File: macro-higher-kinded-function.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (21 lines) | stat: -rw-r--r-- 739 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
#![crate_name = "foo"]

pub struct TyCtxt<'tcx>(&'tcx u8);

macro_rules! gen {
    ($(($name:ident, $tcx:lifetime, [$k:ty], [$r:ty]))*) => {
        pub struct Providers {
            $(pub $name: for<$tcx> fn(TyCtxt<$tcx>, $k) -> $r,)*
        }
    }
}

//@ has 'foo/struct.Providers.html'
//@ has - '//*[@class="rust item-decl"]//code' "pub a: for<'tcx> fn(_: TyCtxt<'tcx>, _: u8) -> i8,"
//@ has - '//*[@class="rust item-decl"]//code' "pub b: for<'tcx> fn(_: TyCtxt<'tcx>, _: u16) -> i16,"
//@ has - '//*[@id="structfield.a"]/code' "a: for<'tcx> fn(_: TyCtxt<'tcx>, _: u8) -> i8"
//@ has - '//*[@id="structfield.b"]/code' "b: for<'tcx> fn(_: TyCtxt<'tcx>, _: u16) -> i16"
gen! {
    (a, 'tcx, [u8], [i8])
    (b, 'tcx, [u16], [i16])
}