Macro process_results::fallible

macro_rules! fallible {
    ($base : expr) => { ... };
    ($base : expr, $($b_type : ty :) ? | $id : ident $(: $ty : ty) ? | $expr :
 expr $(, $($tail : tt) +) ?) => { ... };
    ($base : expr, $($b_type : ty :) ? move | $id : ident $(: $ty : ty) ? | $expr
 : expr $(, $($tail : tt) +) ?) => { ... };
    ($base : expr, no_discard $($b_type : ty :) ? | $id : ident $(: $ty : ty) ? |
 $expr : expr $(, $($tail : tt) +) ?) => { ... };
    ($base : expr, no_discard $($b_type : ty :) ? move | $id : ident $(: $ty : ty)
 ? | $expr : expr $(, $($tail : tt) +) ?) => { ... };
}

A macro used to reduce boilerplate when nesting multiple calls to process or process_no_discard inside each other.

Fallible and IterResult must be imported to use the macro.