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Diffstat (limited to 'rust/vendor/quote-0.6.13')
| -rw-r--r-- | rust/vendor/quote-0.6.13/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | rust/vendor/quote-0.6.13/Cargo.toml | 33 | ||||
| -rw-r--r-- | rust/vendor/quote-0.6.13/LICENSE-APACHE | 201 | ||||
| -rw-r--r-- | rust/vendor/quote-0.6.13/LICENSE-MIT | 25 | ||||
| -rw-r--r-- | rust/vendor/quote-0.6.13/README.md | 243 | ||||
| -rw-r--r-- | rust/vendor/quote-0.6.13/src/ext.rs | 112 | ||||
| -rw-r--r-- | rust/vendor/quote-0.6.13/src/lib.rs | 861 | ||||
| -rw-r--r-- | rust/vendor/quote-0.6.13/src/runtime.rs | 108 | ||||
| -rw-r--r-- | rust/vendor/quote-0.6.13/src/to_tokens.rs | 205 | ||||
| -rw-r--r-- | rust/vendor/quote-0.6.13/tests/conditional/integer128.rs | 11 | ||||
| -rw-r--r-- | rust/vendor/quote-0.6.13/tests/test.rs | 295 |
11 files changed, 2095 insertions, 0 deletions
diff --git a/rust/vendor/quote-0.6.13/.cargo-checksum.json b/rust/vendor/quote-0.6.13/.cargo-checksum.json new file mode 100644 index 0000000..2789307 --- /dev/null +++ b/rust/vendor/quote-0.6.13/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"Cargo.toml":"13a29a2a545e9e4bfae873b826ebe21de636eff1ed43e8886bd1706fd3c8e7fd","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"c9a75f18b9ab2927829a208fc6aa2cf4e63b8420887ba29cdb265d6619ae82d5","README.md":"a398cc6ad5faa5f8682b6ff56b159205a17e0f23ecf5dea496d3392d072fd4e8","src/ext.rs":"03919239a20f8393288783a21bf6fdee12e405d13d162c9faa6f8f5ce54b003b","src/lib.rs":"670c044274458bfe0d584804f1913f05faceb27d0ad71357d0817bfc879282b4","src/runtime.rs":"e8092bf5b845289b9ecfcb7d7f8a8bbc36877460221ba8994adf6c93236394ee","src/to_tokens.rs":"5b4155ff36262fb81f98ca8a9e903e9cf1ca346e72cb36a2de746e10d3b24d49","tests/conditional/integer128.rs":"d83e21a91efbaa801a82ae499111bdda2d31edaa620e78c0199eba42d69c9ee6","tests/test.rs":"5a7095e813d9c69082ae7f13ac0577c97c867c6e8fb80b9732e105c1bc7d14ab"},"package":"6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"}
\ No newline at end of file diff --git a/rust/vendor/quote-0.6.13/Cargo.toml b/rust/vendor/quote-0.6.13/Cargo.toml new file mode 100644 index 0000000..378e9fb --- /dev/null +++ b/rust/vendor/quote-0.6.13/Cargo.toml @@ -0,0 +1,33 @@ +# 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] +name = "quote" +version = "0.6.13" +authors = ["David Tolnay <dtolnay@gmail.com>"] +include = ["Cargo.toml", "src/**/*.rs", "tests/**/*.rs", "README.md", "LICENSE-APACHE", "LICENSE-MIT"] +description = "Quasi-quoting macro quote!(...)" +documentation = "https://docs.rs/quote/" +readme = "README.md" +keywords = ["syn"] +categories = ["development-tools::procedural-macro-helpers"] +license = "MIT OR Apache-2.0" +repository = "https://github.com/dtolnay/quote" +[dependencies.proc-macro2] +version = "0.4.21" +default-features = false + +[features] +default = ["proc-macro"] +proc-macro = ["proc-macro2/proc-macro"] +[badges.travis-ci] +repository = "dtolnay/quote" diff --git a/rust/vendor/quote-0.6.13/LICENSE-APACHE b/rust/vendor/quote-0.6.13/LICENSE-APACHE new file mode 100644 index 0000000..16fe87b --- /dev/null +++ b/rust/vendor/quote-0.6.13/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/rust/vendor/quote-0.6.13/README.md b/rust/vendor/quote-0.6.13/README.md new file mode 100644 index 0000000..8a5d590 --- /dev/null +++ b/rust/vendor/quote-0.6.13/README.md @@ -0,0 +1,243 @@ +Rust Quasi-Quoting +================== + +[](https://travis-ci.org/dtolnay/quote) +[](https://crates.io/crates/quote) +[](https://docs.rs/quote/) + +This crate provides the [`quote!`] macro for turning Rust syntax tree data +structures into tokens of source code. + +[`quote!`]: https://docs.rs/quote/0.6/quote/macro.quote.html + +Procedural macros in Rust receive a stream of tokens as input, execute arbitrary +Rust code to determine how to manipulate those tokens, and produce a stream of +tokens to hand back to the compiler to compile into the caller's crate. +Quasi-quoting is a solution to one piece of that -- producing tokens to return +to the compiler. + +The idea of quasi-quoting is that we write *code* that we treat as *data*. +Within the `quote!