/*

* Cppcheck - A tool for static C/C++ code analysis

* Copyright (C) 2007-2025 Cppcheck team.

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <http://www.gnu.org/licenses/>.

*/

#include "errortypes.h"

#include "fixture.h"

#include "helpers.h"

#include "settings.h"

#include "standards.h"

#include "templatesimplifier.h"

#include "token.h"

#include "tokenize.h"

#include "tokenlist.h"

#include <cstring>

#include <sstream>

#include <string>

#include <utility>

#include <vector>

class TestSimplifyTemplate : public TestFixture {

public:

TestSimplifyTemplate() : TestFixture("TestSimplifyTemplate") {}

private:

// If there are unused templates, keep those

const Settings settings = settingsBuilder().severity(Severity::portability).build();

void run() override {

TEST_CASE(template1);

TEST_CASE(template2);

TEST_CASE(template3);

TEST_CASE(template4);

TEST_CASE(template5);

TEST_CASE(template6);

TEST_CASE(template7);

TEST_CASE(template8);

TEST_CASE(template9);

TEST_CASE(template10);

TEST_CASE(template11);

TEST_CASE(template12);

TEST_CASE(template13);

TEST_CASE(template14);

TEST_CASE(template15); // recursive templates

TEST_CASE(template16);

TEST_CASE(template17);

TEST_CASE(template18);

TEST_CASE(template19);

TEST_CASE(template20);

TEST_CASE(template21);

TEST_CASE(template22);

TEST_CASE(template23);

TEST_CASE(template24); // #2648 - using sizeof in template parameter

TEST_CASE(template25); // #2648 - another test for sizeof template parameter

TEST_CASE(template26); // #2721 - passing 'char[2]' as template parameter

TEST_CASE(template27); // #3350 - removing unused template in macro call

TEST_CASE(template28);

TEST_CASE(template30); // #3529 - template < template < ..

TEST_CASE(template31); // #4010 - reference type

TEST_CASE(template32); // #3818 - mismatching template not handled well

TEST_CASE(template33); // #3818,#4544 - inner templates in template instantiation not handled well

TEST_CASE(template34); // #3706 - namespace => hang

TEST_CASE(template35); // #4074 - A<'x'> a;

TEST_CASE(template36); // #4310 - passing unknown template instantiation as template argument

TEST_CASE(template37); // #4544 - A<class B> a;

TEST_CASE(template38); // #4832 - crash on C++11 right angle brackets

TEST_CASE(template39); // #4742 - freeze

TEST_CASE(template40); // #5055 - template specialization outside struct

TEST_CASE(template41); // #4710 - const in instantiation not handled perfectly

TEST_CASE(template42); // #4878 - variadic templates

TEST_CASE(template43); // #5097 - assert due to '>>' not treated as end of template instantiation

TEST_CASE(template44); // #5297 - TemplateSimplifier::simplifyCalculations not eager enough

TEST_CASE(template45); // #5814 - syntax error reported for valid code

TEST_CASE(template46); // #5816 - syntax error reported for valid code

TEST_CASE(template47); // #6023 - syntax error reported for valid code

TEST_CASE(template48); // #6134 - 100% CPU upon invalid code

TEST_CASE(template49); // #6237 - template instantiation

TEST_CASE(template50); // #4272 - simple partial specialization

TEST_CASE(template52); // #6437 - crash upon valid code

TEST_CASE(template53); // #4335 - bail out for valid code

TEST_CASE(template54); // #6587 - memory corruption upon valid code

TEST_CASE(template55); // #6604 - simplify "const const" to "const" in template instantiations

TEST_CASE(template56); // #7117 - const ternary operator simplification as template parameter

TEST_CASE(template57); // #7891

TEST_CASE(template58); // #6021 - use after free (deleted tokens in simplifyCalculations)

TEST_CASE(template59); // #8051 - TemplateSimplifier::simplifyTemplateInstantiation failure

