3 files changed, 200 insertions, 199 deletions

diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index 76a12d4..9b2043c 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -35,6 +35,134 @@
 #define UNORDERED_SET std::set
 #endif
 
+template <>
+const char* cmTargetPropertyComputer::ComputeLocationForBuild<cmTarget>(
+  cmTarget const* tgt)
+{
+  static std::string loc;
+  if (tgt->IsImported()) {
+    loc = tgt->ImportedGetFullPath("", false);
+    return loc.c_str();
+  }
+
+  cmGlobalGenerator* gg = tgt->GetGlobalGenerator();
+  if (!gg->GetConfigureDoneCMP0026()) {
+    gg->CreateGenerationObjects();
+  }
+  cmGeneratorTarget* gt = gg->FindGeneratorTarget(tgt->GetName());
+  loc = gt->GetLocationForBuild();
+  return loc.c_str();
+}
+
+template <>
+const char* cmTargetPropertyComputer::ComputeLocation<cmTarget>(
+  cmTarget const* tgt, const std::string& config)
+{
+  static std::string loc;
+  if (tgt->IsImported()) {
+    loc = tgt->ImportedGetFullPath(config, false);
+    return loc.c_str();
+  }
+
+  cmGlobalGenerator* gg = tgt->GetGlobalGenerator();
+  if (!gg->GetConfigureDoneCMP0026()) {
+    gg->CreateGenerationObjects();
+  }
+  cmGeneratorTarget* gt = gg->FindGeneratorTarget(tgt->GetName());
+  loc = gt->GetFullPath(config, false);
+  return loc.c_str();
+}
+
+template <>
+const char* cmTargetPropertyComputer::GetSources<cmTarget>(
+  cmTarget const* tgt, cmMessenger* messenger,
+  cmListFileBacktrace const& context)
+{
+  cmStringRange entries = tgt->GetSourceEntries();
+  if (entries.empty()) {
+    return CM_NULLPTR;
+  }
+
+  std::ostringstream ss;
+  const char* sep = "";
+  for (std::vector<std::string>::const_iterator i = entries.begin();
+       i != entries.end(); ++i) {
+    std::string const& entry = *i;
+
+    std::vector<std::string> files;
+    cmSystemTools::ExpandListArgument(entry, files);
+    for (std::vector<std::string>::const_iterator li = files.begin();
+         li != files.end(); ++li) {
+      if (cmHasLiteralPrefix(*li, "$<TARGET_OBJECTS:") &&
+          (*li)[li->size() - 1] == '>') {
+        std::string objLibName = li->substr(17, li->size() - 18);
+
+        if (cmGeneratorExpression::Find(objLibName) != std::string::npos) {
+          ss << sep;
+          sep = ";";
+          ss << *li;
+          continue;
+        }
+
+        bool addContent = false;
+        bool noMessage = true;
+        std::ostringstream e;
+        cmake::MessageType messageType = cmake::AUTHOR_WARNING;
+        switch (context.GetBottom().GetPolicy(cmPolicies::CMP0051)) {
+          case cmPolicies::WARN:
+            e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0051) << "\n";
+            noMessage = false;
+          case cmPolicies::OLD:
+            break;
+          case cmPolicies::REQUIRED_ALWAYS:
+          case cmPolicies::REQUIRED_IF_USED:
+          case cmPolicies::NEW:
+            addContent = true;
+        }
+        if (!noMessage) {
+          e << "Target \"" << tgt->GetName()
+            << "\" contains "
+               "$<TARGET_OBJECTS> generator expression in its sources "
+               "list.  "
+               "This content was not previously part of the SOURCES "
+               "property "
+               "when that property was read at configure time.  Code "
+               "reading "
+               "that property needs to be adapted to ignore the generator "
+               "expression using the string(GENEX_STRIP) command.";
+          messenger->IssueMessage(messageType, e.str(), context);
+        }
+        if (addContent) {
+          ss << sep;
+          sep = ";";
+          ss << *li;
+        }
+      } else if (cmGeneratorExpression::Find(*li) == std::string::npos) {
+        ss << sep;
+        sep = ";";
+        ss << *li;
+      } else {
+        cmSourceFile* sf = tgt->GetMakefile()->GetOrCreateSource(*li);
+        // Construct what is known about this source file location.
+        cmSourceFileLocation const& location = sf->GetLocation();
+        std::string sname = location.GetDirectory();
+        if (!sname.empty()) {
+          sname += "/";
+        }
+        sname += location.GetName();
+
+        ss << sep;
+        sep = ";";
+        // Append this list entry.
+        ss << sname;
+      }
+    }
+  }
+  static std::string srcs;
+  srcs = ss.str();
+  return srcs.c_str();
+}
+
 class cmTargetInternals
 {
 public:
diff --git a/Source/cmTargetPropertyComputer.cxx b/Source/cmTargetPropertyComputer.cxx
index 3e39a8f..21408d1 100644
--- a/Source/cmTargetPropertyComputer.cxx
+++ b/Source/cmTargetPropertyComputer.cxx
@@ -9,7 +9,6 @@
 #include "cmMessenger.h"
 #include "cmSourceFile.h"
 #include "cmSourceFileLocation.h"
-#include "cmSystemTools.h"
 #include "cmTarget.h"
 
