1 files changed, 51 insertions, 0 deletions
diff --git a/build/clang-plugin/NonMemMovableTemplateArgChecker.cpp b/build/clang-plugin/NonMemMovableTemplateArgChecker.cpp
new file mode 100644
index 0000000000..65afe21006
--- /dev/null
+++ b/build/clang-plugin/NonMemMovableTemplateArgChecker.cpp
@@ -0,0 +1,51 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "NonMemMovableTemplateArgChecker.h"
+#include "CustomMatchers.h"
+
+void NonMemMovableTemplateArgChecker::registerMatchers(
+    MatchFinder *AstMatcher) {
+  // Handle non-mem-movable template specializations
+  AstMatcher->addMatcher(
+      classTemplateSpecializationDecl(
+          allOf(needsMemMovableTemplateArg(),
+                hasAnyTemplateArgument(refersToType(isNonMemMovable()))))
+          .bind("specialization"),
+      this);
+}
+
+void NonMemMovableTemplateArgChecker::check(
+    const MatchFinder::MatchResult &Result) {
+  const char *Error =
+      "Cannot instantiate %0 with non-memmovable template argument %1";
+  const char *Note = "instantiation of %0 requested here";
+
+  // Get the specialization
+  const ClassTemplateSpecializationDecl *Specialization =
+      Result.Nodes.getNodeAs<ClassTemplateSpecializationDecl>("specialization");
+  SourceLocation RequestLoc = Specialization->getPointOfInstantiation();
+
+  // Report an error for every template argument which is non-memmovable
+  const TemplateArgumentList &Args =
+      Specialization->getTemplateInstantiationArgs();
+  for (unsigned i = 0; i < Args.size(); ++i) {
+    QualType ArgType = Args[i].getAsType();
+    if (NonMemMovable.hasEffectiveAnnotation(ArgType)) {
+      diag(Specialization->getLocation(), Error, DiagnosticIDs::Error)
+          << Specialization << ArgType;
+      // XXX It would be really nice if we could get the instantiation stack
+      // information
+      // from Sema such that we could print a full template instantiation stack,
+      // however,
+      // it seems as though that information is thrown out by the time we get
+      // here so we
+      // can only report one level of template specialization (which in many
+      // cases won't
+      // be useful)
+      diag(RequestLoc, Note, DiagnosticIDs::Note) << Specialization;
+      NonMemMovable.dumpAnnotationReason(*this, ArgType, RequestLoc);
+    }
+  }
+}