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// Copyright (C) 2023-2024 Free Software Foundation, Inc.
//
// This file is part of the GNU Proc Macro Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
use bridge;
use std::fmt;
/// A region of source code along with macro expansion information.
#[derive(Copy, Clone)]
pub struct Span(pub(crate) bridge::span::Span);
impl Span {
// TODO: Add experimental API functions for this type
/// Creates a new span that resolves at the macro call location.
pub fn call_site() -> Self {
Span(bridge::span::Span::call_site())
}
/// Creates a new span that resolved sometimes at macro call site, and
/// sometimes at macro definition site.
pub fn mixed_site() -> Self {
Span(bridge::span::Span::mixed_site())
}
/// Creates a new span with the same line/column informations but that
/// resolve symbols as though it were at `other`.
///
/// # Arguments
///
/// * `other` - Other span to resolve at.
pub fn resolved_at(&self, other: Span) -> Self {
Span(self.0.resolved_at(other.0))
}
/// Creates a new span with the same name resolution behavior as self, but
/// with the line/column information of `other`.
///
/// # Arguments
///
/// * `other` - Other span containing the line/column informations to use.
pub fn located_at(&self, other: Span) -> Self {
Span(self.0.located_at(other.0))
}
/// Return the source text behind a span.
pub fn source_text(&self) -> Option<String> {
self.0.source_text()
}
}
impl fmt::Debug for Span {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.0.fmt(f)
}
}
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