//===- unittests/AST/DeclPrinterTest.cpp --- Declaration printer tests ----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains tests for Decl::print() and related methods.
//
// Search this file for WRONG to see test cases that are producing something
// completely wrong, invalid C++ or just misleading.
//
// These tests have a coding convention:
// * declaration to be printed is named 'A' unless it should have some special
// name (e.g., 'operator+');
// * additional helper declarations are 'Z', 'Y', 'X' and so on.
//
//===----------------------------------------------------------------------===//

#include "ASTPrint.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringRef.h"
#include "gtest/gtest.h"

using namespace clang;
using namespace ast_matchers;
using namespace tooling;

namespace {

void PrintDecl(raw_ostream &Out, const ASTContext *Context, const Decl *D,
               PrintingPolicyAdjuster PolicyModifier) {
  PrintingPolicy Policy = Context->getPrintingPolicy();
  Policy.TerseOutput = true;
  Policy.Indentation = 0;
  if (PolicyModifier)
    PolicyModifier(Policy);
  D->print(Out, Policy, /*Indentation*/ 0, /*PrintInstantiation*/ false);
}

::testing::AssertionResult
PrintedDeclMatches(StringRef Code, const std::vector<std::string> &Args,
                   const DeclarationMatcher &NodeMatch,
                   StringRef ExpectedPrinted, StringRef FileName,
                   PrintingPolicyAdjuster PolicyModifier = nullptr,
                   bool AllowError = false) {
  return PrintedNodeMatches<Decl>(
      Code, Args, NodeMatch, ExpectedPrinted, FileName, PrintDecl,
      PolicyModifier, AllowError,
      // Filter out implicit decls
      [](const Decl *D) { return !D->isImplicit(); });
}

::testing::AssertionResult
PrintedDeclCXX98Matches(StringRef Code, StringRef DeclName,
                        StringRef ExpectedPrinted,
                        PrintingPolicyAdjuster PolicyModifier = nullptr) {
  std::vector<std::string> Args(1, "-std=c++98");
  return PrintedDeclMatches(Code, Args, namedDecl(hasName(DeclName)).bind("id"),
                            ExpectedPrinted, "input.cc", PolicyModifier);
}

::testing::AssertionResult
PrintedDeclCXX98Matches(StringRef Code, const DeclarationMatcher &NodeMatch,
                        StringRef ExpectedPrinted,
                        PrintingPolicyAdjuster PolicyModifier = nullptr) {
  std::vector<std::string> Args(1, "-std=c++98");
  return PrintedDeclMatches(Code,
                            Args,
                            NodeMatch,
                            ExpectedPrinted,
                            "input.cc",
                            PolicyModifier);
}

::testing::AssertionResult PrintedDeclCXX11Matches(StringRef Code,
                                                   StringRef DeclName,
                                                   StringRef ExpectedPrinted) {
  std::vector<std::string> Args(1, "-std=c++11");
  return PrintedDeclMatches(Code, Args, namedDecl(hasName(DeclName)).bind("id"),
                            ExpectedPrinted, "input.cc");
}

::testing::AssertionResult PrintedDeclCXX11Matches(
                                  StringRef Code,
                                  const DeclarationMatcher &NodeMatch,
                                  StringRef ExpectedPrinted) {
  std::vector<std::string> Args(1, "-std=c++11");
  return PrintedDeclMatches(Code,
                            Args,
                            NodeMatch,
                            ExpectedPrinted,
                            "input.cc");
}

::testing::AssertionResult PrintedDeclCXX11nonMSCMatches(
                                  StringRef Code,
                                  const DeclarationMatcher &NodeMatch,
                                  StringRef ExpectedPrinted) {
  std::vector<std::string> Args{"-std=c++11", "-fno-delayed-template-parsing"};
  return PrintedDeclMatches(Code,
                            Args,
                            NodeMatch,
                            ExpectedPrinted,
                            "input.cc");
}

::testing::AssertionResult
PrintedDeclCXX17Matches(StringRef Code, const DeclarationMatcher &NodeMatch,
                        StringRef ExpectedPrinted,
                        PrintingPolicyAdjuster PolicyModifier = nullptr) {
  std::vector<std::string> Args{"-std=c++17", "-fno-delayed-template-parsing"};
  return PrintedDeclMatches(Code, Args, NodeMatch, ExpectedPrinted, "input.cc",
                            PolicyModifier);
}

::testing::AssertionResult
PrintedDeclC11Matches(StringRef Code, const DeclarationMatcher &NodeMatch,
                      StringRef ExpectedPrinted,
                      PrintingPolicyAdjuster PolicyModifier = nullptr) {
  std::vector<std::string> Args(1, "-std=c11");
  return PrintedDeclMatches(Code, Args, NodeMatch, ExpectedPrinted, "input.c",
                            PolicyModifier);
}

