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diff --git a/include/jsoncons_ext/csv/csv_options.hpp b/include/jsoncons_ext/csv/csv_options.hpp
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+++ b/include/jsoncons_ext/csv/csv_options.hpp
@@ -0,0 +1,973 @@
+// Copyright 2013 Daniel Parker
+// Distributed under the Boost license, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// See https://github.com/danielaparker/jsoncons for latest version
+
+#ifndef JSONCONS_CSV_CSV_OPTIONS_HPP
+#define JSONCONS_CSV_CSV_OPTIONS_HPP
+
+#include <string>
+#include <vector>
+#include <utility> // std::pair
+#include <unordered_map> // std::unordered_map
+#include <map>
+#include <limits> // std::numeric_limits
+#include <cwchar>
+#include <jsoncons/json_options.hpp>
+
+namespace jsoncons { namespace csv {
+
+enum class csv_column_type : uint8_t 
+{
+    string_t,integer_t,float_t,boolean_t,repeat_t
+};
+
+enum class quote_style_kind : uint8_t 
+{
+    minimal,all,nonnumeric,none
+};
+
+enum class csv_mapping_kind : uint8_t 
+{
+    n_rows = 1, 
+    n_objects, 
+    m_columns
+};
+
+#if !defined(JSONCONS_NO_DEPRECATED)
+using mapping_kind = csv_mapping_kind;
+JSONCONS_DEPRECATED_MSG("Instead, use quote_style_kind") typedef quote_style_kind quote_styles;
+JSONCONS_DEPRECATED_MSG("Instead, use quote_style_kind") typedef quote_style_kind quote_style_type;
+JSONCONS_DEPRECATED_MSG("Instead, use csv_mapping_kind") typedef csv_mapping_kind mapping_type;
+#endif
+
+enum class column_state {sequence,label};
+
+struct csv_type_info
+{
+    csv_type_info() = default;
+    csv_type_info(const csv_type_info&) = default;
+    csv_type_info(csv_type_info&&) = default;
+
+    csv_type_info(csv_column_type ctype, std::size_t lev, std::size_t repcount = 0) noexcept
+    {
+        col_type = ctype;
+        level = lev;
+        rep_count = repcount;
+    }
+
+    csv_column_type col_type;
+    std::size_t level;
+    std::size_t rep_count;
+};
+
+namespace detail {
+
+template <class CharT,class Container>
+void parse_column_names(const std::basic_string<CharT>& names, 
+                        Container& cont)
+{
+    column_state state = column_state::sequence;
+    typename Container::value_type buffer(cont.get_allocator());
+
+    auto p = names.begin();
+    while (p != names.end())
+    {
+        switch (state)
+        {
+            case column_state::sequence:
+            {
+                switch (*p)
+                {
+                    case ' ': case '\t':case '\r': case '\n':
+                        ++p;
+                        break;
+                    default:
+                        buffer.clear();
+                        state = column_state::label;
+                        break;
+                }
+                break;
+            }
+            case column_state::label:
+            {
+                switch (*p)
+                {
+                case ',':
+                    cont.push_back(buffer);
+                    buffer.clear();
+                    ++p;
+                    state = column_state::sequence;
+                    break;
+                default:
+                    buffer.push_back(*p);
+                    ++p;
+                    break;
+                }
+                break;
+            }
+        }
+    }
+    if (state == column_state::label)
+    {
+        cont.push_back(buffer);
+        buffer.clear();
+    }
+}
+
+template <class CharT,class Container>
+void parse_column_types(const std::basic_string<CharT>& types, 
+                        Container& column_types)
+{
+    const std::map<jsoncons::basic_string_view<CharT>,csv_column_type> type_dictionary =
+    {
+
+        {JSONCONS_STRING_VIEW_CONSTANT(CharT,"string"),csv_column_type::string_t},
+        {JSONCONS_STRING_VIEW_CONSTANT(CharT,"integer"),csv_column_type::integer_t},
+        {JSONCONS_STRING_VIEW_CONSTANT(CharT,"float"),csv_column_type::float_t},
