Module parser_parse_function_args 

Node: cxx:Method:Luau.Ast:Ast/src/Parser.cpp:4068:parseFunctionArgs

Faithful port of Parser::parseFunctionArgs — the function-call argument parser (args ::= '(' [explist] ')' | tableconstructor | String). Each variant produces an AstExprCall node; the parenthesised branch collects comma positions under store_cst_data and records CST open/close parens.