::testing::AssertionResult
PrintedDeclObjCMatches(StringRef Code, const DeclarationMatcher &NodeMatch,
                       StringRef ExpectedPrinted, bool AllowError = false) {
  std::vector<std::string> Args(1, "");
  return PrintedDeclMatches(Code, Args, NodeMatch, ExpectedPrinted, "input.m",
                            /*PolicyModifier=*/nullptr, AllowError);
}

} // unnamed namespace

TEST(DeclPrinter, TestTypedef1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "typedef int A;",
    "A",
    "typedef int A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTypedef2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "typedef const char *A;",
    "A",
    "typedef const char *A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTypedef3) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template <typename Y> class X {};"
    "typedef X<int> A;",
    "A",
    "typedef X<int> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTypedef4) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "namespace X { class Y {}; }"
    "typedef X::Y A;",
    "A",
    "typedef X::Y A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestNamespace1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "namespace A { int B; }",
    "A",
    "namespace A {\n}"));
    // Should be: with { ... }
}

TEST(DeclPrinter, TestNamespace2) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "inline namespace A { int B; }",
    "A",
    "inline namespace A {\n}"));
    // Should be: with { ... }
}

TEST(DeclPrinter, TestNamespaceAlias1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "namespace Z { }"
    "namespace A = Z;",
    "A",
    "namespace A = Z"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestNamespaceAlias2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "namespace X { namespace Y {} }"
    "namespace A = X::Y;",
    "A",
    "namespace A = X::Y"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestNamespaceUnnamed) {
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "namespace { int X; }",
      namespaceDecl(has(varDecl(hasName("X")))).bind("id"),
      "namespace {\nint X;\n}",
      [](PrintingPolicy &Policy) { Policy.TerseOutput = false; }));
}

TEST(DeclPrinter, TestNamespaceUsingDirective) {
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "namespace X { namespace A {} }"
      "using namespace X::A;",
      usingDirectiveDecl().bind("id"), "using namespace X::A",
      [](PrintingPolicy &Policy) { Policy.TerseOutput = false; }));
}

TEST(DeclPrinter, TestEnumDecl1) {
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "enum A { a0, a1, a2 };", enumDecl(hasName("A")).bind("id"),
      "enum A {\na0,\na1,\na2\n}",
      [](PrintingPolicy &Policy) { Policy.TerseOutput = false; }));
}

TEST(DeclPrinter, TestEnumDecl2) {
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "enum A { a0 = -1, a1, a2 = 1 };", enumDecl(hasName("A")).bind("id"),
      "enum A {\na0 = -1,\na1,\na2 = 1\n}",
      [](PrintingPolicy &Policy) { Policy.TerseOutput = false; }));
}

TEST(DeclPrinter, TestEnumDecl3) {
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "enum { a0, a1, a2 };",
      enumDecl(has(enumConstantDecl(hasName("a0")))).bind("id"),
      "enum {\na0,\na1,\na2\n}",
      [](PrintingPolicy &Policy) { Policy.TerseOutput = false; }));
}

TEST(DeclPrinter, TestEnumDecl4) {
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "enum class A { a0, a1, a2 };", enumDecl(hasName("A")).bind("id"),
      "enum class A : int {\na0,\na1,\na2\n}",
      [](PrintingPolicy &Policy) { Policy.TerseOutput = false; }));
}

TEST(DeclPrinter, TestRecordDecl1) {
  ASSERT_TRUE(PrintedDeclC11Matches(
      "struct A { int a; };", recordDecl(hasName("A")).bind("id"),
      "struct A {\nint a;\n}",
      [](PrintingPolicy &Policy) { Policy.TerseOutput = false; }));
}

TEST(DeclPrinter, TestRecordDecl2) {
  ASSERT_TRUE(PrintedDeclC11Matches(
      "struct A { struct { int i; }; };", recordDecl(hasName("A")).bind("id"),
      "struct A {\nstruct {\nint i;\n};\n}",
      [](PrintingPolicy &Policy) { Policy.TerseOutput = false; }));
}

TEST(DeclPrinter, TestRecordDecl3) {
  ASSERT_TRUE(PrintedDeclC11Matches(
      "union { int A; } u;",
      recordDecl(has(fieldDecl(hasName("A")))).bind("id"), "union {\nint A;\n}",
      [](PrintingPolicy &Policy) { Policy.TerseOutput = false; }));
}

TEST(DeclPrinter, TestCXXRecordDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "class A { int a; };",
    "A",
    "class A {}"));
}

TEST(DeclPrinter, TestCXXRecordDecl2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A { int a; };",
    "A",
    "struct A {}"));
}

TEST(DeclPrinter, TestCXXRecordDecl3) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "union A { int a; };",
    "A",
    "union A {}"));
}

