| // Copyright 2017 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef TOOLS_FIDL_FIDLC_INCLUDE_FIDL_SOURCE_SPAN_H_ |
| #define TOOLS_FIDL_FIDLC_INCLUDE_FIDL_SOURCE_SPAN_H_ |
| |
| #include <cassert> |
| #include <cstdint> |
| #include <string_view> |
| |
| #include "source_manager.h" |
| |
| namespace fidl { |
| |
| // A SourceSpan represents a span of a source file. It consists of a std::string_view, and a |
| // reference to the SourceFile that is backing the std::string_view. |
| |
| class SourceSpan { |
| public: |
| constexpr SourceSpan(std::string_view data, const SourceFile& source_file) |
| : data_(data), source_file_(&source_file) {} |
| |
| constexpr SourceSpan() : data_(std::string_view()), source_file_(nullptr) {} |
| |
| constexpr bool valid() const { return source_file_ != nullptr; } |
| |
| constexpr const std::string_view& data() const { return data_; } |
| constexpr const SourceFile& source_file() const { |
| assert(valid()); |
| return *source_file_; |
| } |
| |
| std::string_view SourceLine(SourceFile::Position* position_out) const; |
| |
| SourceFile::Position position() const; |
| std::string position_str() const; |
| |
| // identity |
| constexpr bool operator==(const SourceSpan& rhs) const { |
| return data_.data() == rhs.data_.data() && data_.size() == rhs.data_.size(); |
| } |
| |
| // supports sorted sets or ordering by SourceSpan, based on filename, |
| // start position, and then end position. |
| inline bool operator<(const SourceSpan& rhs) const { |
| return (source_file_->filename() < rhs.source_file_->filename() || |
| (source_file_ == rhs.source_file_ && |
| (data_.data() < rhs.data_.data() || |
| (data_.data() == rhs.data_.data() && (data_.size() < rhs.data_.size()))))); |
| } |
| |
| private: |
| std::string_view data_; |
| const SourceFile* source_file_; |
| }; |
| |
| } // namespace fidl |
| |
| #endif // TOOLS_FIDL_FIDLC_INCLUDE_FIDL_SOURCE_SPAN_H_ |