fn tokenize(input: &str) -> Result<Vec<Token>, Error> {
    let mut chars = input.chars();
    let mut tokens = Vec::new();

    let mut buffer = String::new();

    loop {
        let ch = chars.next();

        // Check if we need to complete a token.
        if !buffer.is_empty() {
            match ch {
                Some(' ') | Some('"') | Some('[') | Some(']') | Some(',') | None => {
                    // Try to parse as number or bool first.
                    if let Ok(value) = i64::from_str(&buffer) {
                        tokens.push(Token::I64(value));
                    } else if let Ok(value) = bool::from_str(&buffer) {
                        tokens.push(Token::Boolean(value));
                    } else {
                        tokens.push(Token::String(buffer.clone()))
                    }

                    buffer.clear();
                }
                _ => {
                    // Handled in second match below.
                }
            }
        }

        match ch {
            None => {
                // On EOF, we break.
                break;
            }
            Some(' ') => {
                // Ignore whitespace.
            }
            Some('"') => {
                // Quoted string.
                let mut escaped = false;
                let mut string = String::new();
                loop {
                    let c = chars.next();
                    match c {
                        Some(character) if escaped => {
                            string.push(character);
                            escaped = false;
                        }
                        Some('\\') => {
                            escaped = true;
                        }
                        Some('"') => {
                            break;
                        }
                        Some(character) => string.push(character),
                        None => {
                            return Err(Error::UnterminatedString);
                        }
                    }
                }
                tokens.push(Token::String(string));
            }
            Some('[') => tokens.push(Token::OpenBracket),
            Some(']') => tokens.push(Token::CloseBracket),
            Some(',') => tokens.push(Token::Comma),
            Some(character) => buffer.push(character),
        }
    }

    Ok(tokens)
}
/// Tokenizes a stream of characters.
Tokenizes a stream of characters.
Tokenizes a stream of characters .
fn tokenize(input: &str) -> Result<Vec<Token>, Error> {
    let mut chars = input.chars();
    let mut tokens = Vec::new();
    let mut buffer = String::new();
    loop {
        let ch = chars.next();
        // Check if we need to complete a token.
        if !buffer.is_empty() {
            match ch {
                Some(' ') | Some('"') | Some('[') | Some(']') | Some(',') | None => {
                    // Try to parse as number or bool first.
                    if let Ok(value) = i64::from_str(&buffer) {
                        tokens.push(Token::I64(value));
                    } else if let Ok(value) = bool::from_str(&buffer) {
                        tokens.push(Token::Boolean(value));
                    } else {
                        tokens.push(Token::String(buffer.clone()))
                    }
                    buffer.clear();
                }
                _ => {
                    // Handled in second match below.
                }
            }
        }
        match ch {
            None => {
                // On EOF, we break.
                break;
            }
            Some(' ') => {
                // Ignore whitespace.
            }
            Some('"') => {
                // Quoted string.
                let mut escaped = false;
                let mut string = String::new();
                loop {
                    let c = chars.next();
                    match c {
                        Some(character) if escaped => {
                            string.push(character);
                            escaped = false;
                        }
                        Some('\\') => {
                            escaped = true;
                        }
                        Some('"') => {
                            break;
                        }
                        Some(character) => string.push(character),
                        None => {
                            return Err(Error::UnterminatedString);
                        }
                    }
                }
                tokens.push(Token::String(string));
            }
            Some('[') => tokens.push(Token::OpenBracket),
            Some(']') => tokens.push(Token::CloseBracket),
            Some(',') => tokens.push(Token::Comma),
            Some(character) => buffer.push(character),
        }
    }
    Ok(tokens)
}
fn tokenize ( input : & str ) -> Result < Vec < Token > , Error > { let mut chars = input . chars ( ) ; let mut tokens = Vec :: new ( ) ; let mut buffer = String :: new ( ) ; loop { let ch = chars . next ( ) ; // Check if we need to complete a token. if ! buffer . is_empty ( ) { match ch { Some ( ' ' ) | Some ( '"' ) | Some ( '[' ) | Some ( ']' ) | Some ( ',' ) | None => { // Try to parse as number or bool first. if let Ok ( value ) = i64 :: from_str ( & buffer ) { tokens . push ( Token :: I64 ( value ) ) ; } else if let Ok ( value ) = bool :: from_str ( & buffer ) { tokens . push ( Token :: Boolean ( value ) ) ; } else { tokens . push ( Token :: String ( buffer . clone ( ) ) ) } buffer . clear ( ) ; } _ => { // Handled in second match below. } } } match ch { None => { // On EOF, we break. break ; } Some ( ' ' ) => { // Ignore whitespace. } Some ( '"' ) => { // Quoted string. let mut escaped = false ; let mut string = String :: new ( ) ; loop { let c = chars . next ( ) ; match c { Some ( character ) if escaped => { string . push ( character ) ; escaped = false ; } Some ( '\\' ) => { escaped = true ; } Some ( '"' ) => { break ; } Some ( character ) => string . push ( character ) , None => { return Err ( Error :: UnterminatedString ) ; } } } tokens . push ( Token :: String ( string ) ) ; } Some ( '[' ) => tokens . push ( Token :: OpenBracket ) , Some ( ']' ) => tokens . push ( Token :: CloseBracket ) , Some ( ',' ) => tokens . push ( Token :: Comma ) , Some ( character ) => buffer . push ( character ) , } } Ok ( tokens ) }
Tokenizes a stream of characters.
Tokenizes a stream of characters .
input
&str
input
&str