62 lines
1.8 KiB
Rust
62 lines
1.8 KiB
Rust
/* Serene --- Yet an other Lisp
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*
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* Copyright (c) 2020 Sameer Rahmani <lxsameer@gnu.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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use crate::ast::Node;
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use std::fmt;
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// Note: I kept the number implementation simple for now
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// but we need to decide on our approach to numbers, are
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// we going to only support the 64bit variants? or should
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// try to be smart and support 32 and 64 and switch between
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// them ?
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// What about usize and isize ?
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#[derive(Debug, Clone)]
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pub enum Number {
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Integer(i64),
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Float(f64),
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}
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impl PartialEq for Number {
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fn eq(&self, other: &Self) -> bool {
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// TODO: Eval other
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let comb = (&self, &other);
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match comb {
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(Number::Integer(x), Number::Integer(y)) => *x == *y,
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(Number::Float(x), Number::Float(y)) => *x == *y,
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(Number::Integer(x), Number::Float(y)) => *x as f64 == *y,
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(Number::Float(x), Number::Integer(y)) => *x == *y as f64,
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}
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}
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}
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impl Eq for Number {}
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impl Node for Number {
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fn get_type_str(&self) -> &str {
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"Number"
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}
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}
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impl fmt::Display for Number {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self {
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Self::Integer(n) => write!(f, "{}", n),
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Self::Float(n) => write!(f, "{}", n),
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}
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}
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}
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