` macro, we can write what looks like code to our text editor +or IDE. We get all the benefits of the editor's brace matching, syntax +highlighting, indentation, and maybe autocompletion. But rather than compiling +that as code into the current crate, we can treat it as data, pass it around, +mutate it, and eventually hand it back to the compiler as tokens to compile into +the macro caller's crate. + +This crate is motivated by the procedural macro use case, but is a +general-purpose Rust quasi-quoting library and is not specific to procedural +macros. + +*Version requirement: Quote supports any compiler version back to Rust's very +first support for procedural macros in Rust 1.15.0.* + +[*Release notes*](https://github.com/dtolnay/quote/releases) + +```toml +[dependencies] +quote = "0.6" +``` + +## Syntax + +The quote crate provides a [`quote!`] macro within which you can write Rust code +that gets packaged into a [`TokenStream`] and can be treated as data. You should +think of `TokenStream` as representing a fragment of Rust source code. + +[`TokenStream`]: https://docs.rs/proc-macro2/0.4/proc_macro2/struct.TokenStream.html + +Within the `quote!` macro, interpolation is done with `#var`. Any type +implementing the [`quote::ToTokens`] trait can be interpolated. This includes +most Rust primitive types as well as most of the syntax tree types from [`syn`]. + +[`quote::ToTokens`]: https://docs.rs/quote/0.6/quote/trait.ToTokens.html +[`syn`]: https://github.com/dtolnay/syn + +```rust +let tokens = quote! { + struct SerializeWith #generics #where_clause { + value: &'a #field_ty, + phantom: core::marker::PhantomData<#item_ty>, + } + + impl #generics serde::Serialize for SerializeWith #generics #where_clause { + fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> + where + S: serde::Serializer, + { + #path(self.value, serializer) + } + } + + SerializeWith { + value: #value, + phantom: core::marker::PhantomData::<#item_ty>, + } +}; +``` + +## Repetition + +Repetition is done using `#(...)*` or `#(...),*` similar to `macro_rules!`. This +iterates through the elements of any variable interpolated within the repetition +and inserts a copy of the repetition body for each one. The variables in an +interpolation may be anything that implements `IntoIterator`, including `Vec` or +a pre-existing iterator. + +- `#(#var)*` — no separators +- `#(#var),*` — the character before the asterisk is used as a separator +- `#( struct #var; )*` — the repetition can contain other things +- `#( #k => println!("{}", #v), )*` — even multiple interpolations + +Note that there is a difference between `#(#var ,)*` and `#(#var),*`—the latter +does not produce a trailing comma. This matches the behavior of delimiters in +`macro_rules!`. + +## Returning tokens to the compiler + +The `quote!` macro evaluates to an expression of type +`proc_macro2::TokenStream`. Meanwhile Rust procedural macros are expected to +return the type `proc_macro::TokenStream`. + +The difference between the two types is that `proc_macro` types are entirely +specific to procedural macros and cannot ever exist in code outside of a +procedural macro, while `proc_macro2` types may exist anywhere including tests +and non-macro code like main.rs and build.rs. This is why even the procedural +macro ecosystem is largely built around `proc_macro2`, because that ensures the +libraries are unit testable and accessible in non-macro contexts. + +There is a [`From`]-conversion in both directions so returning the output of +`quote!` from a procedural macro usually looks like `tokens.into()` or +`proc_macro::TokenStream::from(tokens)`. + +[`From`]: https://doc.rust-lang.org/std/convert/trait.From.html + +## Examples + +### Combining quoted fragments + +Usually you don't end up constructing an entire final `TokenStream` in one +piece. Different parts may come from different helper functions. The tokens +produced by `quote!