TEST_CASE(template60); // handling of methods outside template definition

TEST_CASE(template61); // daca2, kodi

TEST_CASE(template62); // #8314 - inner template instantiation

TEST_CASE(template63); // #8576 - qualified type

TEST_CASE(template64); // #8683

TEST_CASE(template65); // #8321

TEST_CASE(template66); // #8725

TEST_CASE(template67); // #8122

TEST_CASE(template68); // union

TEST_CASE(template69); // #8791

TEST_CASE(template70); // #5289

TEST_CASE(template71); // #8821

TEST_CASE(template72);

TEST_CASE(template73);

TEST_CASE(template74);

TEST_CASE(template75);

TEST_CASE(template76);

TEST_CASE(template77);

TEST_CASE(template78);

TEST_CASE(template79); // #5133

TEST_CASE(template80);

TEST_CASE(template81);

TEST_CASE(template82); // #8603

TEST_CASE(template83); // #8867

TEST_CASE(template84); // #8880

TEST_CASE(template85); // #8902 crash

TEST_CASE(template86); // crash

TEST_CASE(template87);

TEST_CASE(template88); // #6183

TEST_CASE(template89); // #8917

TEST_CASE(template90); // crash

TEST_CASE(template91);

TEST_CASE(template92);

TEST_CASE(template93); // crash

TEST_CASE(template94); // #8927 crash

TEST_CASE(template95); // #7417

TEST_CASE(template96); // #7854

TEST_CASE(template97);

TEST_CASE(template98); // #8959

TEST_CASE(template99); // #8960

TEST_CASE(template100); // #8967

TEST_CASE(template101); // #8968

TEST_CASE(template102); // #9005

TEST_CASE(template103);

TEST_CASE(template104); // #9021

TEST_CASE(template105); // #9076

TEST_CASE(template106);

TEST_CASE(template107); // #8663

TEST_CASE(template108); // #9109

TEST_CASE(template109); // #9144

TEST_CASE(template110);

TEST_CASE(template111); // crash

TEST_CASE(template112); // #9146 syntax error

TEST_CASE(template113);

TEST_CASE(template114); // #9155

TEST_CASE(template115); // #9153

TEST_CASE(template116); // #9178

TEST_CASE(template117);

TEST_CASE(template118);

TEST_CASE(template119); // #9186

TEST_CASE(template120);

TEST_CASE(template121); // #9193

TEST_CASE(template122); // #9147

TEST_CASE(template123); // #9183

TEST_CASE(template124); // #9197

TEST_CASE(template125);

TEST_CASE(template126); // #9217

TEST_CASE(template127); // #9225

TEST_CASE(template128); // #9224

TEST_CASE(template129);

TEST_CASE(template130); // #9246

TEST_CASE(template131); // #9249

TEST_CASE(template132); // #9250

TEST_CASE(template133);

TEST_CASE(template134);

TEST_CASE(template135);

TEST_CASE(template136); // #9287

TEST_CASE(template137); // #9288

TEST_CASE(template138);

TEST_CASE(template139);

TEST_CASE(template140);

TEST_CASE(template141); // #9337

TEST_CASE(template142); // #9338

TEST_CASE(template143);

TEST_CASE(template144); // #9046

TEST_CASE(template145); // syntax error

TEST_CASE(template146); // syntax error

TEST_CASE(template147); // syntax error

TEST_CASE(template148); // syntax error

TEST_CASE(template149); // unknown macro

TEST_CASE(template150); // syntax error

TEST_CASE(template151); // crash

TEST_CASE(template152); // #9467

TEST_CASE(template153); // #9483

TEST_CASE(template154); // #9495

TEST_CASE(template155); // #9539

TEST_CASE(template156);

TEST_CASE(template157); // #9854

TEST_CASE(template158); // daca crash

TEST_CASE(template159); // #9886

TEST_CASE(template160);

TEST_CASE(template161);

TEST_CASE(template162);

TEST_CASE(template163); // #9685 syntax error

TEST_CASE(template164); // #9394

TEST_CASE(template165); // #10032 syntax error

TEST_CASE(template166); // #10081 hang

TEST_CASE(template167);

TEST_CASE(template168);

TEST_CASE(template169);

