.charLiteralsIn: Collect character-string literals appearing in a parsed expression
Description
Recurses through a language object (e.g., a function body) and returns every
character constant it contains. Used by .fnsReachableFrom() to detect
string-based dynamic dispatch (e.g., do.call("helperA", ...)).
Usage
.charLiteralsIn(expr)
Value
Character vector of the string literals found (possibly empty).