fn expand_tilde<F>(source: &str, provider: F) -> Result<String, ArgumentError>
where
    F: FnOnce() -> Option<String>,
{
    if !source.contains('~') {
        Ok(source.to_string())
    } else {
        let mut expanded = String::new();
        let mut chars = source.chars().enumerate();

        let home = match provider() {
            Some(home) => home,
            None => "~".to_string(),
        };

        while let Some((start, c)) = chars.next() {
            match c {
                '\'' | '"' => {
                    if let Some((end, _)) = argv::find_with_previous(
                        &mut chars,
                        |o| {
                            if let Some((_, c)) = o {
                                *c != '\\'
                            } else {
                                true
                            }
                        },
                        |(_, current)| *current == c,
                    ) {
                        expanded.push_str(&source[start..end + 1]);
                    } else {
                        return Err(ArgumentError::UnterminatedSequence(c));
                    }
                }
                '\\' => match chars.next() {
                    Some((_, '~')) => expanded.push('~'),
                    Some((_, c)) => {
                        expanded.push('\\');
                        expanded.push(c);
                    }
                    None => return Err(ArgumentError::UnterminatedSequence('\\')),
                },
                '~' => expanded.push_str(home.as_str()),
                _ => expanded.push(c),
            }
        }

        Ok(expanded)
    }
}
/// Replace all non-quoted  and non-escaped tildes with the user's home
/// directory.The `provider` should be a simple method that returns the user's
/// home directory as a string, or None if the home directory could not be
/// determined. If the user's home directory could not be determined, the tilde
/// is not expanded and left as-is.
Replace all non-quoted  and non-escaped tildes with the user's home
directory.The `provider` should be a simple method that returns the user's
home directory as a string, or None if the home directory could not be
determined. If the user's home directory could not be determined, the tilde
is not expanded and left as-is.
Replace all non - quoted and non - escaped tildes with the user ' s home directory . The ` provider ` should be a simple method that returns the user ' s home directory as a string or None if the home directory could not be determined . If the user ' s home directory could not be determined the tilde is not expanded and left as - is .
fn expand_tilde<F>(source: &str, provider: F) -> Result<String, ArgumentError>
where
    F: FnOnce() -> Option<String>,
{
    if !source.contains('~') {
        Ok(source.to_string())
    } else {
        let mut expanded = String::new();
        let mut chars = source.chars().enumerate();
        let home = match provider() {
            Some(home) => home,
            None => "~".to_string(),
        };
        while let Some((start, c)) = chars.next() {
            match c {
                '\'' | '"' => {
                    if let Some((end, _)) = argv::find_with_previous(
                        &mut chars,
                        |o| {
                            if let Some((_, c)) = o {
                                *c != '\\'
                            } else {
                                true
                            }
                        },
                        |(_, current)| *current == c,
                    ) {
                        expanded.push_str(&source[start..end + 1]);
                    } else {
                        return Err(ArgumentError::UnterminatedSequence(c));
                    }
                }
                '\\' => match chars.next() {
                    Some((_, '~')) => expanded.push('~'),
                    Some((_, c)) => {
                        expanded.push('\\');
                        expanded.push(c);
                    }
                    None => return Err(ArgumentError::UnterminatedSequence('\\')),
                },
                '~' => expanded.push_str(home.as_str()),
                _ => expanded.push(c),
            }
        }
        Ok(expanded)
    }
}
fn expand_tilde < F > ( source : & str , provider : F ) -> Result < String , ArgumentError > where F : FnOnce ( ) -> Option < String > , { if ! source . contains ( '~' ) { Ok ( source . to_string ( ) ) } else { let mut expanded = String :: new ( ) ; let mut chars = source . chars ( ) . enumerate ( ) ; let home = match provider ( ) { Some ( home ) => home , None => " " . to_string ( ) , } ; while let Some ( ( start , c ) ) = chars . next ( ) { match c { '\'' | '"' => { if let Some ( ( end , _ ) ) = argv :: find_with_previous ( & mut chars , | o | { if let Some ( ( _ , c ) ) = o { * c != '\\' } else { true } } , | ( _ , current ) | * current == c , ) { expanded . push_str ( & source [ start .. end + 1 ] ) ; } else { return Err ( ArgumentError :: UnterminatedSequence ( c ) ) ; } } '\\' => match chars . next ( ) { Some ( ( _ , '~' ) ) => expanded . push ( '~' ) , Some ( ( _ , c ) ) => { expanded . push ( '\\' ) ; expanded . push ( c ) ; } None => return Err ( ArgumentError :: UnterminatedSequence ( '\\' ) ) , } , '~' => expanded . push_str ( home . as_str ( ) ) , _ => expanded . push ( c ) , } } Ok ( expanded ) } }
Replace all non-quoted  and non-escaped tildes with the user's home
directory.The `provider` should be a simple method that returns the user's
home directory as a string, or None if the home directory could not be
determined.
Replace all non - quoted and non - escaped tildes with the user ' s home directory . The ` provider ` should be a simple method that returns the user ' s home directory as a string or None if the home directory could not be determined .
source
&str
provider
F