seqan3::dna5 Class Reference

The five letter DNA alphabet of A,C,G,T and the unknown character N. More...

#include <seqan3/alphabet/nucleotide/dna5.hpp>

Inheritance diagram for seqan3::dna5:

Public Member Functions
Constructors, destructor and assignment
constexpr	dna5 () noexcept=default
	Defaulted.
constexpr	dna5 (dna5 const &) noexcept=default
	Defaulted.
constexpr	dna5 (dna5 &&) noexcept=default
	Defaulted.
constexpr dna5 &	operator= (dna5 const &) noexcept=default
	Defaulted.
constexpr dna5 &	operator= (dna5 &&) noexcept=default
	Defaulted.
	~dna5 () noexcept=default
	Defaulted.
template<std::same_as< rna5 > t>
constexpr	dna5 (t const &r) noexcept
	Allow implicit construction from seqan3::rna5 of the same size.
Public Member Functions inherited from seqan3::nucleotide_base< dna5, 5 >
constexpr rank_type	to_rank () const noexcept
	Return the letter's numeric value (rank in the alphabet).
constexpr dna5	complement () const noexcept
	Return the complement of the letter.
constexpr	nucleotide_base (other_nucl_type const &other) noexcept
	Allow explicit construction from any other nucleotide type and convert via the character representation.
Public Member Functions inherited from seqan3::alphabet_base< derived_type, size, char_t >
constexpr	alphabet_base () noexcept=default
	Defaulted.
constexpr	alphabet_base (alphabet_base const &) noexcept=default
	Defaulted.
constexpr	alphabet_base (alphabet_base &&) noexcept=default
	Defaulted.
constexpr alphabet_base &	operator= (alphabet_base const &) noexcept=default
	Defaulted.
constexpr alphabet_base &	operator= (alphabet_base &&) noexcept=default
	Defaulted.
	~alphabet_base () noexcept=default
	Defaulted.
constexpr char_type	to_char () const noexcept
	Return the letter as a character of char_type.
constexpr rank_type	to_rank () const noexcept
	Return the letter's numeric value (rank in the alphabet).
constexpr derived_type &	assign_char (char_type const chr) noexcept
	Assign from a character, implicitly converts invalid characters.
constexpr derived_type &	assign_rank (rank_type const c) noexcept
	Assign from a numeric value.

Related Symbols
(Note that these are not member symbols.)
using	dna5_vector = std::vector<dna5>
	Alias for a std::vector of seqan3::dna5.
Nucleotide literals
constexpr dna5	operator""_dna5 (char const c) noexcept
	The seqan3::dna5 char literal.
constexpr dna5_vector	operator""_dna5 (char const *s, std::size_t n)
	The seqan3::dna5 string literal.

Additional Inherited Members
Static Public Member Functions inherited from seqan3::nucleotide_base< dna5, 5 >
static constexpr bool	char_is_valid (char_type const c) noexcept
	Validate whether a character value has a one-to-one mapping to an alphabet value.
Static Public Attributes inherited from seqan3::nucleotide_base< dna5, 5 >
static constexpr detail::min_viable_uint_t< size >	alphabet_size
	The size of the alphabet, i.e. the number of different values it can take.
Static Public Attributes inherited from seqan3::alphabet_base< derived_type, size, char_t >
static constexpr detail::min_viable_uint_t< size >	alphabet_size = size
	The size of the alphabet, i.e. the number of different values it can take.
Protected Types inherited from seqan3::alphabet_base< derived_type, size, char_t >
using	char_type = std::conditional_t<std::same_as<char_t, void>, char, char_t>
	The char representation; conditional needed to make semi alphabet definitions legal.
using	rank_type = detail::min_viable_uint_t<size - 1>
	The type of the alphabet when represented as a number (e.g. via to_rank()).

Detailed Description

The five letter DNA alphabet of A,C,G,T and the unknown character N.

Note that you can assign 'U' as a character to dna5 and it will silently be converted to 'T'.

Like most alphabets, this alphabet cannot be initialised directly from its character representation. Instead initialise/assign from the character literal 'A'_dna5 or use the function seqan3::dna5::assign_char().

// SPDX-FileCopyrightText: 2006-2025 Knut Reinert & Freie Universität Berlin
// SPDX-FileCopyrightText: 2016-2025 Knut Reinert & MPI für molekulare Genetik
// SPDX-License-Identifier: CC0-1.0
 
#include <seqan3/alphabet/nucleotide/dna5.hpp>
#include <seqan3/core/debug_stream.hpp>
 
int main()
{
    using namespace seqan3::literals;
 
    seqan3::dna5 letter{'A'_dna5};
 
    letter.assign_char('C');
    seqan3::debug_stream << letter << '\n'; // prints "C"
 
    letter.assign_char('F');                // Unknown characters are implicitly converted to N.
    seqan3::debug_stream << letter << '\n'; // prints "N"
}

This entity is stable. Since version 3.1.