TEST(DeclPrinter, TestCXXRecordDecl4) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "class Z { int a; };"
    "class A : Z { int b; };",
    "A",
    "class A : Z {}"));
}

TEST(DeclPrinter, TestCXXRecordDecl5) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z { int a; };"
    "struct A : Z { int b; };",
    "A",
    "struct A : Z {}"));
}

TEST(DeclPrinter, TestCXXRecordDecl6) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "class Z { int a; };"
    "class A : public Z { int b; };",
    "A",
    "class A : public Z {}"));
}

TEST(DeclPrinter, TestCXXRecordDecl7) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "class Z { int a; };"
    "class A : protected Z { int b; };",
    "A",
    "class A : protected Z {}"));
}

TEST(DeclPrinter, TestCXXRecordDecl8) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "class Z { int a; };"
    "class A : private Z { int b; };",
    "A",
    "class A : private Z {}"));
}

TEST(DeclPrinter, TestCXXRecordDecl9) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "class Z { int a; };"
    "class A : virtual Z { int b; };",
    "A",
    "class A : virtual Z {}"));
}

TEST(DeclPrinter, TestCXXRecordDecl10) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "class Z { int a; };"
    "class A : virtual public Z { int b; };",
    "A",
    "class A : virtual public Z {}"));
}

TEST(DeclPrinter, TestCXXRecordDecl11) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "class Z { int a; };"
    "class Y : virtual public Z { int b; };"
    "class A : virtual public Z, private Y { int c; };",
    "A",
    "class A : virtual public Z, private Y {}"));
}

TEST(DeclPrinter, TestFunctionDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "void A();",
    "A",
    "void A()"));
}

TEST(DeclPrinter, TestFreeFunctionDecl_FullyQualifiedName) {
    ASSERT_TRUE(PrintedDeclCXX98Matches(
      "void A();",
      "A",
      "void A()",
      [](PrintingPolicy &Policy){ Policy.FullyQualifiedName = true; }));
}

TEST(DeclPrinter, TestFreeFunctionDeclInNamespace_FullyQualifiedName) {
    ASSERT_TRUE(PrintedDeclCXX98Matches(
      "namespace X { void A(); };",
      "A",
      "void X::A()",
      [](PrintingPolicy &Policy){ Policy.FullyQualifiedName = true; }));
}

TEST(DeclPrinter, TestMemberFunction_FullyQualifiedName) {
    ASSERT_TRUE(PrintedDeclCXX98Matches(
      "struct X { void A(); };",
      "A",
      "void X::A()",
      [](PrintingPolicy &Policy){ Policy.FullyQualifiedName = true; }));
}

TEST(DeclPrinter, TestMemberFunctionInNamespace_FullyQualifiedName) {
    ASSERT_TRUE(PrintedDeclCXX98Matches(
      "namespace Z { struct X { void A(); }; }",
      "A",
      "void Z::X::A()",
      [](PrintingPolicy &Policy){ Policy.FullyQualifiedName = true; }));
}

TEST(DeclPrinter, TestMemberFunctionOutside_FullyQualifiedName) {
    ASSERT_TRUE(PrintedDeclCXX98Matches(
      "struct X { void A(); };"
       "void X::A() {}",
      functionDecl(hasName("A"), isDefinition()).bind("id"),
      "void X::A()",
      [](PrintingPolicy &Policy){ Policy.FullyQualifiedName = true; }));
}

TEST(DeclPrinter, TestFunctionDecl2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "void A() {}",
    "A",
    "void A()"));
}

TEST(DeclPrinter, TestFunctionDecl3) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "void Z();"
    "void A() { Z(); }",
    "A",
    "void A()"));
}

TEST(DeclPrinter, TestFunctionDecl4) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "extern void A();",
    "A",
    "extern void A()"));
}

TEST(DeclPrinter, TestFunctionDecl5) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "static void A();",
    "A",
    "static void A()"));
}

TEST(DeclPrinter, TestFunctionDecl6) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "inline void A();",
    "A",
    "inline void A()"));
}

TEST(DeclPrinter, TestFunctionDecl7) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "constexpr int A(int a);",
    "A",
    "constexpr int A(int a)"));
}

TEST(DeclPrinter, TestFunctionDecl8) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "void A(int a);",
    "A",
    "void A(int a)"));
}

TEST(DeclPrinter, TestFunctionDecl9) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "void A(...);",
    "A",
    "void A(...)"));
}

TEST(DeclPrinter, TestFunctionDecl10) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "void A(int a, ...);",
    "A",
    "void A(int a, ...)"));
}

TEST(DeclPrinter, TestFunctionDecl11) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "typedef long ssize_t;"
    "typedef int *pInt;"
    "void A(int a, pInt b, ssize_t c);",
    "A",
    "void A(int a, pInt b, ssize_t c)"));
}

