1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
// SPDX-FileCopyrightText: 2006-2025 Knut Reinert & Freie Universität Berlin
// SPDX-FileCopyrightText: 2016-2025 Knut Reinert & MPI für molekulare Genetik
// SPDX-License-Identifier: BSD-3-Clause
#include <gtest/gtest.h>
#include <algorithm>
#include <concepts>
#include <deque>
#include <ranges>
#include <string>
#include <vector>
#include <seqan3/test/expect_range_eq.hpp>
#include <seqan3/test/expect_same_type.hpp>
#include <seqan3/utility/range/concept.hpp>
#include <seqan3/utility/views/single_pass_input.hpp>
#include <seqan3/utility/views/slice.hpp>
// ============================================================================
// view_slice
// ============================================================================
TEST(view_slice, regular)
{
using namespace std::literals;
std::string const vec{"foobar"};
// pipe notation
EXPECT_RANGE_EQ("oob"sv, vec | seqan3::views::slice(1, 4));
// function notation
EXPECT_RANGE_EQ("oob"sv, seqan3::views::slice(vec, 1, 4));
// combinability
EXPECT_RANGE_EQ("o"sv, vec | seqan3::views::slice(0, 4) | seqan3::views::slice(1, 3) | std::views::take(1));
EXPECT_RANGE_EQ("abo"sv, vec | std::views::reverse | seqan3::views::slice(1, 4) | std::views::take(3));
// store arg
auto a0 = seqan3::views::slice(1, 4);
EXPECT_RANGE_EQ("oob"sv, vec | a0);
// store combined
auto a1 = seqan3::views::slice(0, 4) | seqan3::views::slice(1, 3) | std::views::take(1);
EXPECT_RANGE_EQ("o"sv, vec | a1);
// store combined in middle
auto a2 = std::views::reverse | seqan3::views::slice(1, 4) | std::views::take(3);
EXPECT_RANGE_EQ("abo"sv, vec | a2);
}
TEST(view_slice, concepts)
{
std::vector vec{1, 2, 3};
EXPECT_TRUE(std::ranges::input_range<decltype(vec)>);
EXPECT_TRUE(std::ranges::forward_range<decltype(vec)>);
EXPECT_TRUE(std::ranges::bidirectional_range<decltype(vec)>);
EXPECT_TRUE(std::ranges::random_access_range<decltype(vec)>);
EXPECT_FALSE(std::ranges::view<decltype(vec)>);
EXPECT_TRUE(std::ranges::sized_range<decltype(vec)>);
EXPECT_TRUE(std::ranges::common_range<decltype(vec)>);
EXPECT_TRUE(seqan3::const_iterable_range<decltype(vec)>);
EXPECT_TRUE((std::ranges::output_range<decltype(vec), int>));
auto v1 = vec | seqan3::views::slice(1, 4);
EXPECT_TRUE(std::ranges::input_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::forward_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::bidirectional_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::random_access_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::view<decltype(v1)>);
EXPECT_TRUE(std::ranges::sized_range<decltype(v1)>);
EXPECT_TRUE(std::ranges::common_range<decltype(v1)>);
EXPECT_TRUE(seqan3::const_iterable_range<decltype(v1)>);
EXPECT_TRUE((std::ranges::output_range<decltype(v1), int>));
auto v2 = vec | seqan3::views::single_pass_input | seqan3::views::slice(1, 4);
EXPECT_TRUE(std::ranges::input_range<decltype(v2)>);
EXPECT_FALSE(std::ranges::forward_range<decltype(v2)>);
EXPECT_FALSE(std::ranges::bidirectional_range<decltype(v2)>);
EXPECT_FALSE(std::ranges::random_access_range<decltype(v2)>);
EXPECT_TRUE(std::ranges::view<decltype(v2)>);
EXPECT_EQ(std::ranges::sized_range<decltype(v2)>, false);
EXPECT_FALSE(std::ranges::common_range<decltype(v2)>);
EXPECT_FALSE(seqan3::const_iterable_range<decltype(v2)>);
EXPECT_FALSE((std::ranges::output_range<decltype(v2), int>)); // single_pass_input loses it
}
TEST(view_slice, underlying_is_shorter)
{
using namespace std::literals;
std::string vec{"foobar"};
EXPECT_NO_THROW((seqan3::views::slice(vec, 1, 4))); // no parsing
// full parsing on conversion
EXPECT_RANGE_EQ("oob"sv, vec | seqan3::views::single_pass_input | seqan3::views::slice(1, 4));
}
TEST(view_slice, end_before_begin)
{
std::string vec{"foobar"};
EXPECT_THROW(seqan3::views::slice(vec, 4, 1), std::invalid_argument);
}
TEST(view_slice, type_erasure)
{
{ // string overload
std::string const urange{"foobar"};
auto v = seqan3::views::slice(urange, 1, 4);
EXPECT_SAME_TYPE(decltype(v), std::string_view);
EXPECT_RANGE_EQ(v, urange.substr(1, 3));
}
{ // stringview overload
std::string_view urange{"foobar"};
auto v = seqan3::views::slice(urange, 1, 4);
EXPECT_SAME_TYPE(decltype(v), std::string_view);
EXPECT_RANGE_EQ(v, urange.substr(1, 3));
}
{ // contiguous overload
std::vector<int> urange{1, 2, 3, 4, 5, 6};
auto v = seqan3::views::slice(urange, 1, 4);
EXPECT_SAME_TYPE(decltype(v), (std::span<int, std::dynamic_extent>));
EXPECT_RANGE_EQ(v, (std::vector{2, 3, 4}));
}
{ // contiguous overload
std::array<int, 6> urange{1, 2, 3, 4, 5, 6};
auto v = seqan3::views::slice(urange, 1, 4);
EXPECT_SAME_TYPE(decltype(v), (std::span<int, std::dynamic_extent>));
EXPECT_RANGE_EQ(v, (std::vector{2, 3, 4}));
}
{ // random-access overload
std::deque<int> urange{1, 2, 3, 4, 5, 6};
auto v = seqan3::views::slice(urange, 1, 4);
EXPECT_TRUE((std::same_as<
decltype(v),
std::ranges::subrange<typename std::deque<int>::iterator, typename std::deque<int>::iterator>>));
EXPECT_RANGE_EQ(v, (std::vector{2, 3, 4}));
}
}
|
