pub fn isSupportedInputExtension(ext: []const u8) bool
pub fn isSupportedInputExtension(ext: []const u8) bool { if (std.ascii.eqlIgnoreCase(ext, ".rc")) return true; if (std.ascii.eqlIgnoreCase(ext, ".res")) return true; if (std.ascii.eqlIgnoreCase(ext, ".rcpp")) return true; return false; }