11791: fix: some fixes and improvements to signature help r=jonas-schievink a=jonas-schievink
bors r+
Co-authored-by: Jonas Schievink <jonas.schievink@ferrous-systems.com>
- use original instead of adjusted type in ide_completion::completions::record::complete_record
- don't even bother checking if we can complete union literals to Default or to struct update syntax
11686: feat: Enum variant field completion, enum variant / struct consistency r=Veykril a=m0rg-dev
This addresses several related inconsistencies:
- tuple structs use tab stops instead of placeholders
- tuple structs display in the completion menu as `Struct {…}` instead of `Struct(…)`
- enum variants don't receive field completions at all
- enum variants display differently from structs in the completion menu
Also, structs now display their type in the completion detail rather than the raw snippet text to be inserted.
As far as what's user-visible, that looks like this:
| | Menu | Completion | Detail |
|-|-|-|-|
| Record struct (old) | `Struct {…}` | `Struct { x: ${1:()}, y: ${2:()} }$0` | `Struct { x: ${1:()}, y: ${2:()} }$0` |
| Record struct (new) | `Struct {…}` | `Struct { x: ${1:()}, y: ${2:()} }$0` | `Struct { x: i32, y: i32 }` |
| Tuple struct (old) | `Struct {…}` | `Struct($1, $2)$0` | `Struct($1, $2)` |
| Tuple struct (new) | `Struct(…)` | `Struct(${1:()}, ${2:()})$0` | `Struct(i32, i32)` |
| Unit variant (old) | `Variant` | `Variant` | `()` |
| Unit variant (new) | `Variant` | `Variant$0` | `Variant` |
| Record variant (old) | `Variant` | `Variant` | `{x: i32, y: i32}` |
| Record variant (new) | `Variant {…}` | `Variant { x: ${1:()}, y: ${2:()} }$0` | `Variant { x: i32, y: i32 }` |
| Tuple variant (old) | `Variant(…)` | `Variant($0)` | `(i32, i32)` |
| Tuple variant (new) | `Variant(…)` | `Variant(${1:()}, ${2:()})$0` | `Variant(i32, i32)` |
Additionally, tuple variants no longer set `triggers_call_info` because it conflicts with placeholder generation, and tuple variants that require a qualified path should now use the qualified path.
Internally, this also lets us break the general "format an item with fields on it" code out into a shared module, so that means it'll be a lot easier to implement features like #11568.
Co-authored-by: Morgan Thomas <corp@m0rg.dev>
In particular:
- unit variants now display in the menu as "Variant", complete to "Variant", and display a detail of "Variant" (was "()")
- tuple variants now display in the menu as "Variant(…)", complete to "Variant(${1:()})$0" (was "Variant($0)"), and display a detail of "Variant(type)" (was "(type)")
- record variants now display in the menu as "Variant {…}", complete to "Variant { x: ${1:()} }$0" (was "Variant"), and display a detail of "Variant { x: type }" (was "{x: type}")
This behavior is identical to that of struct completions. In addition, tuple variants no longer set triggers_call_info, as to my understanding it's unnecessary now that we're emitting placeholders.
Tests have been updated to match, and the render::enum_variant::tests::inserts_parens_for_tuple_enums test has been removed entirely as it's covered by other tests (render::enum_detail_includes_{record, tuple}_fields, render::enum_detail_just_name_for_unit, render::pattern::enum_qualified).
- Add support for placeholder completions in tuple structs
- Denote tuple struct completions with `(…)` instead of ` {…}`
- Show struct completions as their type (`Struct { field: Type }`) in the completion menu instead of raw snippet text (`Struct { field: ${1:()} }$0`)
- don't return the receiver type from method resolution; instead just
return the autorefs/autoderefs that happened and repeat them. This
ensures all the effects like trait obligations and whatever we learned
about type variables from derefing them are actually applied. Also, it
allows us to get rid of `decanonicalize_ty`, which was just wrong in
principle.
- Autoderef itself now directly works with an inference table. Sadly
this has the effect of making it harder to use as an iterator, often
requiring manual `while let` loops. (rustc works around this by using
inner mutability in the inference context, so that things like unifying
types don't require a unique reference.)
- We now record the adjustments (autoref/deref) for method receivers
and index expressions, which we didn't before.
- Removed the redundant crate parameter from method resolution, since
the trait_env contains the crate as well.
- in the HIR API, the methods now take a scope to determine the trait env.
`Type` carries a trait env, but I think that's probably a bad decision
because it's easy to create it with the wrong env, e.g. by using
`Adt::ty`. This mostly didn't matter so far because
`iterate_method_candidates` took a crate parameter and ignored
`self.krate`, but the trait env would still have been wrong in those
cases, which I think would give some wrong results in some edge cases.
Fixes#10058.