TEST_CASE(template170); // crash

TEST_CASE(template171); // crash

TEST_CASE(template172); // #10258 crash

TEST_CASE(template173); // #10332 crash

TEST_CASE(template174); // #10506 hang

TEST_CASE(template175); // #10908

TEST_CASE(template176); // #11146

TEST_CASE(template177);

TEST_CASE(template178);

TEST_CASE(template179);

TEST_CASE(template180);

TEST_CASE(template181);

TEST_CASE(template182); // #13770

TEST_CASE(template_specialization_1); // #7868 - template specialization template <typename T> struct S<C<T>> {..};

TEST_CASE(template_specialization_2); // #7868 - template specialization template <typename T> struct S<C<T>> {..};

TEST_CASE(template_specialization_3);

TEST_CASE(template_enum); // #6299 Syntax error in complex enum declaration (including template)

TEST_CASE(template_unhandled);

TEST_CASE(template_default_parameter);

TEST_CASE(template_forward_declared_default_parameter);

TEST_CASE(template_default_type);

TEST_CASE(template_typename);

TEST_CASE(template_constructor); // #3152 - template constructor is removed

TEST_CASE(syntax_error_templates_1);

TEST_CASE(template_member_ptr); // Ticket #5786 - crash upon valid code

TEST_CASE(template_namespace_1);

TEST_CASE(template_namespace_2);

TEST_CASE(template_namespace_3);

TEST_CASE(template_namespace_4);

TEST_CASE(template_namespace_5);

TEST_CASE(template_namespace_6);

TEST_CASE(template_namespace_7); // #8768

TEST_CASE(template_namespace_8);

TEST_CASE(template_namespace_9);

TEST_CASE(template_namespace_10);

TEST_CASE(template_namespace_11); // #7145

TEST_CASE(template_namespace_12);

TEST_CASE(template_namespace_13);

TEST_CASE(template_pointer_type);

TEST_CASE(template_array_type);

// Test TemplateSimplifier::templateParameters

TEST_CASE(templateParameters);

TEST_CASE(templateNamePosition);

TEST_CASE(findTemplateDeclarationEnd);

TEST_CASE(getTemplateParametersInDeclaration);

TEST_CASE(expandSpecialized1);

TEST_CASE(expandSpecialized2);

TEST_CASE(expandSpecialized3); // #8671

TEST_CASE(expandSpecialized4);

TEST_CASE(expandSpecialized5); // #10494

TEST_CASE(templateAlias1);

TEST_CASE(templateAlias2);

TEST_CASE(templateAlias3); // #8315

TEST_CASE(templateAlias4); // #9070

TEST_CASE(templateAlias5);

// Test TemplateSimplifier::instantiateMatch

TEST_CASE(instantiateMatchTest);

TEST_CASE(templateParameterWithoutName); // #8602 Template default parameter without name yields syntax error

TEST_CASE(templateTypeDeduction1); // #8962

TEST_CASE(templateTypeDeduction2);

TEST_CASE(templateTypeDeduction3);

TEST_CASE(templateTypeDeduction4); // #9983

TEST_CASE(templateTypeDeduction5);

TEST_CASE(simplifyTemplateArgs1);

TEST_CASE(simplifyTemplateArgs2);

TEST_CASE(simplifyTemplateArgs3);

TEST_CASE(template_variadic_1); // #9144

TEST_CASE(template_variadic_2); // #4349

TEST_CASE(template_variadic_3); // #6172

TEST_CASE(template_variadic_4);

TEST_CASE(template_variable_1);

TEST_CASE(template_variable_2);

TEST_CASE(template_variable_3);

TEST_CASE(template_variable_4);

TEST_CASE(simplifyDecltype);

TEST_CASE(castInExpansion);

TEST_CASE(fold_expression_1);

TEST_CASE(fold_expression_2);

TEST_CASE(fold_expression_3);

TEST_CASE(fold_expression_4);

TEST_CASE(concepts1);

TEST_CASE(requires1);

TEST_CASE(requires2);

TEST_CASE(requires3);

TEST_CASE(requires4);

TEST_CASE(requires5);

TEST_CASE(explicitBool1);

TEST_CASE(explicitBool2);

