bdca8b01d2
#pragma once is a widely supported compiler pragma, even though it is not part of the C++ standard. Many of the issues keeping #pragma once from being standardized (distributed filesystems, build farms, hard links, etc.) do not apply to CMake - it is easy to build CMake on a single machine. CMake also does not install any header files which can be consumed by other projects (though cmCPluginAPI.h has been deliberately omitted from this conversion in case anyone is still using it.) Finally, #pragma once has been required to build CMake since at least August 2017 (7f29bbe6enabled server mode unconditionally, which had been using #pragma once since September 2016 (b13d3e0d)). The fact that we now require C++11 filters out old compilers, and it is unlikely that there is a compiler which supports C++11 but does not support #pragma once.
103 lines
3.4 KiB
C++
103 lines
3.4 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#pragma once
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#include "cmConfigure.h" // IWYU pragma: keep
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#include <string>
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#include "cmListFileCache.h"
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#include "cmProperty.h"
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#include "cmStateTypes.h"
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#include "cmStringAlgorithms.h"
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#include "cmSystemTools.h"
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class cmMessenger;
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class cmTargetPropertyComputer
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{
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public:
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template <typename Target>
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static cmProp GetProperty(Target const* tgt, const std::string& prop,
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cmMessenger* messenger,
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cmListFileBacktrace const& context)
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{
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if (cmProp loc = GetLocation(tgt, prop, messenger, context)) {
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return loc;
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}
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if (cmSystemTools::GetFatalErrorOccured()) {
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return nullptr;
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}
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if (prop == "SOURCES") {
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return GetSources(tgt, messenger, context);
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}
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return nullptr;
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}
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private:
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static bool HandleLocationPropertyPolicy(std::string const& tgtName,
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cmMessenger* messenger,
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cmListFileBacktrace const& context);
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template <typename Target>
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static const std::string& ComputeLocationForBuild(Target const* tgt);
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template <typename Target>
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static const std::string& ComputeLocation(Target const* tgt,
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std::string const& config);
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template <typename Target>
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static cmProp GetLocation(Target const* tgt, std::string const& prop,
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cmMessenger* messenger,
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cmListFileBacktrace const& context)
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{
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// Watch for special "computed" properties that are dependent on
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// other properties or variables. Always recompute them.
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if (tgt->GetType() == cmStateEnums::EXECUTABLE ||
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tgt->GetType() == cmStateEnums::STATIC_LIBRARY ||
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tgt->GetType() == cmStateEnums::SHARED_LIBRARY ||
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tgt->GetType() == cmStateEnums::MODULE_LIBRARY ||
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tgt->GetType() == cmStateEnums::UNKNOWN_LIBRARY) {
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static const std::string propLOCATION = "LOCATION";
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if (prop == propLOCATION) {
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if (!tgt->IsImported() &&
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!HandleLocationPropertyPolicy(tgt->GetName(), messenger,
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context)) {
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return nullptr;
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}
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return &ComputeLocationForBuild(tgt);
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}
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// Support "LOCATION_<CONFIG>".
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if (cmHasLiteralPrefix(prop, "LOCATION_")) {
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if (!tgt->IsImported() &&
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!HandleLocationPropertyPolicy(tgt->GetName(), messenger,
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context)) {
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return nullptr;
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}
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std::string configName = prop.substr(9);
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return &ComputeLocation(tgt, configName);
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}
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// Support "<CONFIG>_LOCATION".
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if (cmHasLiteralSuffix(prop, "_LOCATION") &&
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!cmHasLiteralPrefix(prop, "XCODE_ATTRIBUTE_")) {
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std::string configName(prop.c_str(), prop.size() - 9);
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if (configName != "IMPORTED") {
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if (!tgt->IsImported() &&
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!HandleLocationPropertyPolicy(tgt->GetName(), messenger,
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context)) {
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return nullptr;
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}
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return &ComputeLocation(tgt, configName);
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}
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}
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}
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return nullptr;
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}
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template <typename Target>
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static cmProp GetSources(Target const* tgt, cmMessenger* messenger,
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cmListFileBacktrace const& context);
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};
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