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#[macro_export]
macro_rules! bail {
($e:expr) => {
return Err($crate::err_msg($e));
};
($fmt:expr, $($arg:tt)*) => {
return Err($crate::err_msg(format!($fmt, $($arg)*)));
};
}
#[macro_export(local_inner_macros)]
macro_rules! ensure {
($cond:expr) => {
if !($cond) {
bail!("{}", _failure__stringify!($cond));
}
};
($cond:expr, $e:expr) => {
if !($cond) {
bail!($e);
}
};
($cond:expr, $fmt:expr, $($arg:tt)*) => {
if !($cond) {
bail!($fmt, $($arg)*);
}
};
}
#[doc(hidden)]
#[macro_export]
macro_rules! _failure__stringify {
($($inner:tt)*) => {
stringify! { $($inner)* }
}
}
#[macro_export]
macro_rules! format_err {
($($arg:tt)*) => { $crate::err_msg(format!($($arg)*)) }
}