use erg_common::astr::AtomicStr;
use erg_common::config::ErgConfig;
use erg_common::dict;
use erg_common::error::{Location, MultiErrorDisplay};
use erg_common::set;
use erg_common::set::Set;
use erg_common::traits::{Locational, Runnable, Stream};
use erg_common::vis::Visibility;
use erg_common::{enum_unwrap, fmt_option, fn_name, get_hash, log, switch_lang, Str};
use erg_parser::ast;
use erg_parser::ast::AST;
use erg_parser::build_ast::ASTBuilder;
use erg_parser::token::{Token, TokenKind};
use erg_parser::Parser;
use crate::ty::constructors::{
array_mut, array_t, free_var, func, mono, poly, proc, quant, set_mut, set_t, ty_tp,
};
use crate::ty::free::Constraint;
use crate::ty::typaram::TyParam;
use crate::ty::value::{GenTypeObj, TypeKind, TypeObj, ValueObj};
use crate::ty::{HasType, ParamTy, Type};
use crate::context::instantiate::TyVarInstContext;
use crate::context::{
ClassDefType, Context, ContextKind, OperationKind, RegistrationMode, TraitInstance,
};
use crate::error::{
CompileError, CompileErrors, LowerError, LowerErrors, LowerResult, LowerWarnings,
SingleLowerResult,
};
use crate::hir;
use crate::hir::HIR;
use crate::mod_cache::SharedModuleCache;
use crate::reorder::Reorderer;
use crate::varinfo::{Mutability, VarInfo, VarKind};
use Visibility::*;
#[derive(Debug)]
pub struct ASTLowerer {
cfg: ErgConfig,
pub(crate) ctx: Context,
errs: LowerErrors,
warns: LowerWarnings,
}
impl Default for ASTLowerer {
fn default() -> Self {
Self::new_with_cache(
ErgConfig::default(),
Str::ever("<module>"),
SharedModuleCache::new(),
SharedModuleCache::new(),
)
}
}
impl Runnable for ASTLowerer {
type Err = CompileError;
type Errs = CompileErrors;
const NAME: &'static str = "Erg lowerer";
#[inline]
fn cfg(&self) -> &ErgConfig {
&self.cfg
}
fn new(cfg: ErgConfig) -> Self {
Self::new_with_cache(
cfg,
Str::ever("<module>"),
SharedModuleCache::new(),
SharedModuleCache::new(),
)
}
#[inline]
fn finish(&mut self) {}
fn clear(&mut self) {
self.errs.clear();
self.warns.clear();
}
fn exec(&mut self) -> Result<i32, Self::Errs> {
let mut ast_builder = ASTBuilder::new(self.cfg.copy());
let ast = ast_builder.build(self.input().read())?;
let (hir, warns) = self.lower(ast, "exec").map_err(|(_, errs)| errs)?;
if self.cfg.verbose >= 2 {
warns.fmt_all_stderr();
}
println!("{hir}");
Ok(0)
}
fn eval(&mut self, src: String) -> Result<String, Self::Errs> {
let mut ast_builder = ASTBuilder::new(self.cfg.copy());
let ast = ast_builder.build(src)?;
let (hir, ..) = self.lower(ast, "eval").map_err(|(_, errs)| errs)?;
Ok(format!("{hir}"))
}
}
impl ASTLowerer {
pub fn new_with_cache<S: Into<Str>>(
cfg: ErgConfig,
mod_name: S,
mod_cache: SharedModuleCache,
py_mod_cache: SharedModuleCache,
) -> Self {
Self {
ctx: Context::new_module(mod_name, cfg.clone(), mod_cache, py_mod_cache),
cfg,
errs: LowerErrors::empty(),
warns: LowerWarnings::empty(),
}
}
fn return_t_check(
&self,
loc: Location,
name: &Str,
expect: &Type,
found: &Type,
) -> SingleLowerResult<()> {
self.ctx
.sub_unify(found, expect, loc, Some(name))
.map_err(|_| {
LowerError::type_mismatch_error(
self.cfg.input.clone(),
line!() as usize,
loc,
self.ctx.caused_by(),
name,
expect,
found,
self.ctx.get_candidates(found),
self.ctx.get_type_mismatch_hint(expect, found),
)
})
}
fn use_check(&self, expr: &hir::Expr, mode: &str) -> SingleLowerResult<()> {
if mode != "eval" && !expr.ref_t().is_nonelike() && !expr.is_type_asc() {
Err(LowerError::syntax_error(
self.cfg.input.clone(),
line!() as usize,
expr.loc(),
AtomicStr::arc(&self.ctx.name[..]),
switch_lang!(
"japanese" => format!("式の評価結果(: {})が使われていません", expr.ref_t()),
"simplified_chinese" => format!("表达式评估结果(: {})未使用", expr.ref_t()),
"traditional_chinese" => format!("表達式評估結果(: {})未使用", expr.ref_t()),
"english" => format!("the evaluation result of the expression (: {}) is not used", expr.ref_t()),
),
Some(
switch_lang!(
"japanese" => "値を使わない場合は、discard関数を使用してください",
"simplified_chinese" => "如果您不想使用该值，请使用discard函数",
"traditional_chinese" => "如果您不想使用該值，請使用discard函數",
"english" => "if you don't use the value, use discard function",
)
.into(),
),
))
} else {
Ok(())
}
}
fn pop_append_errs(&mut self) {
if let Err(mut errs) = self.ctx.check_decls_and_pop() {
self.errs.append(&mut errs);
}
}
fn lower_literal(&self, lit: ast::Literal) -> LowerResult<hir::Literal> {
let loc = lit.loc();
let lit = hir::Literal::try_from(lit.token).map_err(|_| {
LowerError::invalid_literal(
self.cfg.input.clone(),
line!() as usize,
loc,
self.ctx.caused_by(),
)
})?;
Ok(lit)
}
fn lower_array(&mut self, array: ast::Array) -> LowerResult<hir::Array> {
log!(info "entered {}({array})", fn_name!());
match array {
ast::Array::Normal(arr) => Ok(hir::Array::Normal(self.lower_normal_array(arr)?)),
ast::Array::WithLength(arr) => {
Ok(hir::Array::WithLength(self.lower_array_with_length(arr)?))
