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[asan-asm-instrumentation] CFI directives are generated for .S files.
[oota-llvm.git] / unittests / Support / YAMLIOTest.cpp
diff --git a/unittests/Support/YAMLIOTest.cpp b/unittests/Support/YAMLIOTest.cpp
index 8ae05f4b60681c725fb9f53fffed2cefdcffa7f8..074e27f8318dc53736574d64fc5d6f4a6bee78a7 100644 (file)
--- a/unittests/Support/YAMLIOTest.cpp
+++ b/unittests/Support/YAMLIOTest.cpp
@@ -27,6 +27,13 @@ using llvm::yaml::Hex32;
 using llvm::yaml::Hex64;
 
 
+
+
+static void suppressErrorMessages(const llvm::SMDiagnostic &, void *) {
+}
+
+
+
 //===----------------------------------------------------------------------===//
 //  Test MappingTraits
 //===----------------------------------------------------------------------===//
@@ -58,14 +65,31 @@ namespace yaml {
 //
 TEST(YAMLIO, TestMapRead) {
   FooBar doc;
-  Input yin("---\nfoo:  3\nbar:  5\n...\n");
-  yin >> doc;
+  {
+    Input yin("---\nfoo:  3\nbar:  5\n...\n");
+    yin >> doc;
 
-  EXPECT_FALSE(yin.error());
-  EXPECT_EQ(doc.foo, 3);
-  EXPECT_EQ(doc.bar,5);
+    EXPECT_FALSE(yin.error());
+    EXPECT_EQ(doc.foo, 3);
+    EXPECT_EQ(doc.bar, 5);
+  }
+
+  {
+    Input yin("{foo: 3, bar: 5}");
+    yin >> doc;
+
+    EXPECT_FALSE(yin.error());
+    EXPECT_EQ(doc.foo, 3);
+    EXPECT_EQ(doc.bar, 5);
+  }
 }
 
+TEST(YAMLIO, TestMalformedMapRead) {
+  FooBar doc;
+  Input yin("{foo: 3; bar: 5}", nullptr, suppressErrorMessages);
+  yin >> doc;
+  EXPECT_TRUE(!!yin.error());
+}
 
 //
 // Test the reading of a yaml sequence of mappings
@@ -130,6 +154,7 @@ TEST(YAMLIO, TestSequenceMapWriteAndRead) {
 
 struct BuiltInTypes {
   llvm::StringRef str;
+  std::string stdstr;
   uint64_t        u64;
   uint32_t        u32;
   uint16_t        u16;
@@ -153,6 +178,7 @@ namespace yaml {
   struct MappingTraits<BuiltInTypes> {
     static void mapping(IO &io, BuiltInTypes& bt) {
       io.mapRequired("str",      bt.str);
+      io.mapRequired("stdstr",   bt.stdstr);
       io.mapRequired("u64",      bt.u64);
       io.mapRequired("u32",      bt.u32);
       io.mapRequired("u16",      bt.u16);
@@ -181,6 +207,7 @@ TEST(YAMLIO, TestReadBuiltInTypes) {
   BuiltInTypes map;
   Input yin("---\n"
             "str:      hello there\n"
+            "stdstr:   hello where?\n"
             "u64:      5000000000\n"
             "u32:      4000000000\n"
             "u16:      65000\n"
@@ -201,6 +228,7 @@ TEST(YAMLIO, TestReadBuiltInTypes) {
 
   EXPECT_FALSE(yin.error());
   EXPECT_TRUE(map.str.equals("hello there"));
+  EXPECT_TRUE(map.stdstr == "hello where?");
   EXPECT_EQ(map.u64, 5000000000ULL);
   EXPECT_EQ(map.u32, 4000000000U);
   EXPECT_EQ(map.u16, 65000);
@@ -227,6 +255,7 @@ TEST(YAMLIO, TestReadWriteBuiltInTypes) {
   {
     BuiltInTypes map;
     map.str = "one two";
+    map.stdstr = "three four";
     map.u64 = 6000000000ULL;
     map.u32 = 3000000000U;
     map.u16 = 50000;
@@ -255,6 +284,7 @@ TEST(YAMLIO, TestReadWriteBuiltInTypes) {
 
