-
-
Save munael/29d6be9239c4f286b906 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#![allow(unused_mut, non_camel_case_types, dead_code, unused_variables)] | |
#![feature(trace_macros)] | |
use std::fmt::{self, Debug}; | |
/*macro_rules! using { | |
[ $pp:path : ( $($elem:ident),* ) | |
] => [ | |
use $pp :: {self, $(elem),*}; | |
]; | |
} | |
using!{ std::fmt : (Debug) }*/ | |
macro_rules! make_overloadable { | |
[ fn $fn_name:ident(); | |
] => [ | |
trait $fn_name { | |
type ReturnType; | |
fn $fn_name( &self ) -> Self::ReturnType; | |
} | |
]; | |
/*[ fn $fn_name() -> void; | |
] => [ | |
trait $fn_name { | |
type ReturnType; | |
fn $fn_name( &self ); | |
} | |
];*/ | |
} | |
//trait OVERLOADED_GENERIC_FUNCTIONS {} | |
macro_rules! overload_impl { | |
/*[ {$($func:tt)*} :: [ $($all:tt)* ] :: , $t:ident: $($trs:tt)* | |
] => [ | |
overload_impl!{ {$($func)*} :: [ $($all)*, $t: ] :: $($trs)* } | |
];*/ | |
[ {$($func:tt)*} :: [ $($all:tt)* ] :: , $t:ident $($trs:tt)* | |
] => [ | |
overload_impl!{ {$($func)*} :: [ $($all)*, $t ] :: $($trs)* } | |
]; | |
[ {$($func:tt)*} :: [ $($all:tt)* ] :: : !$tr:ident $($trs:tt)* | |
] => [ | |
overload_impl!{ {$($func)*} :: [ $($all)* : !$tr ] :: $($trs)* } | |
]; | |
[ {$($func:tt)*} :: [ $($all:tt)* ] :: : $tr:ident $($trs:tt)* | |
] => [ | |
overload_impl!{ {$($func)*} :: [ $($all)* : $tr ] :: $($trs)* } | |
]; | |
[ {$($func:tt)*} :: [ $($all:tt)* ] :: + !$tr:ident $($trs:tt)* | |
] => [ | |
overload_impl!{ {$($func)*} :: [ $($all)* + !$tr ] :: $($trs)* } | |
]; | |
[ {$($func:tt)*} :: [ $($all:tt)* ] :: + $tr:ident $($trs:tt)* | |
] => [ | |
overload_impl!{ {$($func)*} :: [ $($all)* + $tr ] :: $($trs)* } | |
]; | |
[ {$func:ident; ($( $arg:ident : $typ:ty ),+); $ret:ty => $body:block} :: [ $($all:tt)* ] :: ; | |
] => [ | |
impl< $($all)* > $func for ( $( $typ ),+ ) { | |
type ReturnType = $ret; | |
fn $func ( &self ) -> $ret | |
{ | |
let & ( $( ref $arg ),+ ) = self; | |
$body | |
} | |
} | |
]; | |
[ {$func:ident; ($( $arg:ident : $typ:ty ),+); $ret:ty => $body:block} | $t:ident | |
] => [ | |
impl< $t > $func for ( $( $typ ),+ ) { | |
type ReturnType = $ret; | |
fn $func ( &self ) -> $ret | |
{ | |
let & ( $( ref $arg ),+ ) = self; | |
$body | |
} | |
} | |
]; | |
[ {$($func:tt)*} | $t:ident, $($trs:tt)* | |
] => [ | |
overload_impl!{ {$($func)*} :: [ $t, ] :: $($trs)*; } | |
]; | |
[ {$($func:tt)*} | $t:ident, $($trs:tt)* | |
] => [ | |
overload_impl!{ {$($func)*} :: [ $t, ] :: $($trs)*; } | |
]; | |
[ {$($func:tt)*} | $t:ident : $tr:ident $($trs:tt)* | |
] => [ | |
