Merge "Implement a simple demangler."

//

// Copyright (C) 2017 The Android Open Source Project

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

//

cc_defaults {

    name: "libdemangle_defaults",

    host_supported: true,

    cflags: [

        "-Wall",

        "-Werror",

        "-Wextra",

    ],

}

cc_library {

    name: "libdemangle",

    defaults: ["libdemangle_defaults"],

    srcs: [

        "Demangler.cpp",

    ],

    local_include_dirs: [

       "include",

    ],

    export_include_dirs: [

       "include",

    ],

}

//-------------------------------------------------------------------------

// Unit Tests

//-------------------------------------------------------------------------

cc_test {

    name: "libdemangle_test",

    defaults: ["libdemangle_defaults"],

    srcs: [

        "DemangleTest.cpp",

    ],

    cflags: [

        "-O0",

        "-g",

    ],

    shared_libs: [

        "libdemangle",

    ],

}

/*

 * Copyright (C) 2017 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <stdlib.h>

#include <gtest/gtest.h>

#include <demangle.h>

#include "Demangler.h"

TEST(DemangleTest, VoidArgumentTest) {

  Demangler demangler;

  ASSERT_EQ("func()", demangler.Parse("_ZN4funcEv"));

  ASSERT_EQ("func(void&)", demangler.Parse("_ZN4funcERv"));

  ASSERT_EQ("func(void, void)", demangler.Parse("_ZN4funcEvv"));

  ASSERT_EQ("func(void*)", demangler.Parse("_ZN4funcEPv"));

  ASSERT_EQ("func(void const)", demangler.Parse("_ZN4funcEKv"));

  ASSERT_EQ("func(void volatile)", demangler.Parse("_ZN4funcEVv"));

}

TEST(DemangleTest, ArgumentModifiers) {

  Demangler demangler;

  ASSERT_EQ("func(char)", demangler.Parse("_ZN4funcEc"));

  ASSERT_EQ("func(char*)", demangler.Parse("_ZN4funcEPc"));

  ASSERT_EQ("func(char**)", demangler.Parse("_ZN4funcEPPc"));

  ASSERT_EQ("func(char***)", demangler.Parse("_ZN4funcEPPPc"));

  ASSERT_EQ("func(char&)", demangler.Parse("_ZN4funcERc"));

  ASSERT_EQ("func(char*&)", demangler.Parse("_ZN4funcERPc"));

  ASSERT_EQ("func(char&)", demangler.Parse("_ZN4funcERRc"));

  ASSERT_EQ("func(char*&*)", demangler.Parse("_ZN4funcEPRPc"));

  ASSERT_EQ("func(char**&)", demangler.Parse("_ZN4funcERRPPc"));

  ASSERT_EQ("func(char const)", demangler.Parse("_ZN4funcEKc"));

  ASSERT_EQ("func(char volatile)", demangler.Parse("_ZN4funcEVc"));

  ASSERT_EQ("func(char volatile const)", demangler.Parse("_ZN4funcEKVc"));

  ASSERT_EQ("func(char const volatile)", demangler.Parse("_ZN4funcEVKc"));

  ASSERT_EQ("func(char const* volatile&)", demangler.Parse("_ZN4funcERVPKc"));

  ASSERT_EQ("func(void, char, short)", demangler.Parse("_ZN4funcEvcs"));

  ASSERT_EQ("func(void*, char&, short&*)", demangler.Parse("_ZN4funcEPvRcPRs"));

}

TEST(DemangleTest, FunctionModifiers) {

  Demangler demangler;

  ASSERT_EQ("func() const", demangler.Parse("_ZNK4funcEv"));

  ASSERT_EQ("func() volatile", demangler.Parse("_ZNV4funcEv"));

  ASSERT_EQ("func() volatile const", demangler.Parse("_ZNKV4funcEv"));

  ASSERT_EQ("func() const volatile", demangler.Parse("_ZNVK4funcEv"));

