[clang-tidy] Verify some conditions in a matcher instead of check(). NFC

llvm-svn: 298057
diff --git a/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp b/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp
index 1d0ea68..df21d46 100644
--- a/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp
+++ b/clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.cpp
@@ -24,8 +24,11 @@
   // provide any benefit to other languages, despite being benign.
   if (!getLangOpts().CPlusPlus)
     return;
-  Finder->addMatcher(cxxConstructorDecl(unless(isInstantiated())).bind("ctor"),
-                     this);
+  Finder->addMatcher(
+      cxxConstructorDecl(unless(anyOf(isImplicit(), // Compiler-generated.
+                                      isDeleted(), isInstantiated())))
+          .bind("ctor"),
+      this);
   Finder->addMatcher(
       cxxConversionDecl(unless(anyOf(isExplicit(), // Already marked explicit.
                                      isImplicit(), // Compiler-generated.
@@ -99,10 +102,8 @@
   }
 
   const auto *Ctor = Result.Nodes.getNodeAs<CXXConstructorDecl>("ctor");
-  // Do not be confused: isExplicit means 'explicit' keyword is present,
-  // isImplicit means that it's a compiler-generated constructor.
-  if (Ctor->isOutOfLine() || Ctor->isImplicit() || Ctor->isDeleted() ||
-      Ctor->getNumParams() == 0 || Ctor->getMinRequiredArguments() > 1)
+  if (Ctor->isOutOfLine() || Ctor->getNumParams() == 0 ||
+      Ctor->getMinRequiredArguments() > 1)
     return;
 
   bool takesInitializerList = isStdInitializerList(