}
other => todo!("{other}"),
}
}
fn lower_normal_array(&mut self, array: ast::NormalArray) -> LowerResult<hir::NormalArray> {
log!(info "entered {}({array})", fn_name!());
let mut new_array = vec![];
let (elems, _) = array.elems.into_iters();
let mut union = Type::Never;
for elem in elems {
let elem = self.lower_expr(elem.expr)?;
union = self.ctx.union(&union, elem.ref_t());
if matches!(union, Type::Or(_, _)) {
return Err(LowerErrors::from(LowerError::syntax_error(
self.cfg.input.clone(),
line!() as usize,
elem.loc(),
AtomicStr::arc(&self.ctx.name[..]),
switch_lang!(
"japanese" => "配列の要素は全て同じ型である必要があります",
"simplified_chinese" => "数组元素必须全部是相同类型",
"traditional_chinese" => "數組元素必須全部是相同類型",
"english" => "all elements of an array must be of the same type",
),
Some(
switch_lang!(
"japanese" => "Int or Strなど明示的に型を指定してください",
"simplified_chinese" => "请明确指定类型，例如：Int or Str",
"traditional_chinese" => "請明確指定類型，例如：Int or Str",
"english" => "please specify the type explicitly, e.g. Int or Str",
)
.into(),
),
)));
}
new_array.push(elem);
}
let elem_t = if union == Type::Never {
free_var(self.ctx.level, Constraint::new_type_of(Type::Type))
} else {
union
};
Ok(hir::NormalArray::new(
array.l_sqbr,
array.r_sqbr,
elem_t,
hir::Args::from(new_array),
))
}
fn lower_array_with_length(
&mut self,
array: ast::ArrayWithLength,
) -> LowerResult<hir::ArrayWithLength> {
log!(info "entered {}({array})", fn_name!());
let elem = self.lower_expr(array.elem.expr)?;
let array_t = self.gen_array_with_length_type(&elem, &array.len);
let len = self.lower_expr(*array.len)?;
let hir_array = hir::ArrayWithLength::new(array.l_sqbr, array.r_sqbr, array_t, elem, len);
Ok(hir_array)
}
fn gen_array_with_length_type(&self, elem: &hir::Expr, len: &ast::Expr) -> Type {
let maybe_len = self.ctx.eval_const_expr(len);
match maybe_len {
Ok(v @ ValueObj::Nat(_)) => {
if elem.ref_t().is_mut_type() {
poly(
"ArrayWithMutType!",
vec![TyParam::t(elem.t()), TyParam::Value(v)],
)
} else {
array_t(elem.t(), TyParam::Value(v))
}
}
Ok(v @ ValueObj::Mut(_)) if v.class() == mono("Nat!") => {
if elem.ref_t().is_mut_type() {
poly(
"ArrayWithMutTypeAndLength!",
vec![TyParam::t(elem.t()), TyParam::Value(v)],
)
} else {
array_mut(elem.t(), TyParam::Value(v))
}
}
Ok(other) => todo!("{other} is not a Nat object"),
Err(_e) => {
if elem.ref_t().is_mut_type() {
poly(
"ArrayWithMutType!",
vec![TyParam::t(elem.t()), TyParam::erased(Type::Nat)],
)
} else {
array_t(elem.t(), TyParam::erased(Type::Nat))
}
}
}
}
fn lower_tuple(&mut self, tuple: ast::Tuple) -> LowerResult<hir::Tuple> {
log!(info "entered {}({tuple})", fn_name!());
match tuple {
ast::Tuple::Normal(tup) => Ok(hir::Tuple::Normal(self.lower_normal_tuple(tup)?)),
}
}
fn lower_normal_tuple(&mut self, tuple: ast::NormalTuple) -> LowerResult<hir::NormalTuple> {
log!(info "entered {}({tuple})", fn_name!());
let mut new_tuple = vec![];
let (elems, _) = tuple.elems.into_iters();
for elem in elems {
let elem = self.lower_expr(elem.expr)?;
new_tuple.push(elem);
}
Ok(hir::NormalTuple::new(hir::Args::from(new_tuple)))
}
fn lower_record(&mut self, record: ast::Record) -> LowerResult<hir::Record> {
log!(info "entered {}({record})", fn_name!());
match record {
ast::Record::Normal(rec) => self.lower_normal_record(rec),
ast::Record::Shortened(_rec) => unreachable!(), }
}
fn lower_normal_record(&mut self, record: ast::NormalRecord) -> LowerResult<hir::Record> {
log!(info "entered {}({record})", fn_name!());
let mut hir_record =
hir::Record::new(record.l_brace, record.r_brace, hir::RecordAttrs::empty());
self.ctx
.grow("<record>", ContextKind::Dummy, Private, None)?;
for attr in record.attrs.into_iter() {
let attr = self.lower_def(attr).map_err(|e| {
self.pop_append_errs();
e
})?;
hir_record.push(attr);
}
self.pop_append_errs();
Ok(hir_record)
}
fn lower_set(&mut self, set: ast::Set) -> LowerResult<hir::Set> {
log!(info "enter {}({set})", fn_name!());
match set {
ast::Set::Normal(set) => Ok(hir::Set::Normal(self.lower_normal_set(set)?)),
ast::Set::WithLength(set) => Ok(hir::Set::WithLength(self.lower_set_with_length(set)?)),
}
}
fn lower_normal_set(&mut self, set: ast::NormalSet) -> LowerResult<hir::NormalSet> {
log!(info "entered {}({set})", fn_name!());
let (elems, _) = set.elems.into_iters();
let mut union = Type::Never;
let mut new_set = vec![];
for elem in elems {
let elem = self.lower_expr(elem.expr)?;
union = self.ctx.union(&union, elem.ref_t());
if union.is_intersection_type() {
return Err(LowerErrors::from(LowerError::syntax_error(
self.cfg.input.clone(),
line!() as usize,
elem.loc(),
AtomicStr::arc(&self.ctx.name[..]),
switch_lang!(
"japanese" => "集合の要素は全て同じ型である必要があります",
"simplified_chinese" => "集合元素必须全部是相同类型",
"traditional_chinese" => "集合元素必須全部是相同類型",
"english" => "all elements of a set must be of the same type",
),
Some(
switch_lang!(
"japanese" => "Int or Strなど明示的に型を指定してください",
"simplified_chinese" => "明确指定类型，例如：Int or Str",
"traditional_chinese" => "明確指定類型，例如：Int or Str",
"english" => "please specify the type explicitly, e.g. Int or Str",
)
.into(),
),
)));
}
new_set.push(elem);
}
let elem_t = if union == Type::Never {
free_var(self.ctx.level, Constraint::new_type_of(Type::Type))
} else {
union
};
let elems = hir::Args::from(new_set);
let sup = poly("Eq", vec![TyParam::t(elem_t.clone())]);
if let Err(errs) = self.ctx.sub_unify(&elem_t, &sup, elems.loc(), None) {
self.errs.extend(errs.into_iter());
}
Ok(hir::NormalSet::new(set.l_brace, set.r_brace, elem_t, elems))
}
fn lower_set_with_length(
&mut self,
set: ast::SetWithLength,
) -> LowerResult<hir::SetWithLength> {
log!("entered {}({set})", fn_name!());
let elem = self.lower_expr(set.elem.expr)?;
let set_t = self.gen_set_with_length_type(&elem, &set.len);
let len = self.lower_expr(*set.len)?;
let hir_set = hir::SetWithLength::new(set.l_brace, set.r_brace, set_t, elem, len);
Ok(hir_set)
}
