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/* 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;
}
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