src/libstd/rt/macros.rs

   1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 //! Macros used by the runtime.
  12 //!
  13 //! These macros call functions which are only accessible in the `rt` module, so
  14 //! they aren't defined anywhere outside of the `rt` module.
  15
  16 macro_rules! rterrln {
  17     ($fmt:expr) => ( {
  18         ::rt::util::dumb_print(format_args!(concat!($fmt, "\n")))
  19     } );
  20     ($fmt:expr, $($arg:expr),*) => ( {
  21         ::rt::util::dumb_print(format_args!(concat!($fmt, "\n"), $($arg),*))
  22     } )
  23 }
  24
  25 // Some basic logging. Enabled by passing `--cfg rtdebug` to the libstd build.
  26 macro_rules! rtdebug {
  27     ($arg:expr) => ( {
  28         if cfg!(rtdebug) {
  29             rterrln!($arg)
  30         }
  31     } );
  32     ($str:expr, $($arg:expr),*) => ( {
  33         if cfg!(rtdebug) {
  34             rterrln!($str, $($arg),*)
  35         }
  36     })
  37 }
  38
  39 macro_rules! rtassert {
  40     ( $arg:expr ) => ( {
  41         if ::rt::util::ENFORCE_SANITY {
  42             if !$arg {
  43                 rtabort!(" assertion failed: {}", stringify!($arg));
  44             }
  45         }
  46     } )
  47 }
  48
  49 macro_rules! rtabort {
  50     ($($arg:tt)*) => (::rt::util::abort(format_args!($($arg)*)))
  51 }