908 lines
17 KiB
Rust
908 lines
17 KiB
Rust
use either::Either;
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use hir::{AssocItem, MacroDef, Module, ModuleDef, Name, PathResolution, ScopeDef};
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use ide_db::{
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defs::{Definition, NameRefClass},
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search::SearchScope,
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};
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use syntax::{
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algo::SyntaxRewriter,
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ast::{self, make},
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AstNode, Direction, SyntaxNode, SyntaxToken, T,
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};
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use crate::{
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assist_context::{AssistContext, Assists},
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AssistId, AssistKind,
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};
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// Assist: expand_glob_import
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//
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// Expands glob imports.
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//
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// ```
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// mod foo {
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// pub struct Bar;
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// pub struct Baz;
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// }
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//
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// use foo::*$0;
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//
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// fn qux(bar: Bar, baz: Baz) {}
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// ```
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// ->
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// ```
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// mod foo {
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// pub struct Bar;
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// pub struct Baz;
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// }
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//
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// use foo::{Baz, Bar};
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//
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// fn qux(bar: Bar, baz: Baz) {}
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// ```
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pub(crate) fn expand_glob_import(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
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let star = ctx.find_token_syntax_at_offset(T![*])?;
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let (parent, mod_path) = find_parent_and_path(&star)?;
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let target_module = match ctx.sema.resolve_path(&mod_path)? {
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PathResolution::Def(ModuleDef::Module(it)) => it,
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_ => return None,
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};
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let current_scope = ctx.sema.scope(&star.parent());
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let current_module = current_scope.module()?;
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let refs_in_target = find_refs_in_mod(ctx, target_module, Some(current_module))?;
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let imported_defs = find_imported_defs(ctx, star)?;
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let names_to_import = find_names_to_import(ctx, refs_in_target, imported_defs);
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let target = parent.clone().either(|n| n.syntax().clone(), |n| n.syntax().clone());
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acc.add(
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AssistId("expand_glob_import", AssistKind::RefactorRewrite),
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"Expand glob import",
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target.text_range(),
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|builder| {
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let mut rewriter = SyntaxRewriter::default();
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replace_ast(&mut rewriter, parent, mod_path, names_to_import);
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builder.rewrite(rewriter);
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},
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)
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}
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fn find_parent_and_path(
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star: &SyntaxToken,
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) -> Option<(Either<ast::UseTree, ast::UseTreeList>, ast::Path)> {
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return star.ancestors().find_map(|n| {
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find_use_tree_list(n.clone())
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.and_then(|(u, p)| Some((Either::Right(u), p)))
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.or_else(|| find_use_tree(n).and_then(|(u, p)| Some((Either::Left(u), p))))
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});
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fn find_use_tree_list(n: SyntaxNode) -> Option<(ast::UseTreeList, ast::Path)> {
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let use_tree_list = ast::UseTreeList::cast(n)?;
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let path = use_tree_list.parent_use_tree().path()?;
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Some((use_tree_list, path))
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}
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fn find_use_tree(n: SyntaxNode) -> Option<(ast::UseTree, ast::Path)> {
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let use_tree = ast::UseTree::cast(n)?;
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let path = use_tree.path()?;
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Some((use_tree, path))
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}
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}
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#[derive(Debug, PartialEq, Clone)]
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enum Def {
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ModuleDef(ModuleDef),
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MacroDef(MacroDef),
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}
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impl Def {
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fn is_referenced_in(&self, ctx: &AssistContext) -> bool {
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let def = match self {
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Def::ModuleDef(def) => Definition::ModuleDef(*def),
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Def::MacroDef(def) => Definition::Macro(*def),
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};
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let search_scope = SearchScope::single_file(ctx.frange.file_id);
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def.usages(&ctx.sema).in_scope(search_scope).at_least_one()
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}
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}