+        {JSONCONS_STRING_VIEW_CONSTANT(CharT,"boolean"),csv_column_type::boolean_t}
+    };
+
+    column_state state = column_state::sequence;
+    int depth = 0;
+    std::basic_string<CharT> buffer;
+
+    auto p = types.begin();
+    while (p != types.end())
+    {
+        switch (state)
+        {
+            case column_state::sequence:
+            {
+                switch (*p)
+                {
+                case ' ': case '\t':case '\r': case '\n':
+                    ++p;
+                    break;
+                case '[':
+                    ++depth;
+                    ++p;
+                    break;
+                case ']':
+                    JSONCONS_ASSERT(depth > 0);
+                    --depth;
+                    ++p;
+                    break;
+                case '*':
+                    {
+                        JSONCONS_ASSERT(column_types.size() != 0);
+                        std::size_t offset = 0;
+                        std::size_t level = column_types.size() > 0 ? column_types.back().level: 0;
+                        if (level > 0)
+                        {
+                            for (auto it = column_types.rbegin();
+                                 it != column_types.rend() && level == it->level;
+                                 ++it)
+                            {
+                                ++offset;
+                            }
+                        }
+                        else
+                        {
+                            offset = 1;
+                        }
+                        column_types.emplace_back(csv_column_type::repeat_t,depth,offset);
+                        ++p;
+                        break;
+                    }
+                default:
+                    buffer.clear();
+                    state = column_state::label;
+                    break;
+                }
+                break;
+            }
+            case column_state::label:
+            {
+                switch (*p)
+                {
+                    case '*':
+                    {
+                        auto it = type_dictionary.find(buffer);
+                        if (it != type_dictionary.end())
+                        {
+                            column_types.emplace_back(it->second,depth);
+                            buffer.clear();
+                        }
+                        else
+                        {
+                            JSONCONS_ASSERT(false);
+                        }
+                        state = column_state::sequence;
+                        break;
+                    }
+                    case ',':
+                    {
+                        auto it = type_dictionary.find(buffer);
+                        if (it != type_dictionary.end())
+                        {
+                            column_types.emplace_back(it->second,depth);
+                            buffer.clear();
+                        }
+                        else
+                        {
+                            JSONCONS_ASSERT(false);
+                        }
+                        ++p;
+                        state = column_state::sequence;
+                        break;
+                    }
+                    case ']':
+                    {
+                        JSONCONS_ASSERT(depth > 0);
+                        auto it = type_dictionary.find(buffer);
+                        if (it != type_dictionary.end())
+                        {
+                            column_types.emplace_back(it->second,depth);
+                            buffer.clear();
+                        }
+                        else
+                        {
+                            JSONCONS_ASSERT(false);
+                        }
+                        --depth;
+                        ++p;
+                        state = column_state::sequence;
+                        break;
+                    }
