pin_project_internal/error.rs
// SPDX-License-Identifier: Apache-2.0 OR MIT
macro_rules! format_err {
($span:expr, $msg:expr $(,)?) => {
syn::Error::new_spanned(&$span as &dyn quote::ToTokens, &$msg as &dyn std::fmt::Display)
};
($span:expr, $($tt:tt)*) => {
format_err!($span, format!($($tt)*))
};
}
macro_rules! bail {
($($tt:tt)*) => {
return Err(format_err!($($tt)*))
};
}