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// file : tests/small-vector/driver.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <string>
#include <cassert>
#include <iostream>
#include <butl/small-vector>
using namespace std;
using namespace butl;
// Return 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, 1>;
{
vector v;
assert (v.capacity () == 1 && small (v));
v.push_back ("abc");
assert (v[0] == "abc" && v.capacity () == 1 && 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", "xyz"});
assert (v1.get_allocator () != v2.get_allocator ()); // heap/stack
v2.assign ({"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 () == 1 && small (s2));
vector l1 ({"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, 1>;
vector s1; s1.emplace_back ("abc");
vector s2 (move (s1));
assert (s2[0] == "abc" && s2.capacity () == 1 && small (s2));
vector l1; l1.emplace_back ("abc"); l1.emplace_back ("xyz");
vector l2 (move (l1));
assert (l2[0] == "abc" && l2[1] == "xyz" && !small (l2));
}
// Other constructors.
//
{
const char* sa[] = {"abc"};
const char* la[] = {"abc", "xyz"};
vector s (sa, sa + 1);
assert (s[0] == "abc" && s.capacity () == 1 && small (s));
vector l (la, la + 2);
assert (l[0] == "abc" && l[1] == "xyz" && !small (l));
}
{
vector s (1, "abc");
assert (s[0] == "abc" && s.capacity () == 1 && small (s));
vector l (2, "abc");
assert (l[0] == "abc" && l[1] == "abc" && !small (l));
}
{
vector s (1);
assert (s[0] == "" && s.capacity () == 1 && small (s));
vector l (2);
assert (l[0] == "" && l[1] == "" && !small (l));
}
}
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