struct.h

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//
// Copyright (C) 2026 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
 
#pragma once
 
#include <ostream>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
 
#include "absl/strings/str_cat.h"
#include "absl/strings/str_format.h"
#include "absl/strings/str_join.h"
 
#include "cuttlefish/pretty/numeric.h"  // IWYU pragma: export
#include "cuttlefish/pretty/pretty.h"
#include "cuttlefish/pretty/string.h"  // IWYU pragma: export
 
namespace cuttlefish {
 
class PrettyStruct {
 public:
  explicit PrettyStruct(std::string_view name);
 
  template <typename T>
  PrettyStruct& Member(std::string_view name, const T& value) & {
    MemberInternal(
        absl::StrCat(name, ": ", Pretty(value, PrettyAdlPlaceholder())));
    return *this;
  }
 
  template <typename T>
  PrettyStruct Member(std::string_view name, const T& value) && {
    this->Member(name, value);
    return std::move(*this);
  }
 
  template <typename Sink>
  friend void AbslStringify(Sink& sink, const PrettyStruct& ps) {
    if (ps.members_.empty()) {
      absl::Format(&sink, "%v {}", ps.name_);
    } else {
      absl::Format(&sink, "%v {\n  %v\n}", ps.name_,
                   absl::StrJoin(ps.members_, ",\n  "));
    }
  }
 
 private:
  void MemberInternal(std::string_view);
 
  std::string name_;
  std::vector<std::string> members_;
};
 
std::ostream& operator<<(std::ostream&, const PrettyStruct&);
 
// For libfmt
std::string format_as(const PrettyStruct&);
 
}  // namespace cuttlefish