}

TEST(DemangleTest, MultiplePartsInName) {

  Demangler demangler;

  ASSERT_EQ("one::two()", demangler.Parse("_ZN3one3twoEv"));

  ASSERT_EQ("one::two::three()", demangler.Parse("_ZN3one3two5threeEv"));

  ASSERT_EQ("one::two::three::four()", demangler.Parse("_ZN3one3two5three4fourEv"));

  ASSERT_EQ("one::two::three::four::five()", demangler.Parse("_ZN3one3two5three4four4fiveEv"));

  ASSERT_EQ("one(two::three::four::five)", demangler.Parse("_ZN3oneEN3two5three4four4fiveE"));

}

TEST(DemangleTest, AnonymousNamespace) {

  Demangler demangler;

  ASSERT_EQ("(anonymous namespace)::two()", demangler.Parse("_ZN12_GLOBAL__N_13twoEv"));

  ASSERT_EQ("one::two((anonymous namespace))", demangler.Parse("_ZN3one3twoE12_GLOBAL__N_1"));

}

TEST(DemangleTest, DestructorValues) {

  Demangler demangler;

  ASSERT_EQ("one::two::~two()", demangler.Parse("_ZN3one3twoD0Ev"));

  ASSERT_EQ("one::two::~two()", demangler.Parse("_ZN3one3twoD1Ev"));

  ASSERT_EQ("one::two::~two()", demangler.Parse("_ZN3one3twoD2Ev"));

  ASSERT_EQ("one::two::~two()", demangler.Parse("_ZN3one3twoD5Ev"));

  ASSERT_EQ("one::two::three::~three()", demangler.Parse("_ZN3one3two5threeD0Ev"));

  ASSERT_EQ("_ZN3one3twoD3Ev", demangler.Parse("_ZN3one3twoD3Ev"));

  ASSERT_EQ("_ZN3one3twoD4Ev", demangler.Parse("_ZN3one3twoD4Ev"));

  ASSERT_EQ("_ZN3one3twoD6Ev", demangler.Parse("_ZN3one3twoD6Ev"));

  ASSERT_EQ("_ZN3one3twoD7Ev", demangler.Parse("_ZN3one3twoD7Ev"));

  ASSERT_EQ("_ZN3one3twoD8Ev", demangler.Parse("_ZN3one3twoD8Ev"));

  ASSERT_EQ("_ZN3one3twoD9Ev", demangler.Parse("_ZN3one3twoD9Ev"));

  ASSERT_EQ("one::two<three::four>::~two()", demangler.Parse("_ZN3one3twoIN5three4fourEED2Ev"));

}

TEST(DemangleTest, ConstructorValues) {

  Demangler demangler;

  ASSERT_EQ("one::two::two()", demangler.Parse("_ZN3one3twoC1Ev"));

  ASSERT_EQ("one::two::two()", demangler.Parse("_ZN3one3twoC2Ev"));

  ASSERT_EQ("one::two::two()", demangler.Parse("_ZN3one3twoC3Ev"));

  ASSERT_EQ("one::two::two()", demangler.Parse("_ZN3one3twoC5Ev"));

  ASSERT_EQ("one::two::three::three()", demangler.Parse("_ZN3one3two5threeC1Ev"));

  ASSERT_EQ("_ZN3one3twoC0Ev", demangler.Parse("_ZN3one3twoC0Ev"));

  ASSERT_EQ("_ZN3one3twoC4Ev", demangler.Parse("_ZN3one3twoC4Ev"));

  ASSERT_EQ("_ZN3one3twoC6Ev", demangler.Parse("_ZN3one3twoC6Ev"));

  ASSERT_EQ("_ZN3one3twoC7Ev", demangler.Parse("_ZN3one3twoC7Ev"));

  ASSERT_EQ("_ZN3one3twoC8Ev", demangler.Parse("_ZN3one3twoC8Ev"));