+                    default:
+                    {
+                        buffer.push_back(*p);
+                        ++p;
+                        break;
+                    }
+                }
+                break;
+            }
+        }
+    }
+    if (state == column_state::label)
+    {
+        auto it = type_dictionary.find(buffer);
+        if (it != type_dictionary.end())
+        {
+            column_types.emplace_back(it->second,depth);
+            buffer.clear();
+        }
+        else
+        {
+            JSONCONS_ASSERT(false);
+        }
+    }
+}
+
+} // detail
+
+template <class CharT>
+class basic_csv_options;
+
+template <class CharT>
+class basic_csv_options_common 
+{
+    friend class basic_csv_options<CharT>;
+public:
+    using char_type = CharT;
+    using string_type = std::basic_string<CharT>;
+private:
+    char_type field_delimiter_;
+    char_type quote_char_;
+    char_type quote_escape_char_;
+    char_type subfield_delimiter_;
+
+    bool enable_nan_to_num_:1;
+    bool enable_inf_to_num_:1;
+    bool enable_neginf_to_num_:1;
+    bool enable_nan_to_str_:1;
+    bool enable_inf_to_str_:1;
+    bool enable_neginf_to_str_:1;
+    bool enable_str_to_nan_:1;
+    bool enable_str_to_inf_:1;
+    bool enable_str_to_neginf_:1;
+
+    string_type nan_to_num_;
+    string_type inf_to_num_;
+    string_type neginf_to_num_;
+    string_type nan_to_str_;
+    string_type inf_to_str_;
+    string_type neginf_to_str_;
+    string_type column_names_;
+
+protected:
+    basic_csv_options_common()
+      : field_delimiter_(','),
+        quote_char_('\"'),
+        quote_escape_char_('\"'),
+        subfield_delimiter_(char_type()),
+        enable_nan_to_num_(false),
+        enable_inf_to_num_(false),
+        enable_neginf_to_num_(false),
+        enable_nan_to_str_(false),
+        enable_inf_to_str_(false),
+        enable_neginf_to_str_(false),
+        enable_str_to_nan_(false),
+        enable_str_to_inf_(false),
+        enable_str_to_neginf_(false)
+    {
+    }
+
+    basic_csv_options_common(const basic_csv_options_common&) = default;
+    basic_csv_options_common& operator=(const basic_csv_options_common&) = default;
+
+    virtual ~basic_csv_options_common() noexcept = default;
+public:
+
+    char_type field_delimiter() const 
+    {
+        return field_delimiter_;
+    }
+
+    const char_type subfield_delimiter() const 
+    {
+        return subfield_delimiter_;
+    }
+
+    char_type quote_char() const 
+    {
+        return quote_char_;
+    }
+
+    char_type quote_escape_char() const 
+    {
+        return quote_escape_char_;
+    }
+
+    string_type column_names() const 
+    {
+        return column_names_;
+    }
+
+    bool enable_nan_to_num() const
+    {
+        return enable_nan_to_num_;
+    }
+
+    bool enable_inf_to_num() const
+    {
+        return enable_inf_to_num_;
+    }
+
+    bool enable_neginf_to_num() const
+    {
+        return enable_neginf_to_num_ || enable_inf_to_num_;
+    }
+
+    bool enable_nan_to_str() const
+    {
+        return enable_nan_to_str_;
+    }
+
+    bool enable_str_to_nan() const
+    {
+        return enable_str_to_nan_;
+    }
+
+    bool enable_inf_to_str() const
+    {
+        return enable_inf_to_str_;
+    }
+
+    bool enable_str_to_inf() const
+    {
+        return enable_str_to_inf_;
+    }
+
+    bool enable_neginf_to_str() const
+    {
+        return enable_neginf_to_str_ || enable_inf_to_str_;
+    }
+
+    bool enable_str_to_neginf() const
+    {
+        return enable_str_to_neginf_ || enable_str_to_inf_;
+    }
+
+    string_type nan_to_num() const
+    {
+        return nan_to_num_; 
+    }
+
+    string_type inf_to_num() const
+    {
+        return inf_to_num_; 
+    }
+
+    string_type neginf_to_num() const
+    {
+        if (enable_neginf_to_num_)
+        {
+            return neginf_to_num_;
+        }
+        else if (enable_inf_to_num_)
+        {
