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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // <string>
     11 
     12 // basic_string<charT,traits,Allocator>&
     13 //   erase(size_type pos = 0, size_type n = npos);
     14 
     15 #include <string>
     16 #include <stdexcept>
     17 #include <cassert>
     18 
     19 #include "min_allocator.h"
     20 
     21 template <class S>
     22 void
     23 test(S s, typename S::size_type pos, typename S::size_type n, S expected)
     24 {
     25     typename S::size_type old_size = s.size();
     26     S s0 = s;
     27     try
     28     {
     29         s.erase(pos, n);
     30         assert(s.__invariants());
     31         assert(pos <= old_size);
     32         assert(s == expected);
     33     }
     34     catch (std::out_of_range&)
     35     {
     36         assert(pos > old_size);
     37         assert(s == s0);
     38     }
     39 }
     40 
     41 template <class S>
     42 void
     43 test(S s, typename S::size_type pos, S expected)
     44 {
     45     typename S::size_type old_size = s.size();
     46     S s0 = s;
     47     try
     48     {
     49         s.erase(pos);
     50         assert(s.__invariants());
     51         assert(pos <= old_size);
     52         assert(s == expected);
     53     }
     54     catch (std::out_of_range&)
     55     {
     56         assert(pos > old_size);
     57         assert(s == s0);
     58     }
     59 }
     60 
     61 template <class S>
     62 void
     63 test(S s, S expected)
     64 {
     65     s.erase();
     66     assert(s.__invariants());
     67     assert(s == expected);
     68 }
     69 
     70 int main()
     71 {
     72     {
     73     typedef std::string S;
     74     test(S(""), 0, 0, S(""));
     75     test(S(""), 0, 1, S(""));
     76     test(S(""), 1, 0, S("can't happen"));
     77     test(S("abcde"), 0, 0, S("abcde"));
     78     test(S("abcde"), 0, 1, S("bcde"));
     79     test(S("abcde"), 0, 2, S("cde"));
     80     test(S("abcde"), 0, 4, S("e"));
     81     test(S("abcde"), 0, 5, S(""));
     82     test(S("abcde"), 0, 6, S(""));
     83     test(S("abcde"), 1, 0, S("abcde"));
     84     test(S("abcde"), 1, 1, S("acde"));
     85     test(S("abcde"), 1, 2, S("ade"));
     86     test(S("abcde"), 1, 3, S("ae"));
     87     test(S("abcde"), 1, 4, S("a"));
     88     test(S("abcde"), 1, 5, S("a"));
     89     test(S("abcde"), 2, 0, S("abcde"));
     90     test(S("abcde"), 2, 1, S("abde"));
     91     test(S("abcde"), 2, 2, S("abe"));
     92     test(S("abcde"), 2, 3, S("ab"));
     93     test(S("abcde"), 2, 4, S("ab"));
     94     test(S("abcde"), 4, 0, S("abcde"));
     95     test(S("abcde"), 4, 1, S("abcd"));
     96     test(S("abcde"), 4, 2, S("abcd"));
     97     test(S("abcde"), 5, 0, S("abcde"));
     98     test(S("abcde"), 5, 1, S("abcde"));
     99     test(S("abcde"), 6, 0, S("can't happen"));
    100     test(S("abcdefghij"), 0, 0, S("abcdefghij"));
    101     test(S("abcdefghij"), 0, 1, S("bcdefghij"));
    102     test(S("abcdefghij"), 0, 5, S("fghij"));
    103     test(S("abcdefghij"), 0, 9, S("j"));
    104     test(S("abcdefghij"), 0, 10, S(""));
