Allow to add metadata to json nodes#3028
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barcode wants to merge 2 commits intonlohmann:developfrom
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* by default no metadata is allowed and the library behaves as it already did * if a user explicitly adds metadata (last template parameter) each node has a data member of this type and access functions for this member * add test for this feature
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Closed in favour of #3110 which implements the more powerful feature of a custom base class and thus allows adding custom member functions as well. |
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When processing json it is often useful to annotate nodes with some metadata. This PR adds an additional template parameter which allows to set the type of metadata.
By default the parameter is set to void and no metadata is allowed. In this case the library behaves as it already did.
If a user explicitly adds metadata (last template parameter) each node has a data member of this type and access functions for this member.
This metadata can be used to tag nodes or store information such as the line and column number from an input file.
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include/nlohmanndirectory, runmake amalgamateto create the single-header filesingle_include/nlohmann/json.hpp. The whole process is described here.