  ASSERT_EQ("_ZN3one3twoC9Ev", demangler.Parse("_ZN3one3twoC9Ev"));

  ASSERT_EQ("one::two<three::four>::two()", demangler.Parse("_ZN3one3twoIN5three4fourEEC1Ev"));

}

TEST(DemangleTest, OperatorValues) {

  Demangler demangler;

  ASSERT_EQ("operator&&()", demangler.Parse("_Zaav"));

  ASSERT_EQ("operator&()", demangler.Parse("_Zadv"));

  ASSERT_EQ("operator&()", demangler.Parse("_Zanv"));

  ASSERT_EQ("operator&=()", demangler.Parse("_ZaNv"));

  ASSERT_EQ("operator=()", demangler.Parse("_ZaSv"));

  ASSERT_EQ("operator()()", demangler.Parse("_Zclv"));

  ASSERT_EQ("operator,()", demangler.Parse("_Zcmv"));

  ASSERT_EQ("operator~()", demangler.Parse("_Zcov"));

  ASSERT_EQ("operator delete[]()", demangler.Parse("_Zdav"));

  ASSERT_EQ("operator*()", demangler.Parse("_Zdev"));

  ASSERT_EQ("operator delete()", demangler.Parse("_Zdlv"));

  ASSERT_EQ("operator/()", demangler.Parse("_Zdvv"));

  ASSERT_EQ("operator/=()", demangler.Parse("_ZdVv"));

  ASSERT_EQ("operator^()", demangler.Parse("_Zeov"));

  ASSERT_EQ("operator^=()", demangler.Parse("_ZeOv"));

  ASSERT_EQ("operator==()", demangler.Parse("_Zeqv"));

  ASSERT_EQ("operator>=()", demangler.Parse("_Zgev"));

  ASSERT_EQ("operator>()", demangler.Parse("_Zgtv"));

  ASSERT_EQ("operator[]()", demangler.Parse("_Zixv"));

  ASSERT_EQ("operator<=()", demangler.Parse("_Zlev"));

  ASSERT_EQ("operator<<()", demangler.Parse("_Zlsv"));

  ASSERT_EQ("operator<<=()", demangler.Parse("_ZlSv"));

  ASSERT_EQ("operator<()", demangler.Parse("_Zltv"));

  ASSERT_EQ("operator-()", demangler.Parse("_Zmiv"));

  ASSERT_EQ("operator-=()", demangler.Parse("_ZmIv"));

  ASSERT_EQ("operator*()", demangler.Parse("_Zmlv"));

  ASSERT_EQ("operator*=()", demangler.Parse("_ZmLv"));

  ASSERT_EQ("operator--()", demangler.Parse("_Zmmv"));

  ASSERT_EQ("operator new[]()", demangler.Parse("_Znav"));

  ASSERT_EQ("operator!=()", demangler.Parse("_Znev"));

  ASSERT_EQ("operator-()", demangler.Parse("_Zngv"));

  ASSERT_EQ("operator!()", demangler.Parse("_Zntv"));

  ASSERT_EQ("operator new()", demangler.Parse("_Znwv"));

  ASSERT_EQ("operator||()", demangler.Parse("_Zoov"));

  ASSERT_EQ("operator|()", demangler.Parse("_Zorv"));

  ASSERT_EQ("operator|=()", demangler.Parse("_ZoRv"));

  ASSERT_EQ("operator->*()", demangler.Parse("_Zpmv"));

  ASSERT_EQ("operator+()", demangler.Parse("_Zplv"));

  ASSERT_EQ("operator+=()", demangler.Parse("_ZpLv"));

  ASSERT_EQ("operator++()", demangler.Parse("_Zppv"));

  ASSERT_EQ("operator+()", demangler.Parse("_Zpsv"));

  ASSERT_EQ("operator->()", demangler.Parse("_Zptv"));

  ASSERT_EQ("operator?()", demangler.Parse("_Zquv"));

  ASSERT_EQ("operator%()", demangler.Parse("_Zrmv"));

  ASSERT_EQ("operator%=()", demangler.Parse("_ZrMv"));

  ASSERT_EQ("operator>>()", demangler.Parse("_Zrsv"));

  ASSERT_EQ("operator>>=()", demangler.Parse("_ZrSv"));

  // Spot check using an operator as part of function name.

  ASSERT_EQ("operator&&()", demangler.Parse("_ZNaaEv"));

  ASSERT_EQ("operator++()", demangler.Parse("_ZNppEv"));

  ASSERT_EQ("one::operator++()", demangler.Parse("_ZN3oneppEv"));

  // Spot check using an operator in an argument name.

  ASSERT_EQ("operator+(operator|=)", demangler.Parse("_ZNpsENoRE"));

  ASSERT_EQ("operator==()", demangler.Parse("_Zeqv"));

  ASSERT_EQ("one(arg1::operator|=, arg2::operator==)",

            demangler.Parse("_ZN3oneEN4arg1oREN4arg2eqE"));

}

TEST(DemangleTest, FunctionStartsWithNumber) {

  Demangler demangler;

  ASSERT_EQ("value(char, int)", demangler.Parse("_Z5valueci"));

  ASSERT_EQ("abcdefjklmn(signed char)", demangler.Parse("_Z11abcdefjklmna"));

  ASSERT_EQ("value(one, signed char)", demangler.Parse("_Z5value3onea"));

}

TEST(DemangleTest, StdTypes) {

  Demangler demangler;

  ASSERT_EQ("std::one", demangler.Parse("_ZNSt3oneE"));

  ASSERT_EQ("std::one(std::two)", demangler.Parse("_ZNSt3oneESt3two"));

  ASSERT_EQ("std::std::one(std::two)", demangler.Parse("_ZNStSt3oneESt3two"));

  ASSERT_EQ("std()", demangler.Parse("_ZNStEv"));

  ASSERT_EQ("one::std::std::two::~two(one::std::std::two)",

            demangler.Parse("_ZN3oneStSt3twoD0ES0_"));

  ASSERT_EQ("std::allocator", demangler.Parse("_ZNSaE"));

  ASSERT_EQ("std::basic_string", demangler.Parse("_ZNSbE"));

  ASSERT_EQ("_ZNScE", demangler.Parse("_ZNScE"));

  ASSERT_EQ("std::iostream", demangler.Parse("_ZNSdE"));

  ASSERT_EQ("_ZNSeE", demangler.Parse("_ZNSeE"));

  ASSERT_EQ("_ZNSfE", demangler.Parse("_ZNSfE"));

  ASSERT_EQ("_ZNSgE", demangler.Parse("_ZNSgE"));

  ASSERT_EQ("_ZNShE", demangler.Parse("_ZNShE"));

  ASSERT_EQ("std::istream", demangler.Parse("_ZNSiE"));

  ASSERT_EQ("_ZNSjE", demangler.Parse("_ZNSjE"));

  ASSERT_EQ("_ZNSkE", demangler.Parse("_ZNSkE"));

  ASSERT_EQ("_ZNSlE", demangler.Parse("_ZNSlE"));

  ASSERT_EQ("_ZNSmE", demangler.Parse("_ZNSmE"));

  ASSERT_EQ("_ZNSnE", demangler.Parse("_ZNSnE"));

  ASSERT_EQ("std::ostream", demangler.Parse("_ZNSoE"));

  ASSERT_EQ("_ZNSpE", demangler.Parse("_ZNSpE"));

  ASSERT_EQ("_ZNSqE", demangler.Parse("_ZNSqE"));

  ASSERT_EQ("_ZNSrE", demangler.Parse("_ZNSrE"));

  ASSERT_EQ("std::string", demangler.Parse("_ZNSsE"));

  ASSERT_EQ("_ZNSuE", demangler.Parse("_ZNSuE"));

  ASSERT_EQ("_ZNSvE", demangler.Parse("_ZNSvE"));