fn gen_set_with_length_type(&mut self, elem: &hir::Expr, len: &ast::Expr) -> Type {
let maybe_len = self.ctx.eval_const_expr(len);
match maybe_len {
Ok(v @ ValueObj::Nat(_)) => {
if elem.ref_t().is_mut_type() {
poly(
"SetWithMutType!",
vec![TyParam::t(elem.t()), TyParam::Value(v)],
)
} else if self.ctx.subtype_of(&elem.t(), &Type::Type) {
poly("SetType", vec![TyParam::t(elem.t()), TyParam::Value(v)])
} else {
set_t(elem.t(), TyParam::Value(v))
}
}
Ok(v @ ValueObj::Mut(_)) if v.class() == mono("Nat!") => {
if elem.ref_t().is_mut_type() {
poly(
"SetWithMutTypeAndLength!",
vec![TyParam::t(elem.t()), TyParam::Value(v)],
)
} else {
set_mut(elem.t(), TyParam::Value(v))
}
}
Ok(other) => todo!("{other} is not a Nat object"),
Err(_e) => {
if elem.ref_t().is_mut_type() {
poly(
"SetWithMutType!",
vec![TyParam::t(elem.t()), TyParam::erased(Type::Nat)],
)
} else {
set_t(elem.t(), TyParam::erased(Type::Nat))
}
}
}
}
fn lower_dict(&mut self, dict: ast::Dict) -> LowerResult<hir::Dict> {
log!(info "enter {}({dict})", fn_name!());
match dict {
ast::Dict::Normal(set) => Ok(hir::Dict::Normal(self.lower_normal_dict(set)?)),
other => todo!("{other}"),
}
}
fn lower_normal_dict(&mut self, dict: ast::NormalDict) -> LowerResult<hir::NormalDict> {
log!(info "enter {}({dict})", fn_name!());
let mut union = dict! {};
let mut new_kvs = vec![];
for kv in dict.kvs {
let loc = kv.loc();
let key = self.lower_expr(kv.key)?;
let value = self.lower_expr(kv.value)?;
if union.insert(key.t(), value.t()).is_some() {
return Err(LowerErrors::from(LowerError::syntax_error(
self.cfg.input.clone(),
line!() as usize,
loc,
AtomicStr::arc(&self.ctx.name[..]),
switch_lang!(
"japanese" => "Dictの値は全て同じ型である必要があります",
"simplified_chinese" => "Dict的值必须是同一类型",
"traditional_chinese" => "Dict的值必須是同一類型",
"english" => "Values of Dict must be the same type",
),
Some(
switch_lang!(
"japanese" => "Int or Strなど明示的に型を指定してください",
"simplified_chinese" => "明确指定类型，例如：Int or Str",
"traditional_chinese" => "明確指定類型，例如：Int or Str",
"english" => "please specify the type explicitly, e.g. Int or Str",
)
.into(),
),
)));
}
new_kvs.push(hir::KeyValue::new(key, value));
}
for key_t in union.keys() {
let sup = poly("Eq", vec![TyParam::t(key_t.clone())]);
let loc = Location::concat(&dict.l_brace, &dict.r_brace);
if let Err(errs) = self.ctx.sub_unify(key_t, &sup, loc, None) {
self.errs.extend(errs.into_iter());
}
}
let kv_ts = if union.is_empty() {
dict! {
ty_tp(free_var(self.ctx.level, Constraint::new_type_of(Type::Type))) =>
ty_tp(free_var(self.ctx.level, Constraint::new_type_of(Type::Type)))
}
} else {
union
.into_iter()
.map(|(k, v)| (TyParam::t(k), TyParam::t(v)))
.collect()
};
Ok(hir::NormalDict::new(
dict.l_brace,
dict.r_brace,
kv_ts,
new_kvs,
))
}
fn lower_acc(&mut self, acc: ast::Accessor) -> LowerResult<hir::Accessor> {
log!(info "entered {}({acc})", fn_name!());
match acc {
ast::Accessor::Ident(ident) => {
let ident = self.lower_ident(ident)?;
let acc = hir::Accessor::Ident(ident);
Ok(acc)
}
ast::Accessor::Attr(attr) => {
let obj = self.lower_expr(*attr.obj)?;
let t =
self.ctx
.rec_get_attr_t(&obj, &attr.ident, &self.cfg.input, &self.ctx.name)?;
let ident = hir::Identifier::bare(attr.ident.dot, attr.ident.name);
let acc = hir::Accessor::Attr(hir::Attribute::new(obj, ident, t));
Ok(acc)
}
ast::Accessor::TupleAttr(t_attr) => {
let obj = self.lower_expr(*t_attr.obj)?;
let index = self.lower_literal(t_attr.index)?;
let n = enum_unwrap!(index.value, ValueObj::Nat);
let t = enum_unwrap!(
obj.ref_t().typarams().get(n as usize).unwrap().clone(),
TyParam::Type
);
let acc = hir::Accessor::TupleAttr(hir::TupleAttribute::new(obj, index, *t));
Ok(acc)
}
ast::Accessor::Subscr(subscr) => {
let obj = self.lower_expr(*subscr.obj)?;
let index = self.lower_expr(*subscr.index)?;
let t = enum_unwrap!(
obj.ref_t().typarams().get(0).unwrap().clone(),
TyParam::Type
);
let acc = hir::Accessor::Subscr(hir::Subscript::new(obj, index, *t));
Ok(acc)
}
ast::Accessor::TypeApp(_t_app) => {
todo!()
}
}
}
fn lower_ident(&self, ident: ast::Identifier) -> LowerResult<hir::Identifier> {
let (t, __name__) = if ident.vis().is_private() && &ident.inspect()[..] == "match" {
(Type::Failure, None)
} else {
(
self.ctx
.rec_get_var_t(&ident, &self.cfg.input, &self.ctx.name)?,
self.ctx
.get_singular_ctx_by_ident(&ident, &self.ctx.name)
.ok()
.map(|ctx| ctx.name.clone()),
)
};
let ident = hir::Identifier::new(ident.dot, ident.name, __name__, t);
Ok(ident)
}
fn lower_bin(&mut self, bin: ast::BinOp) -> LowerResult<hir::BinOp> {
log!(info "entered {}({bin})", fn_name!());
let mut args = bin.args.into_iter();
let lhs = hir::PosArg::new(self.lower_expr(*args.next().unwrap())?);
let rhs = hir::PosArg::new(self.lower_expr(*args.next().unwrap())?);
let args = [lhs, rhs];
let t = self
.ctx
.get_binop_t(&bin.op, &args, &self.cfg.input, &self.ctx.name)?;
let mut args = args.into_iter();
let lhs = args.next().unwrap().expr;
let rhs = args.next().unwrap().expr;
Ok(hir::BinOp::new(bin.op, lhs, rhs, t))
}
fn lower_unary(&mut self, unary: ast::UnaryOp) -> LowerResult<hir::UnaryOp> {
log!(info "entered {}({unary})", fn_name!());
let mut args = unary.args.into_iter();
let arg = hir::PosArg::new(self.lower_expr(*args.next().unwrap())?);
let args = [arg];
let t = self
.ctx
.get_unaryop_t(&unary.op, &args, &self.cfg.input, &self.ctx.name)?;
let mut args = args.into_iter();
let expr = args.next().unwrap().expr;
Ok(hir::UnaryOp::new(unary.op, expr, t))
}
fn lower_call(&mut self, call: ast::Call) -> LowerResult<hir::Call> {
log!(info "entered {}({}{}(...))", fn_name!(), call.obj, fmt_option!(call.method_name));
let opt_cast_to = if call.is_assert_cast() {
if let Some(typ) = call.assert_cast_target_type() {
Some(Parser::expr_to_type_spec(typ.clone()).map_err(|e| {
let e = LowerError::new(e.into(), self.input().clone(), self.ctx.caused_by());
LowerErrors::from(e)
})?)
