C++ (Cpp) __CPROVER_char_at示例

示例#1

文件： test.c 项目： DanielNeville/cbmc

int main()
{
    __CPROVER_string s;
    char c1, c2;
    int i;
    int j;
    i = 2;
    s = __CPROVER_string_literal("pippo");
    c1 = __CPROVER_char_at(s, i);
    c2 = 'p';
    assert (c1 == c2);
    assert (c1 != c2);
    return 0;
}

示例#2

文件： test.c 项目： diffblue/cbmc

int main()
{
    __CPROVER_string s, s2, s3;
    int i;

    s = __CPROVER_string_concat(s2, s3);
    __CPROVER_assume(__CPROVER_string_length(s2) == i);
    __CPROVER_assume(
        __CPROVER_string_equal(s3, __CPROVER_string_literal("pippo")));

    assert(__CPROVER_string_length(s) == i + 5);
    assert(__CPROVER_string_issuffix(__CPROVER_string_literal("po"),s));
    assert(__CPROVER_char_at(s, i) == __CPROVER_char_literal("p"));
    assert(__CPROVER_string_issuffix(__CPROVER_string_literal("p!o"), s));

    return 0;
}

示例#3

文件： test.c 项目： diffblue/cbmc

int main()
{
    __CPROVER_string s, s2, s3;
    int i;

    s = __CPROVER_string_concat(s2, s3);
    __CPROVER_assume(i < 10);
    __CPROVER_assume(__CPROVER_string_length(s2) == i);
    __CPROVER_assume(
        __CPROVER_string_equal(s3, __CPROVER_string_literal("pippo")));

    // proving the assertions individually seems to be much faster
    //assert(__CPROVER_string_length(s) == i + 5);
    //assert(__CPROVER_string_issuffix(__CPROVER_string_literal("po"), s));
    assert(__CPROVER_char_at(s, i) == __CPROVER_char_literal("p"));

    return 0;
}