TEST_CASE(templateArgPreserveType); // #13882 - type of template argument

}

struct CheckOptions

{

CheckOptions() = default;

bool debugwarnings = false;

};

#define tok(...) tok_(__FILE__, __LINE__, __VA_ARGS__)

template<size_t size>

std::string tok_(const char* file, int line, const char (&code)[size], const CheckOptions& options = make_default_obj()) {

const Settings settings1 = settingsBuilder(settings).library("std.cfg").debugwarnings(options.debugwarnings).build();

SimpleTokenizer tokenizer(settings1, *this);

ASSERT_LOC(tokenizer.tokenize(code), file, line);

return tokenizer.tokens()->stringifyList(nullptr, true);

}

void template1() {

const char code[] = "template <class T> T f(T val) { T a; }\n"

"f<int>(10);";

const char expected[] = "int f<int> ( int val ) ; "

"f<int> ( 10 ) ; "

"int f<int> ( int val ) { int a ; }";

ASSERT_EQUALS(expected, tok(code));

}

void template2() {

const char code[] = "template <class T> class Fred { T a; };\n"

"Fred<int> fred;";

const char expected[] = "class Fred<int> ; "

"Fred<int> fred ; "

"class Fred<int> { int a ; } ;";

ASSERT_EQUALS(expected, tok(code));

}

void template3() {

const char code[] = "template <class T, int sz> class Fred { T data[sz]; };\n"

"Fred<float,4> fred;";

const char expected[] = "class Fred<float,4> ; "

"Fred<float,4> fred ; "

"class Fred<float,4> { float data [ 4 ] ; } ;";

ASSERT_EQUALS(expected, tok(code));

}

void template4() {

const char code[] = "template <class T> class Fred { Fred(); };\n"

"Fred<float> fred;";

const char expected[] = "class Fred<float> ; "

"Fred<float> fred ; "

"class Fred<float> { Fred<float> ( ) ; } ;";

ASSERT_EQUALS(expected, tok(code));

}

void template5() {

const char code[] = "template <class T> class Fred { };\n"

"template <class T> Fred<T>::Fred() { }\n"

"Fred<float> fred;";

const char expected[] = "class Fred<float> ; "

"Fred<float> fred ; "

"class Fred<float> { } ; "

"Fred<float> :: Fred<float> ( ) { }";

ASSERT_EQUALS(expected, tok(code));

}

void template6() {

const char code[] = "template <class T> class Fred { };\n"

"Fred<float> fred1;\n"

"Fred<float> fred2;";

const char expected[] = "class Fred<float> ; "

"Fred<float> fred1 ; "

"Fred<float> fred2 ; "

"class Fred<float> { } ;";

ASSERT_EQUALS(expected, tok(code));

}

void template7() {

// A template class that is not used => no simplification

{

const char code[] = "template <class T>\n"

"class ABC\n"

"{\n"

"public:\n"

" typedef ABC<T> m;\n"

"};\n";

const char expected[] = "template < class T > class ABC { public: } ;";

ASSERT_EQUALS(expected, tok(code));

}

{

const char code[] = "template <typename T> class ABC {\n"

"public:\n"

" typedef std::vector<T> type;\n"

"};\n"

"int main() {\n"

" ABC<int>::type v;\n"

" v.push_back(4);\n"

" return 0;\n"

"}\n";

const char wanted[] = "class ABC<int> ; "

"int main ( ) { "

"std :: vector < int > v ; "

"v . push_back ( 4 ) ; "

"return 0 ; "

"} "

"class ABC<int> { public: } ;";

const char current[] = "class ABC<int> ; "

"int main ( ) { "

"ABC<int> :: type v ; "

"v . push_back ( 4 ) ; "

"return 0 ; "

"} "

"class ABC<int> { public: } ;";

TODO_ASSERT_EQUALS(wanted, current, tok(code));

}

{

const char code[] = "template <typename T> class ABC {\n"

"public:\n"

" typedef std::vector<T> type;\n"

" void f()\n"

" {\n"

" ABC<int>::type v;\n"

" v.push_back(4);\n"

