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