id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
9496	property_tree write_json should output correct types in JSON	Egbert van der Wal <ewal@…>	Sebastian Redl	"When using boost::property_tree::write_json it will write all types as strings, which is unwanted when wanting to preserve the correct types for data.

- The boolean value is stored as the string ""true"" or ""false"",
- Null is stored as the string ""null""
- Numeric values are also stored as strings
- Floating point values might end up in their scientific, lossy representations

For my purposes, I need to transfer numeric values (unix timestamps represented as double) in their most accurate representation using JSON and boolean values to represent correct boolean values without writing another text-to-bool converter.

I will attach a patch that fixes this. For every value in the property_tree, it will
* try to match is with boolean true or false, and write that value unquoted to the JSON output
* try to read it as an integer and if that succeeds, write it unquoted to the JSON output
* try to read it as a double value and if that succeeds, write it unquoted with appropriate numeric precision (based on std::numeric_limits) to the JSON output
* try to see if the string matches 'null' and if it does, it will write null unquoted to the JSON output
* if all else fails, write the value as a quoted string to the JSON output

This will make it a lot easier to interpret the JSON on the receiving and, and greatly improve accuracy for double values."	Patches	closed	To Be Determined	property_tree	Boost Development Trunk	Optimization	invalid