897 lines
16 KiB
Rust
897 lines
16 KiB
Rust
use hir::HasSource;
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use ide_db::traits::resolve_target_trait;
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use syntax::ast::{self, make, AstNode};
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use crate::{
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assist_context::{AssistContext, Assists},
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utils::{
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add_trait_assoc_items_to_impl, filter_assoc_items, gen_trait_fn_body, render_snippet,
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Cursor, DefaultMethods,
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},
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AssistId, AssistKind,
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};
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// Assist: add_impl_missing_members
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//
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// Adds scaffold for required impl members.
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//
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// ```
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// trait Trait<T> {
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// type X;
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// fn foo(&self) -> T;
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// fn bar(&self) {}
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// }
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//
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// impl Trait<u32> for () {$0
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//
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// }
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// ```
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// ->
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// ```
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// trait Trait<T> {
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// type X;
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// fn foo(&self) -> T;
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// fn bar(&self) {}
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// }
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//
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// impl Trait<u32> for () {
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// $0type X;
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//
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// fn foo(&self) -> u32 {
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// todo!()
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// }
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// }
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// ```
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pub(crate) fn add_missing_impl_members(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
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add_missing_impl_members_inner(
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acc,
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ctx,
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DefaultMethods::No,
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"add_impl_missing_members",
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"Implement missing members",
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)
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}
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// Assist: add_impl_default_members
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//
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// Adds scaffold for overriding default impl members.
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//
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// ```
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// trait Trait {
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// type X;
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// fn foo(&self);
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// fn bar(&self) {}
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// }
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//
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// impl Trait for () {
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// type X = ();
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// fn foo(&self) {}$0
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// }
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// ```
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// ->
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// ```
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// trait Trait {
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// type X;
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// fn foo(&self);
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// fn bar(&self) {}
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// }
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//
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// impl Trait for () {
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// type X = ();
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// fn foo(&self) {}
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//
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// $0fn bar(&self) {}
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// }
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// ```
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pub(crate) fn add_missing_default_members(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
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add_missing_impl_members_inner(
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acc,
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ctx,
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DefaultMethods::Only,
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"add_impl_default_members",
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"Implement default members",
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)
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}
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fn add_missing_impl_members_inner(
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acc: &mut Assists,
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ctx: &AssistContext,
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mode: DefaultMethods,
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assist_id: &'static str,
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label: &'static str,
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) -> Option<()> {
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let _p = profile::span("add_missing_impl_members_inner");
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let impl_def = ctx.find_node_at_offset::<ast::Impl>()?;
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let trait_ = resolve_target_trait(&ctx.sema, &impl_def)?;
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let missing_items = filter_assoc_items(
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ctx.db(),
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&ide_db::traits::get_missing_assoc_items(&ctx.sema, &impl_def),
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mode,
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);
