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- type Name = String;
- #[derive(Debug, Clone)]
- pub enum Stmt {
- Puts(Expr),
- Fix(Name),
- Assn(Name, Expr),
- LitAssn(Name, Vec<String>),
- }
- #[derive(Debug, Clone)]
- pub enum Expr {
- Var(Name),
- Cat(Vec<Expr>),
- Chc(Vec<Choice>),
- Rep(i64, Box<Expr>),
- Lit(Literal),
- Ap(Box<Expr>, Box<Expr>),
- Tup(Vec<Expr>),
- Let(Name, Box<Expr>, Box<Expr>),
- Fun(Vec<Case>),
- Case(Box<Expr>, Vec<Case>),
- Range(Box<Expr>, Box<Expr>),
- }
- #[derive(Debug, Clone)]
- pub struct Case {
- pub pat: Pat,
- pub expr: Expr,
- }
- #[derive(Debug, Clone)]
- pub enum Pat {
- Var(Name),
- Lit(Literal),
- Tup(Vec<Pat>),
- }
- #[derive(Debug, Clone)]
- pub struct Choice {
- pub weight: Option<i64>,
- pub value: Expr,
- }
- impl Choice {
- pub fn weight(&self) -> i64 {
- self.weight.unwrap_or(1)
- }
- }
- #[derive(Debug, Clone)]
- pub enum Literal {
- Str(String),
- Atom(String),
- Num(i64),
- }
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