tmp/tmp4k2rtglg/{from.md → to.md}
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| 1 |
+
### Class `filesystem_error` <a id="fs.class.filesystem.error">[[fs.class.filesystem.error]]</a>
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``` cpp
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namespace std::filesystem {
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class filesystem_error : public system_error {
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public:
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filesystem_error(const string& what_arg, error_code ec);
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filesystem_error(const string& what_arg,
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const path& p1, error_code ec);
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filesystem_error(const string& what_arg,
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const path& p1, const path& p2, error_code ec);
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const path& path1() const noexcept;
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const path& path2() const noexcept;
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const char* what() const noexcept override;
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};
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}
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```
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The class `filesystem_error` defines the type of objects thrown as
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exceptions to report file system errors from functions described in
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subclause [[filesystems]].
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#### Members <a id="fs.filesystem.error.members">[[fs.filesystem.error.members]]</a>
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Constructors are provided that store zero, one, or two paths associated
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with an error.
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``` cpp
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filesystem_error(const string& what_arg, error_code ec);
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```
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*Ensures:*
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- `code() == ec`,
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- `path1().empty() == true`,
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- `path2().empty() == true`, and
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- `string_view(what()).find(what_arg.c_str())` `!= string_view::npos`.
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``` cpp
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filesystem_error(const string& what_arg, const path& p1, error_code ec);
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```
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*Ensures:*
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- `code() == ec`,
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- `path1()` returns a reference to the stored copy of `p1`,
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- `path2().empty() == true`, and
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- `string_view(what()).find(what_arg.c_str())` `!= string_view::npos`.
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``` cpp
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filesystem_error(const string& what_arg, const path& p1, const path& p2, error_code ec);
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```
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*Ensures:*
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- `code() == ec`,
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| 58 |
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- `path1()` returns a reference to the stored copy of `p1`,
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| 59 |
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- `path2()` returns a reference to the stored copy of `p2`, and
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- `string_view(what()).find(what_arg.c_str())` `!= string_view::npos`.
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``` cpp
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const path& path1() const noexcept;
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```
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*Returns:* A reference to the copy of `p1` stored by the constructor,
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or, if none, an empty path.
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``` cpp
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const path& path2() const noexcept;
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```
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*Returns:* A reference to the copy of `p2` stored by the constructor,
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or, if none, an empty path.
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``` cpp
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const char* what() const noexcept override;
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```
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*Returns:* An NTBS that incorporates the `what_arg` argument supplied to
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the constructor. The exact format is unspecified. Implementations should
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include the `system_error::what()` string and the pathnames of `path1`
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and `path2` in the native format in the returned string.
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