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if missing_items.is_empty() {
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return None;
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}
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let target = impl_def.syntax().text_range();
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acc.add(AssistId(assist_id, AssistKind::QuickFix), label, target, |builder| {
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let target_scope = ctx.sema.scope(impl_def.syntax());
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let (new_impl_def, first_new_item) = add_trait_assoc_items_to_impl(
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&ctx.sema,
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missing_items,
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trait_,
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impl_def.clone(),
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target_scope,
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);
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match ctx.config.snippet_cap {
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None => builder.replace(target, new_impl_def.to_string()),
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Some(cap) => {
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let mut cursor = Cursor::Before(first_new_item.syntax());
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let placeholder;
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if let ast::AssocItem::Fn(func) = &first_new_item {
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if try_gen_trait_body(ctx, func, &trait_, &impl_def).is_none() {
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if let Some(m) = func.syntax().descendants().find_map(ast::MacroCall::cast)
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{
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if m.syntax().text() == "todo!()" {
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placeholder = m;
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cursor = Cursor::Replace(placeholder.syntax());
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}
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}
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}
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}
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builder.replace_snippet(
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cap,
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target,
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render_snippet(cap, new_impl_def.syntax(), cursor),
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)
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}
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};
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})
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}
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fn try_gen_trait_body(
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ctx: &AssistContext,
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func: &ast::Fn,
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trait_: &hir::Trait,
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impl_def: &ast::Impl,
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) -> Option<()> {
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let trait_path = make::ext::ident_path(&trait_.name(ctx.db()).to_string());
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let hir_ty = ctx.sema.resolve_type(&impl_def.self_ty()?)?;
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let adt = hir_ty.as_adt()?.source(ctx.db())?;
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gen_trait_fn_body(func, &trait_path, &adt.value)
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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 test_add_missing_impl_members() {
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check_assist(
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add_missing_impl_members,
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r#"
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trait Foo {
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type Output;
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const CONST: usize = 42;
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fn foo(&self);
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fn bar(&self);
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fn baz(&self);
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}
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struct S;
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impl Foo for S {
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fn bar(&self) {}
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$0
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}"#,
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r#"
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trait Foo {
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type Output;
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const CONST: usize = 42;
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fn foo(&self);
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fn bar(&self);
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fn baz(&self);
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}
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struct S;
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impl Foo for S {
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fn bar(&self) {}
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$0type Output;
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const CONST: usize = 42;
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fn foo(&self) {
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todo!()
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}
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fn baz(&self) {
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todo!()
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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 test_copied_overriden_members() {
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check_assist(
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add_missing_impl_members,
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r#"
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trait Foo {
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fn foo(&self);
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fn bar(&self) -> bool { true }
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fn baz(&self) -> u32 { 42 }
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}
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struct S;
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impl Foo for S {
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fn bar(&self) {}
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$0
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}"#,
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r#"
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trait Foo {
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fn foo(&self);
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fn bar(&self) -> bool { true }
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fn baz(&self) -> u32 { 42 }
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}
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struct S;
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impl Foo for S {
