//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03
// <experimental/filesystem>
// class path
// path& operator+=(const path& x);
// path& operator+=(const string_type& x);
// path& operator+=(string_view x);
// path& operator+=(const value_type* x);
// path& operator+=(value_type x);
// template <class Source>
// path& operator+=(const Source& x);
// template <class EcharT>
// path& operator+=(EcharT x);
// template <class Source>
// path& concat(const Source& x);
// template <class InputIterator>
// path& concat(InputIterator first, InputIterator last);
#include <experimental/filesystem>
#include <type_traits>
#include <string>
#include <string_view>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
#include "count_new.hpp"
#include "filesystem_test_helper.hpp"
namespace fs = std::experimental::filesystem;
struct ConcatOperatorTestcase {
MultiStringType lhs;
MultiStringType rhs;
MultiStringType expect;
};
#define LONGSTR "LONGSTR_LONGSTR_LONGSTR_LONGSTR_LONGSTR_LONGSTR_LONGSTR_LONGSTR_LONGSTR_LONGSTR_LONGSTR_LONGSTR"
#define S(Str) MKSTR(Str)
const ConcatOperatorTestcase Cases[] =
{
{S(""), S(""), S("")}
, {S("p1"), S("p2"), S("p1p2")}
, {S("p1/"), S("/p2"), S("p1//p2")}
, {S(""), S("\\foo/bar/baz"), S("\\foo/bar/baz")}
, {S("c:\\foo"), S(""), S("c:\\foo")}
, {S(LONGSTR), S("foo"), S(LONGSTR "foo")}
, {S("abcdefghijklmnopqrstuvwxyz/\\"), S("/\\123456789"), S("abcdefghijklmnopqrstuvwxyz/\\/\\123456789")}
};
const ConcatOperatorTestcase LongLHSCases[] =
{
{S(""), S(LONGSTR), S(LONGSTR)}
, {S("p1/"), S(LONGSTR), S("p1/" LONGSTR)}
};
const ConcatOperatorTestcase CharTestCases[] =
{
{S(""), S("P"), S("P")}
, {S("/fooba"), S("r"), S("/foobar")}
};
#undef S
#undef LONGSTR
// The concat operator may need to allocate a temporary buffer before a code_cvt
// conversion. Test if this allocation occurs by:
// 1. Create a path, `LHS`, and reserve enough space to append `RHS`.
// This prevents `LHS` from allocating during the actual appending.
// 2. Create a `Source` object `RHS`, which represents a "large" string.
// (The string must not trigger the SSO)
// 3. Concat `RHS` to `LHS` and check for the expected allocation behavior.
template <class CharT>
void doConcatSourceAllocTest(ConcatOperatorTestcase const& TC)
{
using namespace fs;
using Ptr = CharT const*;
using Str = std::basic_string<CharT>;
using StrView = std::basic_string_view<CharT>;
using InputIter = input_iterator<Ptr>;
const Ptr L = TC.lhs;
const Ptr R = TC.rhs;
const Ptr E = TC.expect;
std::size_t ReserveSize = StrLen(E) + 1;
// basic_string
{
path LHS(L); PathReserve(LHS, ReserveSize);
Str RHS(R);
{
DisableAllocationGuard g;
LHS += RHS;
}
assert(LHS == E);
}
// basic_string_view
{
path LHS(L); PathReserve(LHS, ReserveSize);
StrView RHS(R);
{
DisableAllocationGuard g;
LHS += RHS;
}
assert(LHS == E);
}
// CharT*
{
path LHS(L); PathReserve(LHS, ReserveSize);
Ptr RHS(R);
{
DisableAllocationGuard g;
LHS += RHS;
}
assert(LHS == E);
}
{
path LHS(L); PathReserve(LHS, ReserveSize);
Ptr RHS(R);
{
DisableAllocationGuard g;
LHS.concat(RHS, StrEnd(RHS));
}
assert(LHS == E);
}
// input iterator - For non-native char types, appends needs to copy the
// iterator range into a contiguous block of memory before it can perform the
// code_cvt conversions.
// For "char" no allocations will be performed because no conversion is
// required.