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#[derive(Debug, Clone)]
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struct Ref {
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// could be alias
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visible_name: Name,
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def: Def,
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}
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impl Ref {
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fn from_scope_def(name: Name, scope_def: ScopeDef) -> Option<Self> {
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match scope_def {
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ScopeDef::ModuleDef(def) => Some(Ref { visible_name: name, def: Def::ModuleDef(def) }),
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ScopeDef::MacroDef(def) => Some(Ref { visible_name: name, def: Def::MacroDef(def) }),
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_ => None,
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}
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}
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}
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#[derive(Debug, Clone)]
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struct Refs(Vec<Ref>);
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impl Refs {
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fn used_refs(&self, ctx: &AssistContext) -> Refs {
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Refs(
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self.0
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.clone()
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.into_iter()
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.filter(|r| {
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if let Def::ModuleDef(ModuleDef::Trait(tr)) = r.def {
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if tr
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.items(ctx.db())
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.into_iter()
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.find(|ai| {
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if let AssocItem::Function(f) = *ai {
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Def::ModuleDef(ModuleDef::Function(f)).is_referenced_in(ctx)
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} else {
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false
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}
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})
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.is_some()
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{
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return true;
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}
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}
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r.def.is_referenced_in(ctx)
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})
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.collect(),
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)
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}
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fn filter_out_by_defs(&self, defs: Vec<Def>) -> Refs {
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Refs(self.0.clone().into_iter().filter(|r| !defs.contains(&r.def)).collect())
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}
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}
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fn find_refs_in_mod(
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ctx: &AssistContext,
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module: Module,
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visible_from: Option<Module>,
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) -> Option<Refs> {
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if let Some(from) = visible_from {
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if !is_mod_visible_from(ctx, module, from) {
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return None;
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}
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}
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let module_scope = module.scope(ctx.db(), visible_from);
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let refs = module_scope.into_iter().filter_map(|(n, d)| Ref::from_scope_def(n, d)).collect();
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Some(Refs(refs))
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}
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fn is_mod_visible_from(ctx: &AssistContext, module: Module, from: Module) -> bool {
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match module.parent(ctx.db()) {
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Some(parent) => {
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parent.visibility_of(ctx.db(), &ModuleDef::Module(module)).map_or(true, |vis| {
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vis.is_visible_from(ctx.db(), from.into()) && is_mod_visible_from(ctx, parent, from)
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})
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}
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None => true,
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}
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}
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// looks for name refs in parent use block's siblings
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//
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// mod bar {
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// mod qux {
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// struct Qux;
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// }
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//
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// pub use qux::Qux;
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// }
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//
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// ↓ ---------------
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// use foo::*$0;
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// use baz::Baz;
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// ↑ ---------------
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fn find_imported_defs(ctx: &AssistContext, star: SyntaxToken) -> Option<Vec<Def>> {
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let parent_use_item_syntax =
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star.ancestors().find_map(|n| if ast::Use::can_cast(n.kind()) { Some(n) } else { None })?;
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Some(
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[Direction::Prev, Direction::Next]
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.iter()
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.map(|dir| {
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parent_use_item_syntax
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.siblings(dir.to_owned())
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.filter(|n| ast::Use::can_cast(n.kind()))
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})
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.flatten()
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.filter_map(|n| Some(n.descendants().filter_map(ast::NameRef::cast)))
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.flatten()
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.filter_map(|r| match NameRefClass::classify(&ctx.sema, &r)? {
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NameRefClass::Definition(Definition::ModuleDef(def)) => Some(Def::ModuleDef(def)),
