Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

[Merged by Bors] - fix bevy_ecs macro path handling #1426

Closed
wants to merge 1 commit into from
Closed

[Merged by Bors] - fix bevy_ecs macro path handling #1426

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
129 changes: 62 additions & 67 deletions crates/bevy_ecs/macros/src/lib.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,7 @@ extern crate proc_macro;

use std::borrow::Cow;

use find_crate::Manifest;
use find_crate::{Dependencies, Manifest};
use proc_macro::TokenStream;
use proc_macro2::{Span, TokenStream as TokenStream2};
use quote::quote;
Expand Down Expand Up @@ -54,27 +54,18 @@ fn derive_bundle_(input: DeriveInput) -> Result<TokenStream2> {
}
};
let (tys, field_members) = struct_fields(&data.fields);
let manifest = Manifest::new().unwrap();
let path_str = if let Some(package) = manifest.find(|name| name == "bevy") {
format!("{}::ecs", package.name)
} else if let Some(package) = manifest.find(|name| name == "bevy_internal") {
format!("{}::ecs", package.name)
} else if let Some(package) = manifest.find(|name| name == "bevy_ecs") {
package.name
} else {
"bevy_ecs".to_string()
};
let crate_path: Path = syn::parse(path_str.parse::<TokenStream>().unwrap()).unwrap();

let ecs_path = bevy_ecs_path();
let field_idents = member_as_idents(&field_members);
let generics = add_additional_bounds_to_generic_params(&crate_path, input.generics);
let generics = add_additional_bounds_to_generic_params(&ecs_path, input.generics);

let dyn_bundle_code =
gen_dynamic_bundle_impl(&crate_path, &ident, &generics, &field_members, &tys);
gen_dynamic_bundle_impl(&ecs_path, &ident, &generics, &field_members, &tys);
let bundle_code = if tys.is_empty() {
gen_unit_struct_bundle_impl(&crate_path, ident, &generics)
gen_unit_struct_bundle_impl(&ecs_path, ident, &generics)
} else {
gen_bundle_impl(
&crate_path,
&ecs_path,
&ident,
&generics,
&field_members,
Expand All @@ -88,21 +79,21 @@ fn derive_bundle_(input: DeriveInput) -> Result<TokenStream2> {
}

fn gen_dynamic_bundle_impl(
crate_path: &syn::Path,
ecs_path: &syn::Path,
ident: &syn::Ident,
generics: &syn::Generics,
field_members: &[syn::Member],
tys: &[&syn::Type],
) -> TokenStream2 {
let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
quote! {
impl #impl_generics ::#crate_path::DynamicBundle for #ident #ty_generics #where_clause {
impl #impl_generics ::#ecs_path::DynamicBundle for #ident #ty_generics #where_clause {
fn with_ids<__hecs__T>(&self, f: impl ::std::ops::FnOnce(&[::std::any::TypeId]) -> __hecs__T) -> __hecs__T {
<Self as ::#crate_path::Bundle>::with_static_ids(f)
<Self as ::#ecs_path::Bundle>::with_static_ids(f)
}

fn type_info(&self) -> ::std::vec::Vec<::#crate_path::TypeInfo> {
<Self as ::#crate_path::Bundle>::static_type_info()
fn type_info(&self) -> ::std::vec::Vec<::#ecs_path::TypeInfo> {
<Self as ::#ecs_path::Bundle>::static_type_info()
}

#[allow(clippy::forget_copy)]
Expand All @@ -119,7 +110,7 @@ fn gen_dynamic_bundle_impl(
}

fn gen_bundle_impl(
crate_path: &syn::Path,
ecs_path: &syn::Path,
ident: &syn::Ident,
generics: &syn::Generics,
field_members: &[syn::Member],
Expand All @@ -145,7 +136,7 @@ fn gen_bundle_impl(
};
let with_static_ids_body = if generics.params.is_empty() {
quote! {
::#crate_path::lazy_static::lazy_static! {
::#ecs_path::lazy_static::lazy_static! {
static ref ELEMENTS: [::std::any::TypeId; #num_tys] = {
#with_static_ids_inner
};
Expand All @@ -158,24 +149,24 @@ fn gen_bundle_impl(
}
};
quote! {
impl #impl_generics ::#crate_path::Bundle for #ident #ty_generics #where_clause {
impl #impl_generics ::#ecs_path::Bundle for #ident #ty_generics #where_clause {
#[allow(non_camel_case_types)]
fn with_static_ids<__hecs__T>(f: impl ::std::ops::FnOnce(&[::std::any::TypeId]) -> __hecs__T) -> __hecs__T {
#with_static_ids_body
}