+            string_type s;
+            s.push_back('-');
+            s.append(inf_to_num_);
+            return s;
+        }
+        else
+        {
+            return neginf_to_num_; 
+        }
+    }
+
+    string_type nan_to_str() const
+    {
+        return nan_to_str_;
+    }
+
+    string_type inf_to_str() const
+    {
+        return inf_to_str_; 
+    }
+
+    string_type neginf_to_str() const
+    {
+        if (enable_neginf_to_str_)
+        {
+            return neginf_to_str_;
+        }
+        else if (enable_inf_to_str_)
+        {
+            string_type s;
+            s.push_back('-');
+            s.append(inf_to_str_);
+            return s;
+        }
+        else
+        {
+            return neginf_to_str_; // empty string
+        }
+    }
+};
+
+template <class CharT>
+class basic_csv_decode_options : public virtual basic_csv_options_common<CharT>
+{
+    friend class basic_csv_options<CharT>;
+    using super_type = basic_csv_options_common<CharT>;
+public:
+    using typename super_type::char_type;
+    using typename super_type::string_type;
+
+private:
+    bool assume_header_:1;
+    bool ignore_empty_values_:1;
+    bool ignore_empty_lines_:1;
+    bool trim_leading_:1;
+    bool trim_trailing_:1;
+    bool trim_leading_inside_quotes_:1;
+    bool trim_trailing_inside_quotes_:1;
+    bool unquoted_empty_value_is_null_:1;
+    bool infer_types_:1;
+    bool lossless_number_:1;
+    char_type comment_starter_;
+    csv_mapping_kind mapping_;
+    std::size_t header_lines_;
+    std::size_t max_lines_;
+    string_type column_types_;
+    string_type column_defaults_;
+public:
+    basic_csv_decode_options()
+        : assume_header_(false),
+          ignore_empty_values_(false),
+          ignore_empty_lines_(true),
+          trim_leading_(false),
+          trim_trailing_(false),
+          trim_leading_inside_quotes_(false),
+          trim_trailing_inside_quotes_(false),
+          unquoted_empty_value_is_null_(false),
+          infer_types_(true),
+          lossless_number_(false),
+          comment_starter_('\0'),
+          mapping_(),
+          header_lines_(0),
+          max_lines_((std::numeric_limits<std::size_t>::max)())
+    {}
+
+    basic_csv_decode_options(const basic_csv_decode_options& other) = default;
+
+    basic_csv_decode_options(basic_csv_decode_options&& other)
+        : super_type(std::forward<basic_csv_decode_options>(other)),
+          assume_header_(other.assume_header_),
+          ignore_empty_values_(other.ignore_empty_values_),
+          ignore_empty_lines_(other.ignore_empty_lines_),
+          trim_leading_(other.trim_leading_),
+          trim_trailing_(other.trim_trailing_),
+          trim_leading_inside_quotes_(other.trim_leading_inside_quotes_),
+          trim_trailing_inside_quotes_(other.trim_trailing_inside_quotes_),
+          unquoted_empty_value_is_null_(other.unquoted_empty_value_is_null_),
+          infer_types_(other.infer_types_),
+          lossless_number_(other.lossless_number_),
+          comment_starter_(other.comment_starter_),
+          mapping_(other.mapping_),
+          header_lines_(other.header_lines_),
+          max_lines_(other.max_lines_),
+          column_types_(std::move(other.column_types_)),
+          column_defaults_(std::move(other.column_defaults_))
+    {}
+
+    std::size_t header_lines() const 
+    {
+        return (assume_header_ && header_lines_ <= 1) ? 1 : header_lines_;
+    }
+
+    bool assume_header() const 
+    {
+        return assume_header_;
+    }
+
+    bool ignore_empty_values() const 
+    {
+        return ignore_empty_values_;
+    }
+
+    bool ignore_empty_lines() const 
+    {
+        return ignore_empty_lines_;
+    }
+
+    bool trim_leading() const 
+    {
+        return trim_leading_;
+    }
+
+    bool trim_trailing() const 
+    {
+        return trim_trailing_;
+    }
+
+    bool trim_leading_inside_quotes() const 
+    {
+        return trim_leading_inside_quotes_;
