While it is convenient and helpful to use knitr functions where possible to avoid new parsing errors, the use of unexported functions is not a good idea, as these could be changed in a future release.
knitr:::parse_params() is currently used to find whether a code block contains one of the flags that indicates a block should be replaced, but this could presumably be done by a more direct search for the flag options, without fully parsing the parameter list, and without relying on un exported external package code.
While it is convenient and helpful to use
knitrfunctions where possible to avoid new parsing errors, the use of unexported functions is not a good idea, as these could be changed in a future release.knitr:::parse_params()is currently used to find whether a code block contains one of the flags that indicates a block should be replaced, but this could presumably be done by a more direct search for the flag options, without fully parsing the parameter list, and without relying on un exported external package code.