generalise last space in regex for exposing funcs

Author: sbfnk

rstan/rstan/R/expose_stan_functions.R

@@ -30,7 +30,7 @@ expose_stan_functions_hacks <- function(code, includes = NULL) {
                 code, sep = "\n")
   code <- gsub("// [[stan::function]]",
                "// [[Rcpp::export]]", code, fixed = TRUE)
-  code <- gsub("stan::math::accumulator<double>& lp_accum__,(\\n)?(\\s*)?std::ostream\\*(\\n)?(\\s*)?pstream__(\\n)?(\\s*)?=(\\n)?\\s*)?(nullptr|0))(\\s*)?\\{",
+  code <- gsub("stan::math::accumulator<double>&(\\s*)?lp_accum__,(\\n)?(\\s*)?std::ostream\\*(\\n)?(\\s*)?pstream__(\\n)?(\\s*)?=(\\n)?\\s*)?(nullptr|0))(\\s*)?\\{",
                "std::ostream* pstream__ = nullptr){\nstan::math::accumulator<double> lp_accum__;",
                code)
   code <- gsub("pstream__(\\s*|)=(\\s*|)nullptr", "pstream__ = 0", code)