diff options
Diffstat (limited to 'macros/src')
| -rw-r--r-- | macros/src/declare_interface_args.rs | 23 | ||||
| -rw-r--r-- | macros/src/factory_type_alias.rs | 84 | ||||
| -rw-r--r-- | macros/src/injectable_impl.rs | 245 | ||||
| -rw-r--r-- | macros/src/injectable_macro_args.rs | 17 | ||||
| -rw-r--r-- | macros/src/lib.rs | 96 | ||||
| -rw-r--r-- | macros/src/libs/intertrait_macros/LICENSE-APACHE | 176 | ||||
| -rw-r--r-- | macros/src/libs/intertrait_macros/LICENSE-MIT | 17 | ||||
| -rw-r--r-- | macros/src/libs/intertrait_macros/gen_caster.rs | 55 | ||||
| -rw-r--r-- | macros/src/libs/intertrait_macros/mod.rs | 14 | ||||
| -rw-r--r-- | macros/src/libs/mod.rs | 1 |
10 files changed, 728 insertions, 0 deletions
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<Self> + { + let implementation: Type = input.parse()?; + + input.parse::<Token![->]>()?; + + 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<Self> + { + let type_alias = match input.parse::<ItemType>() { + 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<Type>, + pub self_type: Type, + pub original_impl: ItemImpl, +} + +impl Parse for InjectableImpl +{ + fn parse(input: ParseStream) -> syn::Result<Self> + { + match input.parse::<ItemImpl>() { + 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<Self>, + 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<ExprMethodCall> + { + 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<FnArg, Comma>) -> bool + { + fn_args.iter().any(|arg| match arg { + FnArg::Receiver(_) => true, + &_ => false, + }) + } + + fn _get_fn_arg_type_paths(fn_args: &Punctuated<FnArg, Comma>) -> 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<Vec<Type>, &'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<Self> + { + 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. 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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 + * + * <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]) } +} 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 + * + * <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. +*/ +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; |