" }\n"

"};\n";

const char expected[] = "template < typename T > class ABC { "

"public: void f ( ) { "

"ABC < int > :: type v ; "

"v . push_back ( 4 ) ; "

"} "

"} ;";

ASSERT_EQUALS(expected, tok(code));

}

}

// Template definitions but no usage => no expansion

void template8() {

const char code[] = "template<typename T> class A;\n"

"template<typename T> class B;\n"

"\n"

"typedef A<int> x;\n"

"typedef B<int> y;\n"

"\n"

"template<typename T> class A {\n"

" void f() {\n"

" B<T> a = B<T>::g();\n"

" T b = 0;\n"

" if (b)\n"

" b = 0;\n"

" }\n"

"};\n"

"\n"

"template<typename T> inline B<T> h() { return B<T>(); }\n";

ASSERT_EQUALS("template < typename T > class A ; "

"template < typename T > class B ; "

"template < typename T > class A { void f ( ) { B < T > a ; a = B < T > :: g ( ) ; T b ; b = 0 ; if ( b ) { b = 0 ; } } } ; "

"template < typename T > B < T > h ( ) { return B < T > ( ) ; }", tok(code));

ASSERT_EQUALS("class A { template < typename T > int foo ( T d ) ; } ;", tok("class A{ template<typename T> int foo(T d);};"));

}

void template9() {

const char code[] = "template < typename T > class A { } ;\n"

"\n"

"void f ( ) {\n"

" A < int > a ;\n"

"}\n"

"\n"

"template < typename T >\n"

"class B {\n"

" void g ( ) {\n"

" A < T > b = A < T > :: h ( ) ;\n"

" }\n"

"} ;\n";

// The expected result..

const char expected[] = "class A<int> ; "

"void f ( ) { A<int> a ; } "

"template < typename T > class B { void g ( ) { A < T > b ; b = A < T > :: h ( ) ; } } ; "

"class A<int> { } ;";

ASSERT_EQUALS(expected, tok(code));

}

void template10() {

const char code[] = "template <int ui, typename T> T * foo()\n"

"{ return new T[ui]; }\n"

"\n"

"void f ( )\n"

"{\n"

" foo<3,int>();\n"

"}\n";

// The expected result..

const char expected[] = "int * foo<3,int> ( ) ; "

"void f ( ) "

"{"

" foo<3,int> ( ) ; "

"} "

"int * foo<3,int> ( ) { return new int [ 3 ] ; }";

ASSERT_EQUALS(expected, tok(code));

}

void template11() {

const char code[] = "template <int ui, typename T> T * foo()\n"

"{ return new T[ui]; }\n"

"\n"

"void f ( )\n"

"{\n"

" char * p = foo<3,char>();\n"

"}\n";

// The expected result..

const char expected[] = "char * foo<3,char> ( ) ; "

"void f ( ) "

"{"

" char * p ; p = foo<3,char> ( ) ; "

"} "

"char * foo<3,char> ( ) { return new char [ 3 ] ; }";

ASSERT_EQUALS(expected, tok(code));

}

void template12() {

const char code[] = "template <int x, int y, int z>\n"

"class A : public B<x, y, (x - y) ? ((y < z) ? 1 : -1) : 0>\n"

"{ };\n"

"\n"

"void f()\n"

"{\n"

" A<12,12,11> a;\n"

"}\n";

const char expected[] = "class A<12,12,11> ; "

"void f ( ) "

"{"

" A<12,12,11> a ; "

"} "

"class A<12,12,11> : public B < 12 , 12 , 0 > "

"{ } ;";

ASSERT_EQUALS(expected, tok(code));

}

void template13() {

const char code[] = "class BB {};\n"

"\n"

"template <class T>\n"

"class AA {\n"

"public:\n"

" static AA<T> create(T* newObject);\n"

" static int size();\n"

"};\n"

"\n"

"class CC { public: CC(AA<BB>, int) {} };\n"

"\n"

"class XX {\n"

" AA<CC> y;\n"

"public:\n"

" XX();\n"

"};\n"

"\n"

"XX::XX():\n"

