Macro struct_parser

macro_rules! struct_parser {
    [
        $struct:ident $( :: $struct_x:ident )* {
            $( $field:ident : $parser:expr ),+
            $(,)?
        }
    ] => { ... };
    [
        $struct:ident $( :: $struct_x:ident )* (
            $( $parser:expr ),+
            $(,)?
        )
    ] => { ... };
}

Parse struct fields in order using an initializer-like syntax

Example

type Parser<'a, T> = fn(&'a [u8]) -> IResult<&'a [u8], T, ()>;

struct Foo<'a> { a: u16, b: &'a [u8] };

// Will parse `a`, then `b`, and return the struct if both succeed
let parse_foo: Parser<Foo> = struct_parser!(
    Foo {
        a: le_u16,
        b: alphanumeric1,
    }
);

assert_eq!(
    parse_foo(b"\x34\x12Bar10"),
    Ok((b"" as &[u8], Foo { a: 0x1234, b: b"Bar10" }))
);