Add: floordiv

compiler/erg_compiler/context/eval.rs

@@ -52,6 +52,7 @@ fn try_get_op_kind_from_token(kind: TokenKind) -> EvalResult<OpKind> {
         TokenKind::Minus => Ok(OpKind::Sub),
         TokenKind::Star => Ok(OpKind::Mul),
         TokenKind::Slash => Ok(OpKind::Div),
+        TokenKind::FloorDiv => Ok(OpKind::FloorDiv),
         TokenKind::Pow => Ok(OpKind::Pow),
         TokenKind::Mod => Ok(OpKind::Mod),
         TokenKind::DblEq => Ok(OpKind::Eq),
@@ -78,6 +79,7 @@ fn op_to_name(op: OpKind) -> &'static str {
         OpKind::Sub => "__sub__",
         OpKind::Mul => "__mul__",
         OpKind::Div => "__div__",
+        OpKind::FloorDiv => "__floordiv__",
         OpKind::Mod => "__mod__",
         OpKind::Pow => "__pow__",
         OpKind::Pos => "__pos__",
@@ -664,6 +666,13 @@ impl Context {
                     line!(),
                 ))
             }),
+            FloorDiv => lhs.try_floordiv(rhs).ok_or_else(|| {
+                EvalErrors::from(EvalError::unreachable(
+                    self.cfg.input.clone(),
+                    fn_name!(),
+                    line!(),
+                ))
+            }),
             Gt => lhs.try_gt(rhs).ok_or_else(|| {
                 EvalErrors::from(EvalError::unreachable(
                     self.cfg.input.clone(),

compiler/erg_compiler/error.rs

@@ -25,6 +25,7 @@ pub fn binop_to_dname(op: &str) -> &str {
         "-" => "__sub__",
         "*" => "__mul__",
         "/" => "__div__",
+        "//" => "__floordiv__",
         "**" => "__pow__",
         "%" => "__mod__",
         ".." => "__rng__",
@@ -66,6 +67,7 @@ pub fn readable_name(name: &str) -> &str {
         "__sub__" => "`-`",
         "__mul__" => "`*`",
         "__div__" => "`/`",
+        "__floordiv__" => "`//`",
         "__pow__" => "`**`",
         "__mod__" => "`%`",
         "__rng__" => "`..`",

compiler/erg_type/typaram.rs

@@ -17,6 +17,7 @@ pub enum OpKind {
     Sub,
     Mul,
     Div,
+    FloorDiv,
     Pow,
     Mod,
     Pos,
@@ -45,6 +46,7 @@ impl fmt::Display for OpKind {
             Self::Sub => write!(f, "-"),
             Self::Mul => write!(f, "*"),
             Self::Div => write!(f, "/"),
+            Self::FloorDiv => write!(f, "//"),
             Self::Pow => write!(f, "**"),
             Self::Mod => write!(f, "%"),
             Self::Pos => write!(f, "+"),