overload_impl!{ {$($func)*} :: [ $t : $tr ] :: $($trs)*; } | |
]; | |
[ {$($func:tt)*} | $t:ident : ! $tr:ident $($trs:tt)* | |
] => [ | |
overload_impl!{ {$($func)*} :: [ $t : ! $tr ] :: $($trs)*; } | |
]; | |
[ $implementation:item ] => [ $implementation ]; | |
} | |
trace_macros!(true); | |
macro_rules! overload { | |
( [ $( $t:ident $(:$tr:ident)+ ),* ] | |
fn $func:ident( $( $arg:ident : $typ:ident ),+ ) $body:block | |
) => [ | |
impl< $( $t : $( $tr +)+ ),* > $func for ( $( $typ ),+ ) { | |
type ReturnType = (); | |
fn $func ( &self ) | |
{ | |
let & ( $( ref $arg ),+ ) = self; | |
$body | |
} | |
} | |
]; | |
( [ $( $t:ident $(:$tr:ident)+ ),* ] | |
fn $func:ident( $( $arg:ident : $typ:ident ),+ ) -> $ret:ty => $body:block | |
) => [ | |
impl< $( $t : $( $tr +)+ ),* > $func for ( $( $typ ),+ ) { | |
type ReturnType = $ret; | |
fn $func ( &self ) -> $ret | |
{ | |
let & ( $( ref $arg ),+ ) = self; | |
$body | |
} | |
} | |
]; | |
( | |
fn $func:ident( $( $arg:ident : $typ:ty ),+ ) | |
[ $( $T1:ident $(.$tr:ident)* ),* ] | |
// older syntax | |
/*[ $($T0:ident.)* ] [ $( #$T1:ident $(+$tr:ident)* );* ]*/ | |
$body:block | |
) => [ | |
impl | |
< | |
/*$($T0),*/ | |
$( $T1 : $( $tr +)* ),* | |
> $func for ( $( $typ ),+ ) { | |
type ReturnType = (); | |
fn $func ( &self ) | |
{ | |
let & ( $( ref $arg ),+ ) = self; | |
$body | |
} | |
} | |
]; | |
( | |
fn $func:ident( $( $arg:ident : $typ:ty ),+ ) -> $ret:ty | |
/*[ $($T0:ident.)* ]*/ [$($generics:tt)*]//[ $( $T1:ident $(.$tr:tt)* );* ] | |
$body:block | |
) => [ | |
/*impl | |
< | |
//expand_gens!{ | |
$($generics)* | |
/*$($T0),*/ | |
//$( $T1 : $( $tr +)* ),* | |
> $func for ( $( $typ ),+ ) { | |
{ | |
type ReturnType = $ret; | |
fn $func ( &self ) -> $ret | |
{ | |
let & ( $( ref $arg ),+ ) = self; | |
$body | |
} | |
}*/ | |
overload_impl!{ {$func; ($( $arg : $typ ),+); $ret => $body} | $($generics)* } | |
]; | |
} | |
make_overloadable! { | |
fn mk(); | |
} | |
overload! { | |
fn mk( s: (T, bool), g: G ) -> (bool, u8) | |
[ T: Debug, G: !Debug + Copy ] | |
{ | |
println!("{:?}'tup; | |
| {:?}", s, g); | |
(false, 9) | |
} | |
}// | |
/* | |
```{.rust} | |
haskell! { | |
mk :: U: Debug, Copy => () -> () { | |
} | |
} | |
``` | |
*/ | |
overload! { | |
[]fn mk( s: char, g: i32, c: char ) | |
{ | |
println!("{}; {:?}", s, g); | |
} | |
} | |
fn mk<U: fmt::Debug + Copy>(s: i32, g: U) -> bool { | |
println!("{}; {:?}", s, g); | |
false | |
} | |
fn main() { | |
println!("Hello, world!"); | |
mk(32, 'a'); | |
((42, false), 'Z').mk(); | |
('F', 63, 'x').mk(); | |
} | |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment