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https://github.com/carbon-language/carbon-lang.git
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Richard Smith
92860c56b4
When we crash, include the source location of the parse node that we were handling, as well as the name of the check function that we were calling. Also include the source snippet, since it's easy to do so, and may avoid the need to look at the input file in some cases.
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "toolchain/diagnostics/diagnostic.h"
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#include <algorithm>
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#include <cstdint>
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namespace Carbon {
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auto DiagnosticLoc::FormatLocation(llvm::raw_ostream& out) const -> void {
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out << filename;
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if (line_number > 0) {
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out << ":" << line_number;
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if (column_number > 0) {
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out << ":" << column_number;
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}
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}
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}
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auto DiagnosticLoc::FormatSnippet(llvm::raw_ostream& out) const -> void {
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if (column_number <= 0) {
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return;
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}
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// column_number is 1-based.
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int32_t column = column_number - 1;
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out << line << "\n";
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out.indent(column);
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out << "^";
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// We want to ensure that we don't underline past the end of the line in
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// case of a multiline token.
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// TODO: revisit this once we can reference multiple ranges on multiple
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// lines in a single diagnostic message.
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int underline_length =
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std::min(length, static_cast<int32_t>(line.size()) - column);
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for (int i = 1; i < underline_length; ++i) {
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out << '~';
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}
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out << '\n';
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}
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} // namespace Carbon
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