Constructor & Destructor Documentation

dna5()

template<std::same_as< rna5 > t>

seqan3::dna5::dna5 ( t const & r )

inlineconstexprnoexcept

Allow implicit construction from seqan3::rna5 of the same size.

Normally, we do not allow implicit conversion of single argument constructors, but in this case we make an exception, because seqan3::dna5 and seqan3::rna5 are interchangeable as they behave nearly the same (e.g. same ranks, same char to rank conversion).

#include <seqan3/alphabet/nucleotide/dna5.hpp>
#include <seqan3/alphabet/nucleotide/rna5.hpp>
 
int main()
{
    using namespace seqan3::literals;
 
    seqan3::dna5 letter1 = 'C'_rna5; // implicitly converted
    seqan3::dna5 letter2{};
    letter2 = 'C'_rna5; // implicitly converted
}

seqan3::sequences (e.g. seqan3::dna5_vector) in general are not implicitly convertible and must be explicitly copied to be converted:

#include <vector>
 
#include <seqan3/alphabet/nucleotide/dna5.hpp>
#include <seqan3/alphabet/nucleotide/rna5.hpp>
 
int main()
{
    using namespace seqan3::literals;
 
    seqan3::dna5_vector vector{'A'_rna5, 'C'_rna5, 'G'_rna5}; // (element-wise) implicit conversion
 
    // but this won't work:
    // seqan3::dna5_vector dna5_vector{"ACGT"_rna5};
 
    // as a workaround you can use:
    // side note: this would also work without the implicit conversion.
    seqan3::rna5_vector rna5_vector = "ACGT"_rna5;
    seqan3::dna5_vector dna5_vector{rna5_vector.begin(), rna5_vector.end()};
}

You can avoid this copy by using std::ranges::views:

#include <vector>
 
#include <seqan3/alphabet/nucleotide/dna5.hpp>
#include <seqan3/alphabet/nucleotide/rna5.hpp>
#include <seqan3/utility/views/convert.hpp>
 
int main()
{
    using namespace seqan3::literals;
 
    seqan3::dna5_vector vector = "ACG"_dna5;
 
    auto rna5_view = vector | seqan3::views::convert<seqan3::rna5>;
 
    for (auto && chr : rna5_view) // converts lazily on-the-fly
    {
        static_assert(std::same_as<decltype(chr), seqan3::rna5 &&>);
    }
}

This conversion constructor only allows converting seqan3::rna5 to seqan3::dna5. Other alphabets that inherit from seqan3::rna5 will not be implicitly convertible to seqan3::dna5.

#include <seqan3/alphabet/nucleotide/dna5.hpp>
#include <seqan3/alphabet/nucleotide/rna5.hpp>
 
struct my_dna5 : public seqan3::dna5
{
    // using seqan3::dna5::dna5; // uncomment to import implicit conversion shown by letter1
};
 
struct my_rna5 : public seqan3::rna5
{};
 
int main()
{
    using namespace seqan3::literals;
 
    // my_dna5 letter1 = 'C'_rna5; // NO automatic implicit conversion!
    // seqan3::dna5 letter2 = my_rna5{}; // seqan3::dna5 only allows implicit conversion from seqan3::rna5!
}

This entity is stable. Since version 3.1.

Friends And Related Symbol Documentation

dna5_vector

using dna5_vector = std::vector<dna5>

related

Alias for a std::vector of seqan3::dna5.

This entity is stable. Since version 3.1.

operator""_dna5() [1/2]

dna5_vector operator""_dna5 ( char const * s, std::size_t n )

related

The seqan3::dna5 string literal.

Returns

seqan3::dna5_vector

You can use this string literal to easily assign to dna5_vector:

// SPDX-FileCopyrightText: 2006-2025 Knut Reinert & Freie Universität Berlin
// SPDX-FileCopyrightText: 2016-2025 Knut Reinert & MPI für molekulare Genetik
// SPDX-License-Identifier: CC0-1.0
 
// generated from test/snippet/alphabet/nucleotide/@target_alphabet@_literal.cpp.in

#include <seqan3/alphabet/nucleotide/dna5.hpp>
 
int main()
{
    using namespace seqan3::literals;
 
    seqan3::dna5_vector sequence1{"ACGTTA"_dna5};
    seqan3::dna5_vector sequence2 = "ACGTTA"_dna5;
    auto sequence3 = "ACGTTA"_dna5;
}

This entity is stable. Since version 3.1.

operator""_dna5() [2/2]

dna5 operator""_dna5 ( char const c )

related

The seqan3::dna5 char literal.

Returns

seqan3::dna5

You can use this char literal to assign a seqan3::dna4 character:

#include <seqan3/alphabet/nucleotide/dna4.hpp>
 
int main()
{
    using namespace seqan3::literals;
 
    seqan3::dna4 letter1{'A'_dna4};
    auto letter2 = 'A'_dna4;
}

This entity is stable. Since version 3.1.

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The documentation for this class was generated from the following file:

• dna5.hpp