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// file : tests/small-vector/driver.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#ifndef __cpp_lib_modules_ts
#include <string>
#include <iostream>
#endif
// Other includes.
#ifdef __cpp_modules_ts
#ifdef __cpp_lib_modules_ts
import std.core;
import std.io;
#endif
import butl.small_vector;
#else
#include <libbutl/small-vector.mxx>
#endif
#undef NDEBUG
#include <cassert>
using namespace std;
using namespace butl;
// Return true if v.data() points to somewhere inside v.
//
template <typename T, size_t N>
inline bool
small (const small_vector<T, N>& v)
{
const void* d (v.data ());
return d >= &v && d < (&v + 1);
}
int
main ()
{
using vector = small_vector<string, 2>;
{
vector v;
assert (v.capacity () == 2 && small (v));
v.push_back ("abc");
assert (v[0] == "abc" && v.capacity () == 2 && small (v));
v.push_back ("ABC");
assert (v[1] == "ABC" && v.capacity () == 2 && small (v));
string* d (v.data ()); // Small buffer...
v.push_back ("xyz");
assert (v[0] == "abc" && v.data () != d && !small (v));
v.pop_back ();
v.shrink_to_fit ();
assert (v[0] == "abc" && v.data () == d);
}
// Allocator comparison.
//
{
vector v1, v2;
assert (v1.get_allocator () != v2.get_allocator ()); // stack/stack
v1.assign ({"abc", "ABC", "xyz"});
assert (v1.get_allocator () != v2.get_allocator ()); // heap/stack
v2.assign ({"abc", "ABC", "xyz"});
assert (v1.get_allocator () == v2.get_allocator ()); // heap/heap
v1.pop_back ();
v1.shrink_to_fit ();
assert (v1.get_allocator () != v2.get_allocator ()); // stack/heap
v2.pop_back ();
v2.shrink_to_fit ();
assert (v1.get_allocator () != v2.get_allocator ()); // stack/stack
}
// Copy constructor.
//
{
vector s1 ({"abc"}), s2 (s1);
assert (s1 == s2 && s2.capacity () == 2 && small (s2));
vector l1 ({"abc", "ABC", "xyz"}), l2 (l1);
assert (l1 == l2 && !small (l2));
}
// Move constructor.
//
{
struct mstring: string // Move-only string.
{
mstring () = default;
explicit mstring (const char* s): string (s) {}
mstring (mstring&&) = default;
mstring& operator= (mstring&&) = default;
mstring (const mstring&) = delete;
mstring& operator= (const mstring&) = delete;
};
using vector = small_vector<mstring, 2>;
{
vector s1;
s1.emplace_back ("abc");
vector s2 (move (s1));
assert (s2[0] == "abc" && s2.capacity () == 2 && small (s2));
assert (s1.empty ()); // The source vector must be empty now.
}
{
vector s1;
s1.emplace_back ("abc");
s1.emplace_back ("ABC");
vector s2 (move (s1));
assert (s2[0] == "abc" && s2[1] == "ABC" &&
s2.capacity () == 2 && small (s2));
}
vector l1;
l1.emplace_back ("abc");
l1.emplace_back ("ABC");
l1.emplace_back ("xyz");
vector l2 (move (l1));
assert (l2[0] == "abc" && l2[1] == "ABC" && l2[2] == "xyz" && !small (l2));
}
// Other constructors.
//
{
const char* sa[] = {"abc"};
const char* la[] = {"abc", "ABC", "xyz"};
vector s (sa, sa + 1);
assert (s[0] == "abc" && s.capacity () == 2 && small (s));
vector l (la, la + 3);
assert (l[0] == "abc" && l[1] == "ABC" && l[2] == "xyz" && !small (l));
}
{
vector s (1, "abc");
assert (s[0] == "abc" && s.capacity () == 2 && small (s));
vector l (3, "abc");
assert (l[0] == "abc" && l[2] == "abc" && !small (l));
}
{
vector s (1);
assert (s[0] == "" && s.capacity () == 2 && small (s));
vector l (3);
assert (l[0] == "" && l[2] == "" && !small (l));
}
}
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