TEST(DeclPrinter, TestFunctionDecl12) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "void A(int a, int b = 0);",
    "A",
    "void A(int a, int b = 0)"));
}

TEST(DeclPrinter, TestFunctionDecl13) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "void (*A(int a))(int b);",
    "A",
    "void (*A(int a))(int)"));
    // Should be: with parameter name (?)
}

TEST(DeclPrinter, TestFunctionDecl14) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T>"
    "void A(T t) { }"
    "template<>"
    "void A(int N) { }",
    functionDecl(hasName("A"), isExplicitTemplateSpecialization()).bind("id"),
    "template<> void A<int>(int N)"));
}


TEST(DeclPrinter, TestCXXConstructorDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A {"
    "  A();"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "A()"));
}

TEST(DeclPrinter, TestCXXConstructorDecl2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A {"
    "  A(int a);"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "A(int a)"));
}

TEST(DeclPrinter, TestCXXConstructorDecl3) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A {"
    "  A(const A &a);"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "A(const A &a)"));
}

TEST(DeclPrinter, TestCXXConstructorDecl4) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A {"
    "  A(const A &a, int = 0);"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "A(const A &a, int = 0)"));
}

TEST(DeclPrinter, TestCXXConstructorDeclWithMemberInitializer) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A {"
    "  int m;"
    "  A() : m(2) {}"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "A()"));
}

TEST(DeclPrinter, TestCXXConstructorDeclWithMemberInitializer_NoTerseOutput) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A {"
    "  int m;"
    "  A() : m(2) {}"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "A() : m(2) {\n}\n",
    [](PrintingPolicy &Policy){ Policy.TerseOutput = false; }));
}

TEST(DeclPrinter, TestCXXConstructorDecl5) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "struct A {"
    "  A(const A &&a);"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "A(const A &&a)"));
}

TEST(DeclPrinter, TestCXXConstructorDecl6) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A {"
    "  explicit A(int a);"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "explicit A(int a)"));
}

TEST(DeclPrinter, TestCXXConstructorDecl7) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "struct A {"
    "  constexpr A();"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "constexpr A()"));
}

TEST(DeclPrinter, TestCXXConstructorDecl8) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "struct A {"
    "  A() = default;"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "A() = default"));
}

TEST(DeclPrinter, TestCXXConstructorDecl9) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "struct A {"
    "  A() = delete;"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "A() = delete"));
}

TEST(DeclPrinter, TestCXXConstructorDecl10) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "template<typename... T>"
    "struct A {"
    "  A(const A &a);"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "A<T...>(const A<T...> &a)"));
}

TEST(DeclPrinter, TestCXXConstructorDecl11) {
  ASSERT_TRUE(PrintedDeclCXX11nonMSCMatches(
    "template<typename... T>"
    "struct A : public T... {"
    "  A(T&&... ts) : T(ts)... {}"
    "};",
    cxxConstructorDecl(ofClass(hasName("A"))).bind("id"),
    "A<T...>(T &&...ts)"));
}

TEST(DeclPrinter, TestCXXDestructorDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A {"
    "  ~A();"
    "};",
    cxxDestructorDecl(ofClass(hasName("A"))).bind("id"),
    "~A()"));
}

TEST(DeclPrinter, TestCXXDestructorDecl2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A {"
    "  virtual ~A();"
    "};",
    cxxDestructorDecl(ofClass(hasName("A"))).bind("id"),
    "virtual ~A()"));
}

TEST(DeclPrinter, TestCXXConversionDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A {"
    "  operator int();"
    "};",
    cxxMethodDecl(ofClass(hasName("A"))).bind("id"),
    "operator int()"));
}

TEST(DeclPrinter, TestCXXConversionDecl2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct A {"
    "  operator bool();"
    "};",
    cxxMethodDecl(ofClass(hasName("A"))).bind("id"),
    "operator bool()"));
}

TEST(DeclPrinter, TestCXXConversionDecl3) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {};"
    "struct A {"
    "  operator Z();"
    "};",
    cxxMethodDecl(ofClass(hasName("A"))).bind("id"),
    "operator Z()"));
}

TEST(DeclPrinter, TestCXXMethodDecl_AllocationFunction1) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "namespace std { typedef decltype(sizeof(int)) size_t; }"
    "struct Z {"
    "  void *operator new(std::size_t);"
    "};",
    cxxMethodDecl(ofClass(hasName("Z"))).bind("id"),
    "void *operator new(std::size_t)"));
}

TEST(DeclPrinter, TestCXXMethodDecl_AllocationFunction2) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "namespace std { typedef decltype(sizeof(int)) size_t; }"
    "struct Z {"
    "  void *operator new[](std::size_t);"
    "};",
    cxxMethodDecl(ofClass(hasName("Z"))).bind("id"),
    "void *operator new[](std::size_t)"));
}

