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feat: preview adt field when hover #15847

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Merged
merged 1 commit into from
Nov 8, 2023
Merged

feat: preview adt field when hover #15847

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59 changes: 58 additions & 1 deletion crates/hir/src/display.rs
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Open in desktop
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
//! HirDisplay implementations for various hir types.
use hir_def::{
data::adt::VariantData,
data::adt::{StructKind, VariantData},
generics::{
TypeOrConstParamData, TypeParamProvenance, WherePredicate, WherePredicateTypeTarget,
},
Expand Down Expand Up @@ -163,7 +163,40 @@ impl HirDisplay for Struct {
write!(f, "{}", self.name(f.db).display(f.db.upcast()))?;
let def_id = GenericDefId::AdtId(AdtId::StructId(self.id));
write_generic_params(def_id, f)?;

let variant_data = self.variant_data(f.db);
if let StructKind::Tuple = variant_data.kind() {
f.write_char('(')?;
let mut it = variant_data.fields().iter().peekable();

while let Some((id, _)) = it.next() {
let field = Field { parent: (*self).into(), id };
field.ty(f.db).hir_fmt(f)?;
if it.peek().is_some() {
f.write_str(", ")?;
}
}

f.write_str(");")?;
}

write_where_clause(def_id, f)?;

if let StructKind::Record = variant_data.kind() {
let fields = self.fields(f.db);
if fields.is_empty() {
f.write_str(" {}")?;
} else {
f.write_str(" {\n")?;
for field in self.fields(f.db) {
f.write_str(" ")?;
field.hir_fmt(f)?;
f.write_str(",\n")?;
}
f.write_str("}")?;
}
}

Ok(())
}
}
Expand All @@ -176,6 +209,18 @@ impl HirDisplay for Enum {
let def_id = GenericDefId::AdtId(AdtId::EnumId(self.id));
write_generic_params(def_id, f)?;
write_where_clause(def_id, f)?;

let variants = self.variants(f.db);
if !variants.is_empty() {
f.write_str(" {\n")?;
for variant in variants {
f.write_str(" ")?;
variant.hir_fmt(f)?;
f.write_str(",\n")?;
}
f.write_str("}")?;
}

Ok(())
}
}
Expand All @@ -188,6 +233,18 @@ impl HirDisplay for Union {
let def_id = GenericDefId::AdtId(AdtId::UnionId(self.id));
write_generic_params(def_id, f)?;
write_where_clause(def_id, f)?;

let fields = self.fields(f.db);
if !fields.is_empty() {
f.write_str(" {\n")?;
for field in self.fields(f.db) {
f.write_str(" ")?;
field.hir_fmt(f)?;
f.write_str(",\n")?;
}
f.write_str("}")?;
}

Ok(())
}
}
Expand Down
61 changes: 36 additions & 25 deletions crates/ide/src/hover/tests.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1136,7 +1136,9 @@ impl Thing {
```

```rust
struct Thing
struct Thing {
x: u32,
}
```
"#]],
);
Expand All @@ -1155,7 +1157,9 @@ impl Thing {
```

```rust
struct Thing
struct Thing {
x: u32,
}
```
"#]],
);
Expand All @@ -1174,7 +1178,9 @@ impl Thing {
```

```rust
enum Thing
enum Thing {
A,
}
```
"#]],
);
Expand All @@ -1193,7 +1199,9 @@ impl Thing {
```

```rust
enum Thing
enum Thing {
A,
}
```
"#]],
);
Expand Down Expand Up @@ -2005,7 +2013,10 @@ fn test_hover_layout_of_enum() {
```