 #if defined(CMake_HAVE_CXX_UNORDERED_SET)
@@ -54,194 +53,6 @@ bool cmTargetPropertyComputer::HandleLocationPropertyPolicy(
   return messageType != cmake::FATAL_ERROR;
 }
 
-const char* cmTargetPropertyComputer::ComputeLocationForBuild(
-  cmTarget const* tgt)
-{
-  static std::string loc;
-  if (tgt->IsImported()) {
-    loc = tgt->ImportedGetFullPath("", false);
-    return loc.c_str();
-  }
-
-  cmGlobalGenerator* gg = tgt->GetMakefile()->GetGlobalGenerator();
-  if (!gg->GetConfigureDoneCMP0026()) {
-    gg->CreateGenerationObjects();
-  }
-  cmGeneratorTarget* gt = gg->FindGeneratorTarget(tgt->GetName());
-  loc = gt->GetLocationForBuild();
-  return loc.c_str();
-}
-
-const char* cmTargetPropertyComputer::ComputeLocation(
-  cmTarget const* tgt, std::string const& config)
-{
-  static std::string loc;
-  if (tgt->IsImported()) {
-    loc = tgt->ImportedGetFullPath(config, false);
-    return loc.c_str();
-  }
-
-  cmGlobalGenerator* gg = tgt->GetMakefile()->GetGlobalGenerator();
-  if (!gg->GetConfigureDoneCMP0026()) {
-    gg->CreateGenerationObjects();
-  }
-  cmGeneratorTarget* gt = gg->FindGeneratorTarget(tgt->GetName());
-  loc = gt->GetFullPath(config, false);
-  return loc.c_str();
-}
-
-const char* cmTargetPropertyComputer::GetProperty(
-  cmTarget const* tgt, const std::string& prop, cmMessenger* messenger,
-  cmListFileBacktrace const& context)
-{
-  if (const char* loc = GetLocation(tgt, prop, messenger, context)) {
-    return loc;
-  }
-  if (cmSystemTools::GetFatalErrorOccured()) {
-    return CM_NULLPTR;
-  }
-  if (prop == "SOURCES") {
-    return GetSources(tgt, messenger, context);
-  }
-  return CM_NULLPTR;
-}
-
-const char* cmTargetPropertyComputer::GetLocation(
-  cmTarget const* tgt, const std::string& prop, cmMessenger* messenger,
-  cmListFileBacktrace const& context)
-{
-  // Watch for special "computed" properties that are dependent on
-  // other properties or variables.  Always recompute them.
-  if (tgt->GetType() == cmState::EXECUTABLE ||
-      tgt->GetType() == cmState::STATIC_LIBRARY ||
-      tgt->GetType() == cmState::SHARED_LIBRARY ||
-      tgt->GetType() == cmState::MODULE_LIBRARY ||
-      tgt->GetType() == cmState::UNKNOWN_LIBRARY) {
-    static const std::string propLOCATION = "LOCATION";
-    if (prop == propLOCATION) {
-      if (!tgt->IsImported() &&
-          !HandleLocationPropertyPolicy(tgt->GetName(), messenger, context)) {
-        return CM_NULLPTR;
-      }
-      return ComputeLocationForBuild(tgt);
-    }
-
-    // Support "LOCATION_<CONFIG>".
-    else if (cmHasLiteralPrefix(prop, "LOCATION_")) {
-      if (!tgt->IsImported() &&
-          !HandleLocationPropertyPolicy(tgt->GetName(), messenger, context)) {
-        return CM_NULLPTR;
-      }
-      const char* configName = prop.c_str() + 9;
-      return ComputeLocation(tgt, configName);
-    }
-
-    // Support "<CONFIG>_LOCATION".
-    else if (cmHasLiteralSuffix(prop, "_LOCATION") &&
-             !cmHasLiteralPrefix(prop, "XCODE_ATTRIBUTE_")) {
-      std::string configName(prop.c_str(), prop.size() - 9);
-      if (configName != "IMPORTED") {
-        if (!tgt->IsImported() &&
-            !HandleLocationPropertyPolicy(tgt->GetName(), messenger,
-                                          context)) {
-          return CM_NULLPTR;
-        }
-        return ComputeLocation(tgt, configName);
-      }
-    }
-  }