+    }
+
+    bool trim_trailing_inside_quotes() const 
+    {
+        return trim_trailing_inside_quotes_;
+    }
+
+    bool trim() const 
+    {
+        return trim_leading_ && trim_trailing_;
+    }
+
+    bool trim_inside_quotes() const 
+    {
+        return trim_leading_inside_quotes_ && trim_trailing_inside_quotes_;
+    }
+
+    bool unquoted_empty_value_is_null() const 
+    {
+        return unquoted_empty_value_is_null_;
+    }
+
+    bool infer_types() const 
+    {
+        return infer_types_;
+    }
+
+    bool lossless_number() const 
+    {
+        return lossless_number_;
+    }
+
+    char_type comment_starter() const 
+    {
+        return comment_starter_;
+    }
+
+    csv_mapping_kind mapping_kind() const 
+    {
+        return mapping_ != csv_mapping_kind() ? mapping_ : (assume_header() || this->column_names().size() > 0 ? csv_mapping_kind::n_objects : csv_mapping_kind::n_rows);
+    }
+
+#if !defined(JSONCONS_NO_DEPRECATED)
+    csv_mapping_kind mapping() const 
+    {
+        return mapping_kind();
+    }
+#endif
+
+    std::size_t max_lines() const 
+    {
+        return max_lines_;
+    }
+
+    string_type column_types() const 
+    {
+        return column_types_;
+    }
+
+    string_type column_defaults() const 
+    {
+        return column_defaults_;
+    }
+};
+
+template <class CharT>
+class basic_csv_encode_options : public virtual basic_csv_options_common<CharT>
+{
+    friend class basic_csv_options<CharT>;
+    using super_type = basic_csv_options_common<CharT>;
+public:
+    using typename super_type::char_type;
+    using typename super_type::string_type;
+private:
+    quote_style_kind quote_style_;
+    float_chars_format float_format_;
+    int8_t precision_;
+    string_type line_delimiter_;
+public:
+    basic_csv_encode_options()
+      : quote_style_(quote_style_kind::minimal),
+        float_format_(float_chars_format::general),
+        precision_(0)
+    {
+        line_delimiter_.push_back('\n');
+    }
+
+    basic_csv_encode_options(const basic_csv_encode_options& other) = default;
+
+    basic_csv_encode_options(basic_csv_encode_options&& other)
+        : super_type(std::forward<basic_csv_encode_options>(other)),
+          quote_style_(other.quote_style_),
+          float_format_(other.float_format_),
+          precision_(other.precision_),
+          line_delimiter_(std::move(other.line_delimiter_))
+    {
+    }
+
+    quote_style_kind quote_style() const 
+    {
+        return quote_style_;
+    }
+
+    float_chars_format float_format() const 
+    {
+        return float_format_;
+    }
+
+    int8_t precision() const 
+    {
+        return precision_;
+    }
+
+    string_type line_delimiter() const
+    {
+        return line_delimiter_;
+    }
+};
+
+template <class CharT>
+class basic_csv_options final : public basic_csv_decode_options<CharT>, public basic_csv_encode_options<CharT>  
+{
+    using char_type = CharT;
+    using string_type = std::basic_string<CharT>;
+
+public:
+    using basic_csv_decode_options<CharT>::enable_str_to_nan;
+    using basic_csv_decode_options<CharT>::enable_str_to_inf;
+    using basic_csv_decode_options<CharT>::enable_str_to_neginf;
+    using basic_csv_decode_options<CharT>::nan_to_str;
+    using basic_csv_decode_options<CharT>::inf_to_str;
+    using basic_csv_decode_options<CharT>::neginf_to_str;
+    using basic_csv_decode_options<CharT>::nan_to_num;
+    using basic_csv_decode_options<CharT>::inf_to_num;
+    using basic_csv_decode_options<CharT>::neginf_to_num;
+    using basic_csv_decode_options<CharT>::field_delimiter;
+    using basic_csv_decode_options<CharT>::subfield_delimiter;
+    using basic_csv_decode_options<CharT>::quote_char;
+    using basic_csv_decode_options<CharT>::quote_escape_char;
+    using basic_csv_decode_options<CharT>::column_names;
+    using basic_csv_decode_options<CharT>::header_lines; 
+    using basic_csv_decode_options<CharT>::assume_header; 
