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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2024 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
"
checkpostfixoperator.h
"
#
include
"
errortypes.h
"
#
include
"
fixture.h
"
#
include
"
helpers.h
"
#
include
"
settings.h
"
#
include
<
cstddef
>
class
TestPostfixOperator
:
public
TestFixture
{
public:
TestPostfixOperator
() : TestFixture(
"
TestPostfixOperator
"
) {}
private:
const
Settings settings = settingsBuilder().severity(Severity::performance).build();
#
define
check
(
code
) check_(code, __FILE__, __LINE__)
template
<
size_t
size>
void
check_
(
const
char
(&code)[size],
const
char* file, int line) {
//
Tokenize..
SimpleTokenizer
tokenizer
(settings, *
this
);
ASSERT_LOC
(tokenizer.
tokenize
(code), file, line);
//
Check for postfix operators..
CheckPostfixOperator
checkPostfixOperator
(&tokenizer, &settings,
this
);
checkPostfixOperator.
postfixOperator
();
}
void
run
()
override
{
TEST_CASE
(testsimple);
TEST_CASE
(testfor);
TEST_CASE
(testvolatile);
TEST_CASE
(testiterator);
TEST_CASE
(test2168);
TEST_CASE
(pointerSimplest);
TEST_CASE
(pointer);
//
#2321 - postincrement of pointer is OK
TEST_CASE
(testtemplate);
//
#4686
TEST_CASE
(testmember);
TEST_CASE
(testcomma);
TEST_CASE
(testauto);
//
#8350
}
void
testsimple
() {
check
(
"
int main()
\n
"
"
{
\n
"
"
unsigned int k(0);
\n
"
"
std::cout << k << std::endl;
\n
"
"
k++;
\n
"
"
std::cout << k << std::endl;
\n
"
"
if(k) {
\n
"
"
k++;
\n
"
"
}
\n
"
"
std::cout << k << std::endl;
\n
"
"
k--;
\n
"
"
std::cout << k << std::endl;
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
check
(
"
class K {};
"
"
int main()
\n
"
"
{
\n
"
"
K k(0);
\n
"
"
std::cout << k << std::endl;
\n
"
"
k++;
\n
"
"
std::cout << k << std::endl;
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:5]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
struct K {};
"
"
void foo()
\n
"
"
{
\n
"
"
K k(0);
\n
"
"
k++;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:4]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
struct K {};
\n
"
"
void foo(K& k)
\n
"
"
{
\n
"
"
k++;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:4]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
union K {};
"
"
void foo()
\n
"
"
{
\n
"
"
K k(0);
\n
"
"
k++;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:4]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
class K {};
"
"
int main()
\n
"
"
{
\n
"
"
K k(1);
\n
"
"
std::cout << k << std::endl;
\n
"
"
if(k) {
\n
"
"
k++;
\n
"
"
}
\n
"
"
std::cout << k << std::endl;
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:6]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
class K {};
"
"
int main()
\n
"
"
{
\n
"
"
K k(1);
\n
"
"
std::cout << k << std::endl;
\n
"
"
if(k) {
\n
"
"
++k;
\n
"
"
}
\n
"
"
k++;
\n
"
"
std::cout << k << std::endl;
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:8]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
class K {};
"
"
int main()
\n
"
"
{
\n
"
"
K k(0);
\n
"
"
std::cout << k << std::endl;
\n
"
"
k--;
\n
"
"
std::cout << k << std::endl;
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:5]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
class K {};
"
"
int main()
\n
"
"
{
\n
"
"
K k(0);
\n
"
"
std::cout << k << std::endl;
\n
"
"
++k;
\n
"
"
std::cout << k << std::endl;
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
check
(
"
class K {};
"
"
int main()
\n
"
"
{
\n
"
"
K k(0);
\n
"
"
std::cout << k << std::endl;
\n
"
"
--k;
\n
"
"
std::cout << k << std::endl;
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
//
#9042
check
(
"
template <class T>
\n
"
"
class c {
\n
"
"
int i = 0;
\n
"
"
c() { i--; }
\n
"
"
};
\n
"
"
template <class T>
\n
"
"
class s {};
\n
"
"
using BOOL = char;
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
}
void
testfor
() {
check
(
"
int main()
\n
"
"
{
\n
"
"
for ( unsigned int i=0; i <= 10; i++) {
\n
"
"
std::cout << i << std::endl;
\n
"
"
}
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
check
(
"
class K {};
\n
"
"
int main()
\n
"
"
{
\n
"
"
for ( K i(0); i <= 10; i++) {
\n
"
"
std::cout << i << std::endl;
\n
"
"
}
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:4]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
