From 2d1a6b2d432408d74eb57e0bda3f7434617e1070 Mon Sep 17 00:00:00 2001 From: HampusM Date: Wed, 20 Jul 2022 14:29:45 +0200 Subject: refactor: reorganize folder hierarchy --- macros/Cargo.toml | 19 ++ macros/src/declare_interface_args.rs | 23 +++ macros/src/factory_type_alias.rs | 84 ++++++++ macros/src/injectable_impl.rs | 245 +++++++++++++++++++++++ macros/src/injectable_macro_args.rs | 17 ++ macros/src/lib.rs | 96 +++++++++ macros/src/libs/intertrait_macros/LICENSE-APACHE | 176 ++++++++++++++++ macros/src/libs/intertrait_macros/LICENSE-MIT | 17 ++ macros/src/libs/intertrait_macros/gen_caster.rs | 55 +++++ macros/src/libs/intertrait_macros/mod.rs | 14 ++ macros/src/libs/mod.rs | 1 + 11 files changed, 747 insertions(+) create mode 100644 macros/Cargo.toml create mode 100644 macros/src/declare_interface_args.rs create mode 100644 macros/src/factory_type_alias.rs create mode 100644 macros/src/injectable_impl.rs create mode 100644 macros/src/injectable_macro_args.rs create mode 100644 macros/src/lib.rs create mode 100644 macros/src/libs/intertrait_macros/LICENSE-APACHE create mode 100644 macros/src/libs/intertrait_macros/LICENSE-MIT create mode 100644 macros/src/libs/intertrait_macros/gen_caster.rs create mode 100644 macros/src/libs/intertrait_macros/mod.rs create mode 100644 macros/src/libs/mod.rs (limited to 'macros') diff --git a/macros/Cargo.toml b/macros/Cargo.toml new file mode 100644 index 0000000..74b4f91 --- /dev/null +++ b/macros/Cargo.toml @@ -0,0 +1,19 @@ +[package] +name = "syrette_macros" +version = "0.1.0" +license = "LGPL-2.1" +authors = ["HampusM "] +description = "Macros for Syrette, the convenient dependency injection library" +repository = "https://git.hampusmat.com/syrette" +keywords = ["DI", "dependency-injection", "ioc", "inversion-of-control"] +edition = "2021" + +[lib] +proc_macro = true + +[dependencies] +syn = { version = "1.0.96", features = ["full"] } +quote = "1.0.18" +proc-macro2 = "1.0.40" +uuid = { version = "0.8", features = ["v4"] } + diff --git a/macros/src/declare_interface_args.rs b/macros/src/declare_interface_args.rs new file mode 100644 index 0000000..b54f458 --- /dev/null +++ b/macros/src/declare_interface_args.rs @@ -0,0 +1,23 @@ +use syn::parse::{Parse, ParseStream, Result}; +use syn::{Path, Token, Type}; + +pub struct DeclareInterfaceArgs +{ + pub implementation: Type, + pub interface: Path, +} + +impl Parse for DeclareInterfaceArgs +{ + fn parse(input: ParseStream) -> Result + { + let implementation: Type = input.parse()?; + + input.parse::]>()?; + + Ok(Self { + implementation, + interface: input.parse()?, + }) + } +} diff --git a/macros/src/factory_type_alias.rs b/macros/src/factory_type_alias.rs new file mode 100644 index 0000000..8ea7baa --- /dev/null +++ b/macros/src/factory_type_alias.rs @@ -0,0 +1,84 @@ +use syn::parse::{Parse, ParseStream}; +use syn::{GenericArgument, ItemType, Path, Type, TypeParamBound, TypeTuple}; + +pub struct FactoryTypeAlias +{ + pub type_alias: ItemType, + pub factory_interface: Path, + pub arg_types: TypeTuple, + pub return_type: Type, +} + +impl Parse for FactoryTypeAlias +{ + #[allow(clippy::match_wildcard_for_single_variants)] + fn parse(input: ParseStream) -> syn::Result + { + let type_alias = match input.parse::() { + Ok(type_alias) => Ok(type_alias), + Err(_) => Err(input.error("Expected a type alias")), + }?; + + let aliased_trait = match &type_alias.ty.as_ref() { + Type::TraitObject(alias_type) => Ok(alias_type), + &_ => Err(input.error("Expected the aliased type to be a trait")), + }?; + + if aliased_trait.bounds.len() != 1 { + return Err(input.error("Expected the aliased trait to have a single bound.")); + } + + let bound_path = &match aliased_trait.bounds.first().unwrap() { + TypeParamBound::Trait(trait_bound) => Ok(trait_bound), + &_ => { + Err(input.error("Expected the bound of the aliased trait to be a trait")) + } + }? + .path; + + if