-  return CM_NULLPTR;
-}
-
-const char* cmTargetPropertyComputer::GetSources(
-  cmTarget const* tgt, cmMessenger* messenger,
-  cmListFileBacktrace const& context)
-{
-  cmStringRange entries = tgt->GetSourceEntries();
-  if (entries.empty()) {
-    return CM_NULLPTR;
-  }
-
-  std::ostringstream ss;
-  const char* sep = "";
-  for (std::vector<std::string>::const_iterator i = entries.begin();
-       i != entries.end(); ++i) {
-    std::string const& entry = *i;
-
-    std::vector<std::string> files;
-    cmSystemTools::ExpandListArgument(entry, files);
-    for (std::vector<std::string>::const_iterator li = files.begin();
-         li != files.end(); ++li) {
-      if (cmHasLiteralPrefix(*li, "$<TARGET_OBJECTS:") &&
-          (*li)[li->size() - 1] == '>') {
-        std::string objLibName = li->substr(17, li->size() - 18);
-
-        if (cmGeneratorExpression::Find(objLibName) != std::string::npos) {
-          ss << sep;
-          sep = ";";
-          ss << *li;
-          continue;
-        }
-
-        bool addContent = false;
-        bool noMessage = true;
-        std::ostringstream e;
-        cmake::MessageType messageType = cmake::AUTHOR_WARNING;
-        switch (context.GetBottom().GetPolicy(cmPolicies::CMP0051)) {
-          case cmPolicies::WARN:
-            e << cmPolicies::GetPolicyWarning(cmPolicies::CMP0051) << "\n";
-            noMessage = false;
-          case cmPolicies::OLD:
-            break;
-          case cmPolicies::REQUIRED_ALWAYS:
-          case cmPolicies::REQUIRED_IF_USED:
-          case cmPolicies::NEW:
-            addContent = true;
-        }
-        if (!noMessage) {
-          e << "Target \"" << tgt->GetName()
-            << "\" contains "
-               "$<TARGET_OBJECTS> generator expression in its sources "
-               "list.  "
-               "This content was not previously part of the SOURCES "
-               "property "
-               "when that property was read at configure time.  Code "
-               "reading "
-               "that property needs to be adapted to ignore the generator "
-               "expression using the string(GENEX_STRIP) command.";
-          messenger->IssueMessage(messageType, e.str(), context);
-        }
-        if (addContent) {
-          ss << sep;
-          sep = ";";
-          ss << *li;
-        }
-      } else if (cmGeneratorExpression::Find(*li) == std::string::npos) {
-        ss << sep;
-        sep = ";";
-        ss << *li;
-      } else {
-        cmSourceFile* sf = tgt->GetMakefile()->GetOrCreateSource(*li);
-        // Construct what is known about this source file location.
-        cmSourceFileLocation const& location = sf->GetLocation();
-        std::string sname = location.GetDirectory();
-        if (!sname.empty()) {
-          sname += "/";
-        }
-        sname += location.GetName();
-
-        ss << sep;
-        sep = ";";
-        // Append this list entry.
-        ss << sname;
-      }
-    }
-  }
-  static std::string srcs;
-  srcs = ss.str();
-  return srcs.c_str();
-}
-
 bool cmTargetPropertyComputer::WhiteListedInterfaceProperty(
   const std::string& prop)
 {
diff --git a/Source/cmTargetPropertyComputer.h b/Source/cmTargetPropertyComputer.h
index 941614b..ed9a4e2 100644
--- a/Source/cmTargetPropertyComputer.h
+++ b/Source/cmTargetPropertyComputer.h
@@ -6,6 +6,7 @@
 #include <cmConfigure.h> // IWYU pragma: keep
 
