) { Ok ( re ) => Some ( re ) , Err ( e ) => { eprintln ! ( " " e ) ; None } } ) ; ( dirs , filter ) }
Parse a logging specification string (e.g: "crate1,crate2::mod3,crate3::x=error/foo")
and return a vector with log directives.
Parse a logging specification string ( e . g : " crate1 crate2 :: mod3 crate3 :: x = error / foo " ) and return a vector with log directives .
spec
&str
spec
&str