Impl Tuple type checking & code generating

compiler/erg_compiler/codegen.rs

@@ -27,7 +27,7 @@ use crate::compile::{AccessKind, Name, StoreLoadKind};
 use crate::error::{CompileError, CompileErrors, CompileResult};
 use crate::eval::eval_lit;
 use crate::hir::{
-    Accessor, Args, Array, Block, DefBody, Expr, Signature, SubrSignature, VarSignature, HIR,
+    Accessor, Args, Array, Block, DefBody, Expr, Signature, SubrSignature, Tuple, VarSignature, HIR,
 };
 use AccessKind::*;
 
@@ -1216,6 +1216,23 @@ impl CodeGenerator {
                 }
                 other => todo!("{other}"),
             },
+            // TODO: tuple comprehension
+            // TODO: tuples can be const
+            Expr::Tuple(tup) => match tup {
+                Tuple::Normal(mut tup) => {
+                    let len = tup.elems.len();
+                    while let Some(arg) = tup.elems.try_remove_pos(0) {
+                        self.codegen_expr(arg.expr);
+                    }
+                    self.write_instr(BUILD_TUPLE);
+                    self.write_arg(len as u8);
+                    if len == 0 {
+                        self.stack_inc();
+                    } else {
+                        self.stack_dec_n(len - 1);
+                    }
+                }
+            },
             Expr::Record(rec) => {
                 let attrs_len = rec.attrs.len();
                 // importing namedtuple

compiler/erg_compiler/context/tyvar.rs

@@ -399,6 +399,14 @@ impl Context {
                 }
                 _ => todo!(),
             },
+            hir::Expr::Tuple(tuple) => match tuple {
+                hir::Tuple::Normal(tup) => {
+                    for elem in tup.elems.pos_args.iter_mut() {
+                        self.deref_expr_t(&mut elem.expr)?;
+                    }
+                    Ok(())
+                }
+            },
             hir::Expr::Dict(_dict) => {
                 todo!()
             }

compiler/erg_compiler/hir.rs

@@ -14,7 +14,7 @@ use erg_common::{
 use erg_parser::ast::{fmt_lines, DefId, Identifier, Params, VarPattern};
 use erg_parser::token::{Token, TokenKind};
 
-use erg_type::constructors::array;
+use erg_type::constructors::{array, tuple};
 use erg_type::typaram::TyParam;
 use erg_type::value::ValueObj;
 use erg_type::{impl_t, impl_t_for_enum, HasType, Type};
@@ -545,6 +545,42 @@ impl_display_for_enum!(Array; Normal, Comprehension, WithLength);
 impl_locational_for_enum!(Array; Normal, Comprehension, WithLength);
 impl_t_for_enum!(Array; Normal, Comprehension, WithLength);
 
+#[derive(Debug, Clone)]
+pub struct NormalTuple {
+    pub elems: Args,
+    t: Type,
+}
+
+impl NestedDisplay for NormalTuple {
+    fn fmt_nest(&self, f: &mut fmt::Formatter<'_>, level: usize) -> fmt::Result {
+        writeln!(f, "(")?;
+        self.elems.fmt_nest(f, level + 1)?;
+        write!(f, "\n{})(: {})", "    ".repeat(level), self.t)
+    }
+}
+
+impl_display_from_nested!(NormalTuple);
+impl_locational!(NormalTuple, elems);
+impl_t!(NormalTuple);
+
+impl NormalTuple {
+    pub fn new(elems: Args) -> Self {
+        let t = tuple(elems.pos_args.iter().map(|a| a.expr.t()).collect());
+        Self { elems, t }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub enum Tuple {
+    Normal(NormalTuple),
+    // Comprehension(TupleComprehension),
+}
+
+impl_nested_display_for_enum!(Tuple; Normal);
+impl_display_for_enum!(Tuple; Normal);
+impl_locational_for_enum!(Tuple; Normal);
+impl_t_for_enum!(Tuple; Normal);
+
 #[derive(Debug, Clone)]
 pub struct NormalDict {
     pub l_brace: Token,
@@ -1174,6 +1210,7 @@ pub enum Expr {
     Lit(Literal),
     Accessor(Accessor),
     Array(Array),
+    Tuple(Tuple),
     // Set(Set),
     Dict(Dict),
     Record(Record),
@@ -1185,10 +1222,10 @@ pub enum Expr {
     Def(Def),
 }
 
-impl_nested_display_for_chunk_enum!(Expr; Lit, Accessor, Array, Dict, Record, BinOp, UnaryOp, Call, Lambda, Decl, Def);
+impl_nested_display_for_chunk_enum!(Expr; Lit, Accessor, Array, Tuple, Dict, Record, BinOp, UnaryOp, Call, Lambda, Decl, Def);
 impl_display_from_nested!(Expr);
-impl_locational_for_enum!(Expr; Lit, Accessor, Array, Dict, Record, BinOp, UnaryOp, Call, Lambda, Decl, Def);
-impl_t_for_enum!(Expr; Lit, Accessor, Array, Dict, Record, BinOp, UnaryOp, Call, Lambda, Decl, Def);
+impl_locational_for_enum!(Expr; Lit, Accessor, Array, Tuple, Dict, Record, BinOp, UnaryOp, Call, Lambda, Decl, Def);
+impl_t_for_enum!(Expr; Lit, Accessor, Array, Tuple, Dict, Record, BinOp, UnaryOp, Call, Lambda, Decl, Def);
 
 impl Expr {
     pub fn receiver_t(&self) -> Option<&Type> {

compiler/erg_compiler/lower.rs

@@ -200,6 +200,24 @@ impl ASTLowerer {
         }
     }
 
+    fn lower_tuple(&mut self, tuple: ast::Tuple) -> LowerResult<hir::Tuple> {
+        log!("[DEBUG] 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!("[DEBUG] 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!("[DEBUG] entered {}({record})", fn_name!());
         let mut hir_record =
@@ -477,6 +495,7 @@ impl ASTLowerer {
         match expr {
             ast::Expr::Lit(lit) => Ok(hir::Expr::Lit(hir::Literal::from(lit.token))),
             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::Accessor(acc) => Ok(hir::Expr::Accessor(self.lower_acc(acc)?)),
             ast::Expr::BinOp(bin) => Ok(hir::Expr::BinOp(self.lower_bin(bin)?)),

compiler/erg_compiler/ownercheck.rs

@@ -11,7 +11,7 @@ use Visibility::*;
 use erg_type::{ArgsOwnership, HasType, Ownership};
 
 use crate::error::{OwnershipError, OwnershipErrors, OwnershipResult};
-use crate::hir::{self, Accessor, Array, Block, Def, Expr, Signature, HIR};
+use crate::hir::{self, Accessor, Array, Block, Def, Expr, Signature, Tuple, HIR};
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub enum WrapperKind {
@@ -186,6 +186,13 @@ impl OwnershipChecker {
                 }
                 _ => todo!(),
             },
+            Expr::Tuple(tuple) => match tuple {
+                Tuple::Normal(arr) => {
+                    for a in arr.elems.pos_args.iter() {
+                        self.check_expr(&a.expr, ownership);
+                    }
+                }
+            },
             Expr::Dict(dict) => match dict {
                 hir::Dict::Normal(dic) => {
                     for a in dic.attrs.kw_args.iter() {