I have a few simple questions about the usage of PROTECT, more specifically how careful one needs to be. Simple yes/no answers are fine.
Most of the uses I have seen do protection when memory is allocated. But what if one just want to assign a value of another function to a variable. Say eg. that foo is a function that returns a SEXP. Would the following code be fine? SEXP bar; PROTECT(bar = foo()); Also, basically in one use case I would want to return the value of foo immediately, but I need to do some cleaning up first, which has nothing to do with R (more specifically, I need to close various files). Would I then need to protect foo, as in SEXP bar; bar = foo(); "close the file in C++" return bar; Finally, I am also assigning values to the components of a list. Would the following be ok SEXP bar; PROTECT(bar = NEW_LIST(2)); SET_VECTOR_ELT(bar, 0, ScalarInteger(test()); (where test is a function returning int, which again has nothing to do with R - it interfaces to an extern library), or do I need to hedge myself against garbage collection in the SET_VECTOR_ELT macro? /Kasper ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
