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Diffstat (limited to 'Source/cmExperimental.cxx')
-rw-r--r-- | Source/cmExperimental.cxx | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/Source/cmExperimental.cxx b/Source/cmExperimental.cxx new file mode 100644 index 0000000000..922b53fd11 --- /dev/null +++ b/Source/cmExperimental.cxx @@ -0,0 +1,63 @@ +/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying + file Copyright.txt or https://cmake.org/licensing for details. */ + +#include "cmExperimental.h" + +#include <cassert> +#include <cstddef> +#include <string> + +#include "cmMakefile.h" +#include "cmMessageType.h" +#include "cmValue.h" + +namespace { + +/* + * The `Uuid` fields of these objects should change periodically. + * Search for other instances to keep the documentation and test suite + * up-to-date. + */ + +struct FeatureData +{ + std::string const Uuid; + std::string const Variable; + std::string const Description; + bool Warned; +} LookupTable[] = { + // CxxModuleCMakeApi + { "3c375311-a3c9-4396-a187-3227ef642046", + "CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API", + "CMake's C++ module support is experimental. It is meant only for " + "experimentation and feedback to CMake developers.", + false }, +}; +static_assert(sizeof(LookupTable) / sizeof(LookupTable[0]) == + static_cast<size_t>(cmExperimental::Feature::Sentinel), + "Experimental feature lookup table mismatch"); + +FeatureData& DataForFeature(cmExperimental::Feature f) +{ + assert(f != cmExperimental::Feature::Sentinel); + return LookupTable[static_cast<size_t>(f)]; +} +} + +bool cmExperimental::HasSupportEnabled(cmMakefile const& mf, Feature f) +{ + bool enabled = false; + auto& data = DataForFeature(f); + + auto value = mf.GetDefinition(data.Variable); + if (value == data.Uuid) { + enabled = true; + } + + if (enabled && !data.Warned) { + mf.IssueMessage(MessageType::AUTHOR_WARNING, data.Description); + data.Warned = true; + } + + return enabled; +} |