diff options
Diffstat (limited to 'syrette_macros/src/libs/intertrait_macros/gen_caster.rs')
-rw-r--r-- | syrette_macros/src/libs/intertrait_macros/gen_caster.rs | 55 |
1 files changed, 0 insertions, 55 deletions
diff --git a/syrette_macros/src/libs/intertrait_macros/gen_caster.rs b/syrette_macros/src/libs/intertrait_macros/gen_caster.rs deleted file mode 100644 index 9126200..0000000 --- a/syrette_macros/src/libs/intertrait_macros/gen_caster.rs +++ /dev/null @@ -1,55 +0,0 @@ -/** - * Originally from Intertrait by CodeChain - * - * <https://github.com/CodeChain-io/intertrait> - * <https://crates.io/crates/intertrait/0.2.2> - * - * Licensed under either of - * - * Apache License, Version 2.0 (LICENSE-APACHE or <http://www.apache.org/licenses/LICENSE-2.0>) - * MIT license (LICENSE-MIT or <http://opensource.org/licenses/MIT>) - - * at your option. -*/ -use std::str::from_utf8_unchecked; - -use proc_macro2::TokenStream; -use quote::format_ident; -use quote::quote; -use quote::ToTokens; -use uuid::adapter::Simple; -use uuid::Uuid; - -pub fn generate_caster(ty: &impl ToTokens, trait_: &impl ToTokens) -> TokenStream -{ - let mut fn_buf = [0u8; FN_BUF_LEN]; - - let fn_ident = format_ident!("{}", new_fn_name(&mut fn_buf)); - - let new_caster = quote! { - syrette::libs::intertrait::Caster::<dyn #trait_>::new( - |from| from.downcast::<#ty>().unwrap(), - |from| from.downcast::<#ty>().unwrap(), - ) - }; - - quote! { - #[syrette::libs::linkme::distributed_slice(syrette::libs::intertrait::CASTERS)] - #[linkme(crate = syrette::libs::linkme)] - fn #fn_ident() -> (::std::any::TypeId, syrette::libs::intertrait::BoxedCaster) { - (::std::any::TypeId::of::<#ty>(), Box::new(#new_caster)) - } - } -} - -const FN_PREFIX: &[u8] = b"__"; -const FN_BUF_LEN: usize = FN_PREFIX.len() + Simple::LENGTH; - -fn new_fn_name(buf: &mut [u8]) -> &str -{ - buf[..FN_PREFIX.len()].copy_from_slice(FN_PREFIX); - Uuid::new_v4() - .to_simple() - .encode_lower(&mut buf[FN_PREFIX.len()..]); - unsafe { from_utf8_unchecked(&buf[..FN_BUF_LEN]) } -} |