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fn bar(&self) {}
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fn foo(&self) {
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${0:todo!()}
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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 test_empty_impl_def() {
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check_assist(
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add_missing_impl_members,
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r#"
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trait Foo { fn foo(&self); }
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struct S;
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impl Foo for S { $0 }"#,
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r#"
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trait Foo { fn foo(&self); }
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struct S;
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impl Foo for S {
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fn foo(&self) {
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${0:todo!()}
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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 test_impl_def_without_braces() {
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check_assist(
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add_missing_impl_members,
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r#"
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trait Foo { fn foo(&self); }
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struct S;
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impl Foo for S$0"#,
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r#"
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trait Foo { fn foo(&self); }
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struct S;
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impl Foo for S {
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fn foo(&self) {
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${0:todo!()}
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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 fill_in_type_params_1() {
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check_assist(
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add_missing_impl_members,
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r#"
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trait Foo<T> { fn foo(&self, t: T) -> &T; }
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struct S;
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impl Foo<u32> for S { $0 }"#,
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r#"
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trait Foo<T> { fn foo(&self, t: T) -> &T; }
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struct S;
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impl Foo<u32> for S {
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fn foo(&self, t: u32) -> &u32 {
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${0:todo!()}
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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 fill_in_type_params_2() {
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check_assist(
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add_missing_impl_members,
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r#"
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trait Foo<T> { fn foo(&self, t: T) -> &T; }
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struct S;
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impl<U> Foo<U> for S { $0 }"#,
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r#"
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trait Foo<T> { fn foo(&self, t: T) -> &T; }
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struct S;
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impl<U> Foo<U> for S {
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fn foo(&self, t: U) -> &U {
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${0:todo!()}
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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 test_cursor_after_empty_impl_def() {
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check_assist(
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add_missing_impl_members,
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r#"
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trait Foo { fn foo(&self); }
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struct S;
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impl Foo for S {}$0"#,
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r#"
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trait Foo { fn foo(&self); }
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struct S;
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impl Foo for S {
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fn foo(&self) {
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${0:todo!()}
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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 test_qualify_path_1() {
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check_assist(
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add_missing_impl_members,
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r#"
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mod foo {
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pub struct Bar;
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trait Foo { fn foo(&self, bar: Bar); }
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}
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struct S;
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impl foo::Foo for S { $0 }"#,
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r#"
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mod foo {
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pub struct Bar;
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trait Foo { fn foo(&self, bar: Bar); }
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}
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struct S;
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impl foo::Foo for S {
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fn foo(&self, bar: foo::Bar) {
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${0:todo!()}
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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 test_qualify_path_2() {
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check_assist(
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add_missing_impl_members,
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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 trait Foo { fn foo(&self, bar: Bar); }
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}
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}
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use foo::bar;
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struct S;
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impl bar::Foo for S { $0 }"#,
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r#"
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mod foo {
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pub mod bar {
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pub struct Bar;
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pub trait Foo { fn foo(&self, bar: Bar); }
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}
