37 lines
684 B
Rust
37 lines
684 B
Rust
use crate::types::{Expression, List, Number, Symbol};
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#[derive(Debug, Eq, PartialEq, Clone)]
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pub enum Expr {
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Sym(Symbol),
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Str(String),
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Num(Number),
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Comment,
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Error(String),
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Cons(List<Expr>),
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Nil,
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NoMatch,
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}
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impl Expr {
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pub fn make_list(first: Expr, rest: Expr) -> Expr {
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Expr::Cons(List::<Expr>::new(Box::new(first), Box::new(rest)))
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}
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pub fn make_symbol(v: String) -> Expr {
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Expr::Sym(Symbol::new(v))
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}
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pub fn make_string(v: String) -> Expr {
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Expr::Str(v)
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}
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pub fn make_number(n: Number) -> Expr {
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Expr::Num(n)
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}
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}
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impl Expression for Expr {
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fn eval() {}
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fn code_gen() {}
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}
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