Sanitizing string for grepl

Question

Please consider the following

vector <- c("C++", "Abba", "Beatles", "C++")
string <- vector[1]

grepl(string,vector)

# Error in grepl(string, vector) : 
#  invalid regular expression 'C++', reason 'Invalid use of repetition operators'

I need a function to sanitize my vector before passing it to regex.

I tried to write adapt a regex function from JavaScript but without success.

regexSanitized <- function(string) {
  return(gsub("/[#-}]/g", "\\$&", string))
}

Answer 1

I figured I'd throw this down as an answer:

Use: grepl(string, vector, fixed = TRUE) or possibly vector %in% string and forgo regex all together.