` themselves implement `ToTokens` and so can be interpolated +into later `quote!` invocations to build up a final result. + +```rust +let type_definition = quote! {...}; +let methods = quote! {...}; + +let tokens = quote! { + #type_definition + #methods +}; +``` + +### Constructing identifiers + +Suppose we have an identifier `ident` which came from somewhere in a macro +input and we need to modify it in some way for the macro output. Let's consider +prepending the identifier with an underscore. + +Simply interpolating the identifier next to an underscore will not have the +behavior of concatenating them. The underscore and the identifier will continue +to be two separate tokens as if you had written `_ x`. + +```rust +// incorrect +quote! { + let mut _#ident = 0; +} +``` + +The solution is to perform token-level manipulations using the APIs provided by +Syn and proc-macro2. + +```rust +let concatenated = format!("_{}", ident); +let varname = syn::Ident::new(&concatenated, ident.span()); +quote! { + let mut #varname = 0; +} +``` + +### Making method calls + +Let's say our macro requires some type specified in the macro input to have a +constructor called `new`. We have the type in a variable called `field_type` of +type `syn::Type` and want to invoke the constructor. + +```rust +// incorrect +quote! { + let value = #field_type::new(); +} +``` + +This works only sometimes. If `field_type` is `String`, the expanded code +contains `String::new()` which is fine. But if `field_type` is something like +`Vec<i32>` then the expanded code is `Vec<i32>::new()` which is invalid syntax. +Ordinarily in handwritten Rust we would write `Vec::<i32>::new()` but for macros +often the following is more convenient. + +```rust +quote! { + let value = <#field_type>::new(); +} +``` + +This expands to `<Vec<i32>>::new()` which behaves correctly. + +A similar pattern is appropriate for trait methods. + +```rust +quote! { + let value = <#field_type as core::default::Default>::default(); +} +``` + +## Hygiene + +Any interpolated tokens preserve the `Span` information provided by their +`ToTokens` implementation. Tokens that originate within a `quote!` invocation +are spanned with [`Span::call_site()`]. + +[`Span::call_site()`]: https://docs.rs/proc-macro2/0.4/proc_macro2/struct.Span.html#method.call_site + +A different span can be provided explicitly through the [`quote_spanned!`] +macro. + +[`quote_spanned!`]: https://docs.rs/quote/0.6/quote/macro.quote_spanned.html + +### Limitations + +- A non-repeating variable may not be interpolated inside of a repeating block + ([#7]). +- The same variable may not be interpolated more than once inside of a repeating + block ([#8]). + +[#7]: https://github.com/dtolnay/quote/issues/7 +[#8]: https://github.com/dtolnay/quote/issues/8 + +### Recursion limit + +The `quote!` macro relies on deep recursion so some large invocations may fail +with "recursion limit reached" when you compile. If it fails, bump up the +recursion limit by adding `#![recursion_limit = "128"]` to your crate. An even +higher limit may be necessary for especially large invocations. You don't need +this unless the compiler tells you that you need it. + +<br> + +#### License + +<sup> +Licensed under either of <a href="LICENSE-APACHE">Apache License, Version +2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option. +</sup> + +<br> + +<sub> +Unless you explicitly state otherwise, any contribution intentionally submitted +for inclusion in this crate by you, as defined in the Apache-2.0 license, shall +be dual licensed as above, without any additional terms or conditions. +</sub> diff --git a/rust/vendor/quote-0.6.13/src/ext.rs b/rust/vendor/quote-0.6.13/src/ext.rs new file mode 100644 index 0000000..7ebbe30 --- /dev/null +++ b/rust/vendor/quote-0.6.13/src/ext.rs @@ -0,0 +1,112 @@ +use super::ToTokens; + +use std::iter; + +use proc_macro2::{TokenStream, TokenTree}; + +/// TokenStream extension trait with methods for