1  // Copyright (C) 2019-2025 ADnet Contributors
 2  // This file is part of the ADL library.
 3  
 4  // The ADL library is free software: you can redistribute it and/or modify
 5  // it under the terms of the GNU General Public License as published by
 6  // the Free Software Foundation, either version 3 of the License, or
 7  // (at your option) any later version.
 8  
 9  // The ADL library is distributed in the hope that it will be useful,
10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  // GNU General Public License for more details.
13  
14  // You should have received a copy of the GNU General Public License
15  // along with the ADL library. If not, see <https://www.gnu.org/licenses/>.
16  
17  use crate::Type;
18  
19  use adl_span::Symbol;
20  use serde::{Deserialize, Serialize};
21  use std::fmt;
22  
23  /// A mapping type of a key and value type.
24  #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
25  pub struct MappingType {
26      pub key: Box<Type>,
27      pub value: Box<Type>,
28      pub program: Symbol,
29  }
30  
31  impl fmt::Display for MappingType {
32      fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
33          write!(f, "({} => {})", self.key, self.value)
34      }
35  }