{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"`pure`"}]}
`pure` are implemented identically by many C and C++ compilers, e.g., clang,
`cfg` macros in the Rust side to match those definitions. While the semantics of
[GCC], [ARM C/C++ compiler], [IBM ILE C/C++], etc. they are not necessarily