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// Copyright (C) 2008-2018 Lorenzo Caminiti
// Distributed under the Boost Software License, Version 1.0 (see accompanying
// file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
// See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
// Test public function overloads.
#include "../detail/oteststream.hpp"
#include <boost/contract/public_function.hpp>
#include <boost/contract/base_types.hpp>
#include <boost/contract/override.hpp>
#include <boost/contract/check.hpp>
#include <boost/detail/lightweight_test.hpp>
#include <sstream>
#include <string>
boost::contract::test::detail::oteststream out;
struct b {
static void static_invariant() { out << "b::static_inv" << std::endl; }
void invariant() const { out << "b::inv" << std::endl; }
virtual void f(int /* x */, boost::contract::virtual_* v = 0) {
boost::contract::check c = boost::contract::public_function(v, this)
.precondition([] { out << "b::f(int)::pre" << std::endl; })
.old([] { out << "b::f(int)::old" << std::endl; })
.postcondition([] { out << "b::f(int)::post" << std::endl; })
;
out << "b::f(int)::body" << std::endl;
}
virtual void f(char const* /* x */, boost::contract::virtual_* v = 0) {
boost::contract::check c = boost::contract::public_function(v, this)
.precondition([] { out << "b::f(char const*)::pre" << std::endl; })
.old([] { out << "b::f(char const*)::old" << std::endl; })
.postcondition(
[] { out << "b::f(char const*)::post" << std::endl; })
;
out << "b::f(char const*)::body" << std::endl;
}
virtual void f(int /* x */, int /* y */, boost::contract::virtual_* v = 0) {
boost::contract::check c = boost::contract::public_function(v, this)
.precondition([] { out << "b::f(int, int)::pre" << std::endl; })
.old([] { out << "b::f(int, int)::old" << std::endl; })
.postcondition([] { out << "b::f(int, int)::post" << std::endl; })
;
out << "b::f(int, int)::body" << std::endl;
}
virtual void f(boost::contract::virtual_* v = 0) {
boost::contract::check c = boost::contract::public_function(v, this)
.precondition([] { out << "b::f()::pre" << std::endl; })
.old([] { out << "b::f()::old" << std::endl; })
.postcondition([] { out << "b::f()::post" << std::endl; })
;
out << "b::f()::body" << std::endl;
}
void f(int /* x */[2][3], boost::contract::virtual_* v = 0) {
boost::contract::check c = boost::contract::public_function(v, this)
.precondition([] { out << "b::f(int[2][3])::pre" << std::endl; })
.old([] { out << "b::f(int[2][3])::old" << std::endl; })
.postcondition([] { out << "b::f(int[2][3])::post" << std::endl; })
;
out << "b::f(int[2][3])::body" << std::endl;
}
void f(void (* /* x */)(int), boost::contract::virtual_* v = 0) {
boost::contract::check c = boost::contract::public_function(v, this)
.precondition(
[] { out << "b::f(void (*)(int))::pre" << std::endl; })
.old(
[] { out << "b::f(void (*)(int))::old" << std::endl; })
.postcondition(
[] { out << "b::f(void (*)(int))::post" << std::endl; })
;
out << "b::f(void (*)(int))::body" << std::endl;
}
};
struct a
#define BASES public b
: BASES
{
typedef BOOST_CONTRACT_BASE_TYPES(BASES) base_types;
#undef BASES
static void static_invariant() { out << "a::static_inv" << std::endl; }
void invariant() const { out << "a::inv" << std::endl; }
void f(int x, boost::contract::virtual_* v = 0) /* override */ {
boost::contract::check c = boost::contract::public_function<override_f>(
v,
static_cast<void (a::*)(int, boost::contract::virtual_*)>(&a::f),
this, x
)
.precondition([] { out << "a::f(int)::pre" << std::endl; })
.old([] { out << "a::f(int)::old" << std::endl; })
.postcondition([] { out << "a::f(int)::post" << std::endl; })
;
out << "a::f(int)::body" << std::endl;
}
// Test overload via argument type.
void f(char const* x, boost::contract::virtual_* v = 0) /* override */ {
boost::contract::check c = boost::contract::public_function<override_f>(
v,
static_cast<void (a::*)(char const*, boost::contract::virtual_*)>(
&a::f),
this, x
)
.precondition([] { out << "a::f(char const*)::pre" << std::endl; })
.old([] { out << "a::f(char const*)::old" << std::endl; })
.postcondition(
[] { out << "a::f(char const*)::post" << std::endl; })
;
out << "a::f(char const*)::body" << std::endl;
}
// Test overload via argument count.
void f(int x, int y, boost::contract::virtual_* v = 0) /* override */ {
boost::contract::check c = boost::contract::public_function<override_f>(
v,
static_cast<void (a::*)(int, int, boost::contract::virtual_*)>(
&a::f),
this, x, y
)
.precondition([] { out << "a::f(int, int)::pre" << std::endl; })
.old([] { out << "a::f(int, int)::old" << std::endl; })
.postcondition([] { out << "a::f(int, int)::post" << std::endl; })
;
out << "a::f(int, int)::body" << std::endl;
}
// Test overload via template argument type.
template<typename T>
void f(T /* x */) { // Template cannot be virtual (or override) in C++.
boost::contract::check c = boost::contract::public_function(this)
.precondition([] { out << "a::f(T)::pre" << std::endl; })
.old([] { out << "a::f(T)::old" << std::endl; })
.postcondition([] { out << "a::f(T)::post" << std::endl; })
;
out << "a::f(T)::body" << std::endl;
}
// Test no overload ambiguity in public_function called by these two cases.
