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// Copyright 2022 Huawei Cloud Computing Technology Co., Ltd.
//
// 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.
#ifndef INCLUDED_SRC_BUILDTOOL_BUILD_ENGINE_EXPRESSION_CONFIGURATION_HPP
#define INCLUDED_SRC_BUILDTOOL_BUILD_ENGINE_EXPRESSION_CONFIGURATION_HPP
#include <algorithm>
#include <sstream>
#include <string>
#include "gsl/gsl"
#include "src/buildtool/build_engine/expression/expression.hpp"
#include "src/utils/cpp/concepts.hpp"
#include "src/utils/cpp/gsl.hpp"
// Decorator for Expression containing a map. Adds Prune() and Update().
class Configuration {
public:
explicit Configuration(ExpressionPtr expr) noexcept
: expr_{std::move(expr)} {
ExpectsAudit(expr_->IsMap());
}
explicit Configuration(Expression::map_t&& map) noexcept
: expr_{ExpressionPtr{std::move(map)}} {}
Configuration() noexcept = default;
~Configuration() noexcept = default;
Configuration(Configuration const&) noexcept = default;
Configuration(Configuration&&) noexcept = default;
auto operator=(Configuration const&) noexcept -> Configuration& = default;
auto operator=(Configuration&&) noexcept -> Configuration& = default;
[[nodiscard]] auto operator[](std::string const& key) const
-> ExpressionPtr {
return expr_->Get(key, Expression::none_t{});
}
[[nodiscard]] auto operator[](ExpressionPtr const& key) const
-> ExpressionPtr {
return expr_->Get(key->String(), Expression::none_t{});
}
[[nodiscard]] auto ToString() const -> std::string {
return expr_->ToString();
}
[[nodiscard]] auto ToJson() const -> nlohmann::json {
return expr_->ToJson();
}
[[nodiscard]] auto Enumerate(const std::string& prefix, size_t width) const
-> std::string {
std::stringstream ss{};
if (width > prefix.size()) {
size_t actual_width = width - prefix.size();
for (auto const& [key, value] : expr_->Map()) {
std::string key_str = Expression{key}.ToString();
if (actual_width > key_str.size() + 3) {
ss << prefix << key_str << " : ";
size_t remain = actual_width - key_str.size() - 3;
std::string val_str = value->ToAbbrevString(remain);
if (val_str.size() >= remain) {
ss << val_str.substr(0, remain - 3) << "...";
}
else {
ss << val_str;
}
}
else {
ss << prefix << key_str.substr(0, actual_width);
}
ss << std::endl;
}
}
return ss.str();
}
[[nodiscard]] auto operator==(const Configuration& other) const -> bool {
return expr_ == other.expr_;
}
[[nodiscard]] auto hash() const noexcept -> std::size_t {
return std::hash<ExpressionPtr>{}(expr_);
}
template <InputIterableStringContainer T>
[[nodiscard]] auto Prune(T const& vars) const -> Configuration {
auto subset = Expression::map_t::underlying_map_t{};
std::for_each(vars.begin(), vars.end(), [&](auto const& k) {
auto const& map = expr_->Map();
auto v = map.Find(k);
if (v) {
subset.emplace(k, **v);
}
else {
subset.emplace(k, Expression::kNone);
}
});
return Configuration{Expression::map_t{subset}};
}
[[nodiscard]] auto Prune(ExpressionPtr const& vars) const -> Configuration {
auto subset = Expression::map_t::underlying_map_t{};
auto const& list = vars->List();
std::for_each(list.begin(), list.end(), [&](auto const& k) {
auto const& map = expr_->Map();
auto const key = k->String();
auto v = map.Find(key);
if (v) {
subset.emplace(key, **v);
}
else {
subset.emplace(key, ExpressionPtr{Expression::none_t{}});
}
});
return Configuration{Expression::map_t{subset}};
}
template <class T>
requires(Expression::IsValidType<T>() or std::is_same_v<T, ExpressionPtr>)
[[nodiscard]] auto Update(std::string const& name, T const& value) const
-> Configuration {
auto update = Expression::map_t::underlying_map_t{};
update.emplace(name, value);
return Configuration{Expression::map_t{expr_, update}};
}
[[nodiscard]] auto Update(
Expression::map_t::underlying_map_t const& map) const -> Configuration {
if (map.empty()) {
return *this;
}
return Configuration{Expression::map_t{expr_, map}};
}
[[nodiscard]] auto Update(ExpressionPtr const& map) const -> Configuration {
ExpectsAudit(map->IsMap());
if (map->Map().empty()) {
return *this;
}
return Configuration{Expression::map_t{expr_, map}};
}
[[nodiscard]] auto VariableFixed(std::string const& x) const -> bool {
return expr_->Map().Find(x).has_value();
}
[[nodiscard]] auto Expr() const& -> ExpressionPtr const& { return expr_; }
[[nodiscard]] auto Expr() && -> ExpressionPtr { return std::move(expr_); }
private:
ExpressionPtr expr_{Expression::kEmptyMap};
};
namespace std {
template <>
struct hash<Configuration> {
[[nodiscard]] auto operator()(Configuration const& p) const noexcept
-> std::size_t {
return p.hash();
}
};
} // namespace std
#endif // INCLUDED_SRC_BUILDTOOL_BUILD_ENGINE_EXPRESSION_CONFIGURATION_HPP
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