30 Input/output library [input.output]

30.10 File systems [filesystems]

30.10.15 Filesystem operation functions [fs.op.funcs]

30.10.15.16 Is block file [fs.op.is_block_file]

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bool is_block_file(file_status s) noexcept;
1
#
Returns: s.type() == file_­type​::​block.
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bool is_block_file(const path& p); bool is_block_file(const path& p, error_code& ec) noexcept;
2
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Returns: is_­block_­file(status(p)) or is_­block_­file(status(p, ec)), respectively.
The signature with argument ec returns false if an error occurs.
3
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Throws: As specified in [fs.err.report].