LCOV - code coverage report
Current view: top level - muse/framework/rcommand - enumcontract.h Coverage Total Hit
Test: filtered_coverage.info Lines: 52.9 % 17 9
Test Date: 2026-11-05 04:07:02

            Line data    Source code
       1              : /*
       2              :  * SPDX-License-Identifier: GPL-3.0-only
       3              :  * MuseScore/Audacity CLA applies
       4              :  *
       5              :  * Copyright (C) MuseScore/Audacity and others
       6              :  *
       7              :  * This program is free software: you can redistribute it and/or modify
       8              :  * it under the terms of the GNU General Public License version 3 as
       9              :  * published by the Free Software Foundation.
      10              :  *
      11              :  * This program is distributed in the hope that it will be useful,
      12              :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13              :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14              :  * GNU General Public License for more details.
      15              :  *
      16              :  * You should have received a copy of the GNU General Public License
      17              :  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
      18              :  */
      19              : 
      20              : #pragma once
      21              : 
      22              : #include <tuple>
      23              : 
      24              : #include "rcommand/commandtypes.h"
      25              : 
      26              : #include "log.h"
      27              : 
      28              : namespace muse::rcommand {
      29              : template<typename E>
      30              : struct Contract;
      31              : 
      32              : template<typename T>
      33              : concept Enumeration = std::is_enum_v<std::remove_cvref_t<T> >;
      34              : 
      35              : template<typename E>
      36              : struct EnumEntry {
      37              :     std::string_view sval;
      38              :     E eval;
      39              :     std::string_view description;
      40              : };
      41              : 
      42              : template<typename E, std::size_t N>
      43              : using Table = std::array<EnumEntry<E>, N>;
      44              : 
      45              : template<typename E, std::size_t N>
      46              : void accepts_table(const Table<E, N>&);
      47              : 
      48              : template<typename T, typename E>
      49              : concept EnumTable = requires(const std::remove_cvref_t<T>& table) {
      50              :     accepts_table<E>(table);
      51              : };
      52              : 
      53              : // *INDENT-OFF* // Uncrustify doesn't understand `requires`
      54              : template<typename C>
      55              : concept EnumContract = requires {
      56              :     { C::key } -> std::convertible_to<const std::string_view&>;
      57              :     { C::def } -> Enumeration;
      58              :     { C::table } -> EnumTable<std::remove_cvref_t<decltype(C::def)>>;
      59              : };
      60              : // *INDENT-ON*
      61              : 
      62              : template<EnumContract C>
      63              : struct BaseContract {
      64           10 :     static std::string str_val(decltype(C::def) eval)
      65              :     {
      66           12 :         for (const auto& row : C::table) {
      67           12 :             if (row.eval == eval) {
      68           20 :                 return std::string(row.sval);
      69              :             }
      70              :         }
      71            0 :         UNREACHABLE;
      72              :         return std::string();
      73              :     }
      74              : 
      75           14 :     static std::optional<decltype(C::def)> enum_val(const std::string& sval)
      76              :     {
      77           27 :         for (const auto& row : C::table) {
      78           25 :             if (row.sval == sval) {
      79           12 :                 return row.eval;
      80              :             }
      81              :         }
      82            2 :         return std::nullopt;
      83              :     }
      84              : 
      85            0 :     static std::pair<std::string, muse::Val> param(decltype(C::def) eval)
      86              :     {
      87            0 :         return { std::string(C::key), muse::Val(str_val(eval)) };
      88              :     }
      89              : 
      90            0 :     static decltype(C::def) get(const muse::rcommand::Params& params)
      91              :     {
      92            0 :         auto sval = params.at(C::key).toString();
      93            0 :         auto value = enum_val(sval);
      94            0 :         return value ? *value : C::def;
      95            0 :     }
      96              : 
      97              :     static void set(muse::rcommand::Params& params, decltype(C::def) eval)
      98              :     {
      99              :         params.set(param(eval));
     100              :     }
     101              : };
     102              : 
     103              : #define DECLARE_CONTRACT(E, C) template<> struct Contract<E> : BaseContract<C> {};
     104              : }
        

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