bound_path.segments.is_empty() + || bound_path.segments.last().unwrap().ident != "IFactory" + { + return Err(input + .error("Expected the bound of the aliased trait to be 'dyn IFactory'")); + } + + let angle_bracketed_args = match &bound_path.segments.last().unwrap().arguments { + syn::PathArguments::AngleBracketed(angle_bracketed_args) => { + Ok(angle_bracketed_args) + } + &_ => { + Err(input.error("Expected angle bracketed arguments for 'dyn IFactory'")) + } + }?; + + let arg_types = match &angle_bracketed_args.args[0] { + GenericArgument::Type(arg_types_type) => match arg_types_type { + Type::Tuple(arg_types) => Ok(arg_types), + &_ => Err(input.error(concat!( + "Expected the first angle bracketed argument ", + "of 'dyn IFactory' to be a type tuple" + ))), + }, + &_ => Err(input.error(concat!( + "Expected the first angle bracketed argument ", + "of 'dyn IFactory' to be a type" + ))), + }?; + + let return_type = match &angle_bracketed_args.args[1] { + GenericArgument::Type(arg_type) => Ok(arg_type), + &_ => Err(input.error(concat!( + "Expected the second angle bracketed argument ", + "of 'dyn IFactory' to be a type" + ))), + }?; + + Ok(Self { + type_alias: type_alias.clone(), + factory_interface: bound_path.clone(), + arg_types: arg_types.clone(), + return_type: return_type.clone(), + }) + } +} diff --git a/macros/src/injectable_impl.rs b/macros/src/injectable_impl.rs new file mode 100644 index 0000000..3000253 --- /dev/null +++ b/macros/src/injectable_impl.rs @@ -0,0 +1,245 @@ +use quote::{quote, ToTokens}; +use syn::parse::{Parse, ParseStream}; +use syn::{ + parse_str, punctuated::Punctuated, token::Comma, ExprMethodCall, FnArg, + GenericArgument, Ident, ImplItem, ImplItemMethod, ItemImpl, Path, PathArguments, + Type, TypePath, +}; + +const DI_CONTAINER_VAR_NAME: &str = "di_container"; + +pub struct InjectableImpl +{ + pub dependency_types: Vec, + pub self_type: Type, + pub original_impl: ItemImpl, +} + +impl Parse for InjectableImpl +{ + fn parse(input: ParseStream) -> syn::Result + { + match input.parse::() { + Ok(impl_parsed_input) => { + match Self::_get_dependency_types(&impl_parsed_input) { + Ok(dependency_types) => Ok(Self { + dependency_types, + self_type: impl_parsed_input.self_ty.as_ref().clone(), + original_impl: impl_parsed_input, + }), + Err(error_msg) => Err(input.error(error_msg)), + } + } + Err(_) => Err(input.error("Expected an impl")), + } + } +} + +impl InjectableImpl +{ + pub fn expand(&self) -> proc_macro2::TokenStream + { + let original_impl = &self.original_impl; + let self_type = &self.self_type; + + let di_container_var: Ident = parse_str(DI_CONTAINER_VAR_NAME).unwrap(); + + let get_dependencies = Self::_create_get_dependencies(&self.dependency_types); + + quote! { + #original_impl + + impl syrette::interfaces::injectable::Injectable for #self_type { + fn resolve( + #di_container_var: &syrette::DIContainer + ) -> error_stack::Result< + syrette::ptr::InterfacePtr, + syrette::errors::injectable::ResolveError> + { + use error_stack::ResultExt; + + return Ok(syrette::ptr::InterfacePtr::new(Self::new( + #(#get_dependencies + .change_context(syrette::errors::injectable::ResolveError) + .attach_printable( + format!( + "Unable to resolve a dependency of {}", + std::any::type_name::<#self_type>() + ) + )? + ),* + ))); + } + } + } + } + + fn _create_get_dependencies(dependency_types: &[Type]) -> Vec + { + dependency_types + .iter() + .filter_map(|dep_type| match dep_type { + Type::TraitObject(dep_type_trait) => Some( + parse_str( + format!( + "{}.get::<{}>()", + DI_CONTAINER_VAR_NAME, + dep_type_trait.to_token_stream() + ) + .as_str(), + ) + .unwrap(), + ), + Type::Path(dep_type_path) => { + let dep_type_path_str = Self::_path_to_string(&dep_type_path.path); + + let get_method_name = if dep_type_path_str.ends_with("Factory") { + "get_factory" + } else { + "get" + }; + + Some( + parse_str( + format!