} else {
return Err(LowerErrors::from(LowerError::syntax_error(
self.input().clone(),
line!() as usize,
call.args.loc(),
self.ctx.caused_by(),
"invalid assert casting type",
None,
)));
}
} else {
None
};
let (pos_args, kw_args, paren) = call.args.deconstruct();
let mut hir_args = hir::Args::new(
Vec::with_capacity(pos_args.len()),
None,
Vec::with_capacity(kw_args.len()),
paren,
);
for arg in pos_args.into_iter() {
hir_args.push_pos(hir::PosArg::new(self.lower_expr(arg.expr)?));
}
for arg in kw_args.into_iter() {
hir_args.push_kw(hir::KwArg::new(arg.keyword, self.lower_expr(arg.expr)?));
}
let obj = self.lower_expr(*call.obj)?;
let sig_t = self.ctx.get_call_t(
&obj,
&call.method_name,
&hir_args.pos_args,
&hir_args.kw_args,
&self.cfg.input,
&self.ctx.name,
)?;
let method_name = if let Some(method_name) = call.method_name {
Some(hir::Identifier::new(
method_name.dot,
method_name.name,
None,
Type::Uninited,
))
} else {
None
};
let mut call = hir::Call::new(obj, method_name, hir_args, sig_t);
match call.additional_operation() {
Some(kind @ (OperationKind::Import | OperationKind::PyImport)) => {
let mod_name =
enum_unwrap!(call.args.get_left_or_key("Path").unwrap(), hir::Expr::Lit);
if let Err(errs) = self.ctx.import_mod(kind, mod_name) {
self.errs.extend(errs.into_iter());
};
}
Some(OperationKind::Del) => match call.args.get_left_or_key("obj").unwrap() {
hir::Expr::Accessor(hir::Accessor::Ident(ident)) => {
self.ctx.del(ident)?;
}
other => {
return Err(LowerErrors::from(LowerError::syntax_error(
self.input().clone(),
line!() as usize,
other.loc(),
self.ctx.caused_by(),
"",
None,
)))
}
},
_ => {
if let Some(type_spec) = opt_cast_to {
self.ctx.cast(type_spec, &mut call)?;
}
}
}
Ok(call)
}
fn lower_pack(&mut self, pack: ast::DataPack) -> LowerResult<hir::Call> {
log!(info "entered {}({pack})", fn_name!());
let class = self.lower_expr(*pack.class)?;
let args = self.lower_record(pack.args)?;
let args = vec![hir::PosArg::new(hir::Expr::Record(args))];
let method_name = ast::Identifier::new(
Some(Token::new(
TokenKind::Dot,
Str::ever("."),
pack.connector.lineno,
pack.connector.col_begin,
)),
ast::VarName::new(Token::new(
TokenKind::Symbol,
Str::ever("new"),
pack.connector.lineno,
pack.connector.col_begin,
)),
);
let sig_t = self.ctx.get_call_t(
&class,
&Some(method_name.clone()),
&args,
&[],
&self.cfg.input,
&self.ctx.name,
)?;
let args = hir::Args::new(args, None, vec![], None);
let method_name = hir::Identifier::bare(method_name.dot, method_name.name);
Ok(hir::Call::new(class, Some(method_name), args, sig_t))
}
fn lower_lambda(&mut self, lambda: ast::Lambda) -> LowerResult<hir::Lambda> {
log!(info "entered {}({lambda})", fn_name!());
let is_procedural = lambda.is_procedural();
let id = get_hash(&lambda.sig);
let name = format!("<lambda_{id}>");
let kind = if is_procedural {
ContextKind::Proc
} else {
ContextKind::Func
};
let bounds = self
.ctx
.instantiate_ty_bounds(&lambda.sig.bounds, RegistrationMode::Normal)?;
let tv_ctx = TyVarInstContext::new(self.ctx.level, bounds, &self.ctx);
self.ctx.grow(&name, kind, Private, Some(tv_ctx))?;
if let Err(errs) = self.ctx.assign_params(&lambda.sig.params, None) {
self.errs.extend(errs.into_iter());
}
if let Err(errs) = self.ctx.preregister(&lambda.body) {
self.errs.extend(errs.into_iter());
}
let body = self.lower_block(lambda.body).map_err(|e| {
self.pop_append_errs();
e
})?;
let (non_default_params, default_params): (Vec<_>, Vec<_>) = self
.ctx
.params
.iter()
.partition(|(_, v)| !v.kind.has_default());
let non_default_params = non_default_params
.into_iter()
.map(|(name, vi)| {
ParamTy::pos(name.as_ref().map(|n| n.inspect().clone()), vi.t.clone())
})
.collect();
let default_params = default_params
.into_iter()
.map(|(name, vi)| ParamTy::kw(name.as_ref().unwrap().inspect().clone(), vi.t.clone()))
.collect();
let bounds = self
.ctx
.instantiate_ty_bounds(&lambda.sig.bounds, RegistrationMode::Normal)
.map_err(|e| {
self.pop_append_errs();
e
})?;
self.pop_append_errs();
let t = if is_procedural {
proc(non_default_params, None, default_params, body.t())
} else {
func(non_default_params, None, default_params, body.t())
};
let t = if bounds.is_empty() {
t
} else {
quant(t, bounds)
};
Ok(hir::Lambda::new(id, lambda.sig.params, lambda.op, body, t))
}
fn lower_def(&mut self, def: ast::Def) -> LowerResult<hir::Def> {
log!(info "entered {}({})", fn_name!(), def.sig);
if def.def_kind().is_class_or_trait() && self.ctx.kind != ContextKind::Module {
self.ctx.decls.remove(def.sig.ident().unwrap().inspect());
return Err(LowerErrors::from(LowerError::inner_typedef_error(
self.cfg.input.clone(),
line!() as usize,
def.loc(),
self.ctx.caused_by(),
)));
}
let name = if let Some(name) = def.sig.name_as_str() {
name.clone()
} else {
Str::ever("<lambda>")
};
if self
.ctx
.registered_info(&name, def.sig.is_const())
.is_some()
{
return Err(LowerErrors::from(LowerError::reassign_error(
self.cfg.input.clone(),
line!() as usize,
def.sig.loc(),
self.ctx.caused_by(),
&name,
)));
}
let kind = ContextKind::from(def.def_kind());