appending tokens. +/// +/// This trait is sealed and cannot be implemented outside of the `quote` crate. +pub trait TokenStreamExt: private::Sealed { + /// For use by `ToTokens` implementations. + /// + /// Appends the token specified to this list of tokens. + fn append<U>(&mut self, token: U) + where + U: Into<TokenTree>; + + /// For use by `ToTokens` implementations. + /// + /// ```edition2018 + /// # use quote::{quote, TokenStreamExt, ToTokens}; + /// # use proc_macro2::TokenStream; + /// # + /// struct X; + /// + /// impl ToTokens for X { + /// fn to_tokens(&self, tokens: &mut TokenStream) { + /// tokens.append_all(&[true, false]); + /// } + /// } + /// + /// let tokens = quote!(#X); + /// assert_eq!(tokens.to_string(), "true false"); + /// ``` + fn append_all<T, I>(&mut self, iter: I) + where + T: ToTokens, + I: IntoIterator<Item = T>; + + /// For use by `ToTokens` implementations. + /// + /// Appends all of the items in the iterator `I`, separated by the tokens + /// `U`. + fn append_separated<T, I, U>(&mut self, iter: I, op: U) + where + T: ToTokens, + I: IntoIterator<Item = T>, + U: ToTokens; + + /// For use by `ToTokens` implementations. + /// + /// Appends all tokens in the iterator `I`, appending `U` after each + /// element, including after the last element of the iterator. + fn append_terminated<T, I, U>(&mut self, iter: I, term: U) + where + T: ToTokens, + I: IntoIterator<Item = T>, + U: ToTokens; +} + +impl TokenStreamExt for TokenStream { + fn append<U>(&mut self, token: U) + where + U: Into<TokenTree>, + { + self.extend(iter::once(token.into())); + } + + fn append_all<T, I>(&mut self, iter: I) + where + T: ToTokens, + I: IntoIterator<Item = T>, + { + for token in iter { + token.to_tokens(self); + } + } + + fn append_separated<T, I, U>(&mut self, iter: I, op: U) + where + T: ToTokens, + I: IntoIterator<Item = T>, + U: ToTokens, + { + for (i, token) in iter.into_iter().enumerate() { + if i > 0 { + op.to_tokens(self); + } + token.to_tokens(self); + } + } + + fn append_terminated<T, I, U>(&mut self, iter: I, term: U) + where + T: ToTokens, + I: IntoIterator<Item = T>, + U: ToTokens, + { + for token in iter { + token.to_tokens(self); + term.to_tokens(self); + } + } +} + +mod private { + use proc_macro2::TokenStream; + + pub trait Sealed {} + + impl Sealed for TokenStream {} +} diff --git a/rust/vendor/quote-0.6.13/src/lib.rs b/rust/vendor/quote-0.6.13/src/lib.rs new file mode 100644 index 0000000..c201d60 --- /dev/null +++ b/rust/vendor/quote-0.6.13/src/lib.rs @@ -0,0 +1,861 @@ +//! This crate provides the [`quote!`] macro for turning Rust syntax tree data +//! structures into tokens of source code. +//! +//! [`quote!`]: macro.quote.html +//! +//! Procedural macros in Rust receive a stream of tokens as input, execute +//! arbitrary Rust code to determine how to manipulate those tokens, and produce +//! a stream of tokens to hand back to the compiler to compile into the caller's +//! crate. Quasi-quoting is a solution to one piece of that -- producing tokens +//! to return to the compiler. +//! +//! The idea of quasi-quoting is that we write *code* that we treat as *data*. +//! Within the `quote!` macro, we can write what looks like code to our text +//! editor or IDE. We get all the benefits of the editor's brace matching, +//! syntax highlighting, indentation, and maybe autocompletion. But rather than +//! compiling that as code into the current crate, we can treat it as data, pass +//! it around, mutate it, and eventually hand it back to the compiler as tokens +//! to compile into the macro caller's crate. +//! +//! This crate is motivated by the procedural macro use case, but is a +//! general-purpose Rust quasi-quoting library and is not specific to procedural +//! macros. +//! +//! *Version requirement: Quote supports any compiler version back to Rust's +//! very first support for procedural macros in Rust 1.15.0.