  ASSERT_EQ("_ZNSwE", demangler.Parse("_ZNSwE"));

  ASSERT_EQ("_ZNSxE", demangler.Parse("_ZNSxE"));

  ASSERT_EQ("_ZNSyE", demangler.Parse("_ZNSyE"));

  ASSERT_EQ("_ZNSzE", demangler.Parse("_ZNSzE"));

}

TEST(DemangleTest, SingleLetterArguments) {

  Demangler demangler;

  ASSERT_EQ("func(signed char)", demangler.Parse("_ZN4funcEa"));

  ASSERT_EQ("func(bool)", demangler.Parse("_ZN4funcEb"));

  ASSERT_EQ("func(char)", demangler.Parse("_ZN4funcEc"));

  ASSERT_EQ("func(double)", demangler.Parse("_ZN4funcEd"));

  ASSERT_EQ("func(long double)", demangler.Parse("_ZN4funcEe"));

  ASSERT_EQ("func(float)", demangler.Parse("_ZN4funcEf"));

  ASSERT_EQ("func(__float128)", demangler.Parse("_ZN4funcEg"));

  ASSERT_EQ("func(unsigned char)", demangler.Parse("_ZN4funcEh"));

  ASSERT_EQ("func(int)", demangler.Parse("_ZN4funcEi"));

  ASSERT_EQ("func(unsigned int)", demangler.Parse("_ZN4funcEj"));

  ASSERT_EQ("_ZN4funcEk", demangler.Parse("_ZN4funcEk"));

  ASSERT_EQ("func(long)", demangler.Parse("_ZN4funcEl"));

  ASSERT_EQ("func(unsigned long)", demangler.Parse("_ZN4funcEm"));

  ASSERT_EQ("func(__int128)", demangler.Parse("_ZN4funcEn"));

  ASSERT_EQ("func(unsigned __int128)", demangler.Parse("_ZN4funcEo"));

  ASSERT_EQ("_ZN4funcEp", demangler.Parse("_ZN4funcEp"));

  ASSERT_EQ("_ZN4funcEq", demangler.Parse("_ZN4funcEq"));

  ASSERT_EQ("_ZN4funcEr", demangler.Parse("_ZN4funcEr"));

  ASSERT_EQ("func(short)", demangler.Parse("_ZN4funcEs"));

  ASSERT_EQ("func(unsigned short)", demangler.Parse("_ZN4funcEt"));

  ASSERT_EQ("_ZN4funcEu", demangler.Parse("_ZN4funcEu"));

  ASSERT_EQ("func()", demangler.Parse("_ZN4funcEv"));

  ASSERT_EQ("func(wchar_t)", demangler.Parse("_ZN4funcEw"));

  ASSERT_EQ("func(long long)", demangler.Parse("_ZN4funcEx"));

  ASSERT_EQ("func(unsigned long long)", demangler.Parse("_ZN4funcEy"));

  ASSERT_EQ("func(...)", demangler.Parse("_ZN4funcEz"));

}

TEST(DemangleTest, DArguments) {

  Demangler demangler;

  ASSERT_EQ("func(auto)", demangler.Parse("_ZN4funcEDa"));

  ASSERT_EQ("_ZN4funcEDb", demangler.Parse("_ZN4funcEDb"));

  ASSERT_EQ("_ZN4funcEDc", demangler.Parse("_ZN4funcEDc"));

  ASSERT_EQ("func(decimal64)", demangler.Parse("_ZN4funcEDd"));

  ASSERT_EQ("func(decimal128)", demangler.Parse("_ZN4funcEDe"));

  ASSERT_EQ("func(decimal32)", demangler.Parse("_ZN4funcEDf"));

  ASSERT_EQ("_ZN4funcEDg", demangler.Parse("_ZN4funcEDg"));

  ASSERT_EQ("func(half)", demangler.Parse("_ZN4funcEDh"));

