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use proc_macro::TokenStream;
use quote::quote;
use syn::ItemFn;
use crate::common::{self, define::Expanded};
use super::args::RegisterMacroArgs;
pub(crate) fn expand(attrs: RegisterMacroArgs, input: ItemFn) -> TokenStream {
let RegisterMacroArgs { name, target } = attrs;
let Expanded {
name_str,
validator,
validator_name,
evaluator,
evaluator_name,
result,
core,
} = match common::define::expand(input, name) {
Ok(exp) => exp,
Err(err) => return err.into(),
};
TokenStream::from(quote! {
#validator
#evaluator
static #target: #core::Function = #core::Function::new(
#name_str,
#result::function_type(),
&#evaluator_name,
&#validator_name,
);
})
}
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