( + "{}.{}::<{}>()", + DI_CONTAINER_VAR_NAME, get_method_name, dep_type_path_str + ) + .as_str(), + ) + .unwrap(), + ) + } + &_ => None, + }) + .collect() + } + + fn _find_method_by_name<'impl_lt>( + item_impl: &'impl_lt ItemImpl, + method_name: &'static str, + ) -> Option<&'impl_lt ImplItemMethod> + { + let impl_items = &item_impl.items; + + impl_items + .iter() + .filter_map(|impl_item| match impl_item { + ImplItem::Method(method_item) => Some(method_item), + &_ => None, + }) + .find(|method_item| method_item.sig.ident == method_name) + } + + #[allow(clippy::match_wildcard_for_single_variants)] + fn get_has_fn_args_self(fn_args: &Punctuated) -> bool + { + fn_args.iter().any(|arg| match arg { + FnArg::Receiver(_) => true, + &_ => false, + }) + } + + fn _get_fn_arg_type_paths(fn_args: &Punctuated) -> Vec<&TypePath> + { + fn_args + .iter() + .filter_map(|arg| match arg { + FnArg::Typed(typed_fn_arg) => match typed_fn_arg.ty.as_ref() { + Type::Path(arg_type_path) => Some(arg_type_path), + Type::Reference(ref_type_path) => match ref_type_path.elem.as_ref() { + Type::Path(arg_type_path) => Some(arg_type_path), + &_ => None, + }, + &_ => None, + }, + FnArg::Receiver(_receiver_fn_arg) => None, + }) + .collect() + } + + fn _path_to_string(path: &Path) -> String + { + path.segments + .pairs() + .fold(String::new(), |mut acc, segment_pair| { + let segment_ident = &segment_pair.value().ident; + + acc.push_str(segment_ident.to_string().as_str()); + + let opt_colon_two = segment_pair.punct(); + + match opt_colon_two { + Some(colon_two) => { + acc.push_str(colon_two.to_token_stream().to_string().as_str()); + } + None => {} + } + + acc + }) + } + + fn _is_type_path_ptr(type_path: &TypePath) -> bool + { + let arg_type_path_string = Self::_path_to_string(&type_path.path); + + arg_type_path_string == "InterfacePtr" + || arg_type_path_string == "ptr::InterfacePtr" + || arg_type_path_string == "syrrete::ptr::InterfacePtr" + || arg_type_path_string == "FactoryPtr" + || arg_type_path_string == "ptr::FactoryPtr" + || arg_type_path_string == "syrrete::ptr::FactoryPtr" + } + + fn _get_dependency_types(item_impl: &ItemImpl) -> Result, &'static str> + { + let new_method_impl_item = match Self::_find_method_by_name(item_impl, "new") { + Some(method_item) => Ok(method_item), + None => Err("Missing a 'new' method"), + }?; + + let new_method_args = &new_method_impl_item.sig.inputs; + + if Self::get_has_fn_args_self(new_method_args) { + return Err("Unexpected self argument in 'new' method"); + } + + let new_method_arg_type_paths = Self::_get_fn_arg_type_paths(new_method_args); + + if new_method_arg_type_paths + .iter() + .any(|arg_type_path| !Self::_is_type_path_ptr(arg_type_path)) + { + return Err("All argument types in 'new' method must ptr types"); + } + + Ok(new_method_arg_type_paths + .iter() + .filter_map(|arg_type_path| { + // Assume the type path has a last segment. + let last_path_segment = arg_type_path.path.segments.last().unwrap(); + + match &last_path_segment.arguments { + PathArguments::AngleBracketed(angle_bracketed_generic_args) => { + let generic_args = &angle_bracketed_generic_args.args; + + let opt_first_generic_arg = generic_args.first(); + + // Assume a first generic argument exists because InterfacePtr and + // FactoryPtr requires one + let first_generic_arg = opt_first_generic_arg.as_ref().unwrap(); + + match first_generic_arg { + GenericArgument::Type(first_generic_arg_type) => { + Some(first_generic_arg_type.clone()) + } + &_ => None, + } + } + &_ => None, + } + }) + .collect()) + } +} diff --git a/macros/src/injectable_macro_args.rs b/macros/src/injectable_macro_args.rs new file mode 100644 index 0000000..4ef4389 --- /dev/null +++ b/macros/src/injectable_macro_args.rs @@ -0,0 +1,17 @@ +use syn::parse::{Parse, ParseStream}; +use syn::TypePath; + +pub struct InjectableMacroArgs +{ + pub