use std::{fmt::Write, iter, mem};

use chalk_ir::{BoundVar, ConstData, DebruijnIndex, TyKind};

use hir_def::{

hir::{

ArithOp, Array, BinaryOp, BindingAnnotation, BindingId, ExprId, LabelId, Literal, MatchArm,

Pat, PatId, RecordFieldPat, RecordLitField,

},

lang_item::{LangItem, LangItemTarget},

resolver::{HasResolver, ResolveValueResult, Resolver, ValueNs},

};

use hir_expand::name::Name;

use la_arena::ArenaMap;

use triomphe::Arc;

use crate::{

consteval::ConstEvalError,

error_lifetime,

generics::generics,

inhabitedness::is_ty_uninhabited_from,

layout::LayoutError,

mapping::ToChalk,

mir::{

},

static_lifetime,

traits::FnTrait,

utils::ClosureSubst,

};

mod as_place;

writeln!(

f,

"Missing function definition for {}",

)?;

}

MirLowerError::HasErrors => writeln!(f, "Type inference result contains errors")?,

writeln!(

f,

"Generic arg not provided for {}",

)?;

writeln!(f, "Provided args: [")?;

for g in subst.iter(Interner) {

db: &dyn HirDatabase,

p: &Path,

display_target: DisplayTarget,

) -> Self {

Self::UnresolvedName(

)

}

}

owner,

closures: vec![],

};

MirLowerCtx {

result: mir,

}

Expr::Missing => {

if let DefWithBodyId::FunctionId(f) = self.owner {

if let ItemContainerId::TraitId(t) = assoc.container {

return Err(MirLowerError::TraitFunctionDefinition(t, name.clone()));

}

}

Err(MirLowerError::IncompleteExpr)

}

Expr::Path(p) => {

}

}

match pr {

ValueNs::LocalBinding(_) | ValueNs::StaticId(_) => {

let Some((temp, current)) =

Ok(Some(current))

}

ValueNs::EnumVariantId(variant_id) => {

let ty = self.infer.type_of_expr[expr_id].clone();

current = self.lower_enum_variant(

variant_id,

Ok(Some(current))

}

ValueNs::GenericParam(p) => {

not_supported!("owner without generic def id");

};

let ty = self.expr_ty_without_adjust(expr_id);

self.push_assignment(

current,

ty,

value: chalk_ir::ConstValue::BoundVar(BoundVar::new(

DebruijnIndex::INNERMOST,

MirLowerError::TypeError(

"fail to lower const generic param",

),

};

self.push_fake_read(current, cond_place, expr_id.into());

let resolver_guard =

let (then_target, else_target) =

self.pattern_match(current, None, cond_place, *pat)?;

self.resolver.reset_to_guard(resolver_guard);

let (func_id, generic_args) =

self.infer.method_resolution(expr_id).ok_or_else(|| {

MirLowerError::UnresolvedMethod(

)

})?;

let func = Operand::from_fn(self.db, func_id, generic_args);

self.push_fake_read(current, cond_place, expr_id.into());

let mut end = None;

let resolver_guard =

for MatchArm { pat, guard, expr } in arms.iter() {

let (then, mut otherwise) =

self.pattern_match(current, None, cond_place, *pat)?;

let variant_id =

self.infer.variant_resolution_for_expr(expr_id).ok_or_else(|| match path {

Some(p) => MirLowerError::UnresolvedName(

.display(self.db, self.display_target())

.to_string(),

),

TyKind::Adt(_, s) => s.clone(),

_ => not_supported!("Non ADT record literal"),

};

match variant_id {

VariantId::EnumVariantId(_) | VariantId::StructId(_) => {

for RecordLitField { name, expr } in fields.iter() {

let field_id =

let Some((op, c)) = self.lower_expr_to_some_operand(*expr, current)?

else {

return Ok(None);

not_supported!("Union record literal with more than one field");

};

let local_id =

let place = place.project(

PlaceElem::Field(Either::Left(FieldId {

parent: union_id.into(),

Expr::Await { .. } => not_supported!("await"),

Expr::Yeet { .. } => not_supported!("yeet"),

Expr::Async { .. } => not_supported!("async block"),

}

Expr::Cast { expr, type_ref: _ } => {

let Some((it, current)) = self.lower_expr_to_some_operand(*expr, current)? else {

};

self.push_fake_read(current, value, expr_id.into());

let resolver_guard =

current = self.pattern_match_assignment(current, value, target)?;

self.resolver.reset_to_guard(resolver_guard);

Ok(Some(current))