fn static_type_info() -> ::std::vec::Vec<::#crate_path::TypeInfo> {
let mut info = ::std::vec![#(::#crate_path::TypeInfo::of::<#tys>()),*];
fn static_type_info() -> ::std::vec::Vec<::#ecs_path::TypeInfo> {
let mut info = ::std::vec![#(::#ecs_path::TypeInfo::of::<#tys>()),*];
info.sort_unstable();
info
}

unsafe fn get(
mut f: impl ::std::ops::FnMut(::std::any::TypeId, usize) -> ::std::option::Option<::std::ptr::NonNull<u8>>,
) -> ::std::result::Result<Self, ::#crate_path::MissingComponent> {
) -> ::std::result::Result<Self, ::#ecs_path::MissingComponent> {
#(
let #field_idents = f(::std::any::TypeId::of::<#tys>(), ::std::mem::size_of::<#tys>())
.ok_or_else(::#crate_path::MissingComponent::new::<#tys>)?
.ok_or_else(::#ecs_path::MissingComponent::new::<#tys>)?
.cast::<#tys>()
.as_ptr();
)*
Expand All @@ -187,44 +178,42 @@ fn gen_bundle_impl(

// no reason to generate a static for unit structs
fn gen_unit_struct_bundle_impl(
crate_path: &syn::Path,
ecs_path: &syn::Path,
ident: syn::Ident,
generics: &syn::Generics,
) -> TokenStream2 {
let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
quote! {
impl #impl_generics ::#crate_path::Bundle for #ident #ty_generics #where_clause {
impl #impl_generics ::#ecs_path::Bundle for #ident #ty_generics #where_clause {
#[allow(non_camel_case_types)]
fn with_static_ids<__hecs__T>(f: impl ::std::ops::FnOnce(&[::std::any::TypeId]) -> __hecs__T) -> __hecs__T { f(&[]) }
fn static_type_info() -> ::std::vec::Vec<::#crate_path::TypeInfo> { ::std::vec::Vec::new() }
fn static_type_info() -> ::std::vec::Vec<::#ecs_path::TypeInfo> { ::std::vec::Vec::new() }

unsafe fn get(
f: impl ::std::ops::FnMut(::std::any::TypeId, usize) -> ::std::option::Option<::std::ptr::NonNull<u8>>,
) -> Result<Self, ::#crate_path::MissingComponent> {
) -> Result<Self, ::#ecs_path::MissingComponent> {
Ok(Self {/* for some reason this works for all unit struct variations */})
}
}
}
}

fn make_component_trait_bound(crate_path: &syn::Path) -> syn::TraitBound {
fn make_component_trait_bound(ecs_path: &syn::Path) -> syn::TraitBound {
syn::TraitBound {
paren_token: None,
modifier: syn::TraitBoundModifier::None,
lifetimes: None,
path: syn::parse_quote!(::#crate_path::Component),
path: syn::parse_quote!(::#ecs_path::Component),
}
}

fn add_additional_bounds_to_generic_params(
crate_path: &syn::Path,
ecs: &syn::Path,
mut generics: syn::Generics,
) -> syn::Generics {
generics.type_params_mut().for_each(|tp| {
tp.bounds
.push(syn::TypeParamBound::Trait(make_component_trait_bound(
crate_path,
)))
.push(syn::TypeParamBound::Trait(make_component_trait_bound(ecs)))
});
generics
}
Expand Down Expand Up @@ -360,13 +349,7 @@ pub fn derive_system_param(input: TokenStream) -> TokenStream {
_ => panic!("Expected a struct with named fields."),
};

let manifest = Manifest::new().unwrap();
let path_str = if let Some(package) = manifest.find(|name| name == "bevy") {
format!("{}::ecs", package.name)
} else {
"bevy_ecs".to_string()
};
let path: Path = syn::parse(path_str.parse::<TokenStream>().unwrap()).unwrap();
let ecs_path = bevy_ecs_path();

let field_attributes = fields
.iter()
Expand Down Expand Up @@ -443,23 +426,23 @@ pub fn derive_system_param(input: TokenStream) -> TokenStream {