let vis = def.sig.vis();
let res = match def.sig {
ast::Signature::Subr(sig) => {
let bounds = self
.ctx
.instantiate_ty_bounds(&sig.bounds, RegistrationMode::Normal)?;
let tv_ctx = TyVarInstContext::new(self.ctx.level, bounds, &self.ctx);
self.ctx.grow(&name, kind, vis, Some(tv_ctx))?;
self.lower_subr_def(sig, def.body)
}
ast::Signature::Var(sig) => {
self.ctx.grow(&name, kind, vis, None)?;
self.lower_var_def(sig, def.body)
}
};
self.pop_append_errs();
self.ctx.decls.remove(&name);
res
}
fn lower_var_def(
&mut self,
sig: ast::VarSignature,
body: ast::DefBody,
) -> LowerResult<hir::Def> {
log!(info "entered {}({sig})", fn_name!());
if let Err(errs) = self.ctx.preregister(&body.block) {
self.errs.extend(errs.into_iter());
}
match self.lower_block(body.block) {
Ok(block) => {
let found_body_t = block.ref_t();
let opt_expect_body_t = self
.ctx
.outer
.as_ref()
.unwrap()
.get_current_scope_var(sig.inspect().unwrap())
.map(|vi| vi.t.clone());
let ident = match &sig.pat {
ast::VarPattern::Ident(ident) => ident,
_ => unreachable!(),
};
if let Some(expect_body_t) = opt_expect_body_t {
if !sig.is_const() {
if let Err(e) = self.return_t_check(
sig.loc(),
ident.inspect(),
&expect_body_t,
found_body_t,
) {
self.errs.push(e);
}
}
}
let id = body.id;
self.ctx
.outer
.as_mut()
.unwrap()
.assign_var_sig(&sig, found_body_t, id)?;
let ident = hir::Identifier::bare(ident.dot.clone(), ident.name.clone());
let sig = hir::VarSignature::new(ident, found_body_t.clone());
let body = hir::DefBody::new(body.op, block, body.id);
Ok(hir::Def::new(hir::Signature::Var(sig), body))
}
Err(errs) => {
self.ctx.outer.as_mut().unwrap().assign_var_sig(
&sig,
&Type::Never,
ast::DefId(0),
)?;
Err(errs)
}
}
}
fn lower_subr_def(
&mut self,
sig: ast::SubrSignature,
body: ast::DefBody,
) -> LowerResult<hir::Def> {
log!(info "entered {}({sig})", fn_name!());
let t = self
.ctx
.outer
.as_ref()
.unwrap()
.get_current_scope_var(sig.ident.inspect())
.map(|vi| vi.t.clone())
.unwrap_or(Type::Failure);
match t {
Type::Subr(t) => {
if let Err(errs) = self.ctx.assign_params(&sig.params, Some(t.clone())) {
self.errs.extend(errs.into_iter());
}
if let Err(errs) = self.ctx.preregister(&body.block) {
self.errs.extend(errs.into_iter());
}
match self.lower_block(body.block) {
Ok(block) => {
let found_body_t = block.ref_t();
let expect_body_t = t.return_t.as_ref();
if !sig.is_const() {
if let Err(e) = self.return_t_check(
sig.loc(),
sig.ident.inspect(),
expect_body_t,
found_body_t,
) {
self.errs.push(e);
}
}
let id = body.id;
let t =
self.ctx
.outer
.as_mut()
.unwrap()
.assign_subr(&sig, id, found_body_t)?;
let ident = hir::Identifier::bare(sig.ident.dot, sig.ident.name);
let sig = hir::SubrSignature::new(ident, sig.params, t);
let body = hir::DefBody::new(body.op, block, body.id);
Ok(hir::Def::new(hir::Signature::Subr(sig), body))
}
Err(errs) => {
self.ctx.outer.as_mut().unwrap().assign_subr(
&sig,
ast::DefId(0),
&Type::Failure,
)?;
Err(errs)
}
}
}
Type::Failure => {
if let Err(errs) = self.ctx.assign_params(&sig.params, None) {
self.errs.extend(errs.into_iter());
}
if let Err(errs) = self.ctx.preregister(&body.block) {
self.errs.extend(errs.into_iter());
}
self.ctx
.outer
.as_mut()
.unwrap()
.fake_subr_assign(&sig, Type::Never);
let block = self.lower_block(body.block)?;
let ident = hir::Identifier::bare(sig.ident.dot, sig.ident.name);
let sig = hir::SubrSignature::new(ident, sig.params, Type::Failure);
let body = hir::DefBody::new(body.op, block, body.id);
Ok(hir::Def::new(hir::Signature::Subr(sig), body))
}
_ => unreachable!(),
}
}
fn lower_class_def(&mut self, class_def: ast::ClassDef) -> LowerResult<hir::ClassDef> {
log!(info "entered {}({class_def})", fn_name!());
let mut hir_def = self.lower_def(class_def.def)?;
let mut hir_methods = hir::Block::empty();
for mut methods in class_def.methods_list.into_iter() {
let (class, impl_trait) = match &methods.class {
ast::TypeSpec::TypeApp { spec, args } => {
let (impl_trait, loc) = match &args.args.pos_args().first().unwrap().expr {
ast::Expr::TypeAsc(tasc) => (
self.ctx.instantiate_typespec(
&tasc.t_spec,
None,
None,
RegistrationMode::Normal,
)?,
tasc.t_spec.loc(),
),
_ => unreachable!(),
};
(
self.ctx.instantiate_typespec(
spec,
None,
None,
RegistrationMode::Normal,
)?,
Some((impl_trait, loc)),
)
}
other => (
self.ctx
.instantiate_typespec(other, None, None, RegistrationMode::Normal)?,
None,
),
};
if let Some(class_root) = self.ctx.get_nominal_type_ctx(&class) {
if !class_root.kind.is_class() {
return Err(LowerErrors::from(LowerError::method_definition_error(
self.cfg.input.clone(),
line!() as usize,
methods.loc(),
self.ctx.caused_by(),
&class.qual_name(),
None,
)));
}
} else {
return Err(LowerErrors::from(LowerError::no_var_error(
self.cfg.input.clone(),
line!() as usize,
methods.class.loc(),
self.ctx.caused_by(),
&class.qual_name(),
self.ctx.get_similar_name(&class.local_name()),
)));
}
self.ctx
.grow(&class.local_name(), ContextKind::MethodDefs, Private, None)?;
for def in methods.defs.iter_mut() {
if methods.vis.is(TokenKind::Dot) {
