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Merge imports assist

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Work towards #2220
This commit is contained in:
Aleksey Kladov 2020-03-18 16:41:24 +01:00
parent 4e50efcfc5
commit 3f6dc20d3c
8 changed files with 225 additions and 25 deletions
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20
crates/ra_syntax/src/ast/edit.rs
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@ -273,6 +273,26 @@ impl ast::UseTree {
}
self.clone()
}
#[must_use]
pub fn split_prefix(&self, prefix: &ast::Path) -> ast::UseTree {
let suffix = match split_path_prefix(&prefix) {
Some(it) => it,
None => return self.clone(),
};
let use_tree = make::use_tree(suffix.clone(), self.use_tree_list(), self.alias());
let nested = make::use_tree_list(iter::once(use_tree));
return make::use_tree(prefix.clone(), Some(nested), None);
fn split_path_prefix(prefix: &ast::Path) -> Option<ast::Path> {
let parent = prefix.parent_path()?;
let mut res = make::path_unqualified(parent.segment()?);
for p in iter::successors(parent.parent_path(), |it| it.parent_path()) {
res = make::path_qualified(res, p.segment()?);
}
Some(res)
}
}
}
#[must_use]