Struct rustc_session::search_paths::SearchPathFile

pub struct SearchPathFile {
    pub path: PathBuf,
    pub file_name_str: Option<String>,
}

The obvious implementation of SearchPath::files is a Vec<PathBuf>. But it is searched repeatedly by find_library_crate, and the searches involve checking the prefix and suffix of the filename of each PathBuf. This is doable, but very slow, because it involves calls to file_name and extension that are themselves slow.

This type augments the PathBuf with an Option<String> containing the PathBuf’s filename. The prefix and suffix checking is much faster on the Option<String> than the PathBuf. (It’s an Option because Path::file_name can fail; if that happens then all subsequent checking will also fail, which is fine.)

Fields

path: PathBuf

file_name_str: Option<String>

Implementations

impl SearchPathFile

fn new(path: PathBuf) -> SearchPathFile

Trait Implementations

impl Clone for SearchPathFile

fn clone(&self) -> SearchPathFile

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SearchPathFile

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 48 bytes