def.sig.ident_mut().unwrap().dot = Some(Token::new(
TokenKind::Dot,
".",
def.sig.ln_begin().unwrap(),
def.sig.col_begin().unwrap(),
));
}
self.ctx.preregister_def(def)?;
}
for def in methods.defs.into_iter() {
let def = self.lower_def(def).map_err(|e| {
self.pop_append_errs();
e
})?;
hir_methods.push(hir::Expr::Def(def));
}
match self.ctx.check_decls_and_pop() {
Ok(methods) => {
self.check_override(&class, &methods);
if let Some((trait_, _)) = &impl_trait {
self.register_trait_impl(&class, trait_);
}
self.check_trait_impl(impl_trait, &class, &methods)?;
self.push_methods(class, methods);
}
Err(mut errs) => {
self.errs.append(&mut errs);
}
}
}
let class = mono(hir_def.sig.ident().inspect());
log!("{class}");
let class_ctx = self.ctx.get_nominal_type_ctx(&class).unwrap();
let type_obj = enum_unwrap!(self.ctx.rec_get_const_obj(hir_def.sig.ident().inspect()).unwrap(), ValueObj::Type:(TypeObj::Generated:(_)));
let sup_type = enum_unwrap!(&hir_def.body.block.first().unwrap(), hir::Expr::Call)
.args
.get_left_or_key("Super")
.unwrap();
Self::check_inheritable(&self.cfg, &mut self.errs, type_obj, sup_type, &hir_def.sig);
let (__new__, need_to_gen_new) = if let (Some(dunder_new_vi), Some(new_vi)) = (
class_ctx.get_current_scope_var("__new__"),
class_ctx.get_current_scope_var("new"),
) {
(dunder_new_vi.t.clone(), new_vi.kind == VarKind::Auto)
} else {
todo!()
};
let require_or_sup = self.get_require_or_sup(hir_def.body.block.remove(0));
Ok(hir::ClassDef::new(
type_obj.kind,
hir_def.sig,
require_or_sup,
need_to_gen_new,
__new__,
hir_methods,
))
}
fn check_inheritable(
cfg: &ErgConfig,
errs: &mut LowerErrors,
type_obj: &GenTypeObj,
sup_class: &hir::Expr,
sub_sig: &hir::Signature,
) {
if let TypeObj::Generated(gen) = type_obj.require_or_sup.as_ref() {
if let Some(impls) = gen.impls.as_ref() {
if !impls.contains_intersec(&mono("InheritableType")) {
errs.push(LowerError::inheritance_error(
cfg.input.clone(),
line!() as usize,
sup_class.to_string(),
sup_class.loc(),
sub_sig.ident().inspect().into(),
));
}
} else {
errs.push(LowerError::inheritance_error(
cfg.input.clone(),
line!() as usize,
sup_class.to_string(),
sup_class.loc(),
sub_sig.ident().inspect().into(),
));
}
}
}
fn check_override(&mut self, class: &Type, ctx: &Context) {
if let Some(sups) = self.ctx.get_nominal_super_type_ctxs(class) {
for sup in sups.into_iter().skip(1) {
for (method_name, vi) in ctx.locals.iter() {
if let Some(_sup_vi) = sup.get_current_scope_var(method_name.inspect()) {
if let Some(decos) = &vi.comptime_decos {
if decos.contains("Override") {
continue;
}
}
self.errs.push(LowerError::override_error(
self.cfg.input.clone(),
line!() as usize,
method_name.inspect(),
method_name.loc(),
&mono(&sup.name), ctx.caused_by(),
));
}
}
}
}
}
fn check_trait_impl(
&mut self,
impl_trait: Option<(Type, Location)>,
class: &Type,
methods: &Context,
) -> SingleLowerResult<()> {
if let Some((impl_trait, loc)) = impl_trait {
let trait_ctx = self.ctx.get_nominal_type_ctx(&impl_trait).unwrap().clone();
let (_, class_ctx) = self.ctx.get_mut_nominal_type_ctx(class).unwrap();
class_ctx.register_supertrait(impl_trait.clone(), &trait_ctx);
if let Some(trait_obj) = self.ctx.rec_get_const_obj(&impl_trait.local_name()) {
if let ValueObj::Type(typ) = trait_obj {
match typ {
TypeObj::Generated(gen) => match gen.require_or_sup.as_ref().typ() {
Type::Record(attrs) => {
let mut unverified_names =
methods.locals.keys().collect::<Set<_>>();
for (field, typ) in attrs.iter() {
if let Some((name, vi)) = methods.get_local_kv(&field.symbol) {
unverified_names.remove(name);
if !self.ctx.supertype_of(typ, &vi.t) {
self.errs.push(LowerError::trait_member_type_error(
self.cfg.input.clone(),
line!() as usize,
name.loc(),
self.ctx.caused_by(),
name.inspect(),
&impl_trait,
typ,
&vi.t,
None,
));
}
} else {
self.errs.push(LowerError::trait_member_not_defined_error(
self.cfg.input.clone(),
line!() as usize,
self.ctx.caused_by(),
&field.symbol,
&impl_trait,
class,
None,
));
}
}
for unverified in unverified_names {
self.errs.push(LowerError::trait_member_not_defined_error(
self.cfg.input.clone(),
line!() as usize,
self.ctx.caused_by(),
unverified.inspect(),
&impl_trait,
class,
None,
));
}
}
other => todo!("{other}"),
},
TypeObj::Builtin(_builtin) => todo!(),
}
} else {
return Err(LowerError::type_mismatch_error(
self.cfg.input.clone(),
line!() as usize,
loc,
self.ctx.caused_by(),
&impl_trait.qual_name(),
&Type::TraitType,
&trait_obj.t(),
None,
None,
));
}
} else {
return Err(LowerError::no_var_error(
self.cfg.input.clone(),
line!() as usize,
loc,
self.ctx.caused_by(),
&impl_trait.qual_name(),
self.ctx.get_similar_name(&impl_trait.local_name()),
));
}
}
Ok(())
}
fn register_trait_impl(&mut self, class: &Type, trait_: &Type) {
if let Some(impls) = self.ctx.trait_impls.get_mut(&trait_.qual_name()) {
impls.insert(TraitInstance::new(class.clone(), trait_.clone()));
} else {
self.ctx.trait_impls.insert(
trait_.qual_name(),
set! {TraitInstance::new(class.clone(), trait_.clone())},
);
}
}
fn push_methods(&mut self, class: Type, methods: Context) {
