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separate_arguments
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------------------
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Parse space-separated arguments into a semicolon-separated list.
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::
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separate_arguments(<var> <NATIVE|UNIX|WINDOWS>_COMMAND "<args>")
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Parses a UNIX- or Windows-style command-line string "<args>" and
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stores a semicolon-separated list of the arguments in ``<var>``. The
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entire command line must be given in one "<args>" argument.
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The ``UNIX_COMMAND`` mode separates arguments by unquoted whitespace. It
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recognizes both single-quote and double-quote pairs. A backslash
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escapes the next literal character (``\"`` is ``"``); there are no special
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escapes (``\n`` is just ``n``).
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The ``WINDOWS_COMMAND`` mode parses a Windows command-line using the same
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syntax the runtime library uses to construct argv at startup. It
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separates arguments by whitespace that is not double-quoted.
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Backslashes are literal unless they precede double-quotes. See the
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MSDN article `Parsing C Command-Line Arguments`_ for details.
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The ``NATIVE_COMMAND`` mode parses a Windows command-line if the host
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system is Windows, and a UNIX command-line otherwise.
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.. _`Parsing C Command-Line Arguments`: https://msdn.microsoft.com/library/a1y7w461.aspx
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::
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separate_arguments(<var>)
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Convert the value of ``<var>`` to a semi-colon separated list. All
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spaces are replaced with ';'. This helps with generating command
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lines.
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