kandi X-RAY | property_tree Summary
kandi X-RAY | property_tree Summary
Boost.org property_tree module
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property_tree Key Features
property_tree Examples and Code Snippets
Trending Discussions on property_tree
Following this link provided by @sehe in this post Boost_option to parse a configuration file, I need to parse configuration files that may have comments.
But since there are comments (leading #), so in addition to read_info(), should a grammer_spirit be used to take out the comments as well? I am referring to info_grammar_spirit.cpp in the /property_tree/examples folder...
ANSWERAnswered 2021-May-28 at 01:45
You would do good to avoid depending on implementation details, so instead I'd suggest pre-processing your config file just to strip the comments.
A simple replace of
"; " may be enough.
Building on the previous answer:
I would like to set the DOCTYPE of the generated XML document by
ANSWERAnswered 2021-May-11 at 13:34
You can't. Boost Property Tree, unsurprisingly, is not an XML library. It's a property tree library.
To write XML, consider using an XML library: What XML parser should I use in C++?
Then again, there is potentially a hack using undocumented interface: removing encoding attribute from xml using boost
That way you effectively bypass the document writing code and you can substitute it with your own
I have an ini file like this;...
ANSWERAnswered 2021-May-08 at 13:06
You need to "escape" the dot. Dots are special, so your key is interpreted as [Sensor][Offsets][x], not [Sensor.Offsets][x].
You can force it:
I am using different functions and when executing each function, I would like to create Json message for communication like as shown below:...
ANSWERAnswered 2021-Mar-29 at 15:32
Please, do not use Property Tree as a JSON library.
Boost 1.75.0 added a JSON library though!
As the other commenter said, it's not very clear what exactly you require, so let me just sketch a few similar use-cases:
I am learning from http://www.cochoy.fr/boost-property-tree/. Instead of write_json to stdout, I tried to save it in a string....
ANSWERAnswered 2021-Mar-05 at 12:52
Incase you're interested in where the newline comes from you can take a look at the write_json_internal source code, we can see that there is an
stream << std::endl; near the end of the method. Note that ...::write_json references write_json_internal.
I have file which is converted from byte array to string...
ANSWERAnswered 2021-Feb-19 at 19:16
Don't use Property Tree as if it's a JSON library. It has well known limitations: https://www.boost.org/doc/libs/1_75_0/doc/html/property_tree/parsers.html#property_tree.parsers.json_parser
Note especially the limitationssurrounding arrays.
Next up, you didn't write an array to begin with, instead writing a string. But since it's binary data, it may be a valid JSON string, and this could be a source of error.
Also, you probably don't need to copy the whole JSON again to put it in a buffer. Instead,
boost::asio::buffer(resultString) will work (as long as you make sure that the lifetime of
resultString is enough, like with
Just testing a little does suggest that characters are being escaped correctly by
I'm reading an XML file into a
boost::property_tree and trying to get the complete key path for every value.
- Does boost have a built in way to do this
- Were is the error in my recursion?
example input - my_file.xml...
ANSWERAnswered 2021-Feb-12 at 14:32
Every iteration of your for loop adds to the
parentKey value so it will have all the children's names in it by the end of the loop. Use a separate variable to hold the key name for each node:
I have my Config class, that manages app config, get set etc. I want other classes to be able to use it, but passing it to each method as a reference is a pain, And I have a feeling there is better way to do it.
so this is my config class header:...
ANSWERAnswered 2020-Dec-20 at 13:18
Depends on the actual usage context, but if you are familiar with the singleton pattern, this might be a way to go here in doubt if you are not able to forward the configuration information by design in a quite non-intrusive way (the latter should almost always be the preferred way but I know there are sometimes exceptional situations in reality). The context of the singleton needn't to be totally global in doubt since you can use a global singleton to ensure more "context-sensitive" branching if required.
But as mentioned: Try to solve this by design if the context of this configuration isn't that global in doubt. Provide a possibly quite central handler class (as sharedPtr for instance) that offers the configuration data on request. Then, solely the used objects' constructors require that one as a parameter.
I am using the Boost Property Tree for a Project and came across a problem. I'm using it like this:...
ANSWERAnswered 2020-Sep-24 at 10:20
No you cannot change this behavior, as the string value type is pretty muched baked into
boost::property_tree. While you could technically use different template type parameters than the default ones, you loose much of the conversion logic that went into that library.
As a somewhat wanky alternative, consider the following.
I have a function with the following signature:...
ANSWERAnswered 2020-Nov-29 at 15:44
The Standard library has no platform independent way to detect if a locale is UTF-8. There's only a name method which returns a platform dependent name. Even if it is a POSIX name there's no guarantee that the encoding is part of the locale's name.
Boost.Locale offers an additional facet called
boost::locale::info holding detailed information about the current locale.
You can obtain the info like this:
No vulnerabilities reported
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