inktree 0.1.0

An incremental syntax tree engine for fast, expressive language tooling in Rust
Documentation 
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use snafu::ResultExt;
use syn::{Ident, Meta, MetaList, MetaNameValue, Path};

use crate::language::{ElementError, MetaSnafu};

pub trait FromMeta: Sized {
    fn from_meta(meta: &Meta, name: Option<&Ident>) -> Result<Self, ElementError> {
        match meta {
            Meta::Path(path) => Self::from_path(path, name),
            Meta::List(meta_list) => Self::from_list(meta_list, name),
            Meta::NameValue(meta_name_value) => Self::from_name_value(meta_name_value, name),
        }
    }

    fn from_list(list: &MetaList, _: Option<&Ident>) -> Result<Self, ElementError> {
        Err(syn::Error::new_spanned(
            list,
            "from_meta list not supported for this thing todo",
        ))
        .context(MetaSnafu)?
    }

    fn from_path(path: &Path, _: Option<&Ident>) -> Result<Self, ElementError> {
        Err(syn::Error::new_spanned(
            path,
            "from_meta path not supported for this thing todo",
        ))
        .context(MetaSnafu)?
    }
    fn from_name_value(
        name_value: &MetaNameValue,
        _: Option<&Ident>,
    ) -> Result<Self, ElementError> {
        Err(syn::Error::new_spanned(
            name_value,
            "from_meta name_value not supported for this thing todo",
        ))
        .context(MetaSnafu)?
    }
}