let (_, class_root) = self
.ctx
.get_mut_nominal_type_ctx(&class)
.unwrap_or_else(|| todo!("{class} not found"));
for (newly_defined_name, _vi) in methods.locals.iter() {
for (_, already_defined_methods) in class_root.methods_list.iter_mut() {
if let Some((_already_defined_name, already_defined_vi)) =
already_defined_methods.get_local_kv(newly_defined_name.inspect())
{
if already_defined_vi.kind != VarKind::Auto {
self.errs.push(LowerError::duplicate_definition_error(
self.cfg.input.clone(),
line!() as usize,
newly_defined_name.loc(),
methods.name.clone().into(),
newly_defined_name.inspect(),
));
} else {
already_defined_methods
.locals
.remove(&newly_defined_name.inspect()[..]);
}
}
}
}
class_root
.methods_list
.push((ClassDefType::Simple(class), methods));
}
fn get_require_or_sup(&self, expr: hir::Expr) -> hir::Expr {
match expr {
acc @ hir::Expr::Accessor(_) => acc,
hir::Expr::Call(mut call) => match call.obj.show_acc().as_ref().map(|s| &s[..]) {
Some("Class") => call.args.remove_left_or_key("Requirement").unwrap(),
Some("Inherit") => call.args.remove_left_or_key("Super").unwrap(),
Some("Inheritable") => {
self.get_require_or_sup(call.args.remove_left_or_key("Class").unwrap())
}
_ => todo!(),
},
other => todo!("{other}"),
}
}
fn lower_type_asc(&mut self, tasc: ast::TypeAscription) -> LowerResult<hir::TypeAscription> {
log!(info "entered {}({tasc})", fn_name!());
let t =
self.ctx
.instantiate_typespec(&tasc.t_spec, None, None, RegistrationMode::Normal)?;
let expr = self.lower_expr(*tasc.expr)?;
self.ctx.sub_unify(
expr.ref_t(),
&t,
expr.loc(),
Some(&Str::from(expr.to_string())),
)?;
Ok(hir::TypeAscription::new(expr, tasc.t_spec))
}
fn lower_expr(&mut self, expr: ast::Expr) -> LowerResult<hir::Expr> {
log!(info "entered {}", fn_name!());
match expr {
ast::Expr::Lit(lit) => Ok(hir::Expr::Lit(self.lower_literal(lit)?)),
ast::Expr::Array(arr) => Ok(hir::Expr::Array(self.lower_array(arr)?)),
ast::Expr::Tuple(tup) => Ok(hir::Expr::Tuple(self.lower_tuple(tup)?)),
ast::Expr::Record(rec) => Ok(hir::Expr::Record(self.lower_record(rec)?)),
ast::Expr::Set(set) => Ok(hir::Expr::Set(self.lower_set(set)?)),
ast::Expr::Dict(dict) => Ok(hir::Expr::Dict(self.lower_dict(dict)?)),
ast::Expr::Accessor(acc) => Ok(hir::Expr::Accessor(self.lower_acc(acc)?)),
ast::Expr::BinOp(bin) => Ok(hir::Expr::BinOp(self.lower_bin(bin)?)),
ast::Expr::UnaryOp(unary) => Ok(hir::Expr::UnaryOp(self.lower_unary(unary)?)),
ast::Expr::Call(call) => Ok(hir::Expr::Call(self.lower_call(call)?)),
ast::Expr::DataPack(pack) => Ok(hir::Expr::Call(self.lower_pack(pack)?)),
ast::Expr::Lambda(lambda) => Ok(hir::Expr::Lambda(self.lower_lambda(lambda)?)),
ast::Expr::Def(def) => Ok(hir::Expr::Def(self.lower_def(def)?)),
ast::Expr::ClassDef(defs) => Ok(hir::Expr::ClassDef(self.lower_class_def(defs)?)),
ast::Expr::TypeAsc(tasc) => Ok(hir::Expr::TypeAsc(self.lower_type_asc(tasc)?)),
other => todo!("{other}"),
}
}
fn lower_block(&mut self, ast_block: ast::Block) -> LowerResult<hir::Block> {
log!(info "entered {}", fn_name!());
let mut hir_block = Vec::with_capacity(ast_block.len());
for chunk in ast_block.into_iter() {
let chunk = self.lower_expr(chunk)?;
hir_block.push(chunk);
}
Ok(hir::Block::new(hir_block))
}
fn declare_var_alias(
&mut self,
sig: ast::VarSignature,
mut body: ast::DefBody,
) -> LowerResult<hir::Def> {
log!(info "entered {}({sig})", fn_name!());
if body.block.len() > 1 {
return Err(LowerErrors::from(LowerError::declare_error(
self.cfg.input.clone(),
line!() as usize,
body.block.loc(),
self.ctx.caused_by(),
)));
}
let block = hir::Block::new(vec![self.declare_chunk(body.block.remove(0))?]);
let found_body_t = block.ref_t();
let ident = match &sig.pat {
ast::VarPattern::Ident(ident) => ident,
_ => unreachable!(),
};
let id = body.id;
self.ctx.assign_var_sig(&sig, found_body_t, id)?;
let ident = hir::Identifier::bare(ident.dot.clone(), ident.name.clone());
let sig = hir::VarSignature::new(ident, found_body_t.clone());
let body = hir::DefBody::new(body.op, block, body.id);
Ok(hir::Def::new(hir::Signature::Var(sig), body))
}
fn declare_alias(&mut self, def: ast::Def) -> LowerResult<hir::Def> {
log!(info "entered {}({})", fn_name!(), def.sig);
let name = if let Some(name) = def.sig.name_as_str() {
name.clone()
} else {
Str::ever("<lambda>")
};
if self
.ctx
.registered_info(&name, def.sig.is_const())
.is_some()
{
return Err(LowerErrors::from(LowerError::reassign_error(
self.cfg.input.clone(),
line!() as usize,
def.sig.loc(),
self.ctx.caused_by(),
&name,
)));
}
let res = match def.sig {
ast::Signature::Subr(_sig) => todo!(),
ast::Signature::Var(sig) => self.declare_var_alias(sig, def.body),
};
self.pop_append_errs();
res
}
fn fake_lower_obj(&self, obj: ast::Expr) -> LowerResult<hir::Expr> {
match obj {
ast::Expr::Accessor(ast::Accessor::Ident(ident)) => {
let acc = hir::Accessor::Ident(hir::Identifier::bare(ident.dot, ident.name));
Ok(hir::Expr::Accessor(acc))
}
ast::Expr::Accessor(ast::Accessor::Attr(attr)) => {
let obj = self.fake_lower_obj(*attr.obj)?;
