Method increment

src/ast/stmt.rs:98–104

(name: Name)

    }

    pub fn increment(name: Name) -> Self {
        let span = name.span();
        Self::ChangeVar {
            name,
            value: Box::new(Value::from(1.0).to_expr(span)),
        }
    }

    pub fn decrement(name: Name) -> Self {
        let span = name.span();