40 lines
1.2 KiB
Rust
40 lines
1.2 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Span debugger
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//!
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//! This module shows spans for all expressions in the crate
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//! to help with compiler debugging.
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use ast;
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use diagnostic;
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use visit;
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use visit::Visitor;
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struct ShowSpanVisitor<'a> {
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span_diagnostic: &'a diagnostic::SpanHandler,
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}
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impl<'a, 'v> Visitor<'v> for ShowSpanVisitor<'a> {
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fn visit_expr(&mut self, e: &ast::Expr) {
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self.span_diagnostic.span_note(e.span, "expression");
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visit::walk_expr(self, e);
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}
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fn visit_mac(&mut self, macro: &ast::Mac) {
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visit::walk_mac(self, macro);
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}
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}
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pub fn run(span_diagnostic: &diagnostic::SpanHandler, krate: &ast::Crate) {
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let mut v = ShowSpanVisitor { span_diagnostic: span_diagnostic };
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visit::walk_crate(&mut v, krate);
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}
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