fn parse(text: &str) -> Result<(Name, ArgumentIterator), Error> {
        let text = text.trim_end_matches(|c: char| c.is_ascii_control() || c.is_ascii_whitespace());
        if text.is_empty() {
            return Err(Error::CommandEmpty);
        }
        if !text.chars().all(|c| c.is_ascii_alphanumeric() || ALLOWED_TOKENS.contains(c)) {
            return Err(Error::CharactersNotAllowed);
        }

        let mut tokens = text.split_whitespace();
        // Ensure no bad formatting
        let badly_formatted = tokens.clone().any(|token| {
            token.chars().filter(|c| *c == ARGUMENT_SEPARATOR).count() > 1
                || token.starts_with(ARGUMENT_SEPARATOR)
                || token.ends_with(ARGUMENT_SEPARATOR)
        });

        if badly_formatted {
            return Err(Error::MalformedArguments);
        }
        let name = tokens.next().ok_or(Error::CommandEmpty)?;
        let arguments = ArgumentIterator { tokens };
        let unique = arguments
            .clone()
            .map(|arg| match arg {
                Argument::Pair(n, _) => n,
                Argument::Single(n) => n,
            })
            .all_unique();

        if !unique {
            return Err(Error::DuplicateArguments);
        }

        Ok((name, arguments))
    }
/// Attempts to parse a given string into a command name and arguments.
Attempts to parse a given string into a command name and arguments.
Attempts to parse a given string into a command name and arguments .
fn parse(text: &str) -> Result<(Name, ArgumentIterator), Error> {
        let text = text.trim_end_matches(|c: char| c.is_ascii_control() || c.is_ascii_whitespace());
        if text.is_empty() {
            return Err(Error::CommandEmpty);
        }
        if !text.chars().all(|c| c.is_ascii_alphanumeric() || ALLOWED_TOKENS.contains(c)) {
            return Err(Error::CharactersNotAllowed);
        }
        let mut tokens = text.split_whitespace();
        // Ensure no bad formatting
        let badly_formatted = tokens.clone().any(|token| {
            token.chars().filter(|c| *c == ARGUMENT_SEPARATOR).count() > 1
                || token.starts_with(ARGUMENT_SEPARATOR)
                || token.ends_with(ARGUMENT_SEPARATOR)
        });
        if badly_formatted {
            return Err(Error::MalformedArguments);
        }
        let name = tokens.next().ok_or(Error::CommandEmpty)?;
        let arguments = ArgumentIterator { tokens };
        let unique = arguments
            .clone()
            .map(|arg| match arg {
                Argument::Pair(n, _) => n,
                Argument::Single(n) => n,
            })
            .all_unique();
        if !unique {
            return Err(Error::DuplicateArguments);
        }
        Ok((name, arguments))
    }
fn parse ( text : & str ) -> Result < ( Name , ArgumentIterator ) , Error > { let text = text . trim_end_matches ( | c : char | c . is_ascii_control ( ) || c . is_ascii_whitespace ( ) ) ; if text . is_empty ( ) { return Err ( Error :: CommandEmpty ) ; } if ! text . chars ( ) . all ( | c | c . is_ascii_alphanumeric ( ) || ALLOWED_TOKENS . contains ( c ) ) { return Err ( Error :: CharactersNotAllowed ) ; } let mut tokens = text . split_whitespace ( ) ; // Ensure no bad formatting let badly_formatted = tokens . clone ( ) . any ( | token | { token . chars ( ) . filter ( | c | * c == ARGUMENT_SEPARATOR ) . count ( ) > 1 || token . starts_with ( ARGUMENT_SEPARATOR ) || token . ends_with ( ARGUMENT_SEPARATOR ) } ) ; if badly_formatted { return Err ( Error :: MalformedArguments ) ; } let name = tokens . next ( ) . ok_or ( Error :: CommandEmpty ) ? ; let arguments = ArgumentIterator { tokens } ; let unique = arguments . clone ( ) . map ( | arg | match arg { Argument :: Pair ( n , _ ) => n , Argument :: Single ( n ) => n , } ) . all_unique ( ) ; if ! unique { return Err ( Error :: DuplicateArguments ) ; } Ok ( ( name , arguments ) ) }
Attempts to parse a given string into a command name and arguments.
Attempts to parse a given string into a command name and arguments .
text
&str
text
&str