class K {};
\n
"
"
int main()
\n
"
"
{
\n
"
"
for ( K i(0); i <= 10; ++i) {
\n
"
"
std::cout << i << std::endl;
\n
"
"
}
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
check
(
"
class K {};
\n
"
"
int main()
\n
"
"
{
\n
"
"
for ( K i(10); i > 1; i--) {
\n
"
"
std::cout << i << std::endl;
\n
"
"
}
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:4]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
class K {};
\n
"
"
int main(int argc, char *argv[])
\n
"
"
{
\n
"
"
for ( K i=10; i > 1; --i) {
\n
"
"
std::cout << i << std::endl;
\n
"
"
}
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
}
void
testvolatile
() {
check
(
"
class K {};
\n
"
"
int main()
\n
"
"
{
\n
"
"
volatile K k(0);
\n
"
"
std::cout << k << std::endl;
\n
"
"
k++;
\n
"
"
std::cout << k << std::endl;
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:6]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
}
void
testiterator
() {
check
(
"
class Base {};
\n
"
"
int main() {
\n
"
"
std::vector<Base*> v;
\n
"
"
v.push_back(new Base());
\n
"
"
v.push_back(new Base());
\n
"
"
for (std::vector<Base*>::iterator i=v.begin(); i!=v.end(); i++) {
\n
"
"
;;
\n
"
"
}
\n
"
"
v.clear();
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:6]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
int main() {
\n
"
"
std::vector<int> v;
\n
"
"
std::vector<int>::iterator it;
\n
"
"
for( int i=0; i < 10; ++i ) v.push_back(i);
\n
"
"
unsigned int total = 0;
\n
"
"
it = v.begin();
\n
"
"
while( it != v.end() ) {
\n
"
"
total += *it;
\n
"
"
it++;
\n
"
"
}
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:9]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
int main() {
\n
"
"
std::vector<int> v;
\n
"
"
std::vector<int>::const_iterator it;
\n
"
"
for( int i=0; i < 10; ++i ) v.push_back(i);
\n
"
"
unsigned int total = 0;
\n
"
"
it = v.begin();
\n
"
"
while( it != v.end() ) {
\n
"
"
it++;
\n
"
"
}
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:8]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
int main() {
\n
"
"
std::vector<int> v;
\n
"
"
std::vector<int>::iterator it;
\n
"
"
for( int i=0; i < 10; ++i ) v.push_back(i);
\n
"
"
unsigned int total = 0;
\n
"
"
std::vector<int>::reverse_iterator rit;
\n
"
"
rit= v.rend();
\n
"
"
while( rit != v.rbegin() ) {
\n
"
"
rit--;
\n
"
"
}
\n
"
"
return 0;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:9]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
}
void
test2168
() {
check
(
"
--> declare allocator lock here
\n
"
"
int main(){}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
}
void
pointerSimplest
() {
check
(
"
void f(int* p){
\n
"
"
p++;
\n
"
"
std::cout << *p;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
}
void
pointer
() {
check
(
"
static struct class * ab;
\n
"
"
int * p;
\n
"
"
\n
"
"
void f() {
\n
"
"
p++;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
}
void
testtemplate
() {
check
(
"
bool foo() {
\n
"
"
std::vector<FilterConfigCacheEntry>::iterator aIter(aImport.begin());
\n
"
"
aIter++;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:3]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
}
void
testmember
() {
check
(
"
bool foo() {
\n
"
"
class A {}; class B {A a;};
\n
"
"
B b;
\n
"
"
b.a++;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:4]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
bool foo() {
\n
"
"
class A {}; class B {A a;};
\n
"
"
B b;
\n
"
"
foo(b.a++);
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
}
void
testcomma
() {
check
(
"
bool foo(int i) {
\n
"
"
class A {};
\n
"
"
A a;
\n
"
"
i++, a++;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
[test.cpp:4]: (performance) Prefer prefix ++/-- operators for non-primitive types.
\n
"
,
errout_str
());
check
(
"
bool foo(int i) {
\n
"
"
class A {};
\n
"
"
A a;
\n
"
"
foo(i, a++);
\n
"
"
foo(a++, i);
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
}
void
testauto
() {
//
#8350
check
(
"
enum class Color { Red = 0, Green = 1, };
\n
"
"
int fun(const Color color) {
\n
"
"
auto a = 0;
\n
"
"
for (auto i = static_cast<int>(color); i < 10; i++) {
\n
"
"
a += i;
\n
"
"
}
\n
"
"
return a;
\n
"
"
}
"
);
ASSERT_EQUALS
(
"
"
,
errout_str
());
}
};
REGISTER_TEST
(TestPostfixOperator)
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