Float,

};

use smallvec::SmallVec;

use triomphe::Arc;

use crate::{

/// Returns a `Display`able type that is human-readable.

/// Use this for showing types to the user (e.g. diagnostics)

where

Self: Sized,

{

limited_size: None,

omit_verbose_types: false,

closure_style: ClosureStyle::ImplFn,

show_container_bounds: false,

}

}

&'a self,

db: &'a dyn HirDatabase,

max_size: Option<usize>,

) -> HirDisplayWrapper<'a, Self>

where

Self: Sized,

limited_size: None,

omit_verbose_types: true,

closure_style: ClosureStyle::ImplFn,

show_container_bounds: false,

}

}

&'a self,

db: &'a dyn HirDatabase,

limited_size: Option<usize>,

) -> HirDisplayWrapper<'a, Self>

where

Self: Sized,

limited_size,

omit_verbose_types: true,

closure_style: ClosureStyle::ImplFn,

show_container_bounds: false,

}

}

&'a self,

db: &'a dyn HirDatabase,

show_container_bounds: bool,

) -> HirDisplayWrapper<'a, Self>

where

Self: Sized,

limited_size: None,

omit_verbose_types: false,

closure_style: ClosureStyle::ImplFn,

show_container_bounds,

}

}

}

impl HirFormatter<'_> {

pub fn write_joined<T: HirDisplay>(

&mut self,

iter: impl IntoIterator<Item = T>,

/// Display types for inlays, doc popups, autocompletion, etc...

/// Showing `{unknown}` or not qualifying paths is fine here.

/// There's no reason for this to fail.

/// Display types for inserting them in source files.

/// The generated code should compile, so paths need to be qualified.

SourceCode { module_id: ModuleId, allow_opaque: bool },

">::{}",

f.db.type_alias_data(from_assoc_type_id(self.associated_ty_id))

.name

)?;

let proj_params_count =

self.substitution.len(Interner) - trait_ref.substitution.len(Interner);

let id = from_placeholder_idx(f.db, *idx);

let generics = generics(f.db.upcast(), id.parent);

let param_data = &generics[id.local_id];

Ok(())

}

ConstValue::Concrete(c) => match &c.interned {

TyKind::Adt(adt, _) if b.len() == 2 * size_of::<usize>() => match adt.0 {

hir_def::AdtId::StructId(s) => {

let data = f.db.struct_data(s);

Ok(())

}

_ => f.write_str("<unsized-enum-or-union>"),

match adt.0 {

hir_def::AdtId::StructId(s) => {

let data = f.db.struct_data(s);

let field_types = f.db.field_types(s.into());

render_variant_after_name(

&data.variant_data,

)

}

hir_def::AdtId::UnionId(u) => {

}

hir_def::AdtId::EnumId(e) => {

let Ok(target_data_layout) = f.db.target_data_layout(trait_env.krate) else {

return f.write_str("<failed-to-detect-variant>");

};

let data = f.db.enum_variant_data(var_id);

let field_types = f.db.field_types(var_id.into());

render_variant_after_name(

&data.variant_data,

if matches!(data, VariantData::Record(_)) {

write!(f, " {{")?;

if let Some((id, data)) = it.next() {

render_field(f, id)?;

}

for (id, data) in it {

render_field(f, id)?;

}

write!(f, " }}")?;

CallableDefId::FunctionId(ff) => {

write!(f, "fn ")?;

f.start_location_link(def.into());

}

CallableDefId::StructId(s) => {

f.start_location_link(def.into());

}

CallableDefId::EnumVariantId(e) => {

f.start_location_link(def.into());

}

};

f.end_location_link();

let (parent_len, self_param, type_, const_, impl_, lifetime) =

generics.provenance_split();

let parameters = parameters.as_slice(Interner);

// We print all params except implicit impl Trait params. Still a bit weird; should we leave out parent and self?

if parameters.len() - impl_ > 0 {

// `parameters` are in the order of fn's params (including impl traits), fn's lifetimes

let without_impl = self_param as usize + type_ + const_ + lifetime;

// parent's params (those from enclosing impl or trait, if any).

let (fn_params, parent_params) = parameters.split_at(without_impl + impl_);

write!(f, "<")?;

hir_fmt_generic_arguments(f, parent_params, None)?;

if !parent_params.is_empty() && !fn_params.is_empty() {

write!(f, ", ")?;

}

write!(f, ">")?;

}

}

TyKind::Adt(AdtId(def_id), parameters) => {

f.start_location_link((*def_id).into());

match f.display_target {

let name = match *def_id {

hir_def::AdtId::StructId(it) => db.struct_data(it).name.clone(),

hir_def::AdtId::UnionId(it) => db.union_data(it).name.clone(),

hir_def::AdtId::EnumId(it) => db.enum_data(it).name.clone(),

};