     EXPECT_FALSE(yin.error());
     EXPECT_TRUE(map.str.equals("one two"));
+    EXPECT_TRUE(map.stdstr == "three four");
     EXPECT_EQ(map.u64,      6000000000ULL);
     EXPECT_EQ(map.u32,      3000000000U);
     EXPECT_EQ(map.u16,      50000);
@@ -279,6 +309,23 @@ struct StringTypes {
   llvm::StringRef str3;
   llvm::StringRef str4;
   llvm::StringRef str5;
+  llvm::StringRef str6;
+  llvm::StringRef str7;
+  llvm::StringRef str8;
+  llvm::StringRef str9;
+  llvm::StringRef str10;
+  llvm::StringRef str11;
+  std::string stdstr1;
+  std::string stdstr2;
+  std::string stdstr3;
+  std::string stdstr4;
+  std::string stdstr5;
+  std::string stdstr6;
+  std::string stdstr7;
+  std::string stdstr8;
+  std::string stdstr9;
+  std::string stdstr10;
+  std::string stdstr11;
 };
 
 namespace llvm {
@@ -291,6 +338,23 @@ namespace yaml {
       io.mapRequired("str3",      st.str3);
       io.mapRequired("str4",      st.str4);
       io.mapRequired("str5",      st.str5);
+      io.mapRequired("str6",      st.str6);
+      io.mapRequired("str7",      st.str7);
+      io.mapRequired("str8",      st.str8);
+      io.mapRequired("str9",      st.str9);
+      io.mapRequired("str10",     st.str10);
+      io.mapRequired("str11",     st.str11);
+      io.mapRequired("stdstr1",   st.stdstr1);
+      io.mapRequired("stdstr2",   st.stdstr2);
+      io.mapRequired("stdstr3",   st.stdstr3);
+      io.mapRequired("stdstr4",   st.stdstr4);
+      io.mapRequired("stdstr5",   st.stdstr5);
+      io.mapRequired("stdstr6",   st.stdstr6);
+      io.mapRequired("stdstr7",   st.stdstr7);
+      io.mapRequired("stdstr8",   st.stdstr8);
+      io.mapRequired("stdstr9",   st.stdstr9);
+      io.mapRequired("stdstr10",  st.stdstr10);
+      io.mapRequired("stdstr11",  st.stdstr11);
     }
   };
 }
@@ -305,6 +369,23 @@ TEST(YAMLIO, TestReadWriteStringTypes) {
     map.str3 = "`ccc";
     map.str4 = "@ddd";
     map.str5 = "";
+    map.str6 = "0000000004000000";
+    map.str7 = "true";
+    map.str8 = "FALSE";
+    map.str9 = "~";
+    map.str10 = "0.2e20";
+    map.str11 = "0x30";
+    map.stdstr1 = "'eee";
+    map.stdstr2 = "\"fff";
+    map.stdstr3 = "`ggg";
+    map.stdstr4 = "@hhh";
+    map.stdstr5 = "";
+    map.stdstr6 = "0000000004000000";
+    map.stdstr7 = "true";
+    map.stdstr8 = "FALSE";
+    map.stdstr9 = "~";
+    map.stdstr10 = "0.2e20";
+    map.stdstr11 = "0x30";
 
     llvm::raw_string_ostream ostr(intermediate);
     Output yout(ostr);
@@ -317,6 +398,18 @@ TEST(YAMLIO, TestReadWriteStringTypes) {
   EXPECT_NE(llvm::StringRef::npos, flowOut.find("'`ccc'"));
   EXPECT_NE(llvm::StringRef::npos, flowOut.find("'@ddd'"));
   EXPECT_NE(llvm::StringRef::npos, flowOut.find("''\n"));
+  EXPECT_NE(llvm::StringRef::npos, flowOut.find("'0000000004000000'\n"));
+  EXPECT_NE(llvm::StringRef::npos, flowOut.find("'true'\n"));
+  EXPECT_NE(llvm::StringRef::npos, flowOut.find("'FALSE'\n"));
+  EXPECT_NE(llvm::StringRef::npos, flowOut.find("'~'\n"));
+  EXPECT_NE(llvm::StringRef::npos, flowOut.find("'0.2e20'\n"));
+  EXPECT_NE(llvm::StringRef::npos, flowOut.find("'0x30'\n"));
+  EXPECT_NE(std::string::npos, flowOut.find("'''eee"));
+  EXPECT_NE(std::string::npos, flowOut.find("'\"fff'"));
+  EXPECT_NE(std::string::npos, flowOut.find("'`ggg'"));
+  EXPECT_NE(std::string::npos, flowOut.find("'@hhh'"));
+  EXPECT_NE(std::string::npos, flowOut.find("''\n"));
+  EXPECT_NE(std::string::npos, flowOut.find("'0000000004000000'\n"));
 