  ASSERT_EQ("func(char32_t)", demangler.Parse("_ZN4funcEDi"));

  ASSERT_EQ("_ZN4funcEDj", demangler.Parse("_ZN4funcEDj"));

  ASSERT_EQ("_ZN4funcEDk", demangler.Parse("_ZN4funcEDk"));

  ASSERT_EQ("_ZN4funcEDl", demangler.Parse("_ZN4funcEDl"));

  ASSERT_EQ("_ZN4funcEDm", demangler.Parse("_ZN4funcEDm"));

  ASSERT_EQ("func(decltype(nullptr))", demangler.Parse("_ZN4funcEDn"));

  ASSERT_EQ("_ZN4funcEDo", demangler.Parse("_ZN4funcEDo"));

  ASSERT_EQ("_ZN4funcEDp", demangler.Parse("_ZN4funcEDp"));

  ASSERT_EQ("_ZN4funcEDq", demangler.Parse("_ZN4funcEDq"));

  ASSERT_EQ("_ZN4funcEDr", demangler.Parse("_ZN4funcEDr"));

  ASSERT_EQ("func(char16_t)", demangler.Parse("_ZN4funcEDs"));

  ASSERT_EQ("_ZN4funcEDt", demangler.Parse("_ZN4funcEDt"));

  ASSERT_EQ("_ZN4funcEDu", demangler.Parse("_ZN4funcEDu"));

  ASSERT_EQ("_ZN4funcEDv", demangler.Parse("_ZN4funcEDv"));

  ASSERT_EQ("_ZN4funcEDw", demangler.Parse("_ZN4funcEDw"));

  ASSERT_EQ("_ZN4funcEDx", demangler.Parse("_ZN4funcEDx"));

  ASSERT_EQ("_ZN4funcEDy", demangler.Parse("_ZN4funcEDy"));

  ASSERT_EQ("_ZN4funcEDz", demangler.Parse("_ZN4funcEDz"));

}

TEST(DemangleTest, FunctionArguments) {

  Demangler demangler;

  ASSERT_EQ("func(char ())", demangler.Parse("_ZN4funcEFcvE"));

  ASSERT_EQ("func(char (*)())", demangler.Parse("_ZN4funcEPFcvE"));

  ASSERT_EQ("func(char (&)())", demangler.Parse("_ZN4funcERFcvE"));

  ASSERT_EQ("func(char (&)())", demangler.Parse("_ZN4funcERFcvE"));

  ASSERT_EQ("func(char (*&)())", demangler.Parse("_ZN4funcERPFcvE"));

  ASSERT_EQ("func(char (*)(int) const)", demangler.Parse("_ZN4funcEPKFciE"));

  ASSERT_EQ("func(char (&)() const)", demangler.Parse("_ZN4funcERKFcvE"));

  ASSERT_EQ("func(char (&)() volatile)", demangler.Parse("_ZN4funcERVFcvE"));

  ASSERT_EQ("func(char (&)() volatile const)", demangler.Parse("_ZN4funcERKVFcvE"));

  ASSERT_EQ("func(char (&)() const volatile)", demangler.Parse("_ZN4funcERVKFcvE"));

  ASSERT_EQ("func(char (&)(int, signed char) const)", demangler.Parse("_ZN4funcERKFciaE"));

  ASSERT_EQ("fake(char (&* volatile const)(void, void, signed char), signed char)",

            demangler.Parse("_ZN4fakeEKVPRFcvvaEa"));

}

TEST(DemangleTest, TemplateFunction) {

  Demangler demangler;

  ASSERT_EQ("one<char>", demangler.Parse("_ZN3oneIcEE"));

  ASSERT_EQ("one<void>", demangler.Parse("_ZN3oneIvEE"));

  ASSERT_EQ("one<void*>", demangler.Parse("_ZN3oneIPvEE"));

  ASSERT_EQ("one<void const>", demangler.Parse("_ZN3oneIKvEE"));

  ASSERT_EQ("one<char, int, bool>", demangler.Parse("_ZN3oneIcibEE"));

  ASSERT_EQ("one::two<three>", demangler.Parse("_ZN3one3twoIN5threeEEE"));

  ASSERT_EQ("one<char, int, two::three>", demangler.Parse("_ZN3oneIciN3two5threeEEE"));

  // Template within templates.

