1 // Copyright (C) 2023-2024 Free Software Foundation, Inc.
3 // This file is part of the GNU Proc Macro Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // Under Section 7 of GPL version 3, you are granted additional
15 // permissions described in the GCC Runtime Library Exception, version
16 // 3.1, as published by the Free Software Foundation.
18 // You should have received a copy of the GNU General Public License and
19 // a copy of the GCC Runtime Library Exception along with this program;
20 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
21 // <http://www.gnu.org/licenses/>.
26 /// A region of source code along with macro expansion information.
27 #[derive(Copy, Clone)]
28 pub struct Span(pub(crate) bridge::span::Span);
31 // TODO: Add experimental API functions for this type
33 /// Creates a new span that resolves at the macro call location.
34 pub fn call_site() -> Self {
35 Span(bridge::span::Span::call_site())
38 /// Creates a new span that resolved sometimes at macro call site, and
39 /// sometimes at macro definition site.
40 pub fn mixed_site() -> Self {
41 Span(bridge::span::Span::mixed_site())
44 /// Creates a new span with the same line/column informations but that
45 /// resolve symbols as though it were at `other`.
49 /// * `other` - Other span to resolve at.
50 pub fn resolved_at(&self, other: Span) -> Self {
51 Span(self.0.resolved_at(other.0))
54 /// Creates a new span with the same name resolution behavior as self, but
55 /// with the line/column information of `other`.
59 /// * `other` - Other span containing the line/column informations to use.
60 pub fn located_at(&self, other: Span) -> Self {
61 Span(self.0.located_at(other.0))
64 /// Return the source text behind a span.
65 pub fn source_text(&self) -> Option<String> {
70 impl fmt::Debug for Span {
71 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {