mirror of
https://github.com/qpdf/qpdf.git
synced 2024-11-08 22:31:09 +00:00
419 lines
8.5 KiB
C++
419 lines
8.5 KiB
C++
#include <qpdf/assert_test.h>
|
|
|
|
#include <cstdlib>
|
|
#include <cstring>
|
|
#include <functional>
|
|
#include <iostream>
|
|
#include <map>
|
|
#include <memory>
|
|
#include <regex>
|
|
#include <type_traits>
|
|
#include <vector>
|
|
|
|
// Functional programming
|
|
|
|
// Function that returns a callable in the form of a lambda
|
|
std::function<int(int)>
|
|
make_adder(int x)
|
|
{
|
|
return ([=](int a) -> int { return x + a; });
|
|
}
|
|
|
|
void
|
|
do_functional()
|
|
{
|
|
// Lambda with no capture
|
|
auto simple_lambda = [](int a) { return a + 3; };
|
|
assert(simple_lambda(5) == 8);
|
|
|
|
// Capture by value
|
|
int x = 5;
|
|
auto by_value = [x](int a) { return a + x; };
|
|
assert(by_value(1) == 6);
|
|
x = 7; // change not seen by lambda
|
|
assert(by_value(1) == 6);
|
|
// Also >> at end of template
|
|
assert((std::is_convertible<decltype(by_value), std::function<int(int)>>::value));
|
|
|
|
// Capture by reference
|
|
auto by_reference = [&x](int a) { return a + x; };
|
|
assert(by_reference(1) == 8);
|
|
x = 8; // change seen my lambda
|
|
assert(by_reference(1) == 9);
|
|
|
|
// Get a callable from a function
|
|
auto add3 = make_adder(3);
|
|
assert(add3(5) == 8);
|
|
|
|
auto make_addr_lambda = [](int a) { return [a](int b) { return a + b; }; };
|
|
|
|
assert(make_addr_lambda(6)(8) == 14);
|
|
|
|
// nullptr and {} are empty functions
|
|
std::function<void()> f1 = {};
|
|
assert(!f1);
|
|
std::function<void()> f2 = nullptr;
|
|
assert(!f2);
|
|
}
|
|
|
|
// Integer types, type traits
|
|
|
|
template <typename T>
|
|
void
|
|
check_size(size_t size, bool is_signed)
|
|
{
|
|
assert(sizeof(T) == size);
|
|
assert(std::is_signed<T>::value == is_signed);
|
|
}
|
|
|
|
void
|
|
do_inttypes()
|
|
{
|
|
// static_assert is a compile-time check
|
|
static_assert(1 == sizeof(int8_t), "int8_t check");
|
|
check_size<int8_t>(1, true);
|
|
check_size<uint8_t>(1, false);
|
|
check_size<int16_t>(2, true);
|
|
check_size<uint16_t>(2, false);
|
|
check_size<int32_t>(4, true);
|
|
check_size<uint32_t>(4, false);
|
|
check_size<int64_t>(8, true);
|
|
check_size<uint64_t>(8, false);
|
|
|
|
// auto, decltype
|
|
auto x = 5LL;
|
|
check_size<decltype(x)>(8, true);
|
|
assert((std::is_same<long long, decltype(x)>::value));
|
|
}
|
|
|
|
class A
|
|
{
|
|
public:
|
|
static constexpr auto def_value = 5;
|
|
A(int x) :
|
|
x(x)
|
|
{
|
|
}
|
|
// Constructor delegation
|
|
A() :
|
|
A(def_value)
|
|
{
|
|
}
|
|
int
|
|
getX() const
|
|
{
|
|
return x;
|
|
}
|
|
|
|
private:
|
|
int x;
|
|
};
|
|
|
|
void
|
|
do_iteration()
|
|
{
|
|
// Initializers, foreach syntax, auto for iterators
|
|
std::vector<int> v = {1, 2, 3, 4};
|
|
assert(v.size() == 4);
|
|
int sum = 0;
|
|
for (auto& i: v) {
|
|
sum += i;
|
|
}
|
|
assert(10 == sum);
|
|
for (auto i = v.begin(); i != v.end(); ++i) {
|
|
sum += *i;
|
|
}
|
|
assert(20 == sum);
|
|
|
|
std::vector<A> v2 = {A(), A(3)};
|
|
assert(5 == v2.at(0).getX());
|
|
assert(3 == v2.at(1).getX());
|
|
}
|
|
|
|
// Variadic template
|
|
|
|
template <class A1>
|
|
void
|
|
variadic1(A1 const& a1)
|
|
{
|
|
assert(a1 == 12);
|
|
}
|
|
|
|
template <class A1, class A2>
|
|
void
|
|
variadic1(A1 const& a1, A2 const& a2)
|
|
{
|
|
assert(a1 == a2);
|
|
}
|
|
|
|
template <class... Args>
|
|
void
|
|
variadic(Args... args)
|
|
{
|
|
variadic1(args...);
|
|
}
|
|
|
|
template <class A>
|
|
bool
|
|
pairwise_equal(A const& a, A const& b)
|
|
{
|
|
return (a == b);
|
|
}
|
|
|
|
template <class T, class... Rest>
|
|
bool
|
|
pairwise_equal(T const& a, T const& b, Rest... rest)
|
|
{
|
|
return pairwise_equal(a, b) && pairwise_equal(rest...);
|
|
}
|
|
|
|
void
|
|
do_variadic()
|
|
{
|
|
variadic(15, 15);
|
|
variadic(12);
|
|
assert(pairwise_equal(5, 5, 2.0, 2.0, std::string("a"), std::string("a")));
|
|
assert(!pairwise_equal(5, 5, 2.0, 3.0));
|
|
}
|
|
|
|
// deleted, default
|
|
|
|
class B
|
|
{
|
|
public:
|
|
B(int x) :
|
|
x(x)
|
|
{
|
|
}
|
|
B() :
|
|
B(5)
|
|
{
|
|
}
|
|
int
|
|
getX() const
|
|
{
|
|
return x;
|
|
}
|
|
|
|
virtual ~B() = default;
|
|
B(B const&) = delete;
|
|
B& operator=(B const&) = delete;
|
|
|
|
private:
|
|
int x;
|
|
};
|
|
|
|
void
|
|
do_default_deleted()
|
|
{
|
|
B b1;
|
|
assert(5 == b1.getX());
|
|
assert(std::is_copy_constructible<A>::value);
|
|
assert(!std::is_copy_constructible<B>::value);
|
|
}
|
|
|
|
// smart pointers
|
|
|
|
class C
|
|
{
|
|
public:
|
|
C(int id = 0) :
|
|
id(id)
|
|
{
|
|
incr(id);
|
|
}
|
|
~C()
|
|
{
|
|
decr(id);
|
|
}
|
|
C(C const& rhs) :
|
|
C(rhs.id)
|
|
{
|
|
}
|
|
C&
|
|
operator=(C const& rhs)
|
|
{
|
|
if (&rhs != this) {
|
|
decr(id);
|
|
id = rhs.id;
|
|
incr(id);
|
|
}
|
|
return *this;
|
|
}
|
|
static void
|
|
check(size_t size, int v, int count)
|
|
{
|
|
assert(m.size() == size);
|
|
auto p = m.find(v);
|
|
if (p != m.end()) {
|
|
assert(p->second == count);
|
|
}
|
|
}
|
|
|
|
private:
|
|
void
|
|
incr(int i)
|
|
{
|
|
++m[i];
|
|
}
|
|
void
|
|
decr(int i)
|
|
{
|
|
if (--m[i] == 0) {
|
|
m.erase(i);
|
|
}
|
|
}
|
|
|
|
static std::map<int, int> m;
|
|
int id;
|
|
};
|
|
|
|
std::map<int, int> C::m;
|
|
|
|
std::shared_ptr<C>
|
|
make_c(int id)
|
|
{
|
|
return std::make_shared<C>(id);
|
|
}
|
|
|
|
std::shared_ptr<C>
|
|
make_c_array(std::vector<int> const& is)
|
|
{
|
|
auto p = std::shared_ptr<C>(new C[is.size()], std::default_delete<C[]>());
|
|
C* pp = p.get();
|
|
for (size_t i = 0; i < is.size(); ++i) {
|
|
pp[i] = C(is.at(i));
|
|
}
|
|
return p;
|
|
}
|
|
|
|
void
|
|
do_smart_pointers()
|
|
{
|
|
auto p1 = make_c(1);
|
|
C::check(1, 1, 1);
|
|
auto p2 = make_c_array({2, 3, 4, 5});
|
|
for (auto i: {1, 2, 3, 4, 5}) {
|
|
C::check(5, i, 1);
|
|
}
|
|
{
|
|
C::check(5, 1, 1);
|
|
C c3(*p1);
|
|
C::check(5, 1, 2);
|
|
}
|
|
C::check(5, 1, 1);
|
|
p1 = nullptr;
|
|
C::check(4, 1, 0);
|
|
p2 = nullptr;
|
|
C::check(0, 0, 0);
|
|
{
|
|
std::unique_ptr<C> p3(new C(6));
|
|
C::check(1, 6, 1);
|
|
}
|
|
C::check(0, 0, 0);
|
|
}
|
|
|
|
// Regular expressions
|
|
|
|
void
|
|
do_regex()
|
|
{
|
|
// Basic match/search. Match matches whole string; search searches
|
|
// within string. Use std::smatch for matching std::string and
|
|
// std::cmatch for matching char const*.
