Merging upstream version 1.71.1+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

6 files changed, 569 insertions, 0 deletions

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 <me@jix.one>"]
+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. Definitions.
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+5. Submission of Contributions. Unless You explicitly state otherwise,
+   any Contribution intentionally submitted for inclusion in the Work
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+   the terms of any separate license agreement you may have executed
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+6. Trademarks. This License does not grant permission to use the trade
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+   Contributor provides its Contributions) on an "AS IS" BASIS,
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+   implied, including, without limitation, any warranties or conditions
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+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
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+END OF TERMS AND CONDITIONS
+
+APPENDIX: How to apply the Apache License to your work.
+
+   To apply the Apache License to your work, attach the following
+   boilerplate notice, with the fields enclosed by brackets "[]"
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+   comment syntax for the file format. We also recommend that a
+   file or class name and description of purpose be included on the
+   same "printed page" as the copyright notice for easier
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+
+Copyright [yyyy] [name of copyright owner]
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
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diff --git a/vendor/partial_ref_derive/LICENSE-MIT b/vendor/partial_ref_derive/LICENSE-MIT
new file mode 100644
index 000000000..90f71a8d7
--- /dev/null
+++ b/vendor/partial_ref_derive/LICENSE-MIT
@@ -0,0 +1,25 @@
+Copyright (c) 2018 Jannis Harder
+
+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/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::<Vec<_>>();
+
+    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<Item = &'a LifetimeDef>, 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<Type> = 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<Type> = 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<ContainingPart, #part>,
+                #split_const_type
+            >
+        );
+        split_mut_type = quote!(
+            ::partial_ref::Mut<
+                ::partial_ref::Nested<ContainingPart, #part>,
+                #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<ContainingPart, #part>,
+                #split_const_type
+            >
+        );
+        split_mut_type = quote!(
+            ::partial_ref::Mut<
+                ::partial_ref::Nested<ContainingPart, #part>,
+                #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 {
+                    <Self::Ref as ::partial_ref::PartialRef>::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 {
+                    <Self::Ref as ::partial_ref::PartialRef>::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<PartType=::partial_ref::Field<Self>>,
+            Reference: ::partial_ref::PartialRef<#lt_a>,
+            Reference::Target: ::partial_ref::HasPart<ContainingPart>,
+        {
+            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()
+}