[Nix-dev] nix-instantiate --parse-only --xml

[junger at stackframe.com]

Hi Everyone,

I'm working on a research project that involves converting Nix attrs
into XML and vice versa.  Using nix-instantiate with --xml works great
except that boolean types like:

	ttyBackgrounds = {
		enable = true;
	};

get translated into XML as:
	 <attr name="ttyBackgrounds">
	     <unevaluated />
	 </attr>
	 
regardless of the actual value.  Is this the normal behavior or a bug?
Poking around a bit in expr-to-xml.cc it looks like:
    else if (e == eTrue)
         doc.writeEmptyElement("bool", singletonAttrs("value", "true"));
    else if (e == eFalse)
        doc.writeEmptyElement("bool", singletonAttrs("value", "false"));

should handle this case but it is falling through.  Am I missing
something obvious here?

respectfully,

James Unger