How are attributes parsed in Boost.PropertyTree?

Question

Say I have this XML format:

<Widget type="SomeWidget" name="foo">
   <Event name="onmouseover">
      dostuff();
   </Event>
</Widget>

How do I read the attributes using Boost.PropertyTree?

Full code example here: http://stackoverflow.com/a/14010792/438039 — kagali-san, Feb 11 '14 at 19:25

score 61 · Answer 1 · edited Nov 04 '13 at 15:16

61

If xml has such content:

<mode fullscreen="true">mode xxx</mode>

Use boost::property code:

get<string>("mode.<xmlattr>.fullscreen")

Oh yeah, it's ugly!

edited Nov 04 '13 at 15:16

Rob Percival

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answered Oct 10 '11 at 07:58

Kevin Zhao

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`mod xxx` does not appear to be well-formed xml. – ThomasMcLeod Feb 15 '13 at 17:05

score 12 · Accepted Answer · edited Feb 10 '20 at 10:03

12

If your problem is to get attributes:

The attributes of an XML element are stored in the subkey . There is one child node per attribute in the attribute node. Existence of the node is not guaranteed or necessary when there are no attributes.

From the doc http://www.boost.org/doc/libs/1_44_0/doc/html/boost_propertytree/parsers.html#boost_propertytree.parsers.xml_parser

So just get them from the <xmlattr> key in the path.

edited Feb 10 '20 at 10:03

Nerpson

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answered Sep 11 '10 at 13:55

Klaim

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Thank you very much. How do I access it exactly? I would really like to see an examle. – the_drow Sep 12 '10 at 08:21
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Will `BOOST_FOREACH(ptree::value_type &v, pt.get_child("widget.xmlattr")) attributes.insert(std::make_pair(v.first.data(), v.second.data())` do? – the_drow Sep 12 '10 at 11:31
I would love to see a sample that doesn't use BOOST_FOREACH. How about just pure C++ 98? If not, C++ 11 would be okay too, but not ideal. Part of learning a library is seeing the datatypes in use and auto hides the details of learning. – Mitch Sep 27 '16 at 20:36

How are attributes parsed in Boost.PropertyTree?

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