   {
     Input yin(intermediate);
@@ -329,6 +422,13 @@ TEST(YAMLIO, TestReadWriteStringTypes) {
     EXPECT_TRUE(map.str3.equals("`ccc"));
     EXPECT_TRUE(map.str4.equals("@ddd"));
     EXPECT_TRUE(map.str5.equals(""));
+    EXPECT_TRUE(map.str6.equals("0000000004000000"));
+    EXPECT_TRUE(map.stdstr1 == "'eee");
+    EXPECT_TRUE(map.stdstr2 == "\"fff");
+    EXPECT_TRUE(map.stdstr3 == "`ggg");
+    EXPECT_TRUE(map.stdstr4 == "@hhh");
+    EXPECT_TRUE(map.stdstr5 == "");
+    EXPECT_TRUE(map.stdstr6 == "0000000004000000");
   }
 }
 
@@ -554,6 +654,7 @@ namespace yaml {
           return "malformed by";
       }
     }
+    static bool mustQuote(StringRef) { return true; }
   };
 }
 }
@@ -615,6 +716,8 @@ namespace yaml {
       value = n;
       return StringRef();
     }
+
+    static bool mustQuote(StringRef) { return false; }
   };
 }
 }
@@ -989,17 +1092,135 @@ TEST(YAMLIO, TestSequenceDocListWriteAndRead) {
   }
 }
 
+//===----------------------------------------------------------------------===//
+//  Test document tags
+//===----------------------------------------------------------------------===//
+
+struct MyDouble {
+  MyDouble() : value(0.0) { }
+  MyDouble(double x) : value(x) { }
+  double value;
+};
+
+LLVM_YAML_IS_DOCUMENT_LIST_VECTOR(MyDouble)
+
+
+namespace llvm {
+namespace yaml {
+  template <>
+  struct MappingTraits<MyDouble> {
+    static void mapping(IO &io, MyDouble &d) {
+      if (io.mapTag("!decimal", true)) {
+        mappingDecimal(io, d);
+      } else if (io.mapTag("!fraction")) {
+        mappingFraction(io, d);
+      }
+    }
+    static void mappingDecimal(IO &io, MyDouble &d) {
+      io.mapRequired("value", d.value);
+    }
+    static void mappingFraction(IO &io, MyDouble &d) {
+        double num, denom;
+        io.mapRequired("numerator",      num);
+        io.mapRequired("denominator",    denom);
+        // convert fraction to double
+        d.value = num/denom;
+    }
+  };
+ }
+}
+
+
+//
+// Test the reading of two different tagged yaml documents.
+//
+TEST(YAMLIO, TestTaggedDocuments) {
+  std::vector<MyDouble> docList;
+  Input yin("--- !decimal\nvalue:  3.0\n"
+            "--- !fraction\nnumerator:  9.0\ndenominator:  2\n...\n");
+  yin >> docList;
+  EXPECT_FALSE(yin.error());
+  EXPECT_EQ(docList.size(), 2UL);
+  EXPECT_EQ(docList[0].value, 3.0);
+  EXPECT_EQ(docList[1].value, 4.5);
+}
+
+
+
+//
+// Test writing then reading back tagged documents
+//
+TEST(YAMLIO, TestTaggedDocumentsWriteAndRead) {
+  std::string intermediate;
+  {
+    MyDouble a(10.25);
+    MyDouble b(-3.75);
+    std::vector<MyDouble> docList;
+    docList.push_back(a);
+    docList.push_back(b);
+
+    llvm::raw_string_ostream ostr(intermediate);
+    Output yout(ostr);
+    yout << docList;
+  }
+
+  {
+    Input yin(intermediate);
+    std::vector<MyDouble> docList2;
+    yin >> docList2;
+
+    EXPECT_FALSE(yin.error());
+    EXPECT_EQ(docList2.size(), 2UL);
+    EXPECT_EQ(docList2[0].value, 10.25);
+    EXPECT_EQ(docList2[1].value, -3.75);
+  }
+}
+
 
