forked from OSchip/llvm-project
70 lines
1.6 KiB
C++
70 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <deque>
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// void push_front(const value_type& v);
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#include <deque>
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#include <cassert>
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std::deque<int>
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make(int size, int start = 0 )
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{
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const int b = 4096 / sizeof(int);
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int init = 0;
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if (start > 0)
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{
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init = (start+1) / b + ((start+1) % b != 0);
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init *= b;
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--init;
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}
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std::deque<int> c(init, 0);
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for (int i = 0; i < init-start; ++i)
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c.pop_back();
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for (int i = 0; i < size; ++i)
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c.push_back(i);
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for (int i = 0; i < start; ++i)
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c.pop_front();
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return c;
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};
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void
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test(std::deque<int>& c1, int x)
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{
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typedef std::deque<int> C;
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typedef C::iterator I;
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std::size_t c1_osize = c1.size();
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c1.push_front(x);
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assert(c1.size() == c1_osize + 1);
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assert(distance(c1.begin(), c1.end()) == c1.size());
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I i = c1.begin();
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assert(*i == x);
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++i;
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for (int j = 0; j < c1_osize; ++j, ++i)
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assert(*i == j);
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}
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void
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testN(int start, int N)
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{
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typedef std::deque<int> C;
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C c1 = make(N, start);
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test(c1, -10);
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}
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int main()
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{
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int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
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const int N = sizeof(rng)/sizeof(rng[0]);
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for (int i = 0; i < N; ++i)
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for (int j = 0; j < N; ++j)
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testN(rng[i], rng[j]);
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}
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