SeqAn3  3.0.2
The Modern C++ library for sequence analysis.
debug_stream_variant.hpp
Go to the documentation of this file.
1 // -----------------------------------------------------------------------------------------------------
2 // Copyright (c) 2006-2020, Knut Reinert & Freie Universität Berlin
3 // Copyright (c) 2016-2020, Knut Reinert & MPI für molekulare Genetik
4 // This file may be used, modified and/or redistributed under the terms of the 3-clause BSD-License
5 // shipped with this file and also available at: https://github.com/seqan/seqan3/blob/master/LICENSE.md
6 // -----------------------------------------------------------------------------------------------------
7 
13 #pragma once
14 
15 #include <variant>
16 
19 
20 namespace seqan3
21 {
35 template <typename variant_type, typename char_t>
37  requires detail::is_type_specialisation_of_v<remove_cvref_t<variant_type>, std::variant>
40 {
41  if (!v.valueless_by_exception())
42  std::visit([&s] (auto && arg) {s << arg;}, v);
43  else
44  s << "<VALUELESS_VARIANT>";
45  return s;
46 }
47 
49 
50 } // namespace seqan3
template_inspection.hpp
Provides seqan3::type_list and auxiliary type traits.
debug_stream_type.hpp
Provides seqan3::debug_stream and related types.
seqan3::debug_stream_type
A "pretty printer" for most SeqAn data structures and related types.
Definition: debug_stream_type.hpp:70
seqan3
The main SeqAn3 namespace.
Definition: aligned_sequence_concept.hpp:35
seqan3::operator<<
debug_stream_type< char_t > & operator<<(debug_stream_type< char_t > &stream, tuple_t &&alignment)
Stream operator for alignments, which are represented as tuples of aligned sequences.
Definition: aligned_sequence_concept.hpp:562
std::visit
T visit(T... args)
variant