bool DisableAllocations = std::is_same<CharT, char>::value;
{
path LHS(L); PathReserve(LHS, ReserveSize);
InputIter RHS(R);
{
RequireAllocationGuard g; // requires 1 or more allocations occur by default
if (DisableAllocations) g.requireExactly(0);
LHS += RHS;
}
assert(LHS == E);
}
{
path LHS(L); PathReserve(LHS, ReserveSize);
InputIter RHS(R);
InputIter REnd(StrEnd(R));
{
RequireAllocationGuard g;
if (DisableAllocations) g.requireExactly(0);
LHS.concat(RHS, REnd);
}
assert(LHS == E);
}
}
template <class CharT>
void doConcatSourceTest(ConcatOperatorTestcase const& TC)
{
using namespace fs;
using Ptr = CharT const*;
using Str = std::basic_string<CharT>;
using StrView = std::basic_string_view<CharT>;
using InputIter = input_iterator<Ptr>;
const Ptr L = TC.lhs;
const Ptr R = TC.rhs;
const Ptr E = TC.expect;
// basic_string
{
path LHS(L);
Str RHS(R);
path& Ref = (LHS += RHS);
assert(LHS == E);
assert(&Ref == &LHS);
}
{
path LHS(L);
Str RHS(R);
path& Ref = LHS.concat(RHS);
assert(LHS == E);
assert(&Ref == &LHS);
}
// basic_string_view
{
path LHS(L);
StrView RHS(R);
path& Ref = (LHS += RHS);
assert(LHS == E);
assert(&Ref == &LHS);
}
{
path LHS(L);
StrView RHS(R);
path& Ref = LHS.concat(RHS);
assert(LHS == E);
assert(&Ref == &LHS);
}
// Char*
{
path LHS(L);
Str RHS(R);
path& Ref = (LHS += RHS);
assert(LHS == E);
assert(&Ref == &LHS);
}
{
path LHS(L);
Ptr RHS(R);
path& Ref = LHS.concat(RHS);
assert(LHS == E);
assert(&Ref == &LHS);
}
{
path LHS(L);
Ptr RHS(R);
path& Ref = LHS.concat(RHS, StrEnd(RHS));
assert(LHS == E);
assert(&Ref == &LHS);
}
// iterators
{
path LHS(L);
InputIter RHS(R);
path& Ref = (LHS += RHS);
assert(LHS == E);
assert(&Ref == &LHS);
}
{
path LHS(L); InputIter RHS(R);
path& Ref = LHS.concat(RHS);
assert(LHS == E);
assert(&Ref == &LHS);
}
{
path LHS(L);
InputIter RHS(R);
InputIter REnd(StrEnd(R));
path& Ref = LHS.concat(RHS, REnd);
assert(LHS == E);
assert(&Ref == &LHS);
}
}
template <class CharT>
void doConcatECharTest(ConcatOperatorTestcase const& TC)
{
using namespace fs;
using Ptr = CharT const*;
const Ptr RStr = TC.rhs;
assert(StrLen(RStr) == 1);
const Ptr L = TC.lhs;
const CharT R = RStr[0];
const Ptr E = TC.expect;
{
path LHS(L);
path& Ref = (LHS += R);
assert(LHS == E);
assert(&Ref == &LHS);
}
}
template <class It, class = decltype(fs::path{}.concat(std::declval<It>()))>
constexpr bool has_concat(int) { return true; }
template <class It>
constexpr bool has_concat(long) { return false; }
template <class It, class = decltype(fs::path{}.operator+=(std::declval<It>()))>
constexpr bool has_concat_op(int) { return true; }
template <class It>
constexpr bool has_concat_op(long) { return false; }
template <class It>
constexpr bool has_concat_op() { return has_concat_op<It>(0); }
template <class It>
constexpr bool has_concat() {
static_assert(has_concat<It>(0) == has_concat_op<It>(0), "must be same");
return has_concat<It>(0) && has_concat_op<It>(0);
}
void test_sfinae() {
using namespace fs;
{
static_assert(has_concat_op<char>(), "");
static_assert(has_concat_op<const char>(), "");
static_assert(has_concat_op<char16_t>(), "");
static_assert(has_concat_op<const char16_t>(), "");
}
{
using It = const char* const;
static_assert(has_concat<It>(), "");
}
{
using It = input_iterator<const char*>;
static_assert(has_concat<It>(), "");
}
{
struct Traits {
using iterator_category = std::input_iterator_tag;
using value_type = const char;
using pointer = const char*;
using reference = const char&;
using difference_type = std::ptrdiff_t;
};
using It = input_iterator<const char*, Traits>;
static_assert(has_concat<It>(), "");
}
{
using It = output_iterator<const char*>;
static_assert(!has_concat<It>(), "");
}
{
static_assert(!has_concat<int>(0), "");
// operator+=(int) is well formed since it converts to operator+=(value_type)
// but concat(int) isn't valid because there is no concat(value_type).
// This should probably be addressed by a LWG issue.
static_assert(has_concat_op<int>(), "");
}
{
static_assert(!has_concat<int*>(), "");
}
}
int main()
{
using namespace fs;
for (auto const & TC : Cases) {
{
path LHS((const char*)TC.lhs);
path RHS((const char*)TC.rhs);
path& Ref = (LHS += RHS);
assert(LHS == (const char*)TC.expect);
assert(&Ref == &LHS);
}
{
path LHS((const char*)TC.lhs);
std::string_view RHS((const char*)TC.rhs);
path& Ref = (LHS += RHS);
assert(LHS == (const char*)TC.expect);
assert(&Ref == &LHS);
}
doConcatSourceTest<char> (TC);
doConcatSourceTest<wchar_t> (TC);
doConcatSourceTest<char16_t>(TC);
doConcatSourceTest<char32_t>(TC);
}
for (auto const & TC : LongLHSCases) {
// Do path test
{
path LHS((const char*)TC.lhs);
path RHS((const char*)TC.rhs);
const char* E = TC.expect;
PathReserve(LHS, StrLen(E) + 5);
{
DisableAllocationGuard g;
path& Ref = (LHS += RHS);
assert(&Ref == &LHS);
}
assert(LHS == E);
}
{
path LHS((const char*)TC.lhs);
std::string_view RHS((const char*)TC.rhs);
const char* E = TC.expect;
PathReserve(LHS, StrLen(E) + 5);
{
DisableAllocationGuard g;
path& Ref = (LHS += RHS);
assert(&Ref == &LHS);
}
assert(LHS == E);
}
doConcatSourceAllocTest<char>(TC);
doConcatSourceAllocTest<wchar_t>(TC);
}
for (auto const& TC : CharTestCases) {
doConcatECharTest<char>(TC);
doConcatECharTest<wchar_t>(TC);
doConcatECharTest<char16_t>(TC);
doConcatECharTest<char32_t>(TC);
}
test_sfinae();
}