" y(AA<CC>::create(new CC(AA<BB>(), 0)))\n"

" {}\n"

"\n"

"int yy[AA<CC>::size()];";

const char expected[] = "class BB { } ; "

"class AA<BB> ; "

"class AA<CC> ; "

"class CC { public: CC ( AA<BB> , int ) { } } ; "

"class XX { "

"AA<CC> y ; "

"public: "

"XX ( ) ; "

"} ; "

"XX :: XX ( ) : "

"y ( AA<CC> :: create ( new CC ( AA<BB> ( ) , 0 ) ) ) "

"{ } "

"int yy [ AA<CC> :: size ( ) ] ; "

"class AA<BB> { "

"public: "

"static AA<BB> create ( BB * newObject ) ; "

"static int size ( ) ; "

"} ; "

"class AA<CC> { "

"public: "

"static AA<CC> create ( CC * newObject ) ; "

"static int size ( ) ; "

"} ;";

ASSERT_EQUALS(expected, tok(code));

}

void template14() {

const char code[] = "template <> void foo<int *>()\n"

"{ x(); }\n"

"\n"

"int main()\n"

"{\n"

"foo<int*>();\n"

"}\n";

const char expected[] = "void foo<int*> ( ) ; "

"void foo<int*> ( ) "

"{ x ( ) ; } "

"int main ( ) "

"{ foo<int*> ( ) ; }";

ASSERT_EQUALS(expected, tok(code));

}

void template15() { // recursive templates #3130 etc

const char code[] = "template <unsigned int i> void a()\n"

"{\n"

" a<i-1>();\n"

"}\n"

"\n"

"template <> void a<0>()\n"

"{ }\n"

"\n"

"int main()\n"

"{\n"

" a<2>();\n"

" return 0;\n"

"}\n";

// The expected result..

const char expected[] = "void a<0> ( ) ; "

"void a<2> ( ) ; "

"void a<1> ( ) ; "

"void a<0> ( ) { } "

"int main ( ) "

"{ a<2> ( ) ; return 0 ; } "

"void a<2> ( ) { a<1> ( ) ; } "

"void a<1> ( ) { a<0> ( ) ; }";

ASSERT_EQUALS(expected, tok(code));

// #3130

const char code2[] = "template <int n> struct vec {\n"

" vec() {}\n"

" vec(const vec<n-1>& v) {}\n" // <- never used don't instantiate

"};\n"

"\n"

"vec<4> v;";

const char expected2[] = "struct vec<4> ; "

"vec<4> v ; "

"struct vec<4> { "

"vec<4> ( ) { } "

"vec<4> ( const vec < ( int ) 4 - 1 > & v ) { } "

"} ;";

ASSERT_EQUALS(expected2, tok(code2));

}

void template16() {

const char code[] = "template <unsigned int i> void a()\n"

"{ }\n"

"\n"

"template <unsigned int i> void b()\n"

"{ a<i>(); }\n"

"\n"

"int main()\n"

"{\n"

" b<2>();\n"

" return 0;\n"

"}\n";

const char expected[] = "void a<2> ( ) ; "

"void b<2> ( ) ; "

"int main ( ) { b<2> ( ) ; return 0 ; } "

"void b<2> ( ) { a<2> ( ) ; } "

"void a<2> ( ) { }";

ASSERT_EQUALS(expected, tok(code));

}

void template17() {

const char code[] = "template<class T>\n"

"class Fred\n"

"{\n"

" template<class T>\n"

" static shared_ptr< Fred<T> > CreateFred()\n"

" {\n"

" }\n"

"};\n"

"\n"

"shared_ptr<int> i;\n";

const char expected[] = "template < class T > "

"class Fred "

"{ "

"template < class T > "

"static shared_ptr < Fred < T > > CreateFred ( ) "

"{ "

"} "

"} ; "

"shared_ptr < int > i ;";

ASSERT_EQUALS(expected, tok(code));

}

void template18() {

const char code[] = "template <class T> class foo { T a; };\n"

"foo<int> *f;";

const char expected[] = "class foo<int> ; "

"foo<int> * f ; "