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}
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use foo::bar;
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struct S;
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impl bar::Foo for S {
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fn foo(&self, bar: bar::Bar) {
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${0:todo!()}
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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 test_qualify_path_generic() {
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check_assist(
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add_missing_impl_members,
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r#"
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mod foo {
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pub struct Bar<T>;
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trait Foo { fn foo(&self, bar: Bar<u32>); }
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}
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struct S;
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impl foo::Foo for S { $0 }"#,
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r#"
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mod foo {
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pub struct Bar<T>;
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trait Foo { fn foo(&self, bar: Bar<u32>); }
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}
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struct S;
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impl foo::Foo for S {
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fn foo(&self, bar: foo::Bar<u32>) {
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${0:todo!()}
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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 test_qualify_path_and_substitute_param() {
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check_assist(
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add_missing_impl_members,
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r#"
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mod foo {
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pub struct Bar<T>;
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trait Foo<T> { fn foo(&self, bar: Bar<T>); }
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}
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struct S;
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impl foo::Foo<u32> for S { $0 }"#,
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r#"
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mod foo {
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pub struct Bar<T>;
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trait Foo<T> { fn foo(&self, bar: Bar<T>); }
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}
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struct S;
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impl foo::Foo<u32> for S {
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fn foo(&self, bar: foo::Bar<u32>) {
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${0:todo!()}
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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 test_substitute_param_no_qualify() {
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// when substituting params, the substituted param should not be qualified!
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check_assist(
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add_missing_impl_members,
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r#"
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mod foo {
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trait Foo<T> { fn foo(&self, bar: T); }
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pub struct Param;
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}
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struct Param;
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struct S;
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impl foo::Foo<Param> for S { $0 }"#,
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r#"
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mod foo {
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trait Foo<T> { fn foo(&self, bar: T); }
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pub struct Param;
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}
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struct Param;
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struct S;
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impl foo::Foo<Param> for S {
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fn foo(&self, bar: Param) {
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${0:todo!()}
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}
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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 test_qualify_path_associated_item() {
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check_assist(
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add_missing_impl_members,
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r#"
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mod foo {
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pub struct Bar<T>;
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impl Bar<T> { type Assoc = u32; }
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trait Foo { fn foo(&self, bar: Bar<u32>::Assoc); }
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}
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struct S;
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impl foo::Foo for S { $0 }"#,
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r#"
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mod foo {
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pub struct Bar<T>;
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impl Bar<T> { type Assoc = u32; }
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trait Foo { fn foo(&self, bar: Bar<u32>::Assoc); }
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}
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struct S;
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impl foo::Foo for S {
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fn foo(&self, bar: foo::Bar<u32>::Assoc) {
|
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${0:todo!()}
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}
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}"#,
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);
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}
|
|
|
|
#[test]
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fn test_qualify_path_nested() {
|
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check_assist(
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add_missing_impl_members,
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r#"
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mod foo {
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pub struct Bar<T>;
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pub struct Baz;
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trait Foo { fn foo(&self, bar: Bar<Baz>); }
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}
|
|
struct S;
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impl foo::Foo for S { $0 }"#,
|
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r#"
|
|
mod foo {
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pub struct Bar<T>;