interface: TypePath, +} + +impl Parse for InjectableMacroArgs +{ + fn parse(input: ParseStream) -> syn::Result + { + Ok(Self { + interface: input.parse()?, + }) + } +} diff --git a/macros/src/lib.rs b/macros/src/lib.rs new file mode 100644 index 0000000..ed1a509 --- /dev/null +++ b/macros/src/lib.rs @@ -0,0 +1,96 @@ +#![deny(clippy::all)] +#![deny(clippy::pedantic)] + +use proc_macro::TokenStream; +use quote::quote; +use syn::{parse, parse_macro_input}; + +mod declare_interface_args; +mod factory_type_alias; +mod injectable_impl; +mod injectable_macro_args; +mod libs; + +use declare_interface_args::DeclareInterfaceArgs; +use factory_type_alias::FactoryTypeAlias; +use injectable_impl::InjectableImpl; +use injectable_macro_args::InjectableMacroArgs; +use libs::intertrait_macros::gen_caster::generate_caster; + +/// Makes a struct injectable. Thereby usable with `DIContainer`. +/// +/// # Arguments +/// * A interface trait the struct implements. +/// +/// # Panics +/// If the attributed item is not a impl. +#[proc_macro_attribute] +pub fn injectable(args_stream: TokenStream, impl_stream: TokenStream) -> TokenStream +{ + let InjectableMacroArgs { + interface: interface_type_path, + } = parse_macro_input!(args_stream); + + let injectable_impl: InjectableImpl = parse(impl_stream).unwrap(); + + let expanded_injectable_impl = injectable_impl.expand(); + + let self_type = &injectable_impl.self_type; + + quote! { + #expanded_injectable_impl + + syrette::declare_interface!(#self_type -> #interface_type_path); + } + .into() +} + +/// Makes a type alias usable as a factory interface. +/// +/// # Panics +/// If the attributed item is not a type alias. +#[proc_macro_attribute] +pub fn factory(_: TokenStream, type_alias_stream: TokenStream) -> TokenStream +{ + let FactoryTypeAlias { + type_alias, + factory_interface, + arg_types, + return_type, + } = parse(type_alias_stream).unwrap(); + + quote! { + #type_alias + + syrette::declare_interface!( + syrette::castable_factory::CastableFactory< + #arg_types, + #return_type + > -> #factory_interface + ); + + syrette::declare_interface!( + syrette::castable_factory::CastableFactory< + #arg_types, + #return_type + > -> syrette::castable_factory::AnyFactory + ); + } + .into() +} + +/// Declares the interface trait of a implementation. +/// +/// # Arguments +/// {Implementation} -> {Interface} +/// +#[proc_macro] +pub fn declare_interface(input: TokenStream) -> TokenStream +{ + let DeclareInterfaceArgs { + implementation, + interface, + } = parse_macro_input!(input); + + generate_caster(&implementation, &interface).into() +} diff --git a/macros/src/libs/intertrait_macros/LICENSE-APACHE b/macros/src/libs/intertrait_macros/LICENSE-APACHE new file mode 100644 index 0000000..d9a10c0 --- /dev/null +++ b/macros/src/libs/intertrait_macros/LICENSE-APACHE @@ -0,0 +1,176 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. For the purposes of this definition, + "control" means (i) the power, direct or indirect, to cause the + direction or management of such entity, whether by contract or + otherwise, or (ii) ownership of fifty percent (50%) or more of the + outstanding shares, or (iii) beneficial ownership of such entity. + + "You" (or "Your") shall mean an individual or Legal Entity + exercising permissions granted by this License. + + "Source" form shall mean the preferred form for making modifications, + including but not limited to software source code, documentation + source, and configuration files. + + "Object" form shall mean any form resulting from mechanical + transformation or translation of a Source form, including but + not limited to compiled object code, generated documentation, + and conversions to other media types. + + "Work" shall mean the work of authorship, whether in Source or + Object form, made available under the License, as indicated by a + copyright notice that is