* +//! +//! ```toml +//! [dependencies] +//! quote = "0.6" +//! ``` +//! +//! # Example +//! +//! The following quasi-quoted block of code is something you might find in [a] +//! procedural macro having to do with data structure serialization. The `#var` +//! syntax performs interpolation of runtime variables into the quoted tokens. +//! Check out the documentation of the [`quote!`] macro for more detail about +//! the syntax. See also the [`quote_spanned!`] macro which is important for +//! implementing hygienic procedural macros. +//! +//! [a]: https://serde.rs/ +//! [`quote_spanned!`]: macro.quote_spanned.html +//! +//! ```edition2018 +//! # use quote::quote; +//! # +//! # let generics = ""; +//! # let where_clause = ""; +//! # let field_ty = ""; +//! # let item_ty = ""; +//! # let path = ""; +//! # let value = ""; +//! # +//! let tokens = quote! { +//! struct SerializeWith #generics #where_clause { +//! value: &'a #field_ty, +//! phantom: core::marker::PhantomData<#item_ty>, +//! } +//! +//! impl #generics serde::Serialize for SerializeWith #generics #where_clause { +//! fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> +//! where +//! S: serde::Serializer, +//! { +//! #path(self.value, serializer) +//! } +//! } +//! +//! SerializeWith { +//! value: #value, +//! phantom: core::marker::PhantomData::<#item_ty>, +//! } +//! }; +//! ``` +//! +//! # Recursion limit +//! +//! The `quote!` macro relies on deep recursion so some large invocations may +//! fail with "recursion limit reached" when you compile. If it fails, bump up +//! the recursion limit by adding `#![recursion_limit = "128"]` to your crate. +//! An even higher limit may be necessary for especially large invocations. + +// Quote types in rustdoc of other crates get linked to here. +#![doc(html_root_url = "https://docs.rs/quote/0.6.13")] + +#[cfg(all( + not(all(target_arch = "wasm32", target_os = "unknown")), + feature = "proc-macro" +))] +extern crate proc_macro; +extern crate proc_macro2; + +mod ext; +pub use ext::TokenStreamExt; + +mod to_tokens; +pub use to_tokens::ToTokens; + +// Not public API. +#[doc(hidden)] +#[path = "runtime.rs"] +pub mod __rt; + +/// The whole point. +/// +/// Performs variable interpolation against the input and produces it as +/// [`TokenStream`]. For returning tokens to the compiler in a procedural macro, use +/// `into()` to build a `TokenStream`. +/// +/// [`TokenStream`]: https://docs.rs/proc-macro2/0.4/proc_macro2/struct.TokenStream.html +/// +/// # Interpolation +/// +/// Variable interpolation is done with `#var` (similar to `$var` in +/// `macro_rules!` macros). This grabs the `var` variable that is currently in +/// scope and inserts it in that location in the output tokens. Any type +/// implementing the [`ToTokens`] trait can be interpolated. This includes most +/// Rust primitive types as well as most of the syntax tree types from the [Syn] +/// crate. +/// +/// [`ToTokens`]: trait.ToTokens.html +/// [Syn]: https://github.com/dtolnay/syn +/// +/// Repetition is done using `#(...)*` or `#(...),*` again similar to +/// `macro_rules!`. This iterates through the elements of any variable +/// interpolated within the repetition and inserts a copy of the repetition body +/// for each one. The variables in an interpolation may be anything that +/// implements `IntoIterator`, including `Vec` or a pre-existing iterator. +/// +/// - `#(#var)*` — no separators +/// - `#(#var),*` — the character before the asterisk is used as a separator +/// - `#( struct #var; )*` — the repetition can contain other tokens +/// - `#( #k => println!("{}", #v), )*` — even multiple interpolations +/// +/// There are two limitations around interpolations in a repetition: +/// +/// - Every interpolation inside of a repetition must be a distinct variable. +/// That is, `#(#a #a)*` is not allowed. Work around this by collecting `a` +/// into a vector and taking references `a1 = &a` and `a2 = &a` which you use +/// inside the repetition: `#(#a1 #a2)*`. Where possible, use meaningful names +/// that indicate the distinct role of each copy. +/// +/// - Every interpolation inside of a repetition must be iterable. If we have +/// `vec` which is a vector and `ident` which is a single identifier, +/// `#(#ident #vec)*` is not allowed. Work around this by using +/// `std::iter::repeat(ident)` to produce an iterable that can be used from +/// within the repetition. +/// +/// # Hygiene +/// +/// Any interpolated tokens preserve the `Span` information provided by their +/// `ToTokens` implementation. Tokens that originate within the `quote!