31 Input/output library [input.output]

31.12 File systems [filesystems]

31.12.8 Enumerations [fs.enum]

31.12.8.2 Enum class file_type [fs.enum.file.type]

This enum class specifies constants used to identify file types, with the meanings listed in Table 144 .

The values of the constants are distinct.

Table 144 — Enum class file_type [tab:fs.enum.file.type]

🔗 Constant	Meaning
🔗 none	The type of the file has not been determined or an error occurred while trying to determine the type.
🔗 not_found	Pseudo-type indicating the file was not found. [Note 1: The file not being found is not considered an error while determining the type of a file. — end note]
🔗 regular	Regular file
🔗 directory	Directory file
🔗 symlink	Symbolic link file
🔗 block	Block special file
🔗 character	Character special file
🔗 fifo	FIFO or pipe file
🔗 socket	Socket file
🔗 implementation-defined	Implementations that support file systems having file types in addition to the above file_type types shall supply implementation-defined file_type constants to separately identify each of those additional file types
🔗 unknown	The file exists but the type cannot be determined