    105     test(S("abcdefghij"), 0, 11, S(""));
    106     test(S("abcdefghij"), 1, 0, S("abcdefghij"));
    107     test(S("abcdefghij"), 1, 1, S("acdefghij"));
    108     test(S("abcdefghij"), 1, 4, S("afghij"));
    109     test(S("abcdefghij"), 1, 8, S("aj"));
    110     test(S("abcdefghij"), 1, 9, S("a"));
    111     test(S("abcdefghij"), 1, 10, S("a"));
    112     test(S("abcdefghij"), 5, 0, S("abcdefghij"));
    113     test(S("abcdefghij"), 5, 1, S("abcdeghij"));
    114     test(S("abcdefghij"), 5, 2, S("abcdehij"));
    115     test(S("abcdefghij"), 5, 4, S("abcdej"));
    116     test(S("abcdefghij"), 5, 5, S("abcde"));
    117     test(S("abcdefghij"), 5, 6, S("abcde"));
    118     test(S("abcdefghij"), 9, 0, S("abcdefghij"));
    119     test(S("abcdefghij"), 9, 1, S("abcdefghi"));
    120     test(S("abcdefghij"), 9, 2, S("abcdefghi"));
    121     test(S("abcdefghij"), 10, 0, S("abcdefghij"));
    122     test(S("abcdefghij"), 10, 1, S("abcdefghij"));
    123     test(S("abcdefghij"), 11, 0, S("can't happen"));
    124     test(S("abcdefghijklmnopqrst"), 0, 0, S("abcdefghijklmnopqrst"));
    125     test(S("abcdefghijklmnopqrst"), 0, 1, S("bcdefghijklmnopqrst"));
    126     test(S("abcdefghijklmnopqrst"), 0, 10, S("klmnopqrst"));
    127     test(S("abcdefghijklmnopqrst"), 0, 19, S("t"));
    128     test(S("abcdefghijklmnopqrst"), 0, 20, S(""));
    129     test(S("abcdefghijklmnopqrst"), 0, 21, S(""));
    130     test(S("abcdefghijklmnopqrst"), 1, 0, S("abcdefghijklmnopqrst"));
    131     test(S("abcdefghijklmnopqrst"), 1, 1, S("acdefghijklmnopqrst"));
    132     test(S("abcdefghijklmnopqrst"), 1, 9, S("aklmnopqrst"));
    133     test(S("abcdefghijklmnopqrst"), 1, 18, S("at"));
    134     test(S("abcdefghijklmnopqrst"), 1, 19, S("a"));
    135     test(S("abcdefghijklmnopqrst"), 1, 20, S("a"));
    136     test(S("abcdefghijklmnopqrst"), 10, 0, S("abcdefghijklmnopqrst"));
    137     test(S("abcdefghijklmnopqrst"), 10, 1, S("abcdefghijlmnopqrst"));
    138     test(S("abcdefghijklmnopqrst"), 10, 5, S("abcdefghijpqrst"));
    139     test(S("abcdefghijklmnopqrst"), 10, 9, S("abcdefghijt"));
    140     test(S("abcdefghijklmnopqrst"), 10, 10, S("abcdefghij"));
    141     test(S("abcdefghijklmnopqrst"), 10, 11, S("abcdefghij"));
    142     test(S("abcdefghijklmnopqrst"), 19, 0, S("abcdefghijklmnopqrst"));
    143     test(S("abcdefghijklmnopqrst"), 19, 1, S("abcdefghijklmnopqrs"));
    144     test(S("abcdefghijklmnopqrst"), 19, 2, S("abcdefghijklmnopqrs"));
    145     test(S("abcdefghijklmnopqrst"), 20, 0, S("abcdefghijklmnopqrst"));
    146     test(S("abcdefghijklmnopqrst"), 20, 1, S("abcdefghijklmnopqrst"));
    147     test(S("abcdefghijklmnopqrst"), 21, 0, S("can't happen"));
    148 
    149     test(S(""), 0, S(""));
    150     test(S(""), 1, S("can't happen"));
    151     test(S("abcde"), 0, S(""));
    152     test(S("abcde"), 1, S("a"));
    153     test(S("abcde"), 2, S("ab"));
    154     test(S("abcde"), 4, S("abcd"));
    155     test(S("abcde"), 5, S("abcde"));
    156     test(S("abcde"), 6, S("can't happen"));
    157     test(S("abcdefghij"), 0, S(""));
    158     test(S("abcdefghij"), 1, S("a"));