}

DisplayTarget::SourceCode { module_id, allow_opaque: _ } => {

if let Some(path) = find_path::find_path(

prefer_absolute: false,

},

) {

} else {

return Err(HirDisplayError::DisplaySourceCodeError(

DisplaySourceCodeError::PathNotFound,

// Use placeholder associated types when the target is test (https://rust-lang.github.io/chalk/book/clauses/type_equality.html#placeholder-associated-types)

if f.display_target.is_test() {

f.start_location_link(trait_.into());

f.end_location_link();

write!(f, "::")?;

f.start_location_link(type_alias.into());

f.end_location_link();

// Note that the generic args for the associated type come before those for the

// trait (including the self type).

let alias = from_foreign_def_id(*type_alias);

let type_alias = db.type_alias_data(alias);

f.start_location_link(alias.into());

f.end_location_link();

}

TyKind::OpaqueType(opaque_ty_id, parameters) => {

write!(

f,

"{}",

)?

}

TypeParamProvenance::ArgumentImplTrait => {

}

},

TypeOrConstParamData::ConstParamData(p) => {

}

}

}

let parameters_to_write = generic_args_sans_defaults(f, generic_def, parameters);

write!(f, "<")?;

hir_fmt_generic_arguments(f, parameters_to_write, self_)?;

write!(f, ">")?;

}

// otherwise, if the arg is equal to the param default, hide it (unless the

// default is an error which can happen for the trait Self type)

};

let mut default_from = 0;

for (i, parameter) in parameters.iter().enumerate() {

None => (parameters, &[][..]),

};

for generic_arg in lifetimes.iter().chain(ty_or_const) {

if !mem::take(&mut first) {

write!(f, ", ")?;

}

// existential) here, which is the only thing that's

// possible in actual Rust, and hence don't print it

f.start_location_link(trait_.into());

f.end_location_link();

if is_fn_trait {

if let [self_, params @ ..] = trait_ref.substitution.as_slice(Interner) {

let assoc_ty_id = from_assoc_type_id(proj.associated_ty_id);

let type_alias = f.db.type_alias_data(assoc_ty_id);

f.start_location_link(assoc_ty_id.into());

f.end_location_link();

let proj_arg_count = generics(f.db.upcast(), assoc_ty_id.into()).len_self();

}

let trait_ = tr.hir_trait_id();

f.start_location_link(trait_.into());

f.end_location_link();

let substs = tr.substitution.as_slice(Interner);

hir_fmt_generics(f, &substs[1..], None, substs[0].ty(Interner))

write!(f, ">::",)?;

let type_alias = from_assoc_type_id(projection_ty.associated_ty_id);

f.start_location_link(type_alias.into());

f.end_location_link();

write!(f, " = ")?;

ty.hir_fmt(f)?;

let id = lt_from_placeholder_idx(f.db, *idx);

let generics = generics(f.db.upcast(), id.parent);

let param_data = &generics[id.local_id];

Ok(())

}

_ if f.display_target.is_source_code() => write!(f, "'_"),

LifetimeData::BoundVar(idx) => idx.hir_fmt(f),

LifetimeData::InferenceVar(_) => write!(f, "_"),

LifetimeData::Static => write!(f, "'static"),

LifetimeData::Erased => write!(f, "'<erased>"),

LifetimeData::Phantom(void, _) => match *void {},

}

wc.hir_fmt(f)?;

write!(f, ")")?;

}

}

Ok(())

}

};

write!(f, "&")?;

if let Some(lifetime) = lifetime {

}

write!(f, "{mutability}")?;

inner.hir_fmt(f)?;

TypeRef::Array(inner, len) => {

write!(f, "[")?;

inner.hir_fmt(f)?;

}

TypeRef::Slice(inner) => {

write!(f, "[")?;

for index in 0..function_parameters.len() {

let (param_name, param_type) = &function_parameters[index];

if let Some(name) = param_name {

}

param_type.hir_fmt(f)?;

}

path.hir_fmt(f)

}

TypeBound::ForLifetime(lifetimes, path) => {

write!(

f,

"for<{}> ",

)?;

path.hir_fmt(f)

}

if !matches!(self.kind(), PathKind::Plain) || seg_idx > 0 {

write!(f, "::")?;

}

if let Some(generic_args) = segment.args_and_bindings {

// We should be in type context, so format as `Foo<Bar>` instead of `Foo::<Bar>`.

// Do we actually format expressions?

} else {

write!(f, ", ")?;

}

match &binding.type_ref {

Some(ty) => {

write!(f, " = ")?;

fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError> {

match self {

hir_def::path::GenericArg::Type(ty) => ty.hir_fmt(f),

hir_def::path::GenericArg::Lifetime(lifetime) => {

}

}

}