+    using basic_csv_decode_options<CharT>::ignore_empty_values; 
+    using basic_csv_decode_options<CharT>::ignore_empty_lines; 
+    using basic_csv_decode_options<CharT>::trim_leading; 
+    using basic_csv_decode_options<CharT>::trim_trailing; 
+    using basic_csv_decode_options<CharT>::trim_leading_inside_quotes; 
+    using basic_csv_decode_options<CharT>::trim_trailing_inside_quotes; 
+    using basic_csv_decode_options<CharT>::trim; 
+    using basic_csv_decode_options<CharT>::trim_inside_quotes; 
+    using basic_csv_decode_options<CharT>::unquoted_empty_value_is_null; 
+    using basic_csv_decode_options<CharT>::infer_types; 
+    using basic_csv_decode_options<CharT>::lossless_number; 
+    using basic_csv_decode_options<CharT>::comment_starter; 
+    using basic_csv_decode_options<CharT>::mapping; 
+    using basic_csv_decode_options<CharT>::max_lines; 
+    using basic_csv_decode_options<CharT>::column_types; 
+    using basic_csv_decode_options<CharT>::column_defaults; 
+    using basic_csv_encode_options<CharT>::float_format;
+    using basic_csv_encode_options<CharT>::precision;
+    using basic_csv_encode_options<CharT>::line_delimiter;
+    using basic_csv_encode_options<CharT>::quote_style;
+
+    static constexpr size_t default_indent = 4;
+
+//  Constructors
+
+    basic_csv_options() = default;
+    basic_csv_options(const basic_csv_options&) = default;
+    basic_csv_options(basic_csv_options&&) = default;
+    basic_csv_options& operator=(const basic_csv_options&) = default;
+    basic_csv_options& operator=(basic_csv_options&&) = default;
+
+    basic_csv_options& float_format(float_chars_format value)
+    {
+        this->float_format_ = value;
+        return *this;
+    }
+
+    basic_csv_options& precision(int8_t value)
+    {
+        this->precision_ = value;
+        return *this;
+    }
+
+    basic_csv_options& header_lines(std::size_t value)
+    {
+        this->header_lines_ = value;
+        return *this;
+    }
+
+    basic_csv_options& assume_header(bool value)
+    {
+        this->assume_header_ = value;
+        return *this;
+    }
+
+    basic_csv_options& ignore_empty_values(bool value)
+    {
+        this->ignore_empty_values_ = value;
+        return *this;
+    }
+
+    basic_csv_options& ignore_empty_lines(bool value)
+    {
+        this->ignore_empty_lines_ = value;
+        return *this;
+    }
+
+    basic_csv_options& trim_leading(bool value)
+    {
+        this->trim_leading_ = value;
+        return *this;
+    }
+
+    basic_csv_options& trim_trailing(bool value)
+    {
+        this->trim_trailing_ = value;
+        return *this;
+    }
+
+    basic_csv_options& trim_leading_inside_quotes(bool value)
+    {
+        this->trim_leading_inside_quotes_ = value;
+        return *this;
+    }
+
+    basic_csv_options& trim_trailing_inside_quotes(bool value)
+    {
+        this->trim_trailing_inside_quotes_ = value;
+        return *this;
+    }
+
+    basic_csv_options& trim(bool value)
+    {
+        this->trim_leading_ = value;
+        this->trim_trailing_ = value;
+        return *this;
+    }
+
+    basic_csv_options& trim_inside_quotes(bool value)
+    {
+        this->trim_leading_inside_quotes_ = value;
+        this->trim_trailing_inside_quotes_ = value;
+        return *this;
+    }
+
+    basic_csv_options& unquoted_empty_value_is_null(bool value)
+    {
+        this->unquoted_empty_value_is_null_ = value;
+        return *this;
+    }
+
+    basic_csv_options& column_names(const string_type& value)
+    {
+        this->column_names_ = value;
+        return *this;
+    }
+
+    basic_csv_options& column_types(const string_type& value)
+    {
+        this->column_types_ = value;
+        return *this;
+    }
+
+    basic_csv_options& column_defaults(const string_type& value)
+    {
+        this->column_defaults_ = value;
+        return *this;
+    }
+
+    basic_csv_options& field_delimiter(char_type value)