Rvalue::Aggregate(

AggregateKind::Adt(st.into(), subst.clone()),

self.db

.fields()

.iter()

.map(|it| {

_ => {

return Err(MirLowerError::TypeError(

"Array expression with non array type",

}

};

let Some(values) = elements

_ => {

return Err(MirLowerError::TypeError(

"Array repeat expression with non array type",

}

};

let r = Rvalue::Repeat(init, len);

}

fn placeholder_subst(&mut self) -> Substitution {

Some(it) => TyBuilder::placeholder_subst(self.db, it),

None => Substitution::empty(Interner),

}

MirLowerError::unresolved_path(

self.db,

c,

)

};

let pr = self

.resolver

.ok_or_else(unresolved_name)?;

match pr {

ResolveValueResult::ValueNs(v, _) => {

_ => {

return Err(MirLowerError::TypeError(

"float with size other than 2, 4, 8 or 16 bytes",

}

},

};

// We can't evaluate constant with substitution now, as generics are not monomorphized in lowering.

intern_const_scalar(ConstScalar::UnevaluatedConst(const_id, subst), ty)

} else {

self.db

.const_eval(const_id, subst, None)

.map_err(|e| MirLowerError::ConstEvalError(name.into(), Box::new(e)))?

f: impl FnOnce(&mut MirLowerCtx<'_>, BasicBlockId) -> Result<()>,

) -> Result<Option<BasicBlockId>> {

let begin = self.new_basic_block();

let prev_label = if let Some(label) = label {

// We should generate the end now, to make sure that it wouldn't change later. It is

// bad as we may emit end (unnecessary unreachable block) for unterminating loop, but

}

fn is_uninhabited(&self, expr_id: ExprId) -> bool {

}

/// This function push `StorageLive` statement for the binding, and applies changes to add `StorageDead` and

}

fn resolve_lang_item(&self, item: LangItem) -> Result<LangItemTarget> {

self.db.lang_item(crate_id, item).ok_or(MirLowerError::LangItemNotFound(item))

}

self.push_fake_read(current, init_place, span);

// Using the initializer for the resolver scope is good enough for us, as it cannot create new declarations

// and has all declarations of the `let`.

(current, else_block) =

self.pattern_match(current, None, init_place, *pat)?;

self.resolver.reset_to_guard(resolver_guard);

Ok(r) => Ok(r),

Err(e) => {

let edition = self.edition();

let loc = variant.lookup(db);

let enum_loc = loc.parent.lookup(db);

let name = format!(

"{}::{}",

);

Err(MirLowerError::ConstEvalError(name.into(), Box::new(e)))

}

}

fn edition(&self) -> Edition {

}

}

fn display_target(&self) -> DisplayTarget {

pub fn mir_body_for_closure_query(

db: &dyn HirDatabase,

) -> Result<Arc<MirBody>> {

let body = db.body(owner);

let infer = db.infer(owner);

let Expr::Closure { args, body: root, .. } = &body[expr] else {

let TyKind::Closure(_, substs) = &infer[expr].kind(Interner) else {

implementation_error!("closure expression is not closure");

};

let mut ctx = MirLowerCtx::new(db, owner, &body, &infer);

// 0 is return local

ctx.result.locals.alloc(Local { ty: infer[*root].clone() });

let Some(sig) = ClosureSubst(substs).sig_ty().callable_sig(db) else {

implementation_error!("closure has not callable sig");

};

let current = ctx.lower_params_and_bindings(

args.iter().zip(sig.params().iter()).map(|(it, y)| (*it, y.clone())),

None,

}

pub fn mir_body_query(db: &dyn HirDatabase, def: DefWithBodyId) -> Result<Arc<MirBody>> {

let detail = match def {

DefWithBodyId::FunctionId(it) => {

}

DefWithBodyId::StaticId(it) => {

}

DefWithBodyId::ConstId(it) => db

.name

.clone()

.unwrap_or_else(Name::missing)

.to_string(),

DefWithBodyId::VariantId(it) => {

}

};

let _p = tracing::info_span!("mir_body_query", ?detail).entered();

let body = db.body(def);

Ok(Arc::new(result))

}

_db: &dyn HirDatabase,

) -> Result<Arc<MirBody>> {

Err(MirLowerError::Loop)

}

ctx.result.locals.alloc(Local { ty: ctx.expr_ty_after_adjustments(root_expr) });

let binding_picker = |b: BindingId| {

let owner = ctx.body.binding_owners.get(&b).copied();

};

// 1 to param_len is for params

// FIXME: replace with let chain once it becomes stable