use crate::ast::expr::Expr;

#[derive(Debug, Clone)]
pub enum Stmt {
    /// let x = expr;
    Let {
        name: String,
        initializer: Expr,
    },

    /// 表达式语句：expr;
    ExprStmt(Expr),

    /// 代码块：{ ... }
    Block(Vec<Stmt>),

    /// if 语句
    If {
        condition: Expr,
        then_branch: Box<Stmt>,
        else_branch: Option<Box<Stmt>>,
    },

    /// while 循环
    While {
        condition: Expr,
        body: Box<Stmt>,
    },

    /// 函数声明
    Function {
        name: String,
        params: Vec<String>,
        body: Vec<Stmt>,
    },

    /// return expr?;
    Return(Option<Expr>),
}