// NOTE: In *all* other cases, public_function is always called with a
// different number of arguments so there cannot be ambiguity either
// (0 args for static, 1 arg for non-virtual, 2 or 3 args for virtual,
// >= 3 for override, so only in cases below of 3 args for virtual and 3
// for override there could be ambiguity but there is not because of
// presence or absence of override_... template parameter).
typedef void (a::* f0_ptr)(boost::contract::virtual_*);
void f(boost::contract::virtual_* v = 0) /* override */ {
f0_ptr f0 = static_cast<f0_ptr>(&a::f);
// Test this and public_function call in func below both take same 3
// args but they are ambiguous because of presence override_f.
boost::contract::check c = boost::contract::public_function<override_f>(
v, f0, this)
.precondition([] { out << "a::f()::pre" << std::endl; })
.old([] { out << "a::f()::old" << std::endl; })
.postcondition([] { out << "a::f()::post" << std::endl; })
;
out << "a::f()::body" << std::endl;
}
virtual f0_ptr f(bool /* x */, boost::contract::virtual_* v = 0)
/* not an override */ {
f0_ptr f0 = static_cast<f0_ptr>(&a::f);
// Test this and public_function call in func above both take same 3
// args but they are ambiguous because of lack of override_f.
boost::contract::check c = boost::contract::public_function(
v, f0, this)
.precondition([] { out << "a::f(bool)::pre" << std::endl; })
.old([] { out << "a::f(bool)::old" << std::endl; })
.postcondition([] (f0_ptr const&) {
out << "a::f(bool)::post" << std::endl; })
;
out << "a::f(bool)::body" << std::endl;
return f0;
}
// Test overload with array parameter.
void f(int x[2][3], boost::contract::virtual_* v = 0) /* override */ {
boost::contract::check c = boost::contract::public_function<override_f>(
v,
static_cast<void (a::*)(int[2][3], boost::contract::virtual_*)>(
&a::f),
this, x
)
.precondition([] { out << "a::f(int[2][3])::pre" << std::endl; })
.old([] { out << "a::f(int[2][3])::old" << std::endl; })
.postcondition([] { out << "a::f(int[2][3])::post" << std::endl; })
;
out << "a::f(int[2][3])::body" << std::endl;
}
// Test overload with function pointer parameter.
void f(void (*x)(int), boost::contract::virtual_* v = 0) /* override */ {
boost::contract::check c = boost::contract::public_function<override_f>(
v,
static_cast<void (a::*)(void (*)(int), boost::contract::virtual_*)>(
&a::f),
this, x
)
.precondition(
[] { out << "a::f(void (*)(int))::pre" << std::endl; })
.old(
[] { out << "a::f(void (*)(int))::old" << std::endl; })
.postcondition(
[] { out << "a::f(void (*)(int))::post" << std::endl; })
;
out << "a::f(void (*)(int))::body" << std::endl;
}
BOOST_CONTRACT_OVERRIDE(f)
};
void g(int) {}
std::string ok_args(std::string const& args) {
std::ostringstream ok; ok
#ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
<< "b::static_inv" << std::endl
<< "b::inv" << std::endl
<< "a::static_inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
<< "b::f(" << args << ")::pre" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_OLDS
<< "b::f(" << args << ")::old" << std::endl
<< "a::f(" << args << ")::old" << std::endl
#endif
<< "a::f(" << args << ")::body" << std::endl
#ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
<< "b::static_inv" << std::endl
<< "b::inv" << std::endl
<< "a::static_inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
<< "b::f(" << args << ")::old" << std::endl
<< "b::f(" << args << ")::post" << std::endl
<< "a::f(" << args << ")::post" << std::endl
#endif
;
return ok.str();
}
int main() {
std::ostringstream ok;
a aa;
out.str("");
aa.f(123);
ok.str(""); ok << ok_args("int");
BOOST_TEST(out.eq(ok.str()));
out.str("");
aa.f("abc");
ok.str(""); ok << ok_args("char const*");
BOOST_TEST(out.eq(ok.str()));
out.str("");
aa.f(123, 456);
ok.str(""); ok << ok_args("int, int");
BOOST_TEST(out.eq(ok.str()));
out.str("");
struct {} zz;
aa.f(zz); // Call template (so no override because no virtual).
ok.str(""); ok
#ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
<< "a::static_inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
<< "a::f(T)::pre" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_OLDS
<< "a::f(T)::old" << std::endl
#endif
<< "a::f(T)::body" << std::endl
#ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
<< "a::static_inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
<< "a::f(T)::post" << std::endl
#endif
;
BOOST_TEST(out.eq(ok.str()));
out.str("");
aa.f();
ok.str(""); ok << ok_args("");
BOOST_TEST(out.eq(ok.str()));
out.str("");
aa.f(true); // This does not override (public_function ambiguity testing).
ok.str(""); ok
#ifndef BOOST_CONTRACT_NO_ENTRY_INVARIANTS
<< "a::static_inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_PRECONDITIONS
<< "a::f(bool)::pre" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_OLDS
<< "a::f(bool)::old" << std::endl
#endif
<< "a::f(bool)::body" << std::endl
#ifndef BOOST_CONTRACT_NO_EXIT_INVARIANTS
<< "a::static_inv" << std::endl
<< "a::inv" << std::endl
#endif
#ifndef BOOST_CONTRACT_NO_POSTCONDITIONS
<< "a::f(bool)::post" << std::endl
#endif
;
BOOST_TEST(out.eq(ok.str()));
out.str("");
int i[2][3];
aa.f(i);
ok.str(""); ok << ok_args("int[2][3]");
BOOST_TEST(out.eq(ok.str()));
out.str("");
aa.f(&g);
ok.str(""); ok << ok_args("void (*)(int)");
BOOST_TEST(out.eq(ok.str()));
return boost::report_errors();
}
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