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fa10dc6c22
Adds a parser and serializer for the EcoStd Module Metadata format RFC: https://github.com/ecostd/rfcs/pull/3 This adapts the existing experimental support for import std; to use the new parser. The CMAKE_CXX_STDLIB_MODULES_JSON is now the canonical variable for controlling how CMake discovers the stdlib module metadata, and is used directly by compiler detection. Toolchains can still override the __CMAKE::CXX## targets if they wish, either in conjunction with CMAKE_CXX_STDLIB_MODULE_JSON or not. It is possible to disable automatic detection of CMAKE_CXX_STDLIB_MODULE_JSON by setting it to the empty string. When available, the CMAKE_CXX_STDLIB_MODULE_JSON will be used to create all requested C++ stdlibs which do not already have targets.
85 lines
2.2 KiB
C++
85 lines
2.2 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file LICENSE.rst or https://cmake.org/licensing for details. */
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#pragma once
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include <cm/optional>
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#include <cm/string_view>
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#include <cm3p/json/value.h>
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class cmTarget;
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class cmCxxModuleMetadata
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{
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public:
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struct PreprocessorDefineData
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{
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std::string Name;
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cm::optional<std::string> Value;
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bool Undef = false;
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cm::optional<Json::Value> Vendor;
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};
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struct LocalArgumentsData
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{
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std::vector<std::string> IncludeDirectories;
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std::vector<std::string> SystemIncludeDirectories;
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std::vector<PreprocessorDefineData> Definitions;
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cm::optional<Json::Value> Vendor;
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};
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struct ModuleData
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{
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std::string LogicalName;
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std::string SourcePath;
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bool IsInterface = true;
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bool IsStdLibrary = false;
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cm::optional<LocalArgumentsData> LocalArguments;
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cm::optional<Json::Value> Vendor;
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};
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int Version = 0;
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int Revision = 0;
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std::vector<ModuleData> Modules;
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std::string MetadataFilePath;
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std::unordered_map<std::string, Json::Value> Extensions;
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struct ParseResult;
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struct SaveResult
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{
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bool Ok = false;
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std::string Error;
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explicit operator bool() const { return Ok; }
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};
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static ParseResult LoadFromFile(std::string const& path);
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static Json::Value ToJsonValue(cmCxxModuleMetadata const& meta);
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static SaveResult SaveToFile(std::string const& path,
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cmCxxModuleMetadata const& meta);
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static void PopulateTarget(cmTarget& target, cmCxxModuleMetadata const& meta,
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std::vector<std::string> const& configs);
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static void PopulateTarget(cmTarget& target, cmCxxModuleMetadata const& meta,
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cm::string_view config)
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{
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PopulateTarget(target, meta,
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std::vector<std::string>{ std::string(config) });
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}
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static void PopulateTarget(cmTarget& target, cmCxxModuleMetadata const& meta)
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{
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PopulateTarget(target, meta, "NOCONFIG");
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}
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};
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struct cmCxxModuleMetadata::ParseResult
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{
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cm::optional<cmCxxModuleMetadata> Meta;
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std::string Error;
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explicit operator bool() const { return static_cast<bool>(Meta); }
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};
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