From 111a3888154ad415fc98a62b8ff004959ae4dca4 Mon Sep 17 00:00:00 2001
From: Error Prone Team <java-team-github-bot@google.com>
Date: Wed, 12 Jul 2023 14:26:22 -0700
Subject: [PATCH] For NamedLikeContextualKeyword error prone check, don't alert
 on generated code from an @AutoValue or @AutoOneOf class.

PiperOrigin-RevId: 547601610
---
 .../NamedLikeContextualKeyword.java           | 16 +++++
 .../NamedLikeContextualKeywordTest.java       | 61 +++++++++++++++++++
 2 files changed, 77 insertions(+)

diff --git a/core/src/main/java/com/google/errorprone/bugpatterns/NamedLikeContextualKeyword.java b/core/src/main/java/com/google/errorprone/bugpatterns/NamedLikeContextualKeyword.java
index c8f705aff43c..715380c343f2 100644
--- a/core/src/main/java/com/google/errorprone/bugpatterns/NamedLikeContextualKeyword.java
+++ b/core/src/main/java/com/google/errorprone/bugpatterns/NamedLikeContextualKeyword.java
@@ -27,7 +27,9 @@
 import static com.google.errorprone.util.ASTHelpers.getSymbol;
 import static com.google.errorprone.util.ASTHelpers.streamSuperMethods;
 
+import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Iterables;
 import com.google.errorprone.BugPattern;
 import com.google.errorprone.ErrorProneFlags;
 import com.google.errorprone.VisitorState;
@@ -81,6 +83,10 @@ public final class NamedLikeContextualKeyword extends BugChecker
           "yield");
   private static final Matcher<MethodTree> DISALLOWED_METHOD_NAME_MATCHER =
       allOf(not(methodIsConstructor()), methodIsNamed("yield"));
+  private static final ImmutableList<String> AUTO_PROCESSORS =
+      ImmutableList.of(
+          "com.google.auto.value.processor.AutoValueProcessor",
+          "com.google.auto.value.processor.AutoOneOfProcessor");
 
   private final boolean enableMethodNames;
   private final boolean enableClassNames;
@@ -100,6 +106,12 @@ public Description matchMethod(MethodTree tree, VisitorState state) {
     }
 
     MethodSymbol methodSymbol = ASTHelpers.getSymbol(tree);
+
+    // Don't alert if an @Auto... class (safe since reference always qualified).
+    if (isInGeneratedAutoCode(state)) {
+      return NO_MATCH;
+    }
+
     // Don't alert if method is an override (this includes interfaces)
     if (!streamSuperMethods(methodSymbol, state.getTypes()).findAny().isPresent()
         && DISALLOWED_METHOD_NAME_MATCHER.matches(tree, state)) {
@@ -153,4 +165,8 @@ private static String getQualifier(
       }
     }
   }
+
+  private static boolean isInGeneratedAutoCode(VisitorState state) {
+    return Iterables.any(ASTHelpers.getGeneratedBy(state), AUTO_PROCESSORS::contains);
+  }
 }
diff --git a/core/src/test/java/com/google/errorprone/bugpatterns/NamedLikeContextualKeywordTest.java b/core/src/test/java/com/google/errorprone/bugpatterns/NamedLikeContextualKeywordTest.java
index 6eb1ebbb6d54..6ab95c19d38f 100644
--- a/core/src/test/java/com/google/errorprone/bugpatterns/NamedLikeContextualKeywordTest.java
+++ b/core/src/test/java/com/google/errorprone/bugpatterns/NamedLikeContextualKeywordTest.java
@@ -69,6 +69,67 @@ public void staticMethodName_error() {
         .doTest();
   }
 
+  @Test
+  public void autoOneOfMethodName_noError() {
+    helper
+        .addSourceLines(
+            "Test.java",
+            "import javax.annotation.processing.Generated;",
+            "@Generated(\"com.google.auto.value.processor.AutoOneOfProcessor\")",
+            "class Test  {",
+            "  static Throwable foo;",
+            "  public Test() {",
+            "  }",
+            " ",
+            "  public static void yield() { ",
+            "    foo = new NullPointerException(\"uh oh\");",
+            "  }",
+            "}")
+        .setArgs(ImmutableList.of("-XepOpt:NamedLikeContextualKeyword:EnableMethodNames"))
+        .doTest();
+  }
+
+  @Test
+  public void autoValueMethodName_noError() {
+    helper
+        .addSourceLines(
+            "Test.java",
+            "import javax.annotation.processing.Generated;",
+            "@Generated(\"com.google.auto.value.processor.AutoValueProcessor\")",
+            "class Test  {",
+            "  static Throwable foo;",
+            "  public Test() {",
+            "  }",
+            " ",
+            "  public static void yield() { ",
+            "    foo = new NullPointerException(\"uh oh\");",
+            "  }",
+            "}")
+        .setArgs(ImmutableList.of("-XepOpt:NamedLikeContextualKeyword:EnableMethodNames"))
+        .doTest();
+  }
+
+  @Test
+  public void generatedButNotAuto_error() {
+    helper
+        .addSourceLines(
+            "Test.java",
+            "import javax.annotation.processing.Generated;",
+            "@Generated(\"com.google.foo.Bar\")",
+            "class Test  {",
+            "  static Throwable foo;",
+            "  public Test() {",
+            "  }",
+            " ",
+            "  // BUG: Diagnostic contains: [NamedLikeContextualKeyword]",
+            "  public static void yield() { ",
+            "    foo = new NullPointerException(\"uh oh\");",
+            "  }",
+            "}")
+        .setArgs(ImmutableList.of("-XepOpt:NamedLikeContextualKeyword:EnableMethodNames"))
+        .doTest();
+  }
+
   @Test
   public void className_error() {
     helper