` +/// invocation are spanned with [`Span::call_site()`]. +/// +/// [`Span::call_site()`]: https://docs.rs/proc-macro2/0.4/proc_macro2/struct.Span.html#method.call_site +/// +/// A different span can be provided through the [`quote_spanned!`] macro. +/// +/// [`quote_spanned!`]: macro.quote_spanned.html +/// +/// # Return type +/// +/// The macro evaluates to an expression of type `proc_macro2::TokenStream`. +/// Meanwhile Rust procedural macros are expected to return the type +/// `proc_macro::TokenStream`. +/// +/// The difference between the two types is that `proc_macro` types are entirely +/// specific to procedural macros and cannot ever exist in code outside of a +/// procedural macro, while `proc_macro2` types may exist anywhere including +/// tests and non-macro code like main.rs and build.rs. This is why even the +/// procedural macro ecosystem is largely built around `proc_macro2`, because +/// that ensures the libraries are unit testable and accessible in non-macro +/// contexts. +/// +/// There is a [`From`]-conversion in both directions so returning the output of +/// `quote!` from a procedural macro usually looks like `tokens.into()` or +/// `proc_macro::TokenStream::from(tokens)`. +/// +/// [`From`]: https://doc.rust-lang.org/std/convert/trait.From.html +/// +/// # Examples +/// +/// ## Procedural macro +/// +/// The structure of a basic procedural macro is as follows. Refer to the [Syn] +/// crate for further useful guidance on using `quote!` as part of a procedural +/// macro. +/// +/// [Syn]: https://github.com/dtolnay/syn +/// +/// ```edition2018 +/// # #[cfg(any())] +/// extern crate proc_macro; +/// # use proc_macro2 as proc_macro; +/// +/// use proc_macro::TokenStream; +/// use quote::quote; +/// +/// # const IGNORE_TOKENS: &'static str = stringify! { +/// #[proc_macro_derive(HeapSize)] +/// # }; +/// pub fn derive_heap_size(input: TokenStream) -> TokenStream { +/// // Parse the input and figure out what implementation to generate... +/// # const IGNORE_TOKENS: &'static str = stringify! { +/// let name = /* ... */; +/// let expr = /* ... */; +/// # }; +/// # +/// # let name = 0; +/// # let expr = 0; +/// +/// let expanded = quote! { +/// // The generated impl. +/// impl heapsize::HeapSize for #name { +/// fn heap_size_of_children(&self) -> usize { +/// #expr +/// } +/// } +/// }; +/// +/// // Hand the output tokens back to the compiler. +/// TokenStream::from(expanded) +/// } +/// ``` +/// +/// ## Combining quoted fragments +/// +/// Usually you don't end up constructing an entire final `TokenStream` in one +/// piece. Different parts may come from different helper functions. The tokens +/// produced by `quote!` themselves implement `ToTokens` and so can be +/// interpolated into later `quote!` invocations to build up a final result. +/// +/// ```edition2018 +/// # use quote::quote; +/// # +/// let type_definition = quote! {...}; +/// let methods = quote! {...}; +/// +/// let tokens = quote! { +/// #type_definition +/// #methods +/// }; +/// ``` +/// +/// ## Constructing identifiers +/// +/// Suppose we have an identifier `ident` which came from somewhere in a macro +/// input and we need to modify it in some way for the macro output. Let's +/// consider prepending the identifier with an underscore. +/// +/// Simply interpolating the identifier next to an underscore will not have the +/// behavior of concatenating them. The underscore and the identifier will +/// continue to be two separate tokens as if you had written `_ x`. +/// +/// ```edition2018 +/// # use proc_macro2::{self as syn, Span}; +/// # use quote::quote; +/// # +/// # let ident = syn::Ident::new("i", Span::call_site()); +/// # +/// // incorrect +/// quote! { +/// let mut _#ident = 0; +/// } +/// # ; +/// ``` +/// +/// The solution is to perform token-level manipulations using the APIs provided +/// by Syn and proc-macro2. +/// +/// ```edition2018 +/// # use proc_macro2::{self as syn, Span}; +/// # use quote::quote; +/// # +/// # let ident = syn::Ident::new("i", Span::call_site()); +/// # +/// let concatenated = format!