 //===----------------------------------------------------------------------===//
-//  Test error handling
+//  Test mapping validation
 //===----------------------------------------------------------------------===//
 
+struct MyValidation {
+  double value;
+};
 
+LLVM_YAML_IS_DOCUMENT_LIST_VECTOR(MyValidation)
 
-static void suppressErrorMessages(const llvm::SMDiagnostic &, void *) {
+namespace llvm {
+namespace yaml {
+  template <>
+  struct MappingTraits<MyValidation> {
+    static void mapping(IO &io, MyValidation &d) {
+        io.mapRequired("value", d.value);
+    }
+    static StringRef validate(IO &io, MyValidation &d) {
+        if (d.value < 0)
+          return "negative value";
+        return StringRef();
+    }
+  };
+ }
+}
+
+
+//
+// Test that validate() is called and complains about the negative value.
+//
+TEST(YAMLIO, TestValidatingInput) {
+  std::vector<MyValidation> docList;
+  Input yin("--- \nvalue:  3.0\n"
+            "--- \nvalue:  -1.0\n...\n",
+            nullptr, suppressErrorMessages);
+  yin >> docList;
+  EXPECT_TRUE(!!yin.error());
 }
 
 
+//===----------------------------------------------------------------------===//
+//  Test error handling
+//===----------------------------------------------------------------------===//
+
 //
 // Test error handling of unknown enumerated scalar
 //
@@ -1009,10 +1230,11 @@ TEST(YAMLIO, TestColorsReadError) {
             "c1:  blue\n"
             "c2:  purple\n"
             "c3:  green\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> map;
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 
@@ -1025,11 +1247,12 @@ TEST(YAMLIO, TestFlagsReadError) {
             "f1:  [ big ]\n"
             "f2:  [ round, hollow ]\n"
             "f3:  []\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> map;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 
@@ -1043,11 +1266,12 @@ TEST(YAMLIO, TestReadBuiltInTypesUint8Error) {
             "- 255\n"
             "- 0\n"
             "- 257\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 
@@ -1061,11 +1285,12 @@ TEST(YAMLIO, TestReadBuiltInTypesUint16Error) {
             "- 65535\n"
             "- 0\n"
             "- 66000\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 
@@ -1079,11 +1304,12 @@ TEST(YAMLIO, TestReadBuiltInTypesUint32Error) {
             "- 4000000000\n"
             "- 0\n"
             "- 5000000000\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 
@@ -1097,11 +1323,12 @@ TEST(YAMLIO, TestReadBuiltInTypesUint64Error) {
             "- 18446744073709551615\n"
             "- 0\n"
             "- 19446744073709551615\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 
@@ -1116,11 +1343,12 @@ TEST(YAMLIO, TestReadBuiltInTypesint8OverError) {
             "- 0\n"
             "- 127\n"
             "- 128\n"
-           "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+           "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 //
@@ -1133,11 +1361,12 @@ TEST(YAMLIO, TestReadBuiltInTypesint8UnderError) {
             "- 0\n"
             "- 127\n"
             "- -129\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 
@@ -1152,11 +1381,12 @@ TEST(YAMLIO, TestReadBuiltInTypesint16UnderError) {
             "- 0\n"
             "- -32768\n"
             "- -32769\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 
@@ -1170,11 +1400,12 @@ TEST(YAMLIO, TestReadBuiltInTypesint16OverError) {
             "- 0\n"
             "- -32768\n"
             "- 32768\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 
@@ -1189,11 +1420,12 @@ TEST(YAMLIO, TestReadBuiltInTypesint32UnderError) {
             "- 0\n"
             "- -2147483648\n"
             "- -2147483649\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 //
@@ -1206,11 +1438,12 @@ TEST(YAMLIO, TestReadBuiltInTypesint32OverError) {
             "- 0\n"
             "- -2147483648\n"
             "- 2147483649\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 
@@ -1225,11 +1458,12 @@ TEST(YAMLIO, TestReadBuiltInTypesint64UnderError) {
             "- 0\n"
             "- 9223372036854775807\n"
             "- -9223372036854775809\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 //
@@ -1242,11 +1476,12 @@ TEST(YAMLIO, TestReadBuiltInTypesint64OverError) {
             "- 0\n"
             "- 9223372036854775807\n"
             "- 9223372036854775809\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 //
@@ -1260,11 +1495,12 @@ TEST(YAMLIO, TestReadBuiltInTypesFloatError) {
             "- 1000.1\n"
             "- -123.456\n"
             "- 1.2.3\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 //
@@ -1278,11 +1514,12 @@ TEST(YAMLIO, TestReadBuiltInTypesDoubleError) {
             "- 1000.1\n"
             "- -123.456\n"
             "- 1.2.3\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 //
@@ -1295,11 +1532,12 @@ TEST(YAMLIO, TestReadBuiltInTypesHex8Error) {
             "- 0x12\n"
             "- 0xFE\n"
             "- 0x123\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 
@@ -1313,11 +1551,12 @@ TEST(YAMLIO, TestReadBuiltInTypesHex16Error) {
             "- 0x0012\n"
             "- 0xFEFF\n"
             "- 0x12345\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 //
@@ -1330,11 +1569,12 @@ TEST(YAMLIO, TestReadBuiltInTypesHex32Error) {
             "- 0x0012\n"
             "- 0xFEFF0000\n"
             "- 0x1234556789\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
 }
 
