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macros.rs
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macros.rs
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// Bitcoin secp256k1 bindings
// Written in 2014 by
// Dawid Ciężarkiewicz
// Andrew Poelstra
//
// To the extent possible under law, the author(s) have dedicated all
// copyright and related and neighboring rights to this software to
// the public domain worldwide. This software is distributed without
// any warranty.
//
// You should have received a copy of the CC0 Public Domain Dedication
// along with this software.
// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
//
macro_rules! impl_pretty_debug {
($thing:ident) => {
impl core::fmt::Debug for $thing {
fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
write!(f, "{}(", stringify!($thing))?;
for i in &self[..] {
write!(f, "{:02x}", i)?;
}
f.write_str(")")
}
}
}
}
/// Formats error. If `std` feature is OFF appends error source (delimited by `: `). We do this
/// because `e.source()` is only available in std builds, without this macro the error source is
/// lost for no-std builds.
macro_rules! write_err {
($writer:expr, $string:literal $(, $args:expr),*; $source:expr) => {
{
#[cfg(feature = "std")]
{
let _ = &$source; // Prevents clippy warnings.
write!($writer, $string $(, $args)*)
}
#[cfg(not(feature = "std"))]
{
write!($writer, concat!($string, ": {}") $(, $args)*, $source)
}
}
}
}