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Auto merge of #14905 - Veykril:hover-hex, r=Veykril

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feat: Render niches on hover
This commit is contained in:
bors 2023-05-30 12:19:51 +00:00
commit be446c6fd7
3 changed files with 71 additions and 41 deletions
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59
crates/hir/src/lib.rs
View File

@ -62,7 +62,7 @@
consteval::{try_const_usize, unknown_const_as_generic, ConstEvalError, ConstExt},
diagnostics::BodyValidationDiagnostic,
display::HexifiedConst,
layout::{Layout, LayoutError, RustcEnumVariantIdx, TagEncoding},
layout::{Layout as TyLayout, LayoutError, RustcEnumVariantIdx, TagEncoding},
method_resolution::{self, TyFingerprint},
mir::{self, interpret_mir},
primitive::UintTy,
@ -961,8 +961,8 @@ pub fn ty(&self, db: &dyn HirDatabase) -> Type {
Type::new(db, var_id, ty)
}
pub fn layout(&self, db: &dyn HirDatabase) -> Result<Arc<Layout>, LayoutError> {
db.layout_of_ty(self.ty(db).ty.clone(), self.parent.module(db).krate().into())
pub fn layout(&self, db: &dyn HirDatabase) -> Result<Layout, LayoutError> {
db.layout_of_ty(self.ty(db).ty.clone(), self.parent.module(db).krate().into()).map(Layout)
}
pub fn parent_def(&self, _db: &dyn HirDatabase) -> VariantDef {
@ -1135,10 +1135,10 @@ pub fn is_data_carrying(self, db: &dyn HirDatabase) -> bool {
self.variants(db).iter().any(|v| !matches!(v.kind(db), StructKind::Unit))
}
pub fn layout(self, db: &dyn HirDatabase) -> Result<(Arc<Layout>, usize), LayoutError> {
pub fn layout(self, db: &dyn HirDatabase) -> Result<(Layout, usize), LayoutError> {
let layout = Adt::from(self).layout(db)?;
let tag_size =
if let layout::Variants::Multiple { tag, tag_encoding, .. } = &layout.variants {
if let layout::Variants::Multiple { tag, tag_encoding, .. } = &layout.0.variants {
match tag_encoding {
TagEncoding::Direct => {
let target_data_layout = db
@ -1219,11 +1219,11 @@ pub fn layout(&self, db: &dyn HirDatabase) -> Result<(Layout, usize), LayoutErro
let parent_enum = self.parent_enum(db);
let (parent_layout, tag_size) = parent_enum.layout(db)?;
Ok((
match &parent_layout.variants {
match &parent_layout.0.variants {
layout::Variants::Multiple { variants, .. } => {
variants[RustcEnumVariantIdx(self.id)].clone()
Layout(Arc::new(variants[RustcEnumVariantIdx(self.id)].clone()))
}
_ => (*parent_layout).clone(),
_ => parent_layout,
},
tag_size,
))
@ -1255,11 +1255,11 @@ pub fn has_non_default_type_params(self, db: &dyn HirDatabase) -> bool {
})
}
pub fn layout(self, db: &dyn HirDatabase) -> Result<Arc<Layout>, LayoutError> {
pub fn layout(self, db: &dyn HirDatabase) -> Result<Layout, LayoutError> {
if db.generic_params(self.into()).iter().count() != 0 {
return Err(LayoutError::HasPlaceholder);
}
db.layout_of_adt(self.into(), Substitution::empty(Interner), self.krate(db).id)
db.layout_of_adt(self.into(), Substitution::empty(Interner), self.krate(db).id).map(Layout)
}
/// Turns this ADT into a type. Any type parameters of the ADT will be
@ -4243,8 +4243,8 @@ pub fn generic_params(&self, db: &dyn HirDatabase) -> FxHashSet<GenericParam> {
.collect()
}
pub fn layout(&self, db: &dyn HirDatabase) -> Result<Arc<Layout>, LayoutError> {
db.layout_of_ty(self.ty.clone(), self.env.krate)
pub fn layout(&self, db: &dyn HirDatabase) -> Result<Layout, LayoutError> {
db.layout_of_ty(self.ty.clone(), self.env.krate).map(Layout)
}
}
@ -4355,6 +4355,35 @@ fn closure_source(db: &dyn HirDatabase, closure: ClosureId) -> Option<ast::Closu
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct Layout(Arc<TyLayout>);
impl Layout {
pub fn size(&self) -> u64 {
self.0.size.bytes()
}
pub fn align(&self) -> u64 {
self.0.align.abi.bytes()
}
pub fn niches(&self, db: &dyn HirDatabase, krate: Crate) -> Option<u128> {
Some(self.0.largest_niche?.available(&*db.target_data_layout(krate.id)?))
}
pub fn field_offset(&self, idx: usize) -> Option<u64> {
match self.0.fields {
layout::FieldsShape::Primitive => None,
layout::FieldsShape::Union(_) => Some(0),
layout::FieldsShape::Array { stride, count } => {
let i = u64::try_from(idx).ok()?;
(i < count).then_some((stride * i).bytes())
}
layout::FieldsShape::Arbitrary { ref offsets, .. } => Some(offsets.get(idx)?.bytes()),
}
}
}
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
pub enum BindingMode {
Move,
@ -4506,6 +4535,12 @@ fn krate(&self, db: &dyn HirDatabase) -> Crate {
}
}
impl HasCrate for Enum {
fn krate(&self, db: &dyn HirDatabase) -> Crate {
self.module(db).krate()
}
}
impl HasCrate for Field {
fn krate(&self, db: &dyn HirDatabase) -> Crate {
self.parent_def(db).module(db).krate()