 //
@@ -1347,11 +1587,29 @@ TEST(YAMLIO, TestReadBuiltInTypesHex64Error) {
             "- 0x0012\n"
             "- 0xFFEEDDCCBBAA9988\n"
             "- 0x12345567890ABCDEF0\n"
-            "...\n");
-  yin.setDiagHandler(suppressErrorMessages);
+            "...\n",
+            /*Ctxt=*/nullptr,
+            suppressErrorMessages);
   yin >> seq;
 
-  EXPECT_TRUE(yin.error());
+  EXPECT_TRUE(!!yin.error());
+}
+
+TEST(YAMLIO, TestMalformedMapFailsGracefully) {
+  FooBar doc;
+  {
+    // We pass the suppressErrorMessages handler to handle the error
+    // message generated in the constructor of Input.
+    Input yin("{foo:3, bar: 5}", /*Ctxt=*/nullptr, suppressErrorMessages);
+    yin >> doc;
+    EXPECT_TRUE(!!yin.error());
+  }
+
+  {
+    Input yin("---\nfoo:3\nbar: 5\n...\n", /*Ctxt=*/nullptr, suppressErrorMessages);
+    yin >> doc;
+    EXPECT_TRUE(!!yin.error());
+  }
 }
 
 struct OptionalTest {
@@ -1417,3 +1675,26 @@ TEST(YAMLIO, SequenceElideTest) {
 
   EXPECT_TRUE(Seq2.Tests[3].Numbers.empty());
 }
+
+TEST(YAMLIO, TestEmptyStringFailsForMapWithRequiredFields) {
+  FooBar doc;
+  Input yin("");
+  yin >> doc;
+  EXPECT_TRUE(!!yin.error());
+}
+
+TEST(YAMLIO, TestEmptyStringSucceedsForMapWithOptionalFields) {
+  OptionalTest doc;
+  Input yin("");
+  yin >> doc;
+  EXPECT_FALSE(yin.error());
+}
+
+TEST(YAMLIO, TestEmptyStringSucceedsForSequence) {
+  std::vector<uint8_t> seq;
+  Input yin("", /*Ctxt=*/nullptr, suppressErrorMessages);
+  yin >> seq;
+
+  EXPECT_FALSE(yin.error());
+  EXPECT_TRUE(seq.empty());
+}
C/C++ LLVM-based compilers that forbids OOTA behaviors