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NameRefClass::Definition(Definition::Macro(def)) => Some(Def::MacroDef(def)),
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_ => None,
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})
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.collect(),
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)
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}
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fn find_names_to_import(
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ctx: &AssistContext,
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refs_in_target: Refs,
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imported_defs: Vec<Def>,
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) -> Vec<Name> {
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let used_refs = refs_in_target.used_refs(ctx).filter_out_by_defs(imported_defs);
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used_refs.0.iter().map(|r| r.visible_name.clone()).collect()
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}
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fn replace_ast(
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rewriter: &mut SyntaxRewriter,
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parent: Either<ast::UseTree, ast::UseTreeList>,
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path: ast::Path,
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names_to_import: Vec<Name>,
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) {
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let existing_use_trees = match parent.clone() {
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Either::Left(_) => vec![],
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Either::Right(u) => u
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.use_trees()
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.filter(|n|
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// filter out star
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n.star_token().is_none())
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.collect(),
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};
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let new_use_trees: Vec<ast::UseTree> = names_to_import
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.iter()
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.map(|n| {
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let path = make::path_unqualified(make::path_segment(make::name_ref(&n.to_string())));
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make::use_tree(path, None, None, false)
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})
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.collect();
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let use_trees = [&existing_use_trees[..], &new_use_trees[..]].concat();
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match use_trees.as_slice() {
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[name] => {
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if let Some(end_path) = name.path() {
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rewriter.replace_ast(
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&parent.left_or_else(|tl| tl.parent_use_tree()),
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&make::use_tree(make::path_concat(path, end_path), None, None, false),
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);
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}
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}
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names => match &parent {
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Either::Left(parent) => rewriter.replace_ast(
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parent,
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&make::use_tree(path, Some(make::use_tree_list(names.to_owned())), None, false),
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),
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Either::Right(parent) => {
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rewriter.replace_ast(parent, &make::use_tree_list(names.to_owned()))
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}
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},
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};
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}
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#[cfg(test)]
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mod tests {
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use crate::tests::{check_assist, check_assist_not_applicable};
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use super::*;
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#[test]
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fn expanding_glob_import() {
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check_assist(
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expand_glob_import,
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r"
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mod foo {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
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pub fn f() {}
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}
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use foo::*$0;
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fn qux(bar: Bar, baz: Baz) {
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f();
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}
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",
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r"
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mod foo {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
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pub fn f() {}
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}
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use foo::{Baz, Bar, f};
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fn qux(bar: Bar, baz: Baz) {
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f();
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}
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",
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)
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}
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#[test]
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fn expanding_glob_import_with_existing_explicit_names() {
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check_assist(
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expand_glob_import,
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r"
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mod foo {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
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pub fn f() {}
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}
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use foo::{*$0, f};
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fn qux(bar: Bar, baz: Baz) {
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f();
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}
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",
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r"
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mod foo {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
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pub fn f() {}
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}
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use foo::{f, Baz, Bar};
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fn qux(bar: Bar, baz: Baz) {
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f();
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}
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",
