use std::rc::Rc;
pub type LineFile = (usize, Rc<str>);
pub const FILE_INDEX_FOR_BUILTIN: usize = 0;
pub const DEFAULT_MANGLED_FN_PARAM_PREFIX: &str = "__";
pub fn default_line_file() -> LineFile {
(0, Rc::from(""))
}
pub fn is_default_line_file(line_file: &LineFile) -> bool {
line_file.0 == 0 && line_file.1.is_empty()
}