TokenStream::from(quote! {
pub struct #fetch_struct_name<#punctuated_generics>(#phantoms);
impl #impl_generics #path::SystemParam for #struct_name#ty_generics #where_clause {
impl #impl_generics #ecs_path::SystemParam for #struct_name#ty_generics #where_clause {
type Fetch = #fetch_struct_name <#punctuated_generic_idents>;
}

impl #impl_generics #path::FetchSystemParam<'a> for #fetch_struct_name<#punctuated_generic_idents> {
impl #impl_generics #ecs_path::FetchSystemParam<'a> for #fetch_struct_name<#punctuated_generic_idents> {
type Item = #struct_name#ty_generics;
fn init(system_state: &mut #path::SystemState, world: &#path::World, resources: &mut #path::Resources) {
#(<<#field_types as #path::SystemParam>::Fetch as #path::FetchSystemParam>::init(system_state, world, resources);)*
fn init(system_state: &mut #ecs_path::SystemState, world: &#ecs_path::World, resources: &mut #ecs_path::Resources) {
#(<<#field_types as #ecs_path::SystemParam>::Fetch as #ecs_path::FetchSystemParam>::init(system_state, world, resources);)*
}

unsafe fn get_param(
system_state: &'a #path::SystemState,
world: &'a #path::World,
resources: &'a #path::Resources,
system_state: &'a #ecs_path::SystemState,
world: &'a #ecs_path::World,
resources: &'a #ecs_path::Resources,
) -> Option<Self::Item> {
Some(#struct_name {
#(#fields: <<#field_types as #path::SystemParam>::Fetch as #path::FetchSystemParam>::get_param(system_state, world, resources)?,)*
#(#fields: <<#field_types as #ecs_path::SystemParam>::Fetch as #ecs_path::FetchSystemParam>::get_param(system_state, world, resources)?,)*
#(#ignored_fields: <#ignored_field_types>::default(),)*
})
}
Expand Down Expand Up @@ -487,24 +470,36 @@ pub fn derive_ambiguity_set_label(input: TokenStream) -> TokenStream {

fn derive_label(input: DeriveInput, label_type: Ident) -> TokenStream2 {
let ident = input.ident;

let manifest = Manifest::new().unwrap();
let path_str = if let Some(package) = manifest.find(|name| name == "bevy") {
format!("{}::ecs", package.name)
} else if let Some(package) = manifest.find(|name| name == "bevy_internal") {
format!("{}::ecs", package.name)
} else if let Some(package) = manifest.find(|name| name == "bevy_ecs") {
package.name
} else {
"bevy_ecs".to_string()
};
let crate_path: Path = syn::parse(path_str.parse::<TokenStream>().unwrap()).unwrap();
let ecs_path: Path = bevy_ecs_path();

quote! {
impl #crate_path::#label_type for #ident {
fn dyn_clone(&self) -> Box<dyn #crate_path::#label_type> {
impl #ecs_path::#label_type for #ident {
fn dyn_clone(&self) -> Box<dyn #ecs_path::#label_type> {
Box::new(Clone::clone(self))
}
}
}
}

fn bevy_ecs_path() -> syn::Path {
fn find_in_manifest(manifest: &mut Manifest, dependencies: Dependencies) -> Option<String> {
manifest.dependencies = dependencies;
if let Some(package) = manifest.find(|name| name == "bevy") {
Some(format!("{}::ecs", package.name))
} else if let Some(package) = manifest.find(|name| name == "bevy_internal") {
Some(format!("{}::ecs", package.name))
} else if let Some(package) = manifest.find(|name| name == "bevy_ecs") {
Some(package.name)
} else {
None
}
}

let mut manifest = Manifest::new().unwrap();
let path_str = find_in_manifest(&mut manifest, Dependencies::Release)
.or_else(|| find_in_manifest(&mut manifest, Dependencies::Dev))
.unwrap_or_else(|| "bevy_ecs".to_string());

let path: Path = syn::parse(path_str.parse::<TokenStream>().unwrap()).unwrap();
path
}