 #include "cmListFileCache.h"
+#include "cmSystemTools.h"
 
 #include <map>
 #include <string>
@@ -16,12 +17,22 @@ class cmMessenger;
 class cmTargetPropertyComputer
 {
 public:
-  static const char* GetProperty(cmTarget const* tgt, const std::string& prop,
+  template <typename Target>
+  static const char* GetProperty(Target const* tgt, const std::string& prop,
                                  cmMessenger* messenger,
-                                 cmListFileBacktrace const& context);
-
-  static std::map<std::string, std::string> ComputeFileLocations(
-    cmTarget const* tgt);
+                                 cmListFileBacktrace const& context)
+  {
+    if (const char* loc = GetLocation(tgt, prop, messenger, context)) {
+      return loc;
+    }
+    if (cmSystemTools::GetFatalErrorOccured()) {
+      return CM_NULLPTR;
+    }
+    if (prop == "SOURCES") {
+      return GetSources(tgt, messenger, context);
+    }
+    return CM_NULLPTR;
+  }
 
   static bool WhiteListedInterfaceProperty(const std::string& prop);
 
@@ -34,14 +45,65 @@ private:
                                            cmMessenger* messenger,
                                            cmListFileBacktrace const& context);
 
-  static const char* ComputeLocationForBuild(cmTarget const* tgt);
-  static const char* ComputeLocation(cmTarget const* tgt,
+  template <typename Target>
+  static const char* ComputeLocationForBuild(Target const* tgt);
+  template <typename Target>
+  static const char* ComputeLocation(Target const* tgt,
                                      std::string const& config);
-  static const char* GetLocation(cmTarget const* tgt, std::string const& prop,
+
+  template <typename Target>
+  static const char* GetLocation(Target const* tgt, std::string const& prop,
                                  cmMessenger* messenger,
-                                 cmListFileBacktrace const& context);
+                                 cmListFileBacktrace const& context)
+
+  {
+    // Watch for special "computed" properties that are dependent on
+    // other properties or variables.  Always recompute them.
+    if (tgt->GetType() == cmState::EXECUTABLE ||
+        tgt->GetType() == cmState::STATIC_LIBRARY ||
+        tgt->GetType() == cmState::SHARED_LIBRARY ||
+        tgt->GetType() == cmState::MODULE_LIBRARY ||
+        tgt->GetType() == cmState::UNKNOWN_LIBRARY) {
+      static const std::string propLOCATION = "LOCATION";
+      if (prop == propLOCATION) {
+        if (!tgt->IsImported() &&
+            !HandleLocationPropertyPolicy(tgt->GetName(), messenger,
+                                          context)) {
+          return CM_NULLPTR;
+        }
+        return ComputeLocationForBuild(tgt);
+      }
+
+      // Support "LOCATION_<CONFIG>".
+      else if (cmHasLiteralPrefix(prop, "LOCATION_")) {
+        if (!tgt->IsImported() &&
+            !HandleLocationPropertyPolicy(tgt->GetName(), messenger,
+                                          context)) {
+          return CM_NULLPTR;
+        }
+        const char* configName = prop.c_str() + 9;
+        return ComputeLocation(tgt, configName);
+      }
+
+      // Support "<CONFIG>_LOCATION".
+      else if (cmHasLiteralSuffix(prop, "_LOCATION") &&
+               !cmHasLiteralPrefix(prop, "XCODE_ATTRIBUTE_")) {
+        std::string configName(prop.c_str(), prop.size() - 9);
+        if (configName != "IMPORTED") {
+          if (!tgt->IsImported() &&
+              !HandleLocationPropertyPolicy(tgt->GetName(), messenger,
+                                            context)) {
+            return CM_NULLPTR;
+          }
+          return ComputeLocation(tgt, configName);
+        }
+      }
+    }
+    return CM_NULLPTR;
+  }
 
-  static const char* GetSources(cmTarget const* tgt, cmMessenger* messenger,
+  template <typename Target>
+  static const char* GetSources(Target const* tgt, cmMessenger* messenger,
                                 cmListFileBacktrace const& context);
 };