From 9835e2ae736235810b4ea1c162ca5e65c547e770 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 18 May 2024 04:49:50 +0200 Subject: Merging upstream version 1.71.1+dfsg1. Signed-off-by: Daniel Baumann --- vendor/partial_ref_derive/.cargo-checksum.json | 1 + vendor/partial_ref_derive/Cargo.toml | 32 +++ vendor/partial_ref_derive/LICENSE-APACHE | 201 +++++++++++++++++ vendor/partial_ref_derive/LICENSE-MIT | 25 +++ vendor/partial_ref_derive/README.md | 23 ++ vendor/partial_ref_derive/src/lib.rs | 287 +++++++++++++++++++++++++ 6 files changed, 569 insertions(+) create mode 100644 vendor/partial_ref_derive/.cargo-checksum.json create mode 100644 vendor/partial_ref_derive/Cargo.toml create mode 100644 vendor/partial_ref_derive/LICENSE-APACHE create mode 100644 vendor/partial_ref_derive/LICENSE-MIT create mode 100644 vendor/partial_ref_derive/README.md create mode 100644 vendor/partial_ref_derive/src/lib.rs (limited to 'vendor/partial_ref_derive') diff --git a/vendor/partial_ref_derive/.cargo-checksum.json b/vendor/partial_ref_derive/.cargo-checksum.json new file mode 100644 index 000000000..200baeca1 --- /dev/null +++ b/vendor/partial_ref_derive/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"Cargo.toml":"a17795308b5feb72b1b93dd6589bf0d75db791c642b6b024c189723cc3b28ec6","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"518718c95bcadbc4796051b0dfe05500fddc5b21cb68dab51857ca85f3fd438d","README.md":"e760cf6313db6154c91878a2c8f69006addc889b5aed6d949a7df3681ebe584e","src/lib.rs":"03253440856eaa11d655351e21bbb22e399f8978a3d82e9dc9d6be5e5a74de7c"},"package":"300e1d2cb5b898b5a5342e994e0d0c367dbfe69cbf717cd307045ec9fb057581"} \ No newline at end of file diff --git a/vendor/partial_ref_derive/Cargo.toml b/vendor/partial_ref_derive/Cargo.toml new file mode 100644 index 000000000..2794ad37f --- /dev/null +++ b/vendor/partial_ref_derive/Cargo.toml @@ -0,0 +1,32 @@ +# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO +# +# When uploading crates to the registry Cargo will automatically +# "normalize" Cargo.toml files for maximal compatibility +# with all versions of Cargo and also rewrite `path` dependencies +# to registry (e.g., crates.io) dependencies +# +# If you believe there's an error in this file please file an +# issue against the rust-lang/cargo repository. If you're +# editing this file be aware that the upstream Cargo.toml +# will likely look very different (and much more reasonable) + +[package] +edition = "2018" +name = "partial_ref_derive" +version = "0.3.3" +authors = ["Jannis Harder "] +description = "Derives for partial_ref" +readme = "README.md" +license = "MIT/Apache-2.0" +repository = "https://github.com/jix/partial_ref" + +[lib] +proc-macro = true +[dependencies.proc-macro2] +version = "1.0.20" + +[dependencies.quote] +version = "1.0.7" + +[dependencies.syn] +version = "1.0.40" diff --git a/vendor/partial_ref_derive/LICENSE-APACHE b/vendor/partial_ref_derive/LICENSE-APACHE new file mode 100644 index 000000000..16fe87b06 --- /dev/null +++ b/vendor/partial_ref_derive/LICENSE-APACHE @@ -0,0 +1,201 @@ + 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/vendor/partial_ref_derive/README.md b/vendor/partial_ref_derive/README.md new file mode 100644 index 000000000..985193780 --- /dev/null +++ b/vendor/partial_ref_derive/README.md @@ -0,0 +1,23 @@ +# partial_ref_derive - Derives for partial_ref + +This crate provides derives for the [partial_ref] crate. + +## License + +The partial_ref source code is licensed under either of + + * Apache License, Version 2.0 + ([LICENSE-APACHE](LICENSE-APACHE) or + http://www.apache.org/licenses/LICENSE-2.0) + * MIT license + ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) + +at your option. + +### Contribution + +Unless you explicitly state otherwise, any contribution intentionally submitted +for inclusion in partial_ref by you, as defined in the Apache-2.0 license, +shall be dual licensed as above, without any additional terms or conditions. + +[partial_ref]:https://crates.io/crates/partial_ref diff --git a/vendor/partial_ref_derive/src/lib.rs b/vendor/partial_ref_derive/src/lib.rs new file mode 100644 index 000000000..f204fd84a --- /dev/null +++ b/vendor/partial_ref_derive/src/lib.rs @@ -0,0 +1,287 @@ +//! Derives instances of PartialRefTarget and associated traits for the `partial_ref` crate. +#![recursion_limit = "128"] +extern crate proc_macro; + +use std::collections::HashSet; + +use crate::proc_macro::TokenStream; + +use proc_macro2::{Span, TokenTree}; +use quote::{quote, ToTokens}; +use syn::{ + parse_macro_input, parse_quote, parse_str, Attribute, Data, DeriveInput, Lifetime, LifetimeDef, + Lit, Member, Meta, Type, TypeParen, +}; + +fn parse_attribute_as_type(attr: &Attribute) -> Type { + if let Some(TokenTree::Group(group)) = attr.tokens.clone().into_iter().next() { + let parsed_type: Type = parse_quote!(#group); + // This avoids unnecessary parentheses around type warnings from the generated code. + if let Type::Paren(TypeParen { elem, .. }) = parsed_type { + return *elem; + } + return parsed_type; + } + + let parse_panic = || panic!("could not parse attribute `{}`", attr.tokens.to_string()); + let meta = attr.parse_meta().unwrap_or_else(|_| parse_panic()); + if let Meta::NameValue(name_value) = meta { + if let Lit::Str(string) = name_value.lit { + match parse_str(&string.value()) { + Err(_) => panic!("could not parse type `{}` in attribute", string.value()), + Ok(parsed_type) => return parsed_type, + } + } + } + parse_panic(); + unreachable!() +} + +/// If the input is non-empty remove the enclosing `<` and `>` and prepend a comma. +/// +/// Does not check whether the enclosing tokens actually are `<` and `>`. +fn generics_to_extra_generics(generics: &impl ToTokens) -> proc_macro2::TokenStream { + let mut generics_tokens = proc_macro2::TokenStream::new(); + generics.to_tokens(&mut generics_tokens); + + let mut generics_tokens = generics_tokens.into_iter().collect::>(); + + if !generics_tokens.is_empty() { + generics_tokens[0] = quote!(,).into_iter().next().unwrap(); + generics_tokens.pop(); + } + + let mut extra_tokens = proc_macro2::TokenStream::new(); + extra_tokens.extend(generics_tokens); + extra_tokens +} + +/// Generate a new lifetime that doesn't conflict with the existing lifetimes. +fn fresh_lifetime<'a>(lifetimes: impl Iterator, name: &str) -> Lifetime { + let mut used_idents = HashSet::new(); + for lifetime in lifetimes { + used_idents.insert(lifetime.lifetime.ident.to_string()); + } + + let mut lifetime_name = name.to_owned(); + let mut counter = 0; + + while used_idents.contains(&lifetime_name) { + use std::fmt::Write; + counter += 1; + lifetime_name.clear(); + write!(&mut lifetime_name, "{}{}", name, counter).unwrap(); + } + + Lifetime::new(&format!("'{}", lifetime_name), Span::call_site()) +} + +/// Derives instances of PartialRefTarget and associated traits. +/// +/// Can only be used for structs. The attribute `#[part(PartName)]` can be used on the struct itself +/// for an abstract part or on a field for a field part. Parts have to be declared separately. +/// `PartName` can be any valid rust type that implements the Part trait. For fields the field type +/// of the part has to match the actual type of the field. +/// +/// Example: +/// +/// ```ignore +/// use partial_ref::{PartialRefTarget, part}; +/// +/// #[derive(PartialRefTarget)] +/// #[part(SomeAbstractPart)] +/// struct ExampleStruct { +/// field_without_part: usize, +/// #[part(SomeFieldPart)] +/// a: usize, +/// #[part(another_crate::AnotherFieldPart)] +/// b: usize, +/// } +/// ``` +/// +/// Instead of `#[part(PartName)]` it is also possible to use `#[part = "PartName"]` which was the +/// only supported syntax in previous versions of this crate. +/// + +// TODO figure out how to link to doc items of the partial_ref crate +#[proc_macro_derive(PartialRefTarget, attributes(part))] +pub fn derive_partial_ref_target(input: TokenStream) -> TokenStream { + let input = parse_macro_input!(input as DeriveInput); + + let target_ident = input.ident; + + let lt_a = fresh_lifetime(input.generics.lifetimes(), "a"); + + let (impl_generics, target_generics, where_clause) = input.generics.split_for_impl(); + + if where_clause.is_some() { + panic!