included in or attached to the work + (an example is provided in the Appendix below). + + "Derivative Works" shall mean any work, whether in Source or Object + form, that is based on (or derived from) the Work and for which the + editorial revisions, annotations, elaborations, or other modifications + represent, as a whole, an original work of authorship. For the purposes + of this License, Derivative Works shall not include works that remain + separable from, or merely link (or bind by name) to the interfaces of, + the Work and Derivative Works thereof. + + "Contribution" shall mean any work of authorship, including + the original version of the Work and any modifications or additions + to that Work or Derivative Works thereof, that is intentionally + submitted to Licensor for inclusion in the Work by the copyright owner + or by an individual or Legal Entity authorized to submit on behalf of + the copyright owner. For the purposes of this definition, "submitted" + means any form of electronic, verbal, or written communication sent + to the Licensor or its representatives, including but not limited to + communication on electronic mailing lists, source code control systems, + and issue tracking systems that are managed by, or on behalf of, the + Licensor for the purpose of discussing and improving the Work, but + excluding communication that is conspicuously marked or otherwise + designated in writing by the copyright owner as "Not a Contribution." + + "Contributor" shall mean Licensor and any individual or Legal Entity + on behalf of whom a Contribution has been received by Licensor and + subsequently incorporated within the Work. + + 2. Grant of Copyright License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + copyright license to reproduce, prepare Derivative Works of, + publicly display, publicly perform, sublicense, and distribute the + Work and such Derivative Works in Source or Object form. + + 3. Grant of Patent License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + (except as stated in this section) patent license to make, have made, + use, offer to sell, sell, import, and otherwise transfer the Work, + where such license applies only to those patent claims licensable + by such Contributor that are necessarily infringed by their + Contribution(s) alone or by combination of their Contribution(s) + with the Work to which such Contribution(s) was submitted. If You + institute patent litigation against any entity (including a + cross-claim or counterclaim in a lawsuit) alleging that the Work + or a Contribution incorporated within the Work constitutes direct + or contributory patent infringement, then any patent licenses + granted to You under this License for that Work shall terminate + as of the date such litigation is filed. + + 4. Redistribution. You may reproduce and distribute copies of the + Work or Derivative Works thereof in any medium, with or without + modifications, and in Source or Object form, provided that You + meet the following conditions: + + (a) You must give any other recipients of the Work or + Derivative Works a copy of this License; and + + (b) You must cause any modified files to carry prominent notices + stating that You changed the files; and + + (c) You must retain, in the Source form of any Derivative Works + that You distribute, all copyright, patent, trademark, and + attribution notices from the Source form of the Work, + excluding those notices that do not pertain to any part of + the Derivative Works; and + + (d) If the Work includes a "NOTICE" text file as part of its + distribution, then any Derivative Works that You distribute must + include a readable copy of the attribution notices contained + within such NOTICE file, excluding those notices that do not + pertain to any part of the Derivative Works, in at least one + of the following places: within a NOTICE