TEST(DeclPrinter, TestCXXMethodDecl_AllocationFunction3) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "struct Z {"
    "  void operator delete(void *);"
    "};",
    cxxMethodDecl(ofClass(hasName("Z"))).bind("id"),
    "void operator delete(void *) noexcept"));
    // Should be: without noexcept?
}

TEST(DeclPrinter, TestCXXMethodDecl_AllocationFunction4) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {"
    "  void operator delete(void *);"
    "};",
    cxxMethodDecl(ofClass(hasName("Z"))).bind("id"),
    "void operator delete(void *)"));
}

TEST(DeclPrinter, TestCXXMethodDecl_AllocationFunction5) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "struct Z {"
    "  void operator delete[](void *);"
    "};",
    cxxMethodDecl(ofClass(hasName("Z"))).bind("id"),
    "void operator delete[](void *) noexcept"));
    // Should be: without noexcept?
}

TEST(DeclPrinter, TestCXXMethodDecl_Operator1) {
  const char *OperatorNames[] = {
    "+",  "-",  "*",  "/",  "%",  "^",   "&",   "|",
    "=",  "<",  ">",  "+=", "-=", "*=",  "/=",  "%=",
    "^=", "&=", "|=", "<<", ">>", ">>=", "<<=", "==",  "!=",
    "<=", ">=", "&&", "||",  ",", "->*",
    "()", "[]"
  };

  for (unsigned i = 0, e = llvm::array_lengthof(OperatorNames); i != e; ++i) {
    SmallString<128> Code;
    Code.append("struct Z { void operator");
    Code.append(OperatorNames[i]);
    Code.append("(Z z); };");

    SmallString<128> Expected;
    Expected.append("void operator");
    Expected.append(OperatorNames[i]);
    Expected.append("(Z z)");

    ASSERT_TRUE(PrintedDeclCXX98Matches(
      Code,
      cxxMethodDecl(ofClass(hasName("Z"))).bind("id"),
      Expected));
  }
}

TEST(DeclPrinter, TestCXXMethodDecl_Operator2) {
  const char *OperatorNames[] = {
    "~", "!", "++", "--", "->"
  };

  for (unsigned i = 0, e = llvm::array_lengthof(OperatorNames); i != e; ++i) {
    SmallString<128> Code;
    Code.append("struct Z { void operator");
    Code.append(OperatorNames[i]);
    Code.append("(); };");

    SmallString<128> Expected;
    Expected.append("void operator");
    Expected.append(OperatorNames[i]);
    Expected.append("()");

    ASSERT_TRUE(PrintedDeclCXX98Matches(
      Code,
      cxxMethodDecl(ofClass(hasName("Z"))).bind("id"),
      Expected));
  }
}

TEST(DeclPrinter, TestCXXMethodDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {"
    "  void A(int a);"
    "};",
    "A",
    "void A(int a)"));
}

TEST(DeclPrinter, TestCXXMethodDecl2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {"
    "  virtual void A(int a);"
    "};",
    "A",
    "virtual void A(int a)"));
}

TEST(DeclPrinter, TestCXXMethodDecl3) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {"
    "  virtual void A(int a);"
    "};"
    "struct ZZ : Z {"
    "  void A(int a);"
    "};",
    "ZZ::A",
    "void A(int a)"));
    // TODO: should we print "virtual"?
}

TEST(DeclPrinter, TestCXXMethodDecl4) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {"
    "  inline void A(int a);"
    "};",
    "A",
    "inline void A(int a)"));
}

TEST(DeclPrinter, TestCXXMethodDecl5) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {"
    "  virtual void A(int a) = 0;"
    "};",
    "A",
    "virtual void A(int a) = 0"));
}

TEST(DeclPrinter, TestCXXMethodDecl_CVQualifier1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {"
    "  void A(int a) const;"
    "};",
    "A",
    "void A(int a) const"));
}

TEST(DeclPrinter, TestCXXMethodDecl_CVQualifier2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {"
    "  void A(int a) volatile;"
    "};",
    "A",
    "void A(int a) volatile"));
}

TEST(DeclPrinter, TestCXXMethodDecl_CVQualifier3) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {"
    "  void A(int a) const volatile;"
    "};",
    "A",
    "void A(int a) const volatile"));
}

TEST(DeclPrinter, TestCXXMethodDecl_RefQualifier1) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "struct Z {"
    "  void A(int a) &;"
    "};",
    "A",
    "void A(int a) &"));
}

TEST(DeclPrinter, TestCXXMethodDecl_RefQualifier2) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "struct Z {"
    "  void A(int a) &&;"
    "};",
    "A",
    "void A(int a) &&"));
}

TEST(DeclPrinter, TestFunctionDecl_ExceptionSpecification1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {"
    "  void A(int a) throw();"
    "};",
    "A",
    "void A(int a) throw()"));
}