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)
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}
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#[test]
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fn expanding_glob_import_with_existing_uses_in_same_module() {
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check_assist(
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expand_glob_import,
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r"
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mod foo {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
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pub fn f() {}
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}
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use foo::Bar;
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use foo::{*$0, f};
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fn qux(bar: Bar, baz: Baz) {
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f();
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}
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",
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r"
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mod foo {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
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pub fn f() {}
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}
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use foo::Bar;
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use foo::{f, Baz};
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fn qux(bar: Bar, baz: Baz) {
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f();
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}
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",
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)
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}
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#[test]
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fn expanding_nested_glob_import() {
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check_assist(
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expand_glob_import,
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r"
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mod foo {
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pub mod bar {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
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pub fn f() {}
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}
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pub mod baz {
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pub fn g() {}
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}
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}
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use foo::{bar::{*$0, f}, baz::*};
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fn qux(bar: Bar, baz: Baz) {
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f();
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g();
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}
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",
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r"
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mod foo {
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pub mod bar {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
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pub fn f() {}
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}
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pub mod baz {
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pub fn g() {}
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}
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}
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use foo::{bar::{f, Baz, Bar}, baz::*};
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fn qux(bar: Bar, baz: Baz) {
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f();
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g();
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}
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",
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);
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check_assist(
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expand_glob_import,
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r"
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mod foo {
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pub mod bar {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
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pub fn f() {}
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}
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pub mod baz {
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pub fn g() {}
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}
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}
|
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use foo::{bar::{Bar, Baz, f}, baz::*$0};
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fn qux(bar: Bar, baz: Baz) {
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f();
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g();
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}
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",
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r"
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mod foo {
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pub mod bar {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
|
|
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pub fn f() {}
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}
|
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|
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pub mod baz {
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pub fn g() {}
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}
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}
|
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use foo::{bar::{Bar, Baz, f}, baz::g};
|
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fn qux(bar: Bar, baz: Baz) {
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f();
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g();
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}
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",
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);
|
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|
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check_assist(
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expand_glob_import,
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r"
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mod foo {
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pub mod bar {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
|
|
|
|
pub fn f() {}
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}
|
|
|
|
pub mod baz {
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pub fn g() {}
|
|
|
|
pub mod qux {
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pub fn h() {}
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pub fn m() {}
|
|
|
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pub mod q {
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pub fn j() {}
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}
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}
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}
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}
|
|
|
|
use foo::{
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bar::{*, f},
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baz::{g, qux::*$0}
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};
|
|
|
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fn qux(bar: Bar, baz: Baz) {
