From 9a3bc86dc1a8901adc7ad7e01b3a5e7abb415424 Mon Sep 17 00:00:00 2001
From: dgfried <dgfried@google.com>
Date: Thu, 27 Feb 2020 12:51:45 -0800
Subject: [PATCH] Warn on boxed primitive usage in locks.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=297665455
---
 .../java/com/google/errorprone/matchers/Matchers.java     | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java b/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java
index 7d963017242..95647f656a1 100644
--- a/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java
+++ b/check_api/src/main/java/com/google/errorprone/matchers/Matchers.java
@@ -466,6 +466,13 @@ public static <T extends Tree> Matcher<T> isPrimitiveOrBoxedPrimitiveType() {
         (type, state) -> state.getTypes().unboxedTypeOrType(type).isPrimitive());
   }
 
+  /** Matches an AST node if its type is a boxed primitive type. */
+  public static Matcher<ExpressionTree> isBoxedPrimitiveType() {
+    return typePredicateMatcher(
+        (type, state) ->
+            !state.getTypes().isSameType(state.getTypes().unboxedType(type), Type.noType));
+  }
+
   /** Matches an AST node which is enclosed by a block node that matches the given matcher. */
   public static <T extends Tree> Enclosing.Block<T> enclosingBlock(Matcher<BlockTree> matcher) {
     return new Enclosing.Block<>(matcher);
@@ -1283,6 +1290,7 @@ public static boolean isThrowingFunctionalInterface(Type clazzType, VisitorState
                   .filter(Objects::nonNull)
                   .collect(toImmutableSet()));
 
+
   private static class IsDirectImplementationOf extends ChildMultiMatcher<ClassTree, Tree> {
     public IsDirectImplementationOf(Matcher<Tree> classMatcher) {
       super(MatchType.AT_LEAST_ONE, classMatcher);