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pub struct Baz;
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trait Foo { fn foo(&self, bar: Bar<Baz>); }
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}
|
|
struct S;
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impl foo::Foo for S {
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fn foo(&self, bar: foo::Bar<foo::Baz>) {
|
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${0:todo!()}
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}
|
|
}"#,
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);
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}
|
|
|
|
#[test]
|
|
fn test_qualify_path_fn_trait_notation() {
|
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check_assist(
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add_missing_impl_members,
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r#"
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mod foo {
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pub trait Fn<Args> { type Output; }
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trait Foo { fn foo(&self, bar: dyn Fn(u32) -> i32); }
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}
|
|
struct S;
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impl foo::Foo for S { $0 }"#,
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r#"
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mod foo {
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pub trait Fn<Args> { type Output; }
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trait Foo { fn foo(&self, bar: dyn Fn(u32) -> i32); }
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}
|
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struct S;
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impl foo::Foo for S {
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fn foo(&self, bar: dyn Fn(u32) -> i32) {
|
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${0:todo!()}
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}
|
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}"#,
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);
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}
|
|
|
|
#[test]
|
|
fn test_empty_trait() {
|
|
check_assist_not_applicable(
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add_missing_impl_members,
|
|
r#"
|
|
trait Foo;
|
|
struct S;
|
|
impl Foo for S { $0 }"#,
|
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)
|
|
}
|
|
|
|
#[test]
|
|
fn test_ignore_unnamed_trait_members_and_default_methods() {
|
|
check_assist_not_applicable(
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add_missing_impl_members,
|
|
r#"
|
|
trait Foo {
|
|
fn (arg: u32);
|
|
fn valid(some: u32) -> bool { false }
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|
}
|
|
struct S;
|
|
impl Foo for S { $0 }"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn test_with_docstring_and_attrs() {
|
|
check_assist(
|
|
add_missing_impl_members,
|
|
r#"
|
|
#[doc(alias = "test alias")]
|
|
trait Foo {
|
|
/// doc string
|
|
type Output;
|
|
|
|
#[must_use]
|
|
fn foo(&self);
|
|
}
|
|
struct S;
|
|
impl Foo for S {}$0"#,
|
|
r#"
|
|
#[doc(alias = "test alias")]
|
|
trait Foo {
|
|
/// doc string
|
|
type Output;
|
|
|
|
#[must_use]
|
|
fn foo(&self);
|
|
}
|
|
struct S;
|
|
impl Foo for S {
|
|
$0type Output;
|
|
|
|
fn foo(&self) {
|
|
todo!()
|
|
}
|
|
}"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn test_default_methods() {
|
|
check_assist(
|
|
add_missing_default_members,
|
|
r#"
|
|
trait Foo {
|
|
type Output;
|
|
|
|
const CONST: usize = 42;
|
|
|
|
fn valid(some: u32) -> bool { false }
|
|
fn foo(some: u32) -> bool;
|
|
}
|
|
struct S;
|
|
impl Foo for S { $0 }"#,
|
|
r#"
|
|
trait Foo {
|
|
type Output;
|
|
|
|
const CONST: usize = 42;
|
|
|
|
fn valid(some: u32) -> bool { false }
|
|
fn foo(some: u32) -> bool;
|
|
}
|
|
struct S;
|
|
impl Foo for S {
|
|
$0fn valid(some: u32) -> bool { false }
|
|
}"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn test_generic_single_default_parameter() {
|
|
check_assist(
|
|
add_missing_impl_members,
|
|
r#"
|
|
trait Foo<T = Self> {
|
|
fn bar(&self, other: &T);
|
|
}
|
|
|
|
struct S;
|
|
impl Foo for S { $0 }"#,
|
|
r#"
|
|
trait Foo<T = Self> {
|
|
fn bar(&self, other: &T);
|
|
}
|
|
|
|
struct S;
|
|
impl Foo for S {
|
|
fn bar(&self, other: &Self) {
|
|
${0:todo!()}
|
|
}
|
|
}"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn test_generic_default_parameter_is_second() {
|
|
check_assist(
|
|
add_missing_impl_members,
|
|
r#"
|
|
trait Foo<T1, T2 = Self> {
|
|
fn bar(&self, this: &T1, that: &T2);
|
|
}
|
|
|
|
struct S<T>;
|
|
impl Foo<T> for S<T> { $0 }"#,
|
|
r#"
|
|
trait Foo<T1, T2 = Self> {
|
|
fn bar(&self, this: &T1, that: &T2);
|
|
}
|
|
|
|
struct S<T>;
|
|
impl Foo<T> for S<T> {
|
|
fn bar(&self, this: &T, that: &Self) {
|
|
${0:todo!()}
|
|
}
|
|
}"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn test_assoc_type_bounds_are_removed() {
|
|
check_assist(
|
|
add_missing_impl_members,
|
|
r#"
|
|
trait Tr {
|
|
type Ty: Copy + 'static;
|
|
}
|
|
|
|
impl Tr for ()$0 {
|
|
}"#,
|
|
r#"
|
|
trait Tr {
|
|
type Ty: Copy + 'static;
|
|
}
|
|
|
|
impl Tr for () {
|
|
$0type Ty;
|
|
}"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn test_whitespace_fixup_preserves_bad_tokens() {
|
|
check_assist(
|
|
add_missing_impl_members,
|
|
r#"
|
|
trait Tr {
|
|
fn foo();
|
|
}
|
|
|
|
impl Tr for ()$0 {
|
|
+++
|
|
}"#,
|
|
r#"
|
|
trait Tr {
|
|
fn foo();
|
|
}
|
|
|
|
impl Tr for () {
|
|
fn foo() {
|
|
${0:todo!()}
|
|
}
|
|
+++
|
|
}"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn test_whitespace_fixup_preserves_comments() {
|
|
check_assist(
|
|
add_missing_impl_members,
|
|
r#"
|
|
trait Tr {
|
|
fn foo();
|
|
}
|
|
|
|
impl Tr for ()$0 {
|
|
// very important
|
|
}"#,
|
|
r#"
|
|
trait Tr {
|
|
fn foo();
|
|
}
|
|
|
|
impl Tr for () {
|
|
fn foo() {
|
|
${0:todo!()}
|
|
}
|
|
// very important
|
|
}"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn weird_path() {
|
|
check_assist(
|
|
add_missing_impl_members,
|
|
r#"
|
|
trait Test {
|
|
fn foo(&self, x: crate)
|
|
}
|
|
impl Test for () {
|
|
$0
|
|
}
|
|
"#,
|
|
r#"
|
|
trait Test {
|
|
fn foo(&self, x: crate)
|
|
}
|
|
impl Test for () {
|
|
fn foo(&self, x: crate) {
|
|
${0:todo!()}
|
|
}
|
|
}
|
|
"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn missing_generic_type() {
|
|
check_assist(
|
|
add_missing_impl_members,
|
|
r#"
|
|
trait Foo<BAR> {
|
|
fn foo(&self, bar: BAR);
|
|
}
|
|
impl Foo for () {
|
|
$0
|
|
}
|
|
"#,
|
|
r#"
|
|
trait Foo<BAR> {
|
|
fn foo(&self, bar: BAR);
|
|
}
|
|
impl Foo for () {
|
|
fn foo(&self, bar: BAR) {
|
|
${0:todo!()}
|
|
}
|
|
}
|
|
"#,
|
|
)
|
|
}
|
|
|
|
#[test]
|
|
fn does_not_requalify_self_as_crate() {
|
|
check_assist(
|
|
add_missing_default_members,
|
|
r"
|
|
struct Wrapper<T>(T);
|
|
|
|
trait T {
|
|
fn f(self) -> Wrapper<Self> {
|
|
Wrapper(self)
|
|
}
|
|
}
|
|
|
|
impl T for () {
|
|
$0
|
|
}
|
|
",
|
|
r"
|
|
struct Wrapper<T>(T);
|
|
|
|
trait T {
|
|
fn f(self) -> Wrapper<Self> {
|
|
Wrapper(self)
|
|
}
|
|
}
|
|
|
|
impl T for () {
|
|
$0fn f(self) -> Wrapper<Self> {
|
|
Wrapper(self)
|
|
}
|
|
}
|
|
",
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_default_body_generation() {
|
|
check_assist(
|
|
add_missing_impl_members,
|
|
r#"
|
|
//- minicore: default
|
|
struct Foo(usize);
|
|
|
|
impl Default for Foo {
|
|
$0
|
|
}
|
|
"#,
|
|
r#"
|
|
struct Foo(usize);
|
|
|
|
impl Default for Foo {
|
|
$0fn default() -> Self {
|
|
Self(Default::default())
|
|
}
|
|
}
|
|
"#,
|
|
)
|
|
}
|
|
}
|