diff --git a/tools/aapt2/compile/IdAssigner_test.cpp b/tools/aapt2/compile/IdAssigner_test.cpp
index 6637766..d357571 100644
--- a/tools/aapt2/compile/IdAssigner_test.cpp
+++ b/tools/aapt2/compile/IdAssigner_test.cpp
@@ -57,18 +57,18 @@
   ASSERT_TRUE(assigner.Consume(context.get(), table.get()));
   ASSERT_TRUE(VerifyIds(table.get()));
 
-  Maybe<ResourceTable::SearchResult> maybe_result;
+  std::optional<ResourceTable::SearchResult> maybe_result;
 
   // Expect to fill in the gaps between 0x0101XXXX and 0x0104XXXX.
 
   maybe_result = table->FindResource(test::ParseNameOrDie("android:dimen/two"));
   ASSERT_TRUE(maybe_result);
-  EXPECT_EQ(make_value<ResourceId>(0x01020000), maybe_result.value().entry->id);
+  EXPECT_EQ(0x01020000, maybe_result.value().entry->id);
 
   maybe_result =
       table->FindResource(test::ParseNameOrDie("android:integer/three"));
   ASSERT_TRUE(maybe_result);
-  EXPECT_EQ(make_value<ResourceId>(0x01030000), maybe_result.value().entry->id);
+  EXPECT_EQ(0x01030000, maybe_result.value().entry->id);
 
   // Expect to bypass the reserved 0x0104XXXX IDs and use the next 0x0105XXXX
   // IDs.
@@ -76,17 +76,17 @@
   maybe_result =
       table->FindResource(test::ParseNameOrDie("android:string/five"));
   ASSERT_TRUE(maybe_result);
-  EXPECT_EQ(make_value<ResourceId>(0x01050000), maybe_result.value().entry->id);
+  EXPECT_EQ(0x01050000, maybe_result.value().entry->id);
 
   // Expect to fill in the gaps between 0x01040000 and 0x01040006.
 
   maybe_result = table->FindResource(test::ParseNameOrDie("android:attr/bar"));
   ASSERT_TRUE(maybe_result);
-  EXPECT_EQ(make_value<ResourceId>(0x01040001), maybe_result.value().entry->id);
+  EXPECT_EQ(0x01040001, maybe_result.value().entry->id);
 
   maybe_result = table->FindResource(test::ParseNameOrDie("android:attr/baz"));
   ASSERT_TRUE(maybe_result);
-  EXPECT_EQ(make_value<ResourceId>(0x01040002), maybe_result.value().entry->id);
+  EXPECT_EQ(0x01040002, maybe_result.value().entry->id);
 }
 
 TEST_F(IdAssignerTests, FailWhenNonUniqueIdsAssigned) {
@@ -143,7 +143,7 @@
   ASSERT_TRUE(result);
 
   const ResourceTable::SearchResult& search_result = result.value();
-  EXPECT_EQ(make_value<ResourceId>(0x01010002), search_result.entry->id);
+  EXPECT_EQ(0x01010002, search_result.entry->id);
 }
 
 TEST_F(IdAssignerTests, UseAllEntryIds) {
diff --git a/tools/aapt2/compile/InlineXmlFormatParser.cpp b/tools/aapt2/compile/InlineXmlFormatParser.cpp
index 79b0933..de1c3bb 100644
--- a/tools/aapt2/compile/InlineXmlFormatParser.cpp
+++ b/tools/aapt2/compile/InlineXmlFormatParser.cpp
@@ -56,7 +56,7 @@
       return;
     }
 
-    Maybe<Reference> ref = ResourceUtils::ParseXmlAttributeName(attr->value);
+    std::optional<Reference> ref = ResourceUtils::ParseXmlAttributeName(attr->value);
     if (!ref) {
       context_->GetDiagnostics()->Error(DiagMessage(src) << "invalid XML attribute '" << attr->value
                                                          << "'");
@@ -65,7 +65,7 @@
     }
 
     const ResourceName& name = ref.value().name.value();
-    Maybe<xml::ExtractedPackage> maybe_pkg = TransformPackageAlias(name.package);
+    std::optional<xml::ExtractedPackage> maybe_pkg = TransformPackageAlias(name.package);
     if (!maybe_pkg) {
       context_->GetDiagnostics()->Error(DiagMessage(src)
                                         << "invalid namespace prefix '" << name.package << "'");
diff --git a/tools/aapt2/compile/PseudolocaleGenerator.cpp b/tools/aapt2/compile/PseudolocaleGenerator.cpp
index 3f574ee..2461438 100644
--- a/tools/aapt2/compile/PseudolocaleGenerator.cpp
+++ b/tools/aapt2/compile/PseudolocaleGenerator.cpp
@@ -33,7 +33,7 @@
 // The struct that represents both Span objects and UntranslatableSections.
 struct UnifiedSpan {
   // Only present for Span objects. If not present, this was an UntranslatableSection.
-  Maybe<std::string> tag;
+  std::optional<std::string> tag;
 
   // The UTF-16 index into the string where this span starts.
   uint32_t first_char;