typr-core 0.5.2

Core type checking and transpilation logic for TypR - a typed superset of R
Documentation 
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use crate::components::error_message::help_data::HelpData;
use crate::components::language::operators::Op;
use crate::components::language::Lang;
use crate::processes::parsing::operation_priority::PriorityToken;
use crate::processes::parsing::operation_priority::TokenKind;
use std::fmt;

#[derive(Debug, Default, Clone, PartialEq)]
pub enum LangToken {
    Operator(Op),
    Expression(Lang),
    #[default]
    EmptyOperator,
}

impl LangToken {
    pub fn get_help_data(&self) -> HelpData {
        match self {
            LangToken::Operator(op) => op.get_help_data(),
            LangToken::Expression(exp) => exp.get_help_data(),
            LangToken::EmptyOperator => HelpData::default(),
        }
    }
}

impl From<Lang> for LangToken {
    fn from(val: Lang) -> Self {
        LangToken::Expression(val)
    }
}

impl From<Op> for LangToken {
    fn from(val: Op) -> Self {
        LangToken::Operator(val)
    }
}

impl From<TokenKind> for LangToken {
    fn from(_: TokenKind) -> Self {
        LangToken::EmptyOperator
    }
}

impl fmt::Display for LangToken {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let res = match self {
            LangToken::Expression(exp) => format!("{}", exp),
            LangToken::Operator(exp) => format!("{}", exp),
            _ => "?".to_string(),
        };
        write!(f, "{}", res)
    }
}

impl PriorityToken for LangToken {
    fn get_token_type(&self) -> TokenKind {
        match self {
            LangToken::Operator(op) => op.get_token_type(),
            LangToken::Expression(exp) => exp.get_token_type(),
            LangToken::EmptyOperator => TokenKind::Operator,
        }
    }

    fn get_binding_power(&self) -> i32 {
        match self {
            LangToken::Operator(op) => op.get_binding_power(),
            LangToken::Expression(exp) => exp.get_binding_power(),
            LangToken::EmptyOperator => -1,
        }
    }

    fn combine(self, left: LangToken, right: LangToken) -> Self {
        match (self.clone(), left.clone(), right.clone()) {
            (LangToken::Operator(op), LangToken::Expression(exp1), LangToken::Expression(exp2)) => {
                LangToken::Expression(op.combine(exp1, exp2))
            }
            _ => panic!("Should be (op exp1 exp2) not ({} {} {})", self, left, right),
        }
    }
}