Index: clang/lib/Format/UnwrappedLineParser.cpp
===================================================================
--- clang/lib/Format/UnwrappedLineParser.cpp
+++ clang/lib/Format/UnwrappedLineParser.cpp
@@ -3183,6 +3183,11 @@
     break;
   }
   default:
+    if (PreviousNonComment->isTypeOrIdentifier()) {
+      // This is a requires clause.
+      parseRequiresClause(RequiresToken);
+      return true;
+    }
     // It's an expression.
     parseRequiresExpression(RequiresToken);
     return false;
Index: clang/unittests/Format/TokenAnnotatorTest.cpp
===================================================================
--- clang/unittests/Format/TokenAnnotatorTest.cpp
+++ clang/unittests/Format/TokenAnnotatorTest.cpp
@@ -402,6 +402,33 @@
   EXPECT_TOKEN(Tokens[25], tok::less, TT_TemplateOpener);
   EXPECT_TOKEN(Tokens[27], tok::greater, TT_TemplateCloser);
   EXPECT_TOKEN(Tokens[28], tok::greater, TT_TemplateCloser);
+
+  Tokens = annotate("auto bar() -> int requires(is_integral_v<T>) {}");
+  ASSERT_EQ(Tokens.size(), 16u) << Tokens;
+  EXPECT_TOKEN(Tokens[6], tok::kw_requires, TT_RequiresClause);
+
+  Tokens = annotate("auto bar() -> void requires(is_integral_v<T>) {}");
+  ASSERT_EQ(Tokens.size(), 16u) << Tokens;
+  EXPECT_TOKEN(Tokens[6], tok::kw_requires, TT_RequiresClause);
+
+  Tokens = annotate("auto bar() -> MyType requires(is_integral_v<T>) {}");
+  ASSERT_EQ(Tokens.size(), 16u) << Tokens;
+  EXPECT_TOKEN(Tokens[6], tok::kw_requires, TT_RequiresClause);
+
+  Tokens =
+      annotate("auto bar() -> SOME_MACRO_TYPE requires(is_integral_v<T>) {}");
+  ASSERT_EQ(Tokens.size(), 16u) << Tokens;
+  EXPECT_TOKEN(Tokens[6], tok::kw_requires, TT_RequiresClause);
+
+  Tokens =
+      annotate("auto bar() -> qualified::type requires(is_integral_v<T>) {}");
+  ASSERT_EQ(Tokens.size(), 18u) << Tokens;
+  EXPECT_TOKEN(Tokens[8], tok::kw_requires, TT_RequiresClause);
+
+  Tokens =
+      annotate("auto bar() -> Template<type> requires(is_integral_v<T>) {}");
+  ASSERT_EQ(Tokens.size(), 19u) << Tokens;
+  EXPECT_TOKEN(Tokens[9], tok::kw_requires, TT_RequiresClause);
 }
 
 TEST_F(TokenAnnotatorTest, UnderstandsRequiresExpressions) {