```rust
enum Foo // size = 16 (0x10), align = 8, niches = 254
enum Foo {
Variant1(u8, u16),
Variant2(i32, u8, i64),
} // size = 16 (0x10), align = 8, niches = 254
```
"#]],
);
Expand Down Expand Up @@ -2346,7 +2357,7 @@ fn main() { let s$0t = S{ f1:0 }; }
focus_range: 7..8,
name: "S",
kind: Struct,
description: "struct S",
description: "struct S {\n f1: u32,\n}",
},
},
],
Expand Down Expand Up @@ -2379,7 +2390,7 @@ fn main() { let s$0t = S{ f1:Arg(0) }; }
focus_range: 24..25,
name: "S",
kind: Struct,
description: "struct S<T>",
description: "struct S<T> {\n f1: T,\n}",
},
},
HoverGotoTypeData {
Expand All @@ -2392,7 +2403,7 @@ fn main() { let s$0t = S{ f1:Arg(0) }; }
focus_range: 7..10,
name: "Arg",
kind: Struct,
description: "struct Arg",
description: "struct Arg(u32);",
},
},
],
Expand Down Expand Up @@ -2438,7 +2449,7 @@ fn main() { let s$0t = S{ f1: S{ f1: Arg(0) } }; }
focus_range: 24..25,
name: "S",
kind: Struct,
description: "struct S<T>",
description: "struct S<T> {\n f1: T,\n}",
},
},
HoverGotoTypeData {
Expand All @@ -2451,7 +2462,7 @@ fn main() { let s$0t = S{ f1: S{ f1: Arg(0) } }; }
focus_range: 7..10,
name: "Arg",
kind: Struct,
description: "struct Arg",
description: "struct Arg(u32);",
},
},
],
Expand Down Expand Up @@ -2487,7 +2498,7 @@ fn main() { let s$0t = (A(1), B(2), M::C(3) ); }
focus_range: 7..8,
name: "A",
kind: Struct,
description: "struct A",
description: "struct A(u32);",
},
},
HoverGotoTypeData {
Expand All @@ -2500,7 +2511,7 @@ fn main() { let s$0t = (A(1), B(2), M::C(3) ); }
focus_range: 22..23,
name: "B",
kind: Struct,
description: "struct B",
description: "struct B(u32);",
},
},
HoverGotoTypeData {
Expand All @@ -2514,7 +2525,7 @@ fn main() { let s$0t = (A(1), B(2), M::C(3) ); }
name: "C",
kind: Struct,
container_name: "M",
description: "pub struct C",
description: "pub struct C(u32);",
},
},
],
Expand Down Expand Up @@ -2704,7 +2715,7 @@ fn main() { let s$0t = foo(); }
focus_range: 39..41,
name: "S1",
kind: Struct,
description: "struct S1",
description: "struct S1 {}",
},
},
HoverGotoTypeData {
Expand All @@ -2717,7 +2728,7 @@ fn main() { let s$0t = foo(); }
focus_range: 52..54,
name: "S2",
kind: Struct,
description: "struct S2",
description: "struct S2 {}",
},
},
],
Expand Down Expand Up @@ -2808,7 +2819,7 @@ fn foo(ar$0g: &impl Foo + Bar<S>) {}
focus_range: 36..37,
name: "S",
kind: Struct,
description: "struct S",
description: "struct S {}",
},
},
],
Expand Down Expand Up @@ -2908,7 +2919,7 @@ fn foo(ar$0g: &impl Foo<S>) {}
focus_range: 23..24,
name: "S",
kind: Struct,
description: "struct S",
description: "struct S {}",
},
},
],
Expand Down Expand Up @@ -2945,7 +2956,7 @@ fn main() { let s$0t = foo(); }
focus_range: 49..50,
name: "B",
kind: Struct,
description: "struct B<T>",
description: "struct B<T> {}",
},
},
HoverGotoTypeData {
Expand Down Expand Up @@ -3034,7 +3045,7 @@ fn foo(ar$0g: &dyn Foo<S>) {}
focus_range: 23..24,
name: "S",
kind: Struct,
description: "struct S",
description: "struct S {}",
},
},
],
Expand Down Expand Up @@ -3082,7 +3093,7 @@ fn foo(a$0rg: &impl ImplTrait<B<dyn DynTrait<B<S>>>>) {}
focus_range: 50..51,
name: "B",
kind: Struct,
description: "struct B<T>",
description: "struct B<T> {}",
},
},
HoverGotoTypeData {
Expand All @@ -3108,7 +3119,7 @@ fn foo(a$0rg: &impl ImplTrait<B<dyn DynTrait<B<S>>>>) {}
focus_range: 65..66,
name: "S",
kind: Struct,
description: "struct S",
description: "struct S {}",
},
},
],
Expand Down Expand Up @@ -3335,7 +3346,7 @@ struct S$0T<const C: usize = 1, T = Foo>(T);
```

```rust
struct ST<const C: usize = 1, T = Foo>
struct ST<const C: usize = 1, T = Foo>(T);
```
"#]],
);
Expand All @@ -3356,7 +3367,7 @@ struct S$0T<const C: usize = {40 + 2}, T = Foo>(T);
```

```rust
struct ST<const C: usize = {const}, T = Foo>
struct ST<const C: usize = {const}, T = Foo>(T);
```
"#]],
);
Expand All @@ -3378,7 +3389,7 @@ struct S$0T<const C: usize = VAL, T = Foo>(T);
```

```rust
struct ST<const C: usize = VAL, T = Foo>
struct ST<const C: usize = VAL, T = Foo>(T);
```
"#]],
);
Expand Down Expand Up @@ -5935,7 +5946,7 @@ pub struct Foo(i32);
```

```rust
pub struct Foo // size = 4, align = 4
pub struct Foo(i32); // size = 4, align = 4
```

---
Expand Down