lamm 0.1.0

a simple, functional paradigm programming language which uses Polish notation
Documentation 
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mod tokenizer;
mod parser;
mod executor;

use std::fmt::Display;
use std::io::BufRead;

#[derive(Clone, Debug)]
pub enum Type {
    Float,
    Int,
    Bool,
    String,
    Nil,
    Any,
    _Function(Box<Type>, Vec<Type>),
}

impl Display for Type {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", match self {
            Self::Float => "Float".into(),
            Self::Int => "Int".into(),
            Self::Bool => "Bool".into(),
            Self::String => "String".into(),
            Self::Nil => "Nil".into(),
            Self::Any => "Any".into(),
            Self::_Function(r, _) => format!("Function -> {}", *r)
        })
    }
}

/// Represents the result of executing a ParseTree with an Executor
#[derive(Clone, Debug, PartialEq)]
pub enum Value {
    Float(f64),
    Int(i64),
    Bool(bool),
    String(String),
    Nil,
}

impl Value {
    pub(crate) fn get_type(&self) -> Type {
        match self {
            Self::Float(_) => Type::Float,
            Self::Int(_) => Type::Int,
            Self::Bool(_) => Type::Bool,
            Self::String(_) => Type::String,
            Self::Nil => Type::Nil,
        }
    }
}

impl Display for Value {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::Float(x) => write!(f, "{x}"),
            Self::Int(x) => write!(f, "{x}"),
            Self::Bool(x) => write!(f, "{}", if *x { "true" } else { "false" }),
            Self::String(x) => write!(f, "{x}"),
            Self::Nil => write!(f, "nil"),
        }
    }
}

#[derive(Clone, Debug)]
pub(crate) struct FunctionDeclaration {
    _name: String,
    _r: Type,
    args: Vec<(String, Type)>,
}

pub fn evaluate<R: BufRead>(r: R) -> impl Iterator<Item = Result<Value, executor::RuntimeError>> {
    executor::Executor::new(parser::Parser::new(tokenizer::Tokenizer::new(r)))
}