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pub mod util;
pub mod display;
pub mod check;
use crate::sexp::SExp;
#[derive(Clone,Debug,PartialEq)]
pub enum Type {
Integer,
Arrow(Box<Type>, Box<Type>),
List(Vec<Type>),
UndefinedType, // only for errors
}
#[derive(Debug,PartialEq)]
pub enum TypeError {
UndefinedVariable(String),
InvalidOperator {
operator: SExp,
expected: Type,
found: Type,
},
InvalidArgList {
arglist: SExp,
expected: Type,
found: Type,
},
OtherError
}
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