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Copy pathtestrefthunk.cpp
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134 lines (118 loc) · 3.46 KB
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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2026 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 "fixture.h"
#include "refthunk.h"
#include <cstddef>
#include <string>
class TestRefThunk : public TestFixture {
public:
TestRefThunk() : TestFixture("TestRefThunk") {}
private:
void run() override {
TEST_CASE(callAccess);
TEST_CASE(getReference);
TEST_CASE(referenceConversion);
TEST_CASE(memberAccess);
TEST_CASE(mutation);
TEST_CASE(copyConstruct);
TEST_CASE(copyAssign);
TEST_CASE(rebind);
TEST_CASE(convertToConst);
TEST_CASE(functionArguments);
}
void callAccess() const {
int x = 42;
const RefThunk<int> p(x);
ASSERT_EQUALS(42, p());
ASSERT(&p() == &x);
}
void getReference() const {
int x = 1;
const RefThunk<int> p(x);
ASSERT(&p.get() == &x);
p.get() = 2;
ASSERT_EQUALS(2, x);
}
void referenceConversion() const {
int x = 1;
const RefThunk<int> p(x);
int& ref = p;
ASSERT(&ref == &x);
ref = 2;
ASSERT_EQUALS(2, x);
}
void memberAccess() const {
const std::string s = "abc";
const RefThunk<const std::string> p(s);
ASSERT_EQUALS(3, p().size());
ASSERT_EQUALS("abc", p());
}
void mutation() const {
std::string s = "abc";
const RefThunk<std::string> p(s);
p() += "d";
p().push_back('e');
ASSERT_EQUALS("abcde", s);
}
void copyConstruct() const {
int x = 1;
const RefThunk<int> p(x);
const RefThunk<int> q(p);
ASSERT(&q() == &x);
}
void copyAssign() const {
int x = 1;
int y = 2;
RefThunk<int> p(x);
const RefThunk<int> q(y);
ASSERT(&p() == &x);
p = q;
ASSERT(&p() == &y);
ASSERT_EQUALS(2, p());
}
void rebind() const {
int x = 1;
int y = 2;
RefThunk<int> p(x);
ASSERT(&p() == &x);
// assignment rebinds, like std::reference_wrapper - it does not write through
p = y;
ASSERT(&p() == &y);
ASSERT_EQUALS(1, x);
}
void convertToConst() const {
int x = 1;
const RefThunk<int> p(x);
const RefThunk<const int> cp(p);
ASSERT(&cp() == &x);
const int& ref = cp;
ASSERT(&ref == &x);
}
static std::size_t refArg(const std::string& s) {
return s.size();
}
void functionArguments() const {
std::string s = "abcd";
const RefThunk<std::string> p(s);
// implicit conversion to reference, like std::reference_wrapper
ASSERT_EQUALS(4, refArg(p));
// explicit access through operator()
ASSERT_EQUALS(4, refArg(p()));
}
};
REGISTER_TEST(TestRefThunk)