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Get/Set variables from the environment

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Dane Johnson 2022-06-01 16:35:35 -05:00
parent 2a7db71ded
commit 5436a706d7
1 changed files with 5 additions and 0 deletions
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5
rust/src/evaluator.rs
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@ -31,12 +31,17 @@ impl<'a> Env<'a> {
panic!("Variable {} not in scope.", id) panic!("Variable {} not in scope.", id)
} }
} }
pub fn set(&mut self, id: String, atom: Atom) {
self.values.insert(id, atom);
}
} }
pub fn eval(ast: &parser::Stmt, env: &mut Env) { pub fn eval(ast: &parser::Stmt, env: &mut Env) {
match &ast { match &ast {
parser::Stmt::ReplPrint(expr) => parser::Stmt::ReplPrint(expr) =>
println!("{}", eval_expr(expr, env)), println!("{}", eval_expr(expr, env)),
parser::Stmt::Assignment(id, expr) =>
env.set(id.clone(), eval_expr(expr, env)),
_ => todo!(), _ => todo!(),
} }
} }