| // Copyright (C) 2017-2019 Baidu, Inc. All Rights Reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions |
| // are met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in |
| // the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Baidu, Inc., nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| macro_rules! cfg_if { |
| ($( |
| if #[cfg($($meta:meta),*)] { $($it:item)* } |
| ) else * else { |
| $($it2:item)* |
| }) => { |
| __cfg_if_items! { |
| () ; |
| $( ( ($($meta),*) ($($it)*) ), )* |
| ( () ($($it2)*) ), |
| } |
| } |
| } |
| |
| macro_rules! __cfg_if_items { |
| (($($not:meta,)*) ; ) => {}; |
| (($($not:meta,)*) ; ( ($($m:meta),*) ($($it:item)*) ), $($rest:tt)*) => { |
| __cfg_if_apply! { cfg(all(not(any($($not),*)), $($m,)*)), $($it)* } |
| __cfg_if_items! { ($($not,)* $($m,)*) ; $($rest)* } |
| } |
| } |
| |
| macro_rules! __cfg_if_apply { |
| ($m:meta, $($it:item)*) => { |
| $(#[$m] $it)* |
| } |
| } |
| |
| macro_rules! __item { |
| ($i:item) => ($i) |
| } |
| |
| macro_rules! s { |
| ($($(#[$attr:meta])* pub struct $i:ident { $($field:tt)* })*) => ($( |
| __item! { |
| #[repr(C)] |
| $(#[$attr])* |
| pub struct $i { $($field)* } |
| } |
| impl Copy for $i {} |
| impl Clone for $i { |
| fn clone(&self) -> $i { *self } |
| } |
| )*) |
| } |
| |
| macro_rules! f { |
| ($(pub fn $i:ident($($arg:ident: $argty:ty),*) -> $ret:ty { |
| $($body:stmt);* |
| })*) => ($( |
| #[inline] |
| #[cfg(not(cross_platform_docs))] |
| pub unsafe extern fn $i($($arg: $argty),*) -> $ret { |
| $($body);* |
| } |
| |
| #[cfg(cross_platform_docs)] |
| #[allow(dead_code)] |
| pub unsafe extern fn $i($($arg: $argty),*) -> $ret { |
| loop {} |
| } |
| )*) |
| } |