pub fn new() -> GridReader {
        fn cell_parser(token: &str) -> Result<Option<usize>, Box<StdError>> {
            match token {
                "?" | "_" | "-" | "." | "*" | "X" => Ok(None),
                _ => token.parse::<usize>().map(Some)
                                           .map_err(|err| Box::new(err) as Box<StdError>),
            }
        }
        GridReader {
            size_range: SizeRange::from(1..1025).0,
            cell_parser: Box::new(cell_parser),
        }
    }
/// Returns a new `GridReader` with reasonable defaults.
///
/// The `GridReader` will accept grids with a size of up to 1024, and expects filled cells
/// be represented as decimal numbers, while empty cells are represented as underscores,
/// question marks, or a few other characters.
Returns a new `GridReader` with reasonable defaults.
The `GridReader` will accept grids with a size of up to 1024, and expects filled cells
be represented as decimal numbers, while empty cells are represented as underscores,
question marks, or a few other characters.
Returns a new ` GridReader ` with reasonable defaults . The ` GridReader ` will accept grids with a size of up to 1024 and expects filled cells be represented as decimal numbers while empty cells are represented as underscores question marks or a few other characters .
pub fn new() -> GridReader {
        fn cell_parser(token: &str) -> Result<Option<usize>, Box<StdError>> {
            match token {
                "?" | "_" | "-" | "." | "*" | "X" => Ok(None),
                _ => token.parse::<usize>().map(Some)
                                           .map_err(|err| Box::new(err) as Box<StdError>),
            }
        }
        GridReader {
            size_range: SizeRange::from(1..1025).0,
            cell_parser: Box::new(cell_parser),
        }
    }
pub fn new ( ) -> GridReader { fn cell_parser ( token : & str ) -> Result < Option < usize > , Box < StdError > > { match token { " " | " " | " " | " " | " " | " " => Ok ( None ) , _ => token . parse :: < usize > ( ) . map ( Some ) . map_err ( | err | Box :: new ( err ) as Box < StdError > ) , } } GridReader { size_range : SizeRange :: from ( 1 .. 1025 ) . 0 , cell_parser : Box :: new ( cell_parser ) , } }
Returns a new `GridReader` with reasonable defaults.
Returns a new ` GridReader ` with reasonable defaults .