47
crates/ide/src/hover/render.rs
View File

@ -3,8 +3,8 @@
use either::Either;
use hir::{
Adt, AsAssocItem, AttributeTemplate, CaptureKind, HasAttrs, HasSource, HirDisplay, Semantics,
TypeInfo,
Adt, AsAssocItem, AttributeTemplate, CaptureKind, HasAttrs, HasCrate, HasSource, HirDisplay,
Layout, Semantics, TypeInfo,
};
use ide_db::{
base_db::SourceDatabase,
@ -401,13 +401,14 @@ pub(super) fn definition(
hir::VariantDef::Struct(s) => Adt::from(s)
.layout(db)
.ok()
.map(|layout| format!(", offset = {:#X}", layout.fields.offset(id).bytes())),
.and_then(|layout| Some(format!(", offset = {:#X}", layout.field_offset(id)?))),
_ => None,
};
let niches = niches(db, it, &layout).unwrap_or_default();
Some(format!(
"size = {:#X}, align = {:#X}{}",
layout.size.bytes(),
layout.align.abi.bytes(),
"size = {:#X}, align = {:#X}{}{niches}",
layout.size(),
layout.align(),
offset.as_deref().unwrap_or_default()
))
}),
@ -415,11 +416,8 @@ pub(super) fn definition(
Definition::Function(it) => label_and_docs(db, it),
Definition::Adt(it) => label_and_layout_info_and_docs(db, it, config, |&it| {
let layout = it.layout(db).ok()?;
Some(format!(
"size = {:#X}, align = {:#X}",
layout.size.bytes(),
layout.align.abi.bytes()
))
let niches = niches(db, it, &layout).unwrap_or_default();
Some(format!("size = {:#X}, align = {:#X}{niches}", layout.size(), layout.align()))
}),
Definition::Variant(it) => label_value_and_layout_info_and_docs(
db,
@ -437,14 +435,15 @@ pub(super) fn definition(
None
}
},
|it| {
|&it| {
let (layout, tag_size) = it.layout(db).ok()?;
let size = layout.size.bytes_usize() - tag_size;
let size = layout.size() as usize - tag_size;
if size == 0 {
// There is no value in showing layout info for fieldless variants
return None;
}
Some(format!("size = {:#X}", layout.size.bytes()))
let niches = niches(db, it, &layout).unwrap_or_default();
Some(format!("size = {:#X}{niches}", layout.size()))
},
),
Definition::Const(it) => label_value_and_docs(db, it, |it| {
@ -473,11 +472,8 @@ pub(super) fn definition(
Definition::TraitAlias(it) => label_and_docs(db, it),
Definition::TypeAlias(it) => label_and_layout_info_and_docs(db, it, config, |&it| {
let layout = it.ty(db).layout(db).ok()?;
Some(format!(
"size = {:#X}, align = {:#X}",
layout.size.bytes(),
layout.align.abi.bytes()
))
let niches = niches(db, it, &layout).unwrap_or_default();
Some(format!("size = {:#X}, align = {:#X}{niches}", layout.size(), layout.align(),))
}),
Definition::BuiltinType(it) => {
return famous_defs
@ -513,6 +509,10 @@ pub(super) fn definition(
markup(docs, label, mod_path)
}
fn niches(db: &RootDatabase, it: impl HasCrate, layout: &Layout) -> Option<String> {
Some(format!(", niches = {}", layout.niches(db, it.krate(db).into())?))
}
fn type_info(
sema: &Semantics<'_, RootDatabase>,
config: &HoverConfig,
@ -560,7 +560,7 @@ fn closure_ty(
let layout = if config.memory_layout {
original
.layout(sema.db)
.map(|x| format!(" // size = {}, align = {}", x.size.bytes(), x.align.abi.bytes()))
.map(|x| format!(" // size = {}, align = {}", x.size(), x.align()))
.unwrap_or_default()
} else {
String::default()
@ -771,12 +771,7 @@ fn local(db: &RootDatabase, it: hir::Local, config: &HoverConfig) -> Option<Mark
};
if config.memory_layout {
if let Ok(layout) = it.ty(db).layout(db) {
format_to!(
desc,
" // size = {}, align = {}",
layout.size.bytes(),
layout.align.abi.bytes()
);
format_to!(desc, " // size = {}, align = {}", layout.size(), layout.align());
}
}
markup(None, desc, None)

6
crates/ide/src/hover/tests.rs
View File

@ -1528,7 +1528,7 @@ fn test_hover_function_pointer_show_identifiers() {
```
```rust
type foo = fn(a: i32, b: i32) -> i32 // size = 0x8, align = 0x8
type foo = fn(a: i32, b: i32) -> i32 // size = 0x8, align = 0x8, niches = 1
```
"#]],
);
@ -1546,7 +1546,7 @@ fn test_hover_function_pointer_no_identifier() {
```
```rust
type foo = fn(i32, i32) -> i32 // size = 0x8, align = 0x8
type foo = fn(i32, i32) -> i32 // size = 0x8, align = 0x8, niches = 1
```
"#]],
);
@ -1904,7 +1904,7 @@ fn test_hover_layout_of_enum() {
```
```rust
enum Foo // size = 0x10, align = 0x8
enum Foo // size = 0x10, align = 0x8, niches = 254
```
"#]],
);