|
|
|
|
std::regex expr1("([0-9]+)");
|
|
std::regex expr2("([0-9]+)\\s*([a-z]+)[[:space:]]*([0-9]+)");
|
|
std::string str1("one 234 fifth 678 nine");
|
|
std::string str2("234 five 678 nine");
|
|
std::string str3("one 234 five 678");
|
|
std::string str4("234");
|
|
std::string str5("234 five 678");
|
|
std::smatch match1;
|
|
assert(!std::regex_match(str1, match1, expr1));
|
|
assert(!std::regex_match(str2, match1, expr1));
|
|
assert(!std::regex_match(str3, match1, expr1));
|
|
assert(std::regex_match(str4, match1, expr1));
|
|
assert(match1[0].first == match1[1].first);
|
|
assert(match1[0].second == match1[1].second);
|
|
std::string s;
|
|
s.assign(match1[1].first, match1[1].second);
|
|
assert("234" == s);
|
|
assert(s == match1[1].str());
|
|
assert(std::regex_match(str5, match1, expr2));
|
|
assert("234 five 678" == match1[0].str());
|
|
assert("234" == match1[1].str());
|
|
assert("five" == match1[2].str());
|
|
assert("678" == match1[3].str());
|
|
assert(std::regex_search(str1, match1, expr2));
|
|
assert("234 fifth 678" == match1[0].str());
|
|
assert("234" == match1[1].str());
|
|
assert("fifth" == match1[2].str());
|
|
assert("678" == match1[3].str());
|
|
|
|
// Iterator
|
|
std::regex expr3("[[:digit:]]+");
|
|
std::string str6 = "asdf234erasdf9453.kgdl423asdf";
|
|
std::sregex_iterator m1(str6.begin(), str6.end(), expr3);
|
|
std::sregex_iterator m2;
|
|
s.clear();
|
|
for (std::sregex_iterator iter = m1; iter != m2; ++iter) {
|
|
std::smatch const& match2 = *iter;
|
|
s += match2[0].str() + "|";
|
|
}
|
|
assert("234|9453|423|" == s);
|
|
|
|
// Submatches
|
|
std::regex expr4("(?:(asdf)|(qwer))");
|
|
char const* str7 = "0asdf1qwer2";
|
|
std::cregex_iterator m3(str7, str7 + std::strlen(str7), expr4);
|
|
assert("asdf" == (*m3)[0].str());
|
|
assert((*m3)[1].matched);
|
|
assert(!(*m3)[2].matched);
|
|
++m3;
|
|
assert("qwer" == (*m3)[0].str());
|
|
assert(!(*m3)[1].matched);
|
|
assert((*m3)[2].matched);
|
|
}
|
|
|
|
static long
|
|
operator""_x(char const* v)
|
|
{
|
|
return strtol(v, nullptr, 16);
|
|
}
|
|
|
|
static std::string
|
|
operator""_y(char const* v, size_t len)
|
|
{
|
|
return "y" + std::string(v, len) + "y";
|
|
}
|
|
|
|
void
|
|
do_user_defined_literals()
|
|
{
|
|
assert(10_x == 16); // operator""_x("10")
|
|
assert("abc"_y == "yabcy"); // operator""_y("abc", 3)
|
|
// Raw literals. Optional matching label before and after ()
|
|
// allows embedding something that looks like the default end
|
|
// delimiter in the string.
|
|
assert(R"(abc)"_y == "yabcy");
|
|
|
|
// This construct does not work in MSVC as of version 2019.
|
|
// assert(R"x(a)"bc)x"_y == "ya)\"bcy");
|
|
}
|
|
|
|
int
|
|
main()
|
|
{
|
|
do_functional();
|
|
do_inttypes();
|
|
do_iteration();
|
|
do_variadic();
|
|
do_default_deleted();
|
|
do_smart_pointers();
|
|
do_regex();
|
|
do_user_defined_literals();
|
|
std::cout << "assertions passed\n";
|
|
return 0;
|
|
}
|