This is a simple wrapper around eval(parse()) which provides a more
consistent interface than the default functions.
If data is NULL then the code is evaluated in the environment. If data
is not NULL than the code is evaluated in the data object first, with
the enclosing environment of envir.
evaluate(code, envir)R code to evaluate
environment to evaluate the code in
This function is designed to be used within transformers to evaluate the code in the glue block.