cainome-parser 0.6.0

A run-time library to generate an intermediate representation of Cairo ABI.
Documentation 
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//! This module provides a token type for the `Option` type.
//!
//! <https://github.com/starkware-libs/cairo/blob/main/corelib/src/option.cairo>
use crate::tokens::Token;
use crate::{CainomeResult, Error};

use super::composite::escape_rust_keywords;
use super::genericity;

#[derive(Debug, Clone, PartialEq)]
pub struct Option {
    pub type_path: String,
    pub inner: Box<Token>,
}

impl Option {
    pub fn parse(type_path: &str) -> CainomeResult<Self> {
        let type_path = escape_rust_keywords(type_path);

        if type_path.starts_with("core::option::Option") {
            let generic_args = genericity::extract_generics_args(&type_path)?;

            if generic_args.len() != 1 {
                return Err(Error::InvalidOptionTypePath(type_path.to_string()));
            }

            let (_, generic_arg_token) = &generic_args[0];

            Ok(Self {
                type_path: type_path.to_string(),
                inner: Box::new(generic_arg_token.clone()),
            })
        } else {
            Err(Error::TokenInitFailed(format!(
                "Option couldn't be initialized from `{}`.",
                type_path,
            )))
        }
    }

    pub fn apply_alias(&mut self, type_path: &str, alias: &str) {
        self.inner.apply_alias(type_path, alias);
    }
}