vendor/opaque-debug/src/lib.rs

   1 //! Macro for opaque `Debug` trait implementation.
   2 #![no_std]
   3
   4 #[doc(hidden)]
   5 pub extern crate core as __core;
   6
   7 /// Macro for defining opaque `Debug` implementation.
   8 ///
   9 /// It will use the following format: "StructName { ... }". While it's
  10 /// convinient to have it (e.g. for including into other structs), it could be
  11 /// undesirable to leak internal state, which can happen for example through
  12 /// uncareful logging.
  13 #[macro_export]
  14 macro_rules! implement {
  15     ($struct:ty) => {
  16         impl $crate::__core::fmt::Debug for $struct {
  17             fn fmt(&self, f: &mut $crate::__core::fmt::Formatter)
  18                 -> Result<(), $crate::__core::fmt::Error>
  19             {
  20                 write!(f, concat!(stringify!($struct), " {{ ... }}"))
  21             }
  22         }
  23     }
  24 }