garando_syntax 0.1.1

Backport of libsyntax
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// FIXME garando
macro_rules! __diagnostic_used {
    ($code:tt) => {};
}

#[macro_export]
macro_rules! span_err {
    ($session:expr, $span:expr, $code:ident, $($message:tt)*) => ({
        __diagnostic_used!($code);
        $session.span_err_with_code($span, &format!($($message)*), stringify!($code))
    })
}

#[macro_export]
macro_rules! struct_span_err {
    ($session:expr, $span:expr, $code:ident, $($message:tt)*) => ({
        __diagnostic_used!($code);
        $session.struct_span_err_with_code($span, &format!($($message)*), stringify!($code))
    })
}