repo_description: Metal I/O library for Rust.
repo_topics: asynchronous networking non-blocking rust
code: //! Macros to ease conditional code based on enabled features.
  
  // Depending on the features not all macros are used.
  #![allow(unused_macros)]
  
  /// The `os-poll` feature is enabled.
  macro_rules! cfg_os_poll {
      ($($item:item)*) => {
          $(
              #[cfg(feature = "os-poll")]
              #[cfg_attr(docsrs, doc(cfg(feature = "os-poll")))]
              $item
          )*
      }
  }
  
  /// The `os-poll` feature is disabled.
  macro_rules! cfg_not_os_poll {
      ($($item:item)*) => {
          $(
              #[cfg(not(feature = "os-poll"))]
              $item
          )*
      }
  }
  
  /// The `os-ext` feature is enabled.
  macro_rules! cfg_os_ext {
      ($($item:item)*) => {
          $(
              #[cfg(feature = "os-ext")]
              #[cfg_attr(docsrs, doc(cfg(feature = "os-ext")))]
              $item
          )*
      }
  }
  
  /// The `net` feature is enabled.
  macro_rules! cfg_net {
      ($($item:item)*) => {
          $(
              #[cfg(feature = "net")]
              #[cfg_attr(docsrs, doc(cfg(feature = "net")))]
              $item
          )*
      }
  }
  
  /// One of the features enabled that needs `IoSource`. That is `net` or `os-ext`
  /// on Unix (for `pipe`).
  macro_rules! cfg_io_source {
      ($($item:item)*) => {
          $(
              #[cfg(any(feature = "net", all(unix, feature = "os-ext")))]
              #[cfg_attr(docsrs, doc(cfg(any(feature = "net", all(unix, feature = "os-ext")))))]
              $item
          )*
      }
  }
  
  /// The `os-ext` feature is enabled, or one of the features that need `os-ext`.
  macro_rules! cfg_any_os_ext {
      ($($item:item)*) => {
          $(
              #[cfg(any(feature = "os-ext", feature = "net"))]
              #[cfg_attr(docsrs, doc(cfg(any(feature = "os-ext", feature = "net"))))]
              $item
          )*
      }
  }
  
  macro_rules! trace {
      ($($t:tt)*) => {
          log!(trace, $($t)*)
      }
  }
  
  macro_rules! warn {
      ($($t:tt)*) => {
          log!(warn, $($t)*)
      }
  }
  
  macro_rules! error {
      ($($t:tt)*) => {
          log!(error, $($t)*)
      }
  }
  
  macro_rules! log {
      ($level: ident, $($t:tt)*) => {
          #[cfg(feature = "log")]
          { log::$level!($($t)*) }
          // Silence unused variables warnings.
          #[cfg(not(feature = "log"))]
          { if false { let _ = ( $($t)* ); } }
      }
  }
  