TEST(DeclPrinter, TestFunctionDecl_ExceptionSpecification2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z {"
    "  void A(int a) throw(int);"
    "};",
    "A",
    "void A(int a) throw(int)"));
}

TEST(DeclPrinter, TestFunctionDecl_ExceptionSpecification3) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "class ZZ {};"
    "struct Z {"
    "  void A(int a) throw(ZZ, int);"
    "};",
    "A",
    "void A(int a) throw(ZZ, int)"));
}

TEST(DeclPrinter, TestFunctionDecl_ExceptionSpecification4) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "struct Z {"
    "  void A(int a) noexcept;"
    "};",
    "A",
    "void A(int a) noexcept"));
}

TEST(DeclPrinter, TestFunctionDecl_ExceptionSpecification5) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "struct Z {"
    "  void A(int a) noexcept(true);"
    "};",
    "A",
    "void A(int a) noexcept(trueA(int a) noexcept(true)"));
    // WRONG; Should be: "void A(int a) noexcept(true);"
}

TEST(DeclPrinter, TestFunctionDecl_ExceptionSpecification6) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "struct Z {"
    "  void A(int a) noexcept(1 < 2);"
    "};",
    "A",
    "void A(int a) noexcept(1 < 2A(int a) noexcept(1 < 2)"));
    // WRONG; Should be: "void A(int a) noexcept(1 < 2);"
}

TEST(DeclPrinter, TestFunctionDecl_ExceptionSpecification7) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "template<int N>"
    "struct Z {"
    "  void A(int a) noexcept(N < 2);"
    "};",
    "A",
    "void A(int a) noexcept(N < 2A(int a) noexcept(N < 2)"));
    // WRONG; Should be: "void A(int a) noexcept(N < 2);"
}

TEST(DeclPrinter, TestVarDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "char *const (*(*A)[5])(int);",
    "A",
    "char *const (*(*A)[5])(int)"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestVarDecl2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "void (*A)() throw(int);",
    "A",
    "void (*A)() throw(int)"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestVarDecl3) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "void (*A)() noexcept;",
    "A",
    "void (*A)() noexcept"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestFieldDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T>"
    "struct Z { T A; };",
    "A",
    "T A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestFieldDecl2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<int N>"
    "struct Z { int A[N]; };",
    "A",
    "int A[N]"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestClassTemplateDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T>"
    "struct A { T a; };",
    classTemplateDecl(hasName("A")).bind("id"),
    "template <typename T> struct A {}"));
}

TEST(DeclPrinter, TestClassTemplateDecl2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T = int>"
    "struct A { T a; };",
    classTemplateDecl(hasName("A")).bind("id"),
    "template <typename T = int> struct A {}"));
}

TEST(DeclPrinter, TestClassTemplateDecl3) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<class T>"
    "struct A { T a; };",
    classTemplateDecl(hasName("A")).bind("id"),
    "template <class T> struct A {}"));
}

TEST(DeclPrinter, TestClassTemplateDecl4) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T, typename U>"
    "struct A { T a; U b; };",
    classTemplateDecl(hasName("A")).bind("id"),
    "template <typename T, typename U> struct A {}"));
}

TEST(DeclPrinter, TestClassTemplateDecl5) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<int N>"
    "struct A { int a[N]; };",
    classTemplateDecl(hasName("A")).bind("id"),
    "template <int N> struct A {}"));
}

TEST(DeclPrinter, TestClassTemplateDecl6) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<int N = 42>"
    "struct A { int a[N]; };",
    classTemplateDecl(hasName("A")).bind("id"),
    "template <int N = 42> struct A {}"));
}

TEST(DeclPrinter, TestClassTemplateDecl7) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "typedef int MyInt;"
    "template<MyInt N>"
    "struct A { int a[N]; };",
    classTemplateDecl(hasName("A")).bind("id"),
    "template <MyInt N> struct A {}"));
}

TEST(DeclPrinter, TestClassTemplateDecl8) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<template<typename U> class T> struct A { };",
    classTemplateDecl(hasName("A")).bind("id"),
    "template <template <typename U> class T> struct A {}"));
}

TEST(DeclPrinter, TestClassTemplateDecl9) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T> struct Z { };"
    "template<template<typename U> class T = Z> struct A { };",
    classTemplateDecl(hasName("A")).bind("id"),
    "template <template <typename U> class T> struct A {}"));
}

TEST(DeclPrinter, TestClassTemplateDecl10) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "template<typename... T>"
    "struct A { int a; };",
    classTemplateDecl(hasName("A")).bind("id"),
    "template <typename ...T> struct A {}"));
}

TEST(DeclPrinter, TestClassTemplateDecl11) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "template<typename... T>"
    "struct A : public T... { int a; };",
    classTemplateDecl(hasName("A")).bind("id"),
    "template <typename ...T> struct A : public T... {}"));
}

