repeated_view.hpp

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// SPDX-FileCopyrightText: 2026 Jarosław Pelczar <jarek@jpelczar.com>
//
// SPDX-License-Identifier: BSD-2-Clause
 
#pragma once
 
#include "../microfmt.hpp"
#include <cstddef>
#include <string_view>
#include <type_traits>
#include <utility>
 
namespace microfmt {
 
template <typename T> struct RELOCO_POINTER repeated_view {
  T value;
  size_t count{0};
  microfmt::string_view separator{""};
};
 
template <typename T> [[nodiscard]] constexpr auto repeat(T value, size_t count) noexcept {
  return repeated_view<std::decay_t<T>>{std::move(value), count, microfmt::string_view("")};
}
 
template <typename T>
[[nodiscard]] constexpr auto repeat(T value, size_t count, microfmt::string_view separator) noexcept {
  return repeated_view<std::decay_t<T>>{std::move(value), count, separator};
}
 
template <typename T> struct formatter<repeated_view<T>> {
  microfmt::string_view forwarded_spec{""};
 
  constexpr void parse(format_parse_context &ctx) noexcept { forwarded_spec = ctx.spec(); }
 
  void format(const repeated_view<T> &rv, const sink &out) const noexcept {
    formatter<T> elem_fmt;
    format_parse_context elem_ctx(forwarded_spec);
    elem_fmt.parse(elem_ctx);
 
    for (size_t i = 0; i < rv.count; ++i) {
      if (i > 0) {
        out.write(rv.separator);
      }
      elem_fmt.format(rv.value, out);
    }
  }
};
 
} // namespace microfmt