"class foo<int> { int a ; } ;";

ASSERT_EQUALS(expected, tok(code));

}

void template19() {

const char code[] = "template <typename T> T & foo()\n"

"{ static T temp; return temp; }\n"

"\n"

"void f ( )\n"

"{\n"

" char p = foo<char>();\n"

"}\n";

// The expected result..

const char expected[] = "char & foo<char> ( ) ; "

"void f ( ) "

"{"

" char p ; p = foo<char> ( ) ; "

"} "

"char & foo<char> ( ) { static char temp ; return temp ; }";

ASSERT_EQUALS(expected, tok(code));

}

void template20() {

// Ticket #1788 - the destructor implementation is lost

const char code[] = "template <class T> class A { public: ~A(); };\n"

"template <class T> A<T>::~A() {}\n"

"A<int> a;\n";

// The expected result..

const char expected[] = "class A<int> ; "

"A<int> a ; "

"class A<int> { public: ~ A<int> ( ) ; } ; "

"A<int> :: ~ A<int> ( ) { }";

ASSERT_EQUALS(expected, tok(code));

}

void template21() {

{

const char code[] = "template <class T> struct Fred { T a; };\n"

"Fred<int> fred;";

const char expected[] = "struct Fred<int> ; "

"Fred<int> fred ; "

"struct Fred<int> { int a ; } ;";

ASSERT_EQUALS(expected, tok(code));

}

{

const char code[] = "template <class T, int sz> struct Fred { T data[sz]; };\n"

"Fred<float,4> fred;";

const char expected[] = "struct Fred<float,4> ; "

"Fred<float,4> fred ; "

"struct Fred<float,4> { float data [ 4 ] ; } ;";

ASSERT_EQUALS(expected, tok(code));

}

{

const char code[] = "template <class T> struct Fred { Fred(); };\n"

"Fred<float> fred;";

const char expected[] = "struct Fred<float> ; "

"Fred<float> fred ; "

"struct Fred<float> { Fred<float> ( ) ; } ;";

ASSERT_EQUALS(expected, tok(code));

}

{

const char code[] = "template <class T> struct Fred { };\n"

"Fred<float> fred1;\n"

"Fred<float> fred2;";

const char expected[] = "struct Fred<float> ; "

"Fred<float> fred1 ; "

"Fred<float> fred2 ; "

"struct Fred<float> { } ;";

ASSERT_EQUALS(expected, tok(code));

}

}

void template22() {

const char code[] = "template <class T> struct Fred { T a; };\n"

"Fred<std::string> fred;";

const char expected[] = "struct Fred<std::string> ; "

"Fred<std::string> fred ; "

"struct Fred<std::string> { std :: string a ; } ;";

ASSERT_EQUALS(expected, tok(code));

}

void template23() {

const char code[] = "template <class T> void foo() { }\n"

"void bar() {\n"

" std::cout << (foo<double>());\n"

"}";

const char expected[] = "void foo<double> ( ) ; "

"void bar ( ) {"

" std :: cout << ( foo<double> ( ) ) ; "

"} "

"void foo<double> ( ) { }";

ASSERT_EQUALS(expected, tok(code));

}

void template24() {

// #2648

const char code[] = "template<int n> struct B\n"

"{\n"

" int a[n];\n"

"};\n"

"\n"

"template<int x> class bitset: B<sizeof(int)>\n"

"{};\n"

"\n"

"bitset<1> z;";

const char expected[] = "struct B<4> ; "

"class bitset<1> ; "

"bitset<1> z ; "

"class bitset<1> : B<4> { } ; "

"struct B<4> { int a [ 4 ] ; } ;";

ASSERT_EQUALS(expected, tok(code));

}

void template25() {

const char code[] = "template<int n> struct B\n"

"{\n"

" int a[n];\n"

"};\n"

"\n"

"template<int x> class bitset: B<((sizeof(int)) ? : 1)>\n"

"{};\n"

"\n"

"bitset<1> z;";

const char expected[] = "struct B<4> ; "

"class bitset<1> ; "

"bitset<1> z ; "

"class bitset<1> : B<4> { } ; "

