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|
#![deny(clippy::all)]
#![deny(clippy::pedantic)]
#![deny(missing_docs)]
//! Macros for the [Syrette](https://crates.io/crates/syrette) crate.
use proc_macro::TokenStream;
use quote::quote;
use syn::{parse, parse_macro_input};
mod declare_interface_args;
mod dependency_type;
mod factory_type_alias;
mod injectable_impl;
mod injectable_macro_args;
mod libs;
mod util;
use declare_interface_args::DeclareInterfaceArgs;
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
/// * (Optional) A interface trait the struct implements.
/// * (Zero or more) Flags wrapped in curly braces. Like `{ a = true, b = false }`
///
/// # Flags
/// - `no_doc_hidden` - Don't hide the impl of the [`Injectable`] trait from documentation.
///
/// # Panics
/// If the attributed item is not a impl.
///
/// # Important
/// If the interface trait argument is excluded, you should either manually
/// declare the interface with the [`declare_interface!`] macro or use
/// the [`di_container_bind`] macro to create a DI container binding.
///
/// # Example
/// ```
/// use syrette::injectable;
///
/// struct PasswordManager {}
///
/// #[injectable]
/// impl PasswordManager {
/// pub fn new() -> Self {
/// Self {}
/// }
/// }
/// ```
///
/// [`DIContainer`]: ../syrette/di_container/struct.DIContainer.html
/// [`Injectable`]: ../syrette/interfaces/injectable/trait.Injectable.html
/// [`di_container_bind`]: ../syrette/macro.di_container_bind.html
#[proc_macro_attribute]
pub fn injectable(args_stream: TokenStream, impl_stream: TokenStream) -> TokenStream
{
let InjectableMacroArgs { interface, flags } = parse_macro_input!(args_stream);
let mut flags_iter = flags.iter();
let no_doc_hidden = flags_iter
.find(|flag| flag.flag.to_string().as_str() == "no_doc_hidden")
.map_or(false, |flag| flag.is_on.value);
let injectable_impl: InjectableImpl = parse(impl_stream).unwrap();
let expanded_injectable_impl = injectable_impl.expand(no_doc_hidden);
let maybe_decl_interface = if interface.is_some() {
let self_type = &injectable_impl.self_type;
quote! {
syrette::declare_interface!(#self_type -> #interface);
}
} else {
quote! {}
};
quote! {
#expanded_injectable_impl
#maybe_decl_interface
}
.into()
}
/// Makes a type alias usable as a factory interface.
///
/// *This macro is only available if Syrette is built with the "factory" feature.*
///
/// # Panics
/// If the attributed item is not a type alias.
///
/// # Examples
/// ```
/// use std::collections::HashMap;
///
/// use syrette::interfaces::factory::IFactory;
/// use syrette::factory;
///
/// enum ConfigValue
/// {
/// String(String),
/// Bool(bool),
/// Int(i32),
/// None,
/// }
///
/// trait IConfigurator
/// {
/// fn configure(&self, key: String, value: ConfigValue);
/// }
///
/// struct Configurator {
/// config: HashMap<String, ConfigValue>,
/// }
///
/// impl Configurator
/// {
/// fn new(keys: Vec<String>) -> Self
/// {
/// Self {
/// config: HashMap::from(
/// keys
/// .iter()
/// .map(|key| (key.clone(), ConfigValue::None))
/// .collect::<HashMap<_, _>>()
/// )
/// }
/// }
/// }
///
/// impl IConfigurator for Configurator
/// {
/// fn configure(&self, key: String, value: ConfigValue)
/// {
/// // ...
/// }
/// }
///
/// #[factory]
/// type IConfiguratorFactory = dyn IFactory<(Vec<String>,), dyn IConfigurator>;
/// ```
#[proc_macro_attribute]
#[cfg(feature = "factory")]
pub fn factory(_: TokenStream, type_alias_stream: TokenStream) -> TokenStream
{
let factory_type_alias::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::interfaces::any_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()
}
|
