pub fn import<F: From<Rational64> + Zero + One + Neg<Output=F> + Ord + Element>(
    file_path: &Path
) -> Result<impl TryInto<GeneralForm<F>, Error=Inconsistency>, Import>
where
    for<'r> F: Add<&'r F, Output=F>,
    for<'r> &'r F: Neg<Output=F>,
{
    // Open and read the file
    let mut program = String::new();
    File::open(&file_path)
        .map_err(Import::IO)?
        .read_to_string(&mut program)
        .map_err(Import::IO)?;

    // Choose the right parser
    match file_path.extension() {
        Some(extension) => match extension.to_str() {
            Some("mps" | "SIF") => mps::parse(&program).map(DataTypes::MPS),
            Some(extension_string) => Err(Import::FileExtension(format!(
                "Could not recognise file extension \"{}\" of file: {:?}",
                extension_string, file_path
            ))),
            None => Err(Import::FileExtension(format!(
                "Could not convert OsStr to &str, probably invalid unicode: {:?}",
                extension
            ))),
        },
        None => Err(Import::FileExtension(format!(
            "Could not read extension from file path: {:?}",
            file_path
        ))),
    }
}
/// Import a problem from a file.
///
/// Currently only supports the MPS filetype.
///
/// The `import` function takes a file path and returns, if successful, a struct which can be
/// converted to a linear program in general form.
///
/// # Errors
///
/// When a file extension is unknown, a file cannot be found or read, there is an inconsistency in
/// the problem file, etc. an error type is returned.
Import a problem from a file.
Currently only supports the MPS filetype.

The `import` function takes a file path and returns, if successful, a struct which can be
converted to a linear program in general form.
Import a problem from a file . Currently only supports the MPS filetype . The ` import ` function takes a file path and returns if successful a struct which can be converted to a linear program in general form .
pub fn import<F: From<Rational64> + Zero + One + Neg<Output=F> + Ord + Element>(
    file_path: &Path
) -> Result<impl TryInto<GeneralForm<F>, Error=Inconsistency>, Import>
where
    for<'r> F: Add<&'r F, Output=F>,
    for<'r> &'r F: Neg<Output=F>,
{
    // Open and read the file
    let mut program = String::new();
    File::open(&file_path)
        .map_err(Import::IO)?
        .read_to_string(&mut program)
        .map_err(Import::IO)?;
    // Choose the right parser
    match file_path.extension() {
        Some(extension) => match extension.to_str() {
            Some("mps" | "SIF") => mps::parse(&program).map(DataTypes::MPS),
            Some(extension_string) => Err(Import::FileExtension(format!(
                "Could not recognise file extension \"{}\" of file: {:?}",
                extension_string, file_path
            ))),
            None => Err(Import::FileExtension(format!(
                "Could not convert OsStr to &str, probably invalid unicode: {:?}",
                extension
            ))),
        },
        None => Err(Import::FileExtension(format!(
            "Could not read extension from file path: {:?}",
            file_path
        ))),
    }
}
pub fn import < F : From < Rational64 > + Zero + One + Neg < Output = F > + Ord + Element > ( file_path : & Path ) -> Result < impl TryInto < GeneralForm < F > , Error = Inconsistency > , Import > where for < ' r > F : Add < & ' r F , Output = F > , for < ' r > & ' r F : Neg < Output = F > , { // Open and read the file let mut program = String :: new ( ) ; File :: open ( & file_path ) . map_err ( Import :: IO ) ? . read_to_string ( & mut program ) . map_err ( Import :: IO ) ? ; // Choose the right parser match file_path . extension ( ) { Some ( extension ) => match extension . to_str ( ) { Some ( " " | " " ) => mps :: parse ( & program ) . map ( DataTypes :: MPS ) , Some ( extension_string ) => Err ( Import :: FileExtension ( format ! ( " \" \" " extension_string file_path ) ) ) , None => Err ( Import :: FileExtension ( format ! ( " " extension ) ) ) , } , None => Err ( Import :: FileExtension ( format ! ( " " file_path ) ) ) , } }
Import a problem from a file.
Import a problem from a file .
file_path
&Path
file_path
&Path
errors
When a file extension is unknown, a file cannot be found or read, there is an inconsistency in
the problem file, etc. an error type is returned.
When a file extension is unknown a file cannot be found or read there is an inconsistency in the problem file etc . an error type is returned .