src/libsyntax/diagnostics/macros.rs

// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

#[macro_export]
macro_rules! register_diagnostic {
    ($code:tt, $description:tt) => (__register_diagnostic! { $code, $description });
    ($code:tt) => (__register_diagnostic! { $code })
}

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

#[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! span_warn {
    ($session:expr, $span:expr, $code:ident, $($message:tt)*) => ({
        __diagnostic_used!($code);
        $session.span_warn_with_code($span, &format!($($message)*), stringify!($code))
    })
}

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

#[macro_export]
macro_rules! struct_span_fatal {
    ($session:expr, $span:expr, $code:ident, $($message:tt)*) => ({
        __diagnostic_used!($code);
        $session.struct_span_fatal_with_code($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))
    })
}

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

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

#[macro_export]
macro_rules! span_note {
    ($err:expr, $span:expr, $($message:tt)*) => ({
        ($err).span_note($span, &format!($($message)*));
    })
}

#[macro_export]
macro_rules! span_help {
    ($err:expr, $span:expr, $($message:tt)*) => ({
        ($err).span_help($span, &format!($($message)*));
    })
}

#[macro_export]
macro_rules! help {
    ($err:expr, $($message:tt)*) => ({
        ($err).help(&format!($($message)*));
    })
}

#[macro_export]
macro_rules! register_diagnostics {
    ($($code:tt),*) => (
        $(register_diagnostic! { $code })*
    );
    ($($code:tt),*,) => (
        $(register_diagnostic! { $code })*
    )
}

#[macro_export]
macro_rules! register_long_diagnostics {
    ($($code:tt: $description:tt),*) => (
        $(register_diagnostic! { $code, $description })*
    );
    ($($code:tt: $description:tt),*,) => (
        $(register_diagnostic! { $code, $description })*
    )
}