1 files changed, 46 insertions, 0 deletions
diff --git a/Source/cmFunctionBlocker.cxx b/Source/cmFunctionBlocker.cxx
new file mode 100644
index 0000000000..5778a71526
--- /dev/null
+++ b/Source/cmFunctionBlocker.cxx
@@ -0,0 +1,46 @@
+/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+   file Copyright.txt or https://cmake.org/licensing for details.  */
+#include "cmFunctionBlocker.h"
+
+#include <cassert>
+#include <sstream>
+#include <utility>
+
+#include "cmExecutionStatus.h"
+#include "cmMakefile.h"
+#include "cmMessageType.h"
+
+bool cmFunctionBlocker::IsFunctionBlocked(const cmListFileFunction& lff,
+                                          cmExecutionStatus& status)
+{
+  if (lff.Name.Lower == this->StartCommandName()) {
+    this->ScopeDepth++;
+  } else if (lff.Name.Lower == this->EndCommandName()) {
+    this->ScopeDepth--;
+    if (this->ScopeDepth == 0U) {
+      cmMakefile& mf = status.GetMakefile();
+      auto self = mf.RemoveFunctionBlocker();
+      assert(self.get() == this);
+
+      if (!this->ArgumentsMatch(lff, mf)) {
+        cmListFileContext const& lfc = this->GetStartingContext();
+        cmListFileContext closingContext =
+          cmListFileContext::FromCommandContext(lff, lfc.FilePath);
+        std::ostringstream e;
+        /* clang-format off */
+        e << "A logical block opening on the line\n"
+          << "  " << lfc << "\n"
+          << "closes on the line\n"
+          << "  " << closingContext << "\n"
+          << "with mis-matching arguments.";
+        /* clang-format on */
+        mf.IssueMessage(MessageType::AUTHOR_WARNING, e.str());
+      }
+
+      return this->Replay(std::move(this->Functions), status);
+    }
+  }
+
+  this->Functions.push_back(lff);
+  return true;
+}