//! This module resolves `mod foo;` declaration to file.
use hir_expand::name::Name;
-use ra_db::{FileId, RelativePathBuf};
+use ra_db::FileId;
use ra_syntax::SmolStr;
use crate::{db::DefDatabase, HirFileId};
#[derive(Clone, Debug)]
pub(super) struct ModDir {
- /// `.` for `mod.rs`, `lib.rs`
- /// `./foo` for `foo.rs`
- /// `./foo/bar` for `mod bar { mod x; }` nested in `foo.rs`
- path: RelativePathBuf,
+ /// `` for `mod.rs`, `lib.rs`
+ /// `foo/` for `foo.rs`
+ /// `foo/bar/` for `mod bar { mod x; }` nested in `foo.rs`
+ /// Invariant: path.is_empty() || path.ends_with('/')
+ dir_path: DirPath,
/// inside `./foo.rs`, mods with `#[path]` should *not* be relative to `./foo/`
root_non_dir_owner: bool,
}
impl ModDir {
pub(super) fn root() -> ModDir {
- ModDir { path: RelativePathBuf::default(), root_non_dir_owner: false }
+ ModDir { dir_path: DirPath::empty(), root_non_dir_owner: false }
}
pub(super) fn descend_into_definition(
name: &Name,
attr_path: Option<&SmolStr>,
) -> ModDir {
- let mut path = self.path.clone();
- match attr_to_path(attr_path) {
- None => path.push(&name.to_string()),
+ let path = match attr_path.map(|it| it.as_str()) {
+ None => {
+ let mut path = self.dir_path.clone();
+ path.push(&name.to_string());
+ path
+ }
Some(attr_path) => {
- if self.root_non_dir_owner {
- assert!(path.pop());
+ let mut path = self.dir_path.join_attr(attr_path, self.root_non_dir_owner);
+ if !(path.is_empty() || path.ends_with('/')) {
+ path.push('/')
}
- path.push(attr_path);
+ DirPath::new(path)
}
- }
- ModDir { path, root_non_dir_owner: false }
+ };
+ ModDir { dir_path: path, root_non_dir_owner: false }
}
pub(super) fn resolve_declaration(
let file_id = file_id.original_file(db.upcast());
let mut candidate_files = Vec::new();
- match attr_to_path(attr_path) {
+ match attr_path {
Some(attr_path) => {
- let base =
- if self.root_non_dir_owner { self.path.parent().unwrap() } else { &self.path };
- candidate_files.push(base.join(attr_path).to_string())
+ candidate_files.push(self.dir_path.join_attr(attr_path, self.root_non_dir_owner))
}
None => {
- candidate_files.push(self.path.join(&format!("{}.rs", name)).to_string());
- candidate_files.push(self.path.join(&format!("{}/mod.rs", name)).to_string());
+ candidate_files.push(format!("{}{}.rs", self.dir_path.0, name));
+ candidate_files.push(format!("{}{}/mod.rs", self.dir_path.0, name));
}
};
for candidate in candidate_files.iter() {
if let Some(file_id) = db.resolve_path(file_id, candidate.as_str()) {
- let mut root_non_dir_owner = false;
- let mut mod_path = RelativePathBuf::new();
let is_mod_rs = candidate.ends_with("mod.rs");
- if !(is_mod_rs || attr_path.is_some()) {
- root_non_dir_owner = true;
- mod_path.push(&name.to_string());
- }
- return Ok((file_id, is_mod_rs, ModDir { path: mod_path, root_non_dir_owner }));
+
+ let (dir_path, root_non_dir_owner) = if is_mod_rs || attr_path.is_some() {
+ (DirPath::empty(), false)
+ } else {
+ (DirPath::new(format!("{}/", name)), true)
+ };
+ return Ok((file_id, is_mod_rs, ModDir { dir_path, root_non_dir_owner }));
}
}
Err(candidate_files.remove(0))
}
}
-fn attr_to_path(attr: Option<&SmolStr>) -> Option<RelativePathBuf> {
- attr.and_then(|it| RelativePathBuf::from_path(&it.replace("\\", "/")).ok())
+#[derive(Clone, Debug)]
+struct DirPath(String);
+
+impl DirPath {
+ fn assert_invariant(&self) {
+ assert!(self.0.is_empty() || self.0.ends_with('/'));
+ }
+ fn new(repr: String) -> DirPath {
+ let res = DirPath(repr);
+ res.assert_invariant();
+ res
+ }
+ fn empty() -> DirPath {
+ DirPath::new(String::new())
+ }
+ fn push(&mut self, name: &str) {
+ self.0.push_str(name);
+ self.0.push('/');
+ self.assert_invariant();
+ }
+ fn parent(&self) -> Option<&str> {
+ if self.0.is_empty() {
+ return None;
+ };
+ let idx =
+ self.0[..self.0.len() - '/'.len_utf8()].rfind('/').map_or(0, |it| it + '/'.len_utf8());
+ Some(&self.0[..idx])
+ }
+ /// So this is the case which doesn't really work I think if we try to be
+ /// 100% platform agnostic:
+ ///
+ /// ```
+ /// mod a {
+ /// #[path="C://sad/face"]
+ /// mod b { mod c; }
+ /// }
+ /// ```
+ ///
+ /// Here, we need to join logical dir path to a string path from an
+ /// attribute. Ideally, we should somehow losslessly communicate the whole
+ /// construction to `FileLoader`.
+ fn join_attr(&self, mut attr: &str, relative_to_parent: bool) -> String {
+ let base = if relative_to_parent { self.parent().unwrap() } else { &self.0 };
+
+ if attr.starts_with("./") {
+ attr = &attr["./".len()..];
+ }
+ let tmp;
+ let attr = if attr.contains('\\') {
+ tmp = attr.replace('\\', "/");
+ &tmp
+ } else {
+ attr
+ };
+ let res = format!("{}{}", base, attr);
+ res
+ }
}
projects / rust.git / blobdiff