"struct B<4> { int a [ 4 ] ; } ;";

ASSERT_EQUALS(expected, tok(code));

}

void template26() {

// #2721

const char code[] = "template<class T>\n"

"class A { public: T x; };\n"

"\n"

"template<class M>\n"

"class C: public A<char[M]> {};\n"

"\n"

"C<2> a;\n";

ASSERT_EQUALS("class A<char[2]> ; class C<2> ; C<2> a ; class C<2> : public A<char[2]> { } ; class A<char[2]> { public: char [ 2 ] x ; } ;", tok(code));

}

void template27() {

// #3350 - template inside macro call

const char code[] = "X(template<class T> class Fred);";

ASSERT_THROW_INTERNAL(tok(code), SYNTAX);

}

void template28() {

// #3226 - inner template

const char code[] = "template<class A, class B> class Fred {};\n"

"Fred<int,Fred<int,int> > x;\n";

ASSERT_EQUALS("class Fred<int,int> ; "

"class Fred<int,Fred<int,int>> ; "

"Fred<int,Fred<int,int>> x ; "

"class Fred<int,int> { } ; "

"class Fred<int,Fred<int,int>> { } ;", tok(code));

}

void template30() {

// #3529 - template < template < ..

const char code[] = "template<template<class> class A, class B> void f(){}";

ASSERT_EQUALS("template < template < class > class A , class B > void f ( ) { }", tok(code));

}

void template31() {

// #4010 - template reference type

const char code[] = "template<class T> struct A{}; A<int&> a;";

ASSERT_EQUALS("struct A<int&> ; "

"A<int&> a ; "

"struct A<int&> { } ;", tok(code));

// #7409 - rvalue

const char code2[] = "template<class T> struct A{}; A<int&&> a;";

ASSERT_EQUALS("struct A<int&&> ; "

"A<int&&> a ; "

"struct A<int&&> { } ;", tok(code2));

}

void template32() {

// #3818 - mismatching template not handled well

const char code[] = "template <class T1, class T2, class T3, class T4 > struct A { };\n"

"\n"

"template <class T>\n"

"struct B\n"

"{\n"

" public:\n"

" A < int, Pair<T, int>, int > a;\n" // mismatching parameters => don't instantiate

"};\n"

"\n"

"B<int> b;\n";

ASSERT_EQUALS("template < class T1 , class T2 , class T3 , class T4 > struct A { } ; "

"struct B<int> ; "

"B<int> b ; "

"struct B<int> { public: A < int , Pair < int , int > , int > a ; } ;", tok(code));

}

void template33() {

{

// #3818 - inner templates in template instantiation not handled well

const char code[] = "template<class T> struct A { };\n"

"template<class T> struct B { };\n"

"template<class T> struct C { A<B<X<T> > > ab; };\n"

"C<int> c;";

ASSERT_EQUALS("struct A<B<X<int>>> ; "

"struct B<X<int>> ; "

"struct C<int> ; "

"C<int> c ; "

"struct C<int> { A<B<X<int>>> ab ; } ; "

"struct B<X<int>> { } ; " // <- redundant.. but nevermind

"struct A<B<X<int>>> { } ;", tok(code));

}

{

// #4544

const char code[] = "struct A { };\n"

"template<class T> struct B { };\n"

"template<class T> struct C { };\n"

"C< B<A> > c;";

ASSERT_EQUALS("struct A { } ; "

"template < class T > struct B { } ; " // <- redundant.. but nevermind

"struct C<B<A>> ; "

"C<B<A>> c ; "

"struct C<B<A>> { } ;",

tok(code));

}

}

void template34() {

// #3706 - namespace => hang

const char code[] = "namespace abc {\n"

"template <typename T> struct X { void f(X<T> &x) {} };\n"

"}\n"

"template <> int X<int>::Y(0);";

(void)tok(code);

}

void template35() { // #4074 - "A<'x'> a;" is not recognized as template instantiation

const char code[] = "template <char c> class A {};\n"

"A <'x'> a;";

ASSERT_EQUALS("class A<'x'> ; "

"A<'x'> a ; "