質問編集履歴
2
追記修正
title
CHANGED
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File without changes
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body
CHANGED
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@@ -89,9 +89,7 @@
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89
89
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90
90
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int main()
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91
91
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{
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92
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-
str str_exist;
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93
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-
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94
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-
for (auto e :
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92
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+
for (auto e : str().get_vec())
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95
93
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{
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96
94
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cout << e << endl;
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97
95
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}
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1
追記
title
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File without changes
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body
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@@ -62,4 +62,39 @@
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62
62
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}
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63
63
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```
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64
64
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65
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-
2つ目のrange-based forは危険でしょうか？
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65
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+
2つ目のrange-based forは危険でしょうか？
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66
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+
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67
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+
【追記】
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68
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+
```cpp
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69
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+
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70
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+
#include <iostream>
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71
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+
#include <fstream>
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72
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+
#include <string>
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73
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+
#include <vector>
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74
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+
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75
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+
using namespace std;
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76
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+
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77
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+
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78
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+
struct str
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79
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{
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80
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+
vector<int> _vec
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81
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+
{
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82
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+
0,
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83
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+
1,
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84
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+
2
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85
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+
};
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86
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+
public:
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87
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+
auto& get_vec() { return _vec; }
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88
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+
};
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89
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+
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90
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+
int main()
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|
91
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{
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92
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+
str str_exist;
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93
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+
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94
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+
for (auto e : str_exist.get_vec())
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95
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+
{
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96
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+
cout << e << endl;
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97
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+
}
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|
98
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+
}
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99
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+
```
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100
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+
上記なら危険なのですね。
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