[clang] Handle variable templates in `isInstantiated` and `isInTemplateInstantiation` matchers (PR #110666)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff b8b036a7fe5b6e7ec306e3b80367e22d157a492b d30b8c9893479482eec7e1cd43bf8ebc5196d042 --extensions cpp,h -- clang/include/clang/ASTMatchers/ASTMatchers.h clang/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/include/clang/ASTMatchers/ASTMatchers.h b/clang/include/clang/ASTMatchers/ASTMatchers.h
index 2ba3542ec1..1b8757f422 100644
--- a/clang/include/clang/ASTMatchers/ASTMatchers.h
+++ b/clang/include/clang/ASTMatchers/ASTMatchers.h
@@ -6770,10 +6770,9 @@ AST_MATCHER_FUNCTION(internal::Matcher<Decl>, isInstantiated) {
 ///   will NOT match j += 42; as it's shared between the template definition and
 ///   instantiation.
 AST_MATCHER_FUNCTION(internal::Matcher<Stmt>, isInTemplateInstantiation) {
-  return stmt(
-      hasAncestor(decl(anyOf(cxxRecordDecl(isTemplateInstantiation()),
-                             functionDecl(isTemplateInstantiation()),
-                             varDecl(isTemplateInstantiation())))));
+  return stmt(hasAncestor(decl(anyOf(cxxRecordDecl(isTemplateInstantiation()),
+                                     functionDecl(isTemplateInstantiation()),
+                                     varDecl(isTemplateInstantiation())))));
 }
 
 /// Matches explicit template specializations of function, class, or
diff --git a/clang/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp b/clang/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp
index 6147dbd37d..65904a1891 100644
--- a/clang/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp
+++ b/clang/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp
@@ -3313,15 +3313,13 @@ TEST_P(ASTMatchersTest,
                          declStmt(isInTemplateInstantiation())));
 }
 
-
 TEST_P(ASTMatchersTest, IsInstantiated_MatchesVariableInstantiation) {
   if (!GetParam().isCXX14OrLater()) {
     return;
   }
 
-  EXPECT_TRUE(
-      matches("template<typename T> int V = 10; void x() { V<int>; }",
-              varDecl(isInstantiated())));
+  EXPECT_TRUE(matches("template<typename T> int V = 10; void x() { V<int>; }",
+                      varDecl(isInstantiated())));
 }
 
 TEST_P(ASTMatchersTest, IsInstantiated_NotMatchesVariableDefinition) {
@@ -3339,9 +3337,9 @@ TEST_P(ASTMatchersTest,
     return;
   }
 
-  EXPECT_TRUE(
-      matches("template<typename T> auto V = []() { T i; }; void x() { V<int>(); }",
-              declStmt(isInTemplateInstantiation())));
+  EXPECT_TRUE(matches(
+      "template<typename T> auto V = []() { T i; }; void x() { V<int>(); }",
+      declStmt(isInTemplateInstantiation())));
 }
 
 TEST_P(ASTMatchersTest,

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https://github.com/llvm/llvm-project/pull/110666