73 lines
1.9 KiB
Rust
73 lines
1.9 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// xfail-test - this isn't really a test.
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{
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// select!
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macro_rules! select_if (
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{
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$index:expr,
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$count:expr
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} => {
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fail!()
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};
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{
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$index:expr,
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$count:expr,
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$port:path => [
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$(type_this $message:path$(($(x $x: ident),+))dont_type_this*
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-> $next:ident => { $e:expr }),+
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]
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$(, $ports:path => [
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$(type_this $messages:path$(($(x $xs: ident),+))dont_type_this*
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-> $nexts:ident => { $es:expr }),+
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] )*
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} => {
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if $index == $count {
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match pipes::try_recv($port) {
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$(Some($message($($($x,)+)* next)) => {
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let $next = next;
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$e
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})+
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_ => fail!()
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}
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} else {
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select_if!(
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$index,
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$count + 1
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$(, $ports => [
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$(type_this $messages$(($(x $xs),+))dont_type_this*
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-> $nexts => { $es }),+
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])*
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)
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}
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};
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)
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macro_rules! select (
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{
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$( $port:path => {
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$($message:path$(($($x: ident),+))dont_type_this*
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-> $next:ident $e:expr),+
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} )+
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} => {
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let index = pipes::selecti([$(($port).header()),+]);
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select_if!(index, 0 $(, $port => [
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$(type_this $message$(($(x $x),+))dont_type_this* -> $next => { $e }),+
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])+)
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}
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)
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}
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