Introduce Array type

compiler/ast/src/types/array.rs

@@ -0,0 +1,50 @@
+// Copyright (C) 2019-2023 Aleo Systems Inc.
+// This file is part of the Leo library.
+
+// The Leo library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// The Leo library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with the Leo library. If not, see <https://www.gnu.org/licenses/>.
+
+use crate::Type;
+
+use serde::{Deserialize, Serialize};
+use std::fmt;
+
+/// An array type.
+#[derive(Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
+pub struct ArrayType {
+    element: Box<Type>,
+    size: u32,
+}
+
+impl ArrayType {
+    /// Creates a new array type.
+    pub fn new(element: Type, size: u32) -> Self {
+        Self { element: Box::new(element), size }
+    }
+
+    /// Returns the element type of the array.
+    pub fn element(&self) -> &Type {
+        &self.element
+    }
+
+    /// Returns the size of the array.
+    pub fn size(&self) -> u32 {
+        self.size
+    }
+}
+
+impl fmt::Display for ArrayType {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "[{}; {}]", self.element, self.size)
+    }
+}

compiler/ast/src/types/mod.rs

@@ -13,6 +13,10 @@
 
 // You should have received a copy of the GNU General Public License
 // along with the Leo library. If not, see <https://www.gnu.org/licenses/>.
+
+pub mod array;
+pub use array::*;
+
 pub mod core_constant;
 pub use core_constant::*;