pyisheval 0.1.0

A Python-like expression evaluator in Rust
Documentation 
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use std::fmt;

#[derive(Debug, Clone, PartialEq)]
pub enum Expr {
    Number(f64),
    Var(String),
    BinaryOp {
        op: BinOp,
        left: Box<Expr>,
        right: Box<Expr>,
    },
    Assign {
        name: String,
        expr: Box<Expr>,
    },
    Lambda {
        param: String,
        body: Box<Expr>,
    },
    Call {
        func: Box<Expr>,
        args: Vec<Expr>,
    },
}

#[derive(Debug, Clone, PartialEq)]
pub enum BinOp {
    Add,
    Sub,
    Mul,
    Div,
}

impl fmt::Display for BinOp {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            BinOp::Add => write!(f, "+"),
            BinOp::Sub => write!(f, "-"),
            BinOp::Mul => write!(f, "*"),
            BinOp::Div => write!(f, "/"),
        }
    }
}