TEST(DeclPrinter, TestClassTemplatePartialSpecializationDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T, typename U>"
    "struct A { T a; U b; };"
    "template<typename T>"
    "struct A<T, int> { T a; };",
    classTemplateSpecializationDecl().bind("id"),
    "template <typename T> struct A<T, int> {}"));
}

TEST(DeclPrinter, TestClassTemplatePartialSpecializationDecl2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T>"
    "struct A { T a; };"
    "template<typename T>"
    "struct A<T *> { T a; };",
    classTemplateSpecializationDecl().bind("id"),
    "template <typename T> struct A<T *> {}"));
}

TEST(DeclPrinter, TestClassTemplateSpecializationDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T>"
    "struct A { T a; };"
    "template<>"
    "struct A<int> { int a; };",
    classTemplateSpecializationDecl().bind("id"),
    "template<> struct A<int> {}"));
}

TEST(DeclPrinter, TestFunctionTemplateDecl1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T>"
    "void A(T &t);",
    functionTemplateDecl(hasName("A")).bind("id"),
    "template <typename T> void A(T &t)"));
}

TEST(DeclPrinter, TestFunctionTemplateDecl2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T>"
    "void A(T &t) { }",
    functionTemplateDecl(hasName("A")).bind("id"),
    "template <typename T> void A(T &t)"));
}

TEST(DeclPrinter, TestFunctionTemplateDecl3) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "template<typename... T>"
    "void A(T... a);",
    functionTemplateDecl(hasName("A")).bind("id"),
    "template <typename ...T> void A(T ...a)"));
}

TEST(DeclPrinter, TestFunctionTemplateDecl4) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z { template<typename T> void A(T t); };",
    functionTemplateDecl(hasName("A")).bind("id"),
    "template <typename T> void A(T t)"));
}

TEST(DeclPrinter, TestFunctionTemplateDecl5) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "struct Z { template<typename T> void A(T t) {} };",
    functionTemplateDecl(hasName("A")).bind("id"),
    "template <typename T> void A(T t)"));
}

TEST(DeclPrinter, TestFunctionTemplateDecl6) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T >struct Z {"
    "  template<typename U> void A(U t) {}"
    "};",
    functionTemplateDecl(hasName("A")).bind("id"),
    "template <typename U> void A(U t)"));
}

TEST(DeclPrinter, TestUnnamedTemplateParameters) {
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "template <typename, int, template <typename, bool> class> void A();",
      functionTemplateDecl(hasName("A")).bind("id"),
      "template <typename, int, template <typename, bool> class> void A()"));
}

TEST(DeclPrinter, TestUnnamedTemplateParametersPacks) {
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "template <typename ..., int ...,"
      " template <typename ..., bool ...> class ...> void A();",
      functionTemplateDecl(hasName("A")).bind("id"),
      "template <typename ..., int ...,"
      " template <typename ..., bool ...> class ...> void A()"));
}

TEST(DeclPrinter, TestNamedTemplateParametersPacks) {
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "template <typename ...T, int ...I,"
      " template <typename ...X, bool ...B> class ...Z> void A();",
      functionTemplateDecl(hasName("A")).bind("id"),
      "template <typename ...T, int ...I,"
      " template <typename ...X, bool ...B> class ...Z> void A()"));
}

TEST(DeclPrinter, TestTemplateTemplateParameterWrittenWithTypename) {
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "template <template <typename> typename Z> void A();",
      functionTemplateDecl(hasName("A")).bind("id"),
      "template <template <typename> class Z> void A()"));
  // WRONG: We should use typename if the parameter was written with it.
}