  ASSERT_EQ("one::two<three<char, int>>", demangler.Parse("_ZN3one3twoIN5threeIciEEEE"));

  ASSERT_EQ("one::two<three<char, four<int>>>", demangler.Parse("_ZN3one3twoIN5threeIcN4fourIiEEEEEE"));

}

TEST(DemangleTest, TemplateArguments) {

  Demangler demangler;

  ASSERT_EQ("one(two<char>)", demangler.Parse("_ZN3oneE3twoIcE"));

  ASSERT_EQ("one(two<char, void>)", demangler.Parse("_ZN3oneE3twoIcvE"));

  ASSERT_EQ("one(two<char, void, three<four, int>>)",

            demangler.Parse("_ZN3oneE3twoIcv5threeI4fouriEE"));

}

TEST(DemangleTest, SubstitutionUnderscore) {

  Demangler demangler;

  ASSERT_EQ("a::a", demangler.Parse("_ZN1aS_E"));

  ASSERT_EQ("one::one", demangler.Parse("_ZN3oneS_E"));

  ASSERT_EQ("one::two::one", demangler.Parse("_ZN3one3twoS_E"));

  ASSERT_EQ("one::two::three::one", demangler.Parse("_ZN3one3two5threeS_E"));

  ASSERT_EQ("one::two(one)", demangler.Parse("_ZN3one3twoES_"));

  ASSERT_EQ("one::two(three::one)", demangler.Parse("_ZN3one3twoEN5threeS_E"));

  // Special case that St is part of the saved value used in the substitution.

  ASSERT_EQ("std::one::std::one", demangler.Parse("_ZNSt3oneS_E"));

  // Multiple substitutions in the string.

  ASSERT_EQ("one::one(one, one)", demangler.Parse("_ZN3oneS_ES_S_"));

  ASSERT_EQ("std::one::two::std::one(std::one)", demangler.Parse("_ZNSt3one3twoS_ES_"));

}

TEST(DemangleTest, SubstitutionByNumber) {

  Demangler demangler;

  // Basic substitution.

  ASSERT_EQ("a::b::c(a::b)", demangler.Parse("_ZN1a1b1cES0_"));

  ASSERT_EQ("_ZN1a1b1cES1_", demangler.Parse("_ZN1a1b1cES1_"));

  ASSERT_EQ("a::b::c::d(a::b::c)", demangler.Parse("_ZN1a1b1c1dES1_"));

  ASSERT_EQ("a::b::c::d::e::f::g::h::i::j::k::l::m::n::o::p::q(a::b::c::d::e::f::g::h::i::j::k::l)",

            demangler.Parse("_ZN1a1b1c1d1e1f1g1h1i1j1k1l1m1n1o1p1qESA_"));

  ASSERT_EQ("a::b::c::d::e::f::g::h::i::j::k::l::m::n::o::p::q(a::b::c::d::e::f::g::h::i::j::k::l::m)",

            demangler.Parse("_ZN1a1b1c1d1e1f1g1h1i1j1k1l1m1n1o1p1qESB_"));

  // Verify argument modifiers are included in substitution list.

  ASSERT_EQ("one::two(char&* volatile const, char&)", demangler.Parse("_ZN3one3twoEKVPRcS0_"));

  ASSERT_EQ("one::two(char&* volatile const, char&*)", demangler.Parse("_ZN3one3twoEKVPRcS1_"));

  ASSERT_EQ("one::two(char&* volatile const, char&* volatile const)",

            demangler.Parse("_ZN3one3twoEKVPRcS2_"));

  ASSERT_EQ("one::two(int&* volatile* const, int&)", demangler.Parse("_ZN3one3twoEKPVPRiS0_"));

  ASSERT_EQ("one::two(int&* volatile const, int&*)", demangler.Parse("_ZN3one3twoEKVPRiS1_"));

  ASSERT_EQ("one::two(int&* volatile const, int&* volatile const)",

            demangler.Parse("_ZN3one3twoEKVPRiS2_"));

  // Verify Constructor/Destructor does properly save from function name.

