30 Input/output library [input.output]

30.10 File systems [filesystems]

30.10.34 Filesystem operation functions [fs.op.funcs]

30.10.34.6 Create directories [fs.op.create_directories]

bool create_directories(const path& p); bool create_directories(const path& p, error_code& ec) noexcept;

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Effects: Establishes the postcondition by calling create_­directory() for any element of p that does not exist.

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Postconditions: is_­directory(p).

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Returns: true if a new directory was created, otherwise false. The signature with argument ec returns false if an error occurs.

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Throws: As specified in [fs.err.report].

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Complexity: O(n) where n is the number of elements of p that do not exist.