text file distributed + as part of the Derivative Works; within the Source form or + documentation, if provided along with the Derivative Works; or, + within a display generated by the Derivative Works, if and + wherever such third-party notices normally appear. The contents + of the NOTICE file are for informational purposes only and + do not modify the License. You may add Your own attribution + notices within Derivative Works that You distribute, alongside + or as an addendum to the NOTICE text from the Work, provided + that such additional attribution notices cannot be construed + as modifying the License. + + You may add Your own copyright statement to Your modifications and + may provide additional or different license terms and conditions + for use, reproduction, or distribution of Your modifications, or + for any such Derivative Works as a whole, provided Your use, + reproduction, and distribution of the Work otherwise complies with + the conditions stated in this License. + + 5. Submission of Contributions. Unless You explicitly state otherwise, + any Contribution intentionally submitted for inclusion in the Work + by You to the Licensor shall be under the terms and conditions of + this License, without any additional terms or conditions. + Notwithstanding the above, nothing herein shall supersede or modify + the terms of any separate license agreement you may have executed + with Licensor regarding such Contributions. + + 6. Trademarks. This License does not grant permission to use the trade + names, trademarks, service marks, or product names of the Licensor, + except as required for reasonable and customary use in describing the + origin of the Work and reproducing the content of the NOTICE file. + + 7. Disclaimer of Warranty. Unless required by applicable law or + agreed to in writing, Licensor provides the Work (and each + Contributor provides its Contributions) on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied, including, without limitation, any warranties or conditions + of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A + PARTICULAR PURPOSE. You are solely responsible for determining the + appropriateness of using or redistributing the Work and assume any + risks associated with Your exercise of permissions under this License. + + 8. Limitation of Liability. In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS diff --git a/macros/src/libs/intertrait_macros/LICENSE-MIT b/macros/src/libs/intertrait_macros/LICENSE-MIT new file mode 100644 index 0000000..969d061 --- /dev/null +++ b/macros/src/libs/intertrait_macros/LICENSE-MIT @@ -0,0 +1,17 @@ +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/macros/src/libs/intertrait_macros/gen_caster.rs b/macros/src/libs/intertrait_macros/gen_caster.rs new file mode 100644 index 0000000..9126200 --- /dev/null +++ b/macros/src/libs/intertrait_macros/gen_caster.rs @@ -0,0 +1,55 @@ +/** + * Originally from Intertrait by CodeChain + * + * + * + * + * Licensed under either of + * + * Apache License, Version 2.0 (LICENSE-APACHE or ) + * MIT license (LICENSE-MIT or ) + + * 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::::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]) } +} diff --git a/macros/src/libs/intertrait_macros/mod.rs b/macros/src/libs/intertrait_macros/mod.rs new file mode 100644 index 0000000..fa8c021 --- /dev/null +++ b/macros/src/libs/intertrait_macros/mod.rs @@ -0,0 +1,14 @@ +/** + * Originally from Intertrait by CodeChain + * + * + * + * + * Licensed under either of + * + * Apache License, Version 2.0 (LICENSE-APACHE or ) + * MIT license (LICENSE-MIT or ) + + * at your option. +*/ +pub mod gen_caster; diff --git a/macros/src/libs/mod.rs b/macros/src/libs/mod.rs new file mode 100644 index 0000000..e4964de --- /dev/null +++ b/macros/src/libs/mod.rs @@ -0,0 +1 @@ +pub mod intertrait_macros; -- cgit v1.2.3-18-g5258