("cannot derive PartialRef target for structs with a where clause"); + // TODO lift this restriction + } + + let extra_generics = generics_to_extra_generics(&impl_generics); + + let target_type = quote!(#target_ident #target_generics); + + let data_struct = match input.data { + Data::Struct(data_struct) => data_struct, + _ => panic!("deriving PartialRefTarget is only supported on structs"), + }; + + let mut abstract_parts: Vec = vec![]; + let mut typed_parts: Vec<(Member, Type)> = vec![]; + + for attr in input.attrs.iter() { + if attr.path.is_ident("part") { + abstract_parts.push(parse_attribute_as_type(&attr)); + } + } + + for (field_index, field) in data_struct.fields.iter().enumerate() { + let mut part: Option = None; + + for attr in field.attrs.iter() { + if attr.path.is_ident("part") { + if part.is_some() { + panic!( + "{} has multiple parts", + field + .ident + .as_ref() + .map_or("unnamed field".to_owned(), |i| format!("field `{}`", i)) + ); + } + part = Some(parse_attribute_as_type(&attr)); + } + } + + if let Some(part_type) = part { + let member = field + .ident + .as_ref() + .map_or(Member::Unnamed(field_index.into()), |ident| { + Member::Named(ident.clone()) + }); + typed_parts.push((member, part_type)); + } + } + + let mut const_type = quote!(::partial_ref::Ref<#lt_a, #target_type>); + let mut mut_type = quote!(::partial_ref::Ref<#lt_a, #target_type>); + let mut split_const_type = quote!(Reference); + let mut split_mut_type = quote!(Reference); + + for part in abstract_parts.iter() { + const_type = quote!(::partial_ref::Const<#part, #const_type>); + mut_type = quote!(::partial_ref::Mut<#part, #mut_type>); + + split_const_type = quote!( + ::partial_ref::Const< + ::partial_ref::Nested, + #split_const_type + > + ); + split_mut_type = quote!( + ::partial_ref::Mut< + ::partial_ref::Nested, + #split_mut_type + > + ); + } + + for (_, part) in typed_parts.iter() { + const_type = quote!(::partial_ref::Const<#part, #const_type>); + mut_type = quote!(::partial_ref::Mut<#part, #mut_type>); + + split_const_type = quote!( + ::partial_ref::Const< + ::partial_ref::Nested, + #split_const_type + > + ); + split_mut_type = quote!( + ::partial_ref::Mut< + ::partial_ref::Nested, + #split_mut_type + > + ); + } + + let mut result = vec![]; + + result.push(TokenStream::from(quote! { + impl<#lt_a #extra_generics> ::partial_ref::IntoPartialRef<#lt_a> for &#lt_a #target_type { + type Ref = #const_type; + #[inline(always)] + fn into_partial_ref(self) -> Self::Ref { + unsafe { + ::from_raw(self as *const _ as *mut _) + } + } + } + + impl<#lt_a #extra_generics> ::partial_ref::IntoPartialRef<#lt_a> + for &#lt_a mut #target_type { + type Ref = #mut_type; + #[inline(always)] + fn into_partial_ref(self) -> Self::Ref { + unsafe { + ::from_raw(self as *mut _) + } + } + } + + unsafe impl<#lt_a #extra_generics, ContainingPart, Reference> + ::partial_ref::SplitIntoParts<#lt_a, ContainingPart, Reference> for #target_type + where + ContainingPart: ::partial_ref::Part>, + Reference: ::partial_ref::PartialRef<#lt_a>, + Reference::Target: ::partial_ref::HasPart, + { + type Result = #split_const_type; + type ResultMut = #split_mut_type; + } + + impl #impl_generics ::partial_ref::PartialRefTarget for #target_type { + type RawTarget = Self; + } + })); + + for part in abstract_parts.iter() { + result.push(TokenStream::from(quote! { + impl #impl_generics ::partial_ref::HasPart<#part> for #target_type { + #[inline(always)] + unsafe fn part_ptr(ptr: *const Self) -> () { + unreachable!() + } + + #[inline(always)] + unsafe fn part_ptr_mut(ptr: *mut Self) -> () { + unreachable!() + } + } + })); + } + + for (member, part) in typed_parts.iter() { + result.push(TokenStream::from(quote! { + impl #impl_generics ::partial_ref::HasPart<#part> for #target_type { + #[inline(always)] + unsafe fn part_ptr( + ptr: *const Self + ) -> <<#part as ::partial_ref::Part>::PartType as ::partial_ref::PartType>::Ptr { + ::core::ptr::addr_of!((*ptr).#member) + } + + #[inline(always)] + unsafe fn part_ptr_mut( + ptr: *mut Self + ) -> <<#part as ::partial_ref::Part>::PartType as ::partial_ref::PartType>::PtrMut { + ::core::ptr::addr_of_mut!((*ptr).#member) + } + } + })); + } + + result.into_iter().collect() +} -- cgit v1.2.3