    159     test(S("abcdefghij"), 5, S("abcde"));
    160     test(S("abcdefghij"), 9, S("abcdefghi"));
    161     test(S("abcdefghij"), 10, S("abcdefghij"));
    162     test(S("abcdefghij"), 11, S("can't happen"));
    163     test(S("abcdefghijklmnopqrst"), 0, S(""));
    164     test(S("abcdefghijklmnopqrst"), 1, S("a"));
    165     test(S("abcdefghijklmnopqrst"), 10, S("abcdefghij"));
    166     test(S("abcdefghijklmnopqrst"), 19, S("abcdefghijklmnopqrs"));
    167     test(S("abcdefghijklmnopqrst"), 20, S("abcdefghijklmnopqrst"));
    168     test(S("abcdefghijklmnopqrst"), 21, S("can't happen"));
    169 
    170     test(S(""), S(""));
    171     test(S("abcde"), S(""));
    172     test(S("abcdefghij"), S(""));
    173     test(S("abcdefghijklmnopqrst"), S(""));
    174     }
    175 #if __cplusplus >= 201103L
    176     {
    177     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
    178     test(S(""), 0, 0, S(""));
    179     test(S(""), 0, 1, S(""));
    180     test(S(""), 1, 0, S("can't happen"));
    181     test(S("abcde"), 0, 0, S("abcde"));
    182     test(S("abcde"), 0, 1, S("bcde"));
    183     test(S("abcde"), 0, 2, S("cde"));
    184     test(S("abcde"), 0, 4, S("e"));
    185     test(S("abcde"), 0, 5, S(""));
    186     test(S("abcde"), 0, 6, S(""));
    187     test(S("abcde"), 1, 0, S("abcde"));
    188     test(S("abcde"), 1, 1, S("acde"));
    189     test(S("abcde"), 1, 2, S("ade"));
    190     test(S("abcde"), 1, 3, S("ae"));
    191     test(S("abcde"), 1, 4, S("a"));
    192     test(S("abcde"), 1, 5, S("a"));
    193     test(S("abcde"), 2, 0, S("abcde"));
    194     test(S("abcde"), 2, 1, S("abde"));
    195     test(S("abcde"), 2, 2, S("abe"));
    196     test(S("abcde"), 2, 3, S("ab"));
    197     test(S("abcde"), 2, 4, S("ab"));
    198     test(S("abcde"), 4, 0, S("abcde"));
    199     test(S("abcde"), 4, 1, S("abcd"));
    200     test(S("abcde"), 4, 2, S("abcd"));
    201     test(S("abcde"), 5, 0, S("abcde"));
    202     test(S("abcde"), 5, 1, S("abcde"));
    203     test(S("abcde"), 6, 0, S("can't happen"));
    204     test(S("abcdefghij"), 0, 0, S("abcdefghij"));
    205     test(S("abcdefghij"), 0, 1, S("bcdefghij"));
    206     test(S("abcdefghij"), 0, 5, S("fghij"));
    207     test(S("abcdefghij"), 0, 9, S("j"));
    208     test(S("abcdefghij"), 0, 10, S(""));
    209     test(S("abcdefghij"), 0, 11, S(""));
    210     test(S("abcdefghij"), 1, 0, S("abcdefghij"));
    211     test(S("abcdefghij"), 1, 1, S("acdefghij"));
    212     test(S("abcdefghij"), 1, 4, S("afghij"));
    213     test(S("abcdefghij"), 1, 8, S("aj"));
    214     test(S("abcdefghij"), 1, 9, S("a"));
    215     test(S("abcdefghij"), 1, 10, S("a"));
    216     test(S("abcdefghij"), 5, 0, S("abcdefghij"));
    217     test(S("abcdefghij"), 5, 1, S("abcdeghij"));
    218     test(S("abcdefghij"), 5, 2, S("abcdehij"));
    219     test(S("abcdefghij"), 5, 4, S("abcdej"));
    220     test(S("abcdefghij"), 5, 5, S("abcde"));
    221     test(S("abcdefghij"), 5, 6, S("abcde"));
    222     test(S("abcdefghij"), 9, 0, S("abcdefghij"));
    223     test(S("abcdefghij"), 9, 1, S("abcdefghi"));