+    {
+        this->field_delimiter_ = value;
+        return *this;
+    }
+
+    basic_csv_options& subfield_delimiter(char_type value)
+    {
+        this->subfield_delimiter_ = value;
+        return *this;
+    }
+
+    basic_csv_options& line_delimiter(const string_type& value)
+    {
+        this->line_delimiter_ = value;
+        return *this;
+    }
+
+    basic_csv_options& quote_char(char_type value)
+    {
+        this->quote_char_ = value;
+        return *this;
+    }
+
+    basic_csv_options& infer_types(bool value)
+    {
+        this->infer_types_ = value;
+        return *this;
+    }
+
+    basic_csv_options& lossless_number(bool value) 
+    {
+        this->lossless_number_ = value;
+        return *this;
+    }
+
+    basic_csv_options& quote_escape_char(char_type value)
+    {
+        this->quote_escape_char_ = value;
+        return *this;
+    }
+
+    basic_csv_options& comment_starter(char_type value)
+    {
+        this->comment_starter_ = value;
+        return *this;
+    }
+
+    basic_csv_options& quote_style(quote_style_kind value)
+    {
+        this->quote_style_ = value;
+        return *this;
+    }
+
+//#if !defined(JSONCONS_NO_DEPRECATED)
+    basic_csv_options& mapping(csv_mapping_kind value)
+    {
+        this->mapping_ = value;
+        return *this;
+    }
+//#endif
+
+    basic_csv_options& mapping_kind(csv_mapping_kind value)
+    {
+        this->mapping_ = value;
+        return *this;
+    }
+
+    basic_csv_options& max_lines(std::size_t value)
+    {
+        this->max_lines_ = value;
+        return *this;
+    }
+
+    basic_csv_options& nan_to_num(const string_type& value)
+    {
+        this->enable_nan_to_num_ = true;
+        this->nan_to_str_.clear();
+        this->nan_to_num_ = value;
+        return *this;
+    }
+
+    basic_csv_options& inf_to_num(const string_type& value)
+    {
+        this->enable_inf_to_num_ = true;
+        this->inf_to_str_.clear();
+        this->inf_to_num_ = value;
+        return *this;
+    }
+
+    basic_csv_options& neginf_to_num(const string_type& value)
+    {
+        this->enable_neginf_to_num_ = true;
+        this->neginf_to_str_.clear();
+        this->neginf_to_num_ = value;
+        return *this;
+    }
+
+    basic_csv_options& nan_to_str(const string_type& value, bool enable_inverse = true)
+    {
+        this->enable_nan_to_str_ = true;
+        this->enable_str_to_nan_ = enable_inverse;
+        this->nan_to_num_.clear();
+        this->nan_to_str_ = value;
+        return *this;
+    }
+
+    basic_csv_options& inf_to_str(const string_type& value, bool enable_inverse = true)
+    {
+        this->enable_inf_to_str_ = true;
+        this->enable_inf_to_str_ = enable_inverse;
+        this->inf_to_num_.clear();
+        this->inf_to_str_ = value;
+        return *this;
+    }
+
+    basic_csv_options& neginf_to_str(const string_type& value, bool enable_inverse = true)
+    {
+        this->enable_neginf_to_str_ = true;
+        this->enable_neginf_to_str_ = enable_inverse;
+        this->neginf_to_num_.clear();
+        this->neginf_to_str_ = value;
+        return *this;
+    }
+
+#if !defined(JSONCONS_NO_DEPRECATED)
+
+    JSONCONS_DEPRECATED_MSG("Instead, use float_format(float_chars_format)")
+    basic_csv_options& floating_point_format(float_chars_format value)
+    {
+        this->float_format_ = value;
+        return *this;
+    }
+#endif
+
+};
+
+using csv_options = basic_csv_options<char>;
+using wcsv_options = basic_csv_options<wchar_t>;
+
+#if !defined(JSONCONS_NO_DEPRECATED)
+JSONCONS_DEPRECATED_MSG("Instead, use csv_options") typedef csv_options csv_parameters;
+JSONCONS_DEPRECATED_MSG("Instead, use wcsv_options") typedef wcsv_options wcsv_parameters;
+JSONCONS_DEPRECATED_MSG("Instead, use csv_options") typedef csv_options csv_serializing_options;
+JSONCONS_DEPRECATED_MSG("Instead, use wcsv_options") typedef wcsv_options wcsv_serializing_options;
+#endif
+
+
+}}
+#endif