pub fn preprocess_str<T: AsRef<Path>, U: AsRef<Path>, V: BuildHasher>(
s: &str,
path: T,
pre_defines: &Defines<V>,
include_paths: &[U],
ignore_include: bool,
strip_comments: bool,
resolve_depth: usize,
include_depth: usize
) -> Result<(PreprocessedText, Defines), Error>