    224     test(S("abcdefghij"), 9, 2, S("abcdefghi"));
    225     test(S("abcdefghij"), 10, 0, S("abcdefghij"));
    226     test(S("abcdefghij"), 10, 1, S("abcdefghij"));
    227     test(S("abcdefghij"), 11, 0, S("can't happen"));
    228     test(S("abcdefghijklmnopqrst"), 0, 0, S("abcdefghijklmnopqrst"));
    229     test(S("abcdefghijklmnopqrst"), 0, 1, S("bcdefghijklmnopqrst"));
    230     test(S("abcdefghijklmnopqrst"), 0, 10, S("klmnopqrst"));
    231     test(S("abcdefghijklmnopqrst"), 0, 19, S("t"));
    232     test(S("abcdefghijklmnopqrst"), 0, 20, S(""));
    233     test(S("abcdefghijklmnopqrst"), 0, 21, S(""));
    234     test(S("abcdefghijklmnopqrst"), 1, 0, S("abcdefghijklmnopqrst"));
    235     test(S("abcdefghijklmnopqrst"), 1, 1, S("acdefghijklmnopqrst"));
    236     test(S("abcdefghijklmnopqrst"), 1, 9, S("aklmnopqrst"));
    237     test(S("abcdefghijklmnopqrst"), 1, 18, S("at"));
    238     test(S("abcdefghijklmnopqrst"), 1, 19, S("a"));
    239     test(S("abcdefghijklmnopqrst"), 1, 20, S("a"));
    240     test(S("abcdefghijklmnopqrst"), 10, 0, S("abcdefghijklmnopqrst"));
    241     test(S("abcdefghijklmnopqrst"), 10, 1, S("abcdefghijlmnopqrst"));
    242     test(S("abcdefghijklmnopqrst"), 10, 5, S("abcdefghijpqrst"));
    243     test(S("abcdefghijklmnopqrst"), 10, 9, S("abcdefghijt"));
    244     test(S("abcdefghijklmnopqrst"), 10, 10, S("abcdefghij"));
    245     test(S("abcdefghijklmnopqrst"), 10, 11, S("abcdefghij"));
    246     test(S("abcdefghijklmnopqrst"), 19, 0, S("abcdefghijklmnopqrst"));
    247     test(S("abcdefghijklmnopqrst"), 19, 1, S("abcdefghijklmnopqrs"));
    248     test(S("abcdefghijklmnopqrst"), 19, 2, S("abcdefghijklmnopqrs"));
    249     test(S("abcdefghijklmnopqrst"), 20, 0, S("abcdefghijklmnopqrst"));
    250     test(S("abcdefghijklmnopqrst"), 20, 1, S("abcdefghijklmnopqrst"));
    251     test(S("abcdefghijklmnopqrst"), 21, 0, S("can't happen"));
    252 
    253     test(S(""), 0, S(""));
    254     test(S(""), 1, S("can't happen"));
    255     test(S("abcde"), 0, S(""));
    256     test(S("abcde"), 1, S("a"));
    257     test(S("abcde"), 2, S("ab"));
    258     test(S("abcde"), 4, S("abcd"));
    259     test(S("abcde"), 5, S("abcde"));
    260     test(S("abcde"), 6, S("can't happen"));
    261     test(S("abcdefghij"), 0, S(""));
    262     test(S("abcdefghij"), 1, S("a"));
    263     test(S("abcdefghij"), 5, S("abcde"));
    264     test(S("abcdefghij"), 9, S("abcdefghi"));
    265     test(S("abcdefghij"), 10, S("abcdefghij"));
    266     test(S("abcdefghij"), 11, S("can't happen"));
    267     test(S("abcdefghijklmnopqrst"), 0, S(""));
    268     test(S("abcdefghijklmnopqrst"), 1, S("a"));
    269     test(S("abcdefghijklmnopqrst"), 10, S("abcdefghij"));
    270     test(S("abcdefghijklmnopqrst"), 19, S("abcdefghijklmnopqrs"));
    271     test(S("abcdefghijklmnopqrst"), 20, S("abcdefghijklmnopqrst"));
    272     test(S("abcdefghijklmnopqrst"), 21, S("can't happen"));
    273 
    274     test(S(""), S(""));
    275     test(S("abcde"), S(""));
    276     test(S("abcdefghij"), S(""));
    277     test(S("abcdefghijklmnopqrst"), S(""));
    278     }
    279 #endif
    280 }
    281