Macro TRACE

macro_rules! TRACE {
    (type=>$tp:expr, sep=>$sep:expr, $msg:expr) => { ... };
    (type=>$tp:expr, sep=>$sep:expr, $($arg:expr),+) => { ... };
    (type=>$tp:expr, $msg:expr) => { ... };
    (type=>$tp:expr, $($arg:expr),+) => { ... };
    (type=>$tp:expr) => { ... };
    (sep=>$sep:expr, $($arg:expr),+) => { ... };
    ($msg:expr) => { ... };
    ($($arg:expr),+) => { ... };
    () => { ... };
}

Trace macro which concats passed arguments into one string.

Prints with the following format: file!:line! - [type:] [Message]

Usage:

• TRACE!(type=>[TYPE], sep=>[String], [arg1, arg2, ..., argN])
• TRACE!(type=>[TYPE], [arg1, arg2, ..., argN])
• TRACE!(sep=>[String], [arg1, arg2, ..., argN])
• TRACE!([arg1, arg2, ..., argN])
• TRACE!()

Arguments must have fmt::Display trait.