  ASSERT_EQ("_ZN1a1bES0_", demangler.Parse("_ZN1a1bES0_"));

  ASSERT_EQ("a::b::b(a::b)", demangler.Parse("_ZN1a1bC1ES0_"));

  ASSERT_EQ("a::b::~b(a::b)", demangler.Parse("_ZN1a1bD0ES0_"));

  // Make sure substitution values are not saved.

  ASSERT_EQ("a::b::b(a::b, char*, char*)", demangler.Parse("_ZN1a1bC1ES0_PcS1_"));

}

TEST(DemangleTest, ComplexSubstitution) {

  Demangler demangler;

  ASSERT_EQ("one::two<one::three>::two()", demangler.Parse("_ZN3one3twoINS_5threeEEC1Ev"));

  ASSERT_EQ("one::two::two(one::two const&, bool, one::three*)",

            demangler.Parse("_ZN3one3twoC2ERKS0_bPNS_5threeE"));

  ASSERT_EQ("one::two::three::four<one::five>::~four(one::two*)",

            demangler.Parse("_ZN3one3two5three4fourINS_4fiveEED2EPS0_"));

  ASSERT_EQ("one::two::three::four<one::five>::~four(one::two::three*)",

            demangler.Parse("_ZN3one3two5three4fourINS_4fiveEED2EPS1_"));

  ASSERT_EQ("one::two::three::four<one::five>::~four(one::two::three::four*)",

            demangler.Parse("_ZN3one3two5three4fourINS_4fiveEED2EPS2_"));

  ASSERT_EQ("one::two::three::four<one::five>::~four(one::five*)",

            demangler.Parse("_ZN3one3two5three4fourINS_4fiveEED2EPS3_"));

}

TEST(DemangleTest, StringTooLong) {

  Demangler demangler;

  ASSERT_EQ("_ZN3one3twoC2ERKS0_bPNS_5threeE",

            demangler.Parse("_ZN3one3twoC2ERKS0_bPNS_5threeE", 10));

  ASSERT_EQ("_ZN3one3twoC2ERKS0_bPNS_5threeE",

            demangler.Parse("_ZN3one3twoC2ERKS0_bPNS_5threeE", 30));

  ASSERT_EQ("one::two::two(one::two const&, bool, one::three*)",

            demangler.Parse("_ZN3one3twoC2ERKS0_bPNS_5threeE", 31));

  // Check the length check only occurs after the two letter value

  // has been processed.

  ASSERT_EQ("one::two(auto)", demangler.Parse("_ZN3one3twoEDa", 15));

  ASSERT_EQ("one::two(auto)", demangler.Parse("_ZN3one3twoEDa", 14));

  ASSERT_EQ("one::two(auto)", demangler.Parse("_ZN3one3twoEDa", 13));

  ASSERT_EQ("_ZN3one3twoEDa", demangler.Parse("_ZN3one3twoEDa", 12));

}

TEST(DemangleTest, demangle) {

  std::string str;

  str = demangle("_ZN1a1b1cES0_");

  ASSERT_EQ("a::b::c(a::b)", str);

  str = demangle("_");

  ASSERT_EQ("_", str);

  str = demangle("_Z");

  ASSERT_EQ("_Z", str);

  str = demangle("_Za");

  ASSERT_EQ("_Za", str);

  str = demangle("_Zaa");

  ASSERT_EQ("operator&&", str);

  str = demangle("Xa");

  ASSERT_EQ("Xa", str);

}