Install rapidjson-dev by entering the following commands in the terminal:
sudo apt update sudo apt install rapidjson-dev
fast JSON parser/generator for C++ with SAX/DOM style API
RapidJSON is an attempt to create the fastest JSON parser and generator. . - Small but complete. Supports both SAX and DOM style API. SAX parser only a few hundred lines of code. - Fast. In the order of magnitude of strlen(). Optionally supports SSE2/SSE4.2 for acceleration. - Self-contained. Minimal dependency on standard libraries. No BOOST, not even STL. - Compact. Each JSON value is 16 or 20 bytes for 32 or 64-bit machines respectively (excluding text string storage). With the custom memory allocator, parser allocates memory compactly during parsing. - Full RFC7159 compliance. Supports UTF-8, UTF-16 and UTF-32. - Support both in-situ parsing (directly decode strings into the source JSON text) and non-destructive parsing (decode strings into new buffers). - Parse number to int/unsigned/int64_t/uint64_t/double depending on input - Support custom memory allocation. Also, the default memory pool allocator can also be supplied with a user buffer (such as a buffer allocated on user's heap or programme stack) to minimize allocation.