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f();
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g();
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h();
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q::j();
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}
|
|
",
|
|
r"
|
|
mod foo {
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pub mod bar {
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pub struct Bar;
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pub struct Baz;
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pub struct Qux;
|
|
|
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pub fn f() {}
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}
|
|
|
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pub mod baz {
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pub fn g() {}
|
|
|
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pub mod qux {
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pub fn h() {}
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pub fn m() {}
|
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|
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pub mod q {
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pub fn j() {}
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}
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}
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}
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}
|
|
|
|
use foo::{
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bar::{*, f},
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baz::{g, qux::{q, h}}
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};
|
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|
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fn qux(bar: Bar, baz: Baz) {
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f();
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g();
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h();
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q::j();
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}
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",
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);
|
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|
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check_assist(
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expand_glob_import,
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r"
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mod foo {
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pub mod bar {
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pub struct Bar;
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pub struct Baz;
|
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pub struct Qux;
|
|
|
|
pub fn f() {}
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}
|
|
|
|
pub mod baz {
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pub fn g() {}
|
|
|
|
pub mod qux {
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pub fn h() {}
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pub fn m() {}
|
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|
|
pub mod q {
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pub fn j() {}
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}
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}
|
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}
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|
}
|
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|
|
use foo::{
|
|
bar::{*, f},
|
|
baz::{g, qux::{h, q::*$0}}
|
|
};
|
|
|
|
fn qux(bar: Bar, baz: Baz) {
|
|
f();
|
|
g();
|
|
h();
|
|
j();
|
|
}
|
|
",
|
|
r"
|
|
mod foo {
|
|
pub mod bar {
|
|
pub struct Bar;
|
|
pub struct Baz;
|
|
pub struct Qux;
|
|
|
|
pub fn f() {}
|
|
}
|
|
|
|
pub mod baz {
|
|
pub fn g() {}
|
|
|
|
pub mod qux {
|
|
pub fn h() {}
|
|
pub fn m() {}
|
|
|
|
pub mod q {
|
|
pub fn j() {}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
use foo::{
|
|
bar::{*, f},
|
|
baz::{g, qux::{h, q::j}}
|
|
};
|
|
|
|
fn qux(bar: Bar, baz: Baz) {
|
|
f();
|
|
g();
|
|
h();
|
|
j();
|
|
}
|
|
",
|
|
);
|
|
|
|
check_assist(
|
|
expand_glob_import,
|
|
r"
|
|
mod foo {
|
|
pub mod bar {
|
|
pub struct Bar;
|
|
pub struct Baz;
|
|
pub struct Qux;
|
|
|
|
pub fn f() {}
|
|
}
|
|
|
|
pub mod baz {
|
|
pub fn g() {}
|
|
|
|
pub mod qux {
|
|
pub fn h() {}
|
|
pub fn m() {}
|
|
|
|
pub mod q {
|
|
pub fn j() {}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
use foo::{
|
|
bar::{*, f},
|
|
baz::{g, qux::{q::j, *$0}}
|
|
};
|
|
|
|
fn qux(bar: Bar, baz: Baz) {
|
|
f();
|
|
g();
|
|
h();
|
|
j();
|
|
}
|
|
",
|
|
r"
|
|
mod foo {
|
|
pub mod bar {
|
|
pub struct Bar;
|
|
pub struct Baz;
|
|
pub struct Qux;
|
|
|
|
pub fn f() {}
|
|
}
|
|
|
|
pub mod baz {
|
|
pub fn g() {}
|
|
|
|
pub mod qux {
|
|
pub fn h() {}
|
|
pub fn m() {}
|
|
|
|
pub mod q {
|
|
pub fn j() {}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
use foo::{
|
|
bar::{*, f},
|
|
baz::{g, qux::{q::j, h}}
|
|
};
|
|
|
|
fn qux(bar: Bar, baz: Baz) {
|
|
f();
|
|
g();
|
|
h();
|
|
j();
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn expanding_glob_import_with_macro_defs() {
|
|
// FIXME: this is currently fails because `Definition::find_usages` ignores macros
|
|
// https://github.com/rust-analyzer/rust-analyzer/issues/3484
|
|
//
|
|
// check_assist(
|
|
// expand_glob_import,
|
|
// r"
|
|
// //- /lib.rs crate:foo
|
|
// #[macro_export]
|
|
// macro_rules! bar {
|
|
// () => ()
|
|
// }
|
|
|
|
// pub fn baz() {}
|
|
|
|
// //- /main.rs crate:main deps:foo
|
|
// use foo::*$0;
|
|
|
|
// fn main() {
|
|
// bar!();
|
|
// baz();
|
|
// }
|
|
// ",
|
|
// r"
|
|
// use foo::{bar, baz};
|
|
|
|
// fn main() {
|
|
// bar!();
|
|
// baz();
|
|
// }
|
|
// ",
|
|
// )
|
|
}
|
|
|
|
#[test]
|
|
fn expanding_glob_import_with_trait_method_uses() {
|
|
check_assist(
|
|
expand_glob_import,
|
|
r"
|
|
//- /lib.rs crate:foo
|
|
pub trait Tr {
|
|
fn method(&self) {}
|
|
}
|
|
impl Tr for () {}
|
|
|
|
//- /main.rs crate:main deps:foo
|
|
use foo::*$0;
|
|
|
|
fn main() {
|
|
().method();
|
|
}
|
|
",
|
|
r"
|
|
use foo::Tr;
|
|
|
|
fn main() {
|
|
().method();
|
|
}
|
|
",
|
|
);
|
|
|
|
check_assist(
|
|
expand_glob_import,
|
|
r"
|
|
//- /lib.rs crate:foo
|
|
pub trait Tr {
|
|
fn method(&self) {}
|
|
}
|
|
impl Tr for () {}
|
|
|
|
pub trait Tr2 {
|
|
fn method2(&self) {}
|
|
}
|
|
impl Tr2 for () {}
|
|
|
|
//- /main.rs crate:main deps:foo
|
|
use foo::*$0;
|
|
|
|
fn main() {
|
|
().method();
|
|
}
|
|
",
|
|
r"
|
|
use foo::Tr;
|
|
|
|
fn main() {
|
|
().method();
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn expanding_is_not_applicable_if_target_module_is_not_accessible_from_current_scope() {
|
|
check_assist_not_applicable(
|
|
expand_glob_import,
|
|
r"
|
|
mod foo {
|
|
mod bar {
|
|
pub struct Bar;
|
|
}
|
|
}
|
|
|
|
use foo::bar::*$0;
|
|
|
|
fn baz(bar: Bar) {}
|
|
",
|
|
);
|
|
|
|
check_assist_not_applicable(
|
|
expand_glob_import,
|
|
r"
|
|
mod foo {
|
|
mod bar {
|
|
pub mod baz {
|
|
pub struct Baz;
|
|
}
|
|
}
|
|
}
|
|
|
|
use foo::bar::baz::*$0;
|
|
|
|
fn qux(baz: Baz) {}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn expanding_is_not_applicable_if_cursor_is_not_in_star_token() {
|
|
check_assist_not_applicable(
|
|
expand_glob_import,
|
|
r"
|
|
mod foo {
|
|
pub struct Bar;
|
|
pub struct Baz;
|
|
pub struct Qux;
|
|
}
|
|
|
|
use foo::Bar$0;
|
|
|
|
fn qux(bar: Bar, baz: Baz) {}
|
|
",
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn expanding_glob_import_single_nested_glob_only() {
|
|
check_assist(
|
|
expand_glob_import,
|
|
r"
|
|
mod foo {
|
|
pub struct Bar;
|
|
}
|
|
|
|
use foo::{*$0};
|
|
|
|
struct Baz {
|
|
bar: Bar
|
|
}
|
|
",
|
|
r"
|
|
mod foo {
|
|
pub struct Bar;
|
|
}
|
|
|
|
use foo::Bar;
|
|
|
|
struct Baz {
|
|
bar: Bar
|
|
}
|
|
",
|
|
);
|
|
}
|
|
}
|