let ident = hir::Identifier::bare(attr.ident.dot, attr.ident.name);
let acc = hir::Accessor::attr(obj, ident, Type::Uninited);
Ok(hir::Expr::Accessor(acc))
}
other => Err(LowerErrors::from(LowerError::declare_error(
self.cfg.input.clone(),
line!() as usize,
other.loc(),
self.ctx.caused_by(),
))),
}
}
fn declare_type(&mut self, tasc: ast::TypeAscription) -> LowerResult<hir::TypeAscription> {
log!(info "entered {}({})", fn_name!(), tasc);
match *tasc.expr {
ast::Expr::Accessor(ast::Accessor::Ident(ident)) => {
let t = self.ctx.instantiate_typespec(
&tasc.t_spec,
None,
None,
RegistrationMode::Normal,
)?;
if ident.is_const() {
let vi = VarInfo::new(
t.clone(),
Mutability::Const,
ident.vis(),
VarKind::Declared,
None,
);
self.ctx.decls.insert(ident.name.clone(), vi);
}
self.ctx.assign_var_sig(
&ast::VarSignature::new(ast::VarPattern::Ident(ident.clone()), None),
&t,
ast::DefId(0),
)?;
match t {
Type::ClassType => {
let ty_obj = GenTypeObj::new(
TypeKind::Class,
mono(format!("{}{ident}", self.ctx.path())),
TypeObj::Builtin(Type::Uninited),
None,
None,
);
self.ctx.register_gen_type(&ident, ty_obj);
}
Type::TraitType => {
let ty_obj = GenTypeObj::new(
TypeKind::Trait,
mono(format!("{}{ident}", self.ctx.path())),
TypeObj::Builtin(Type::Uninited),
None,
None,
);
self.ctx.register_gen_type(&ident, ty_obj);
}
_ => {}
}
let ident = hir::Identifier::new(ident.dot, ident.name, None, t);
Ok(hir::TypeAscription::new(
hir::Expr::Accessor(hir::Accessor::Ident(ident)),
tasc.t_spec,
))
}
ast::Expr::Accessor(ast::Accessor::Attr(attr)) => {
let t = self.ctx.instantiate_typespec(
&tasc.t_spec,
None,
None,
RegistrationMode::Normal,
)?;
let namespace = self.ctx.name.clone();
let ctx = self
.ctx
.get_mut_singular_ctx(attr.obj.as_ref(), &namespace)?;
ctx.assign_var_sig(
&ast::VarSignature::new(ast::VarPattern::Ident(attr.ident.clone()), None),
&t,
ast::DefId(0),
)?;
let obj = self.fake_lower_obj(*attr.obj)?;
let ident =
hir::Identifier::new(attr.ident.dot, attr.ident.name, None, Type::Uninited);
let attr = hir::Accessor::attr(obj, ident, t);
Ok(hir::TypeAscription::new(
hir::Expr::Accessor(attr),
tasc.t_spec,
))
}
other => Err(LowerErrors::from(LowerError::declare_error(
self.cfg.input.clone(),
line!() as usize,
other.loc(),
self.ctx.caused_by(),
))),
}
}
fn declare_chunk(&mut self, expr: ast::Expr) -> LowerResult<hir::Expr> {
log!(info "entered {}", fn_name!());
match expr {
ast::Expr::Def(def) => Ok(hir::Expr::Def(self.declare_alias(def)?)),
ast::Expr::ClassDef(defs) => Err(LowerErrors::from(LowerError::feature_error(
self.cfg.input.clone(),
defs.loc(),
"class declaration",
self.ctx.caused_by(),
))),
ast::Expr::TypeAsc(tasc) => Ok(hir::Expr::TypeAsc(self.declare_type(tasc)?)),
other => Err(LowerErrors::from(LowerError::declare_error(
self.cfg.input.clone(),
line!() as usize,
other.loc(),
self.ctx.caused_by(),
))),
}
}
fn declare_module(&mut self, ast: AST) -> HIR {
let mut module = hir::Module::with_capacity(ast.module.len());
for chunk in ast.module.into_iter() {
match self.declare_chunk(chunk) {
Ok(chunk) => {
module.push(chunk);
}
Err(errs) => {
self.errs.extend(errs.into_iter());
}
}
}
HIR::new(ast.name, module)
}
pub fn lower(
&mut self,
ast: AST,
mode: &str,
) -> Result<(HIR, LowerWarnings), (Option<HIR>, LowerErrors)> {
log!(info "the AST lowering process has started.");
log!(info "the type-checking process has started.");
let ast = Reorderer::new(self.cfg.clone())
.reorder(ast)
.map_err(|errs| (None, errs))?;
if mode == "declare" {
let hir = self.declare_module(ast);
if self.errs.is_empty() {
log!(info "HIR:\n{hir}");
log!(info "the declaring process has completed.");
return Ok((hir, LowerWarnings::from(self.warns.take_all())));
} else {
log!(err "the declaring process has failed.");
return Err((Some(hir), LowerErrors::from(self.errs.take_all())));
}
}
let mut module = hir::Module::with_capacity(ast.module.len());
if let Err(errs) = self.ctx.preregister(ast.module.block()) {
self.errs.extend(errs.into_iter());
}
for chunk in ast.module.into_iter() {
match self.lower_expr(chunk) {
Ok(chunk) => {
module.push(chunk);
}
Err(errs) => {
self.errs.extend(errs.into_iter());
}
}
}
self.ctx.check_decls().unwrap_or_else(|mut errs| {
self.errs.append(&mut errs);
});
let hir = HIR::new(ast.name, module);
log!(info "HIR (not resolved, current errs: {}):\n{hir}", self.errs.len());
let hir = match self.ctx.resolve(hir) {
Ok(hir) => {
log!(info "HIR (resolved):\n{hir}");
hir
}
Err((hir, errs)) => {
self.errs.extend(errs.into_iter());
log!(err "the resolving process has failed. errs: {}", self.errs.len());
return Err((Some(hir), LowerErrors::from(self.errs.take_all())));
}
};
for chunk in hir.module.iter() {
if let Err(err) = self.use_check(chunk, mode) {
self.errs.push(err);
}
}
if self.errs.is_empty() {
log!(info "the AST lowering process has completed.");
Ok((hir, LowerWarnings::from(self.warns.take_all())))
} else {
log!(err "the AST lowering process has failed. errs: {}", self.errs.len());
Err((Some(hir), LowerErrors::from(self.errs.take_all())))
}
}
}