TEST(DeclPrinter, TestTemplateArgumentList1) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T> struct Z {};"
    "struct X {};"
    "Z<X> A;",
    "A",
    "Z<X> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList2) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T, typename U> struct Z {};"
    "struct X {};"
    "typedef int Y;"
    "Z<X, Y> A;",
    "A",
    "Z<X, Y> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList3) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T> struct Z {};"
    "template<typename T> struct X {};"
    "Z<X<int> > A;",
    "A",
    "Z<X<int> > A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList4) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "template<typename T> struct Z {};"
    "template<typename T> struct X {};"
    "Z<X<int>> A;",
    "A",
    "Z<X<int>> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList5) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T> struct Z {};"
    "template<typename T> struct X { Z<T> A; };",
    "A",
    "Z<T> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList6) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<template<typename T> class U> struct Z {};"
    "template<typename T> struct X {};"
    "Z<X> A;",
    "A",
    "Z<X> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList7) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<template<typename T> class U> struct Z {};"
    "template<template<typename T> class U> struct Y {"
    "  Z<U> A;"
    "};",
    "A",
    "Z<U> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList8) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<typename T> struct Z {};"
    "template<template<typename T> class U> struct Y {"
    "  Z<U<int> > A;"
    "};",
    "A",
    "Z<U<int> > A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList9) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<unsigned I> struct Z {};"
    "Z<0> A;",
    "A",
    "Z<0> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList10) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<unsigned I> struct Z {};"
    "template<unsigned I> struct X { Z<I> A; };",
    "A",
    "Z<I> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList11) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<int I> struct Z {};"
    "Z<42 * 10 - 420 / 1> A;",
    "A",
    "Z<42 * 10 - 420 / 1> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList12) {
  ASSERT_TRUE(PrintedDeclCXX98Matches(
    "template<const char *p> struct Z {};"
    "extern const char X[] = \"aaa\";"
    "Z<X> A;",
    "A",
    "Z<X> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList13) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "template<typename... T> struct Z {};"
    "template<typename... T> struct X {"
    "  Z<T...> A;"
    "};",
    "A",
    "Z<T...> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList14) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "template<typename... T> struct Z {};"
    "template<typename T> struct Y {};"
    "template<typename... T> struct X {"
    "  Z<Y<T>...> A;"
    "};",
    "A",
    "Z<Y<T>...> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList15) {
  ASSERT_TRUE(PrintedDeclCXX11Matches(
    "template<unsigned I> struct Z {};"
    "template<typename... T> struct X {"
    "  Z<sizeof...(T)> A;"
    "};",
    "A",
    "Z<sizeof...(T)> A"));
    // Should be: with semicolon
}

TEST(DeclPrinter, TestTemplateArgumentList16) {
  llvm::StringLiteral Code = "template<typename T1, int NT1, typename T2 = "
                             "bool, int NT2 = 5> struct Z {};";
  ASSERT_TRUE(PrintedDeclCXX11Matches(Code, "T1", "typename T1"));
  ASSERT_TRUE(PrintedDeclCXX11Matches(Code, "T2", "typename T2 = bool"));
  ASSERT_TRUE(PrintedDeclCXX11Matches(Code, "NT1", "int NT1"));
  ASSERT_TRUE(PrintedDeclCXX11Matches(Code, "NT2", "int NT2 = 5"));
}

TEST(DeclPrinter, TestStaticAssert1) {
  ASSERT_TRUE(PrintedDeclCXX17Matches("static_assert(true);",
                                      staticAssertDecl().bind("id"),
                                      "static_assert(true)"));
}

TEST(DeclPrinter, TestObjCMethod1) {
  ASSERT_TRUE(PrintedDeclObjCMatches(
    "__attribute__((objc_root_class)) @interface X\n"
    "- (int)A:(id)anObject inRange:(long)range;\n"
    "@end\n"
    "@implementation X\n"
    "- (int)A:(id)anObject inRange:(long)range { int printThis; return 0; }\n"
    "@end\n",
    namedDecl(hasName("A:inRange:"),
              hasDescendant(namedDecl(hasName("printThis")))).bind("id"),
    "- (int)A:(id)anObject inRange:(long)range"));
}

TEST(DeclPrinter, TestObjCProtocol1) {
  ASSERT_TRUE(PrintedDeclObjCMatches(
    "@protocol P1, P2;",
    namedDecl(hasName("P1")).bind("id"),
    "@protocol P1;\n"));
  ASSERT_TRUE(PrintedDeclObjCMatches(
    "@protocol P1, P2;",
    namedDecl(hasName("P2")).bind("id"),
    "@protocol P2;\n"));
}

TEST(DeclPrinter, TestObjCProtocol2) {
  ASSERT_TRUE(PrintedDeclObjCMatches(
    "@protocol P2 @end"
    "@protocol P1<P2> @end",
    namedDecl(hasName("P1")).bind("id"),
    "@protocol P1<P2>\n@end"));
}

TEST(DeclPrinter, TestObjCCategoryInvalidInterface) {
  ASSERT_TRUE(PrintedDeclObjCMatches(
      "@interface I (Extension) @end",
      namedDecl(hasName("Extension")).bind("id"),
      "@interface <<error-type>>(Extension)\n@end", /*AllowError=*/true));
}

TEST(DeclPrinter, TestObjCCategoryImplInvalidInterface) {
  ASSERT_TRUE(PrintedDeclObjCMatches(
      "@implementation I (Extension) @end",
      namedDecl(hasName("Extension")).bind("id"),
      "@implementation <<error-type>>(Extension)\n@end", /*AllowError=*/true));
}

TEST(DeclPrinter, VarDeclWithInitializer) {
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "int a = 0x15;", namedDecl(hasName("a")).bind("id"), "int a = 21"));
  ASSERT_TRUE(PrintedDeclCXX17Matches(
      "int a = 0x15;", namedDecl(hasName("a")).bind("id"), "int a = 0x15",
      [](PrintingPolicy &Policy) { Policy.ConstantsAsWritten = true; }));
}