forked from OSchip/llvm-project
52 lines
1.5 KiB
C++
52 lines
1.5 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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// <string>
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// iterator insert(const_iterator p, charT c);
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#include <string>
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#include <stdexcept>
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#include <cassert>
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template <class S>
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void
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test(S& s, typename S::const_iterator p, typename S::value_type c, S expected)
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{
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bool sufficient_cap = s.size() < s.capacity();
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typename S::difference_type pos = p - s.begin();
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typename S::iterator i = s.insert(p, c);
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assert(s.__invariants());
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assert(s == expected);
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assert(i - s.begin() == pos);
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assert(*i == c);
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if (sufficient_cap)
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assert(i == p);
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}
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int main()
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{
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typedef std::string S;
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S s;
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test(s, s.begin(), '1', S("1"));
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test(s, s.begin(), 'a', S("a1"));
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test(s, s.end(), 'b', S("a1b"));
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test(s, s.end()-1, 'c', S("a1cb"));
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test(s, s.end()-2, 'd', S("a1dcb"));
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test(s, s.end()-3, '2', S("a12dcb"));
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test(s, s.end()-4, '3', S("a132dcb"));
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test(s, s.end()-5, '4', S("a1432dcb"));
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test(s, s.begin()+1, '5', S("a51432dcb"));
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test(s, s.begin()+2, '6', S("a561432dcb"));
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test(s, s.begin()+3, '7', S("a5671432dcb"));
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test(s, s.begin()+4, 'A', S("a567A1432dcb"));
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test(s, s.begin()+5, 'B', S("a567AB1432dcb"));
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test(s, s.begin()+6, 'C', S("a567ABC1432dcb"));
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}
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