("_{}", ident); +/// let varname = syn::Ident::new(&concatenated, ident.span()); +/// quote! { +/// let mut #varname = 0; +/// } +/// # ; +/// ``` +/// +/// ## Making method calls +/// +/// Let's say our macro requires some type specified in the macro input to have +/// a constructor called `new`. We have the type in a variable called +/// `field_type` of type `syn::Type` and want to invoke the constructor. +/// +/// ```edition2018 +/// # use quote::quote; +/// # +/// # let field_type = quote!(...); +/// # +/// // incorrect +/// quote! { +/// let value = #field_type::new(); +/// } +/// # ; +/// ``` +/// +/// This works only sometimes. If `field_type` is `String`, the expanded code +/// contains `String::new()` which is fine. But if `field_type` is something +/// like `Vec<i32>` then the expanded code is `Vec<i32>::new()` which is invalid +/// syntax. Ordinarily in handwritten Rust we would write `Vec::<i32>::new()` +/// but for macros often the following is more convenient. +/// +/// ```edition2018 +/// # use quote::quote; +/// # +/// # let field_type = quote!(...); +/// # +/// quote! { +/// let value = <#field_type>::new(); +/// } +/// # ; +/// ``` +/// +/// This expands to `<Vec<i32>>::new()` which behaves correctly. +/// +/// A similar pattern is appropriate for trait methods. +/// +/// ```edition2018 +/// # use quote::quote; +/// # +/// # let field_type = quote!(...); +/// # +/// quote! { +/// let value = <#field_type as core::default::Default>::default(); +/// } +/// # ; +/// ``` +#[macro_export(local_inner_macros)] +macro_rules! quote { + ($($tt:tt)*) => { + quote_spanned!($crate::__rt::Span::call_site()=> $($tt)*) + }; +} + +/// Same as `quote!`, but applies a given span to all tokens originating within +/// the macro invocation. +/// +/// # Syntax +/// +/// A span expression of type [`Span`], followed by `=>`, followed by the tokens +/// to quote. The span expression should be brief -- use a variable for anything +/// more than a few characters. There should be no space before the `=>` token. +/// +/// [`Span`]: https://docs.rs/proc-macro2/0.4/proc_macro2/struct.Span.html +/// +/// ```edition2018 +/// # use proc_macro2::Span; +/// # use quote::quote_spanned; +/// # +/// # const IGNORE_TOKENS: &'static str = stringify! { +/// let span = /* ... */; +/// # }; +/// # let span = Span::call_site(); +/// # let init = 0; +/// +/// // On one line, use parentheses. +/// let tokens = quote_spanned!(span=> Box::into_raw(Box::new(#init))); +/// +/// // On multiple lines, place the span at the top and use braces. +/// let tokens = quote_spanned! {span=> +/// Box::into_raw(Box::new(#init)) +/// }; +/// ``` +/// +/// The lack of space before the `=>` should look jarring to Rust programmers +/// and this is intentional. The formatting is designed to be visibly +/// off-balance and draw the eye a particular way, due to the span expression +/// being evaluated in the context of the procedural macro and the remaining +/// tokens being evaluated in the generated code. +/// +/// # Hygiene +/// +/// Any interpolated tokens preserve the `Span` information provided by their +/// `ToTokens` implementation. Tokens that originate within the `quote_spanned!` +/// invocation are spanned with the given span argument. +/// +/// # Example +/// +/// The following procedural macro code uses `quote_spanned!` to assert that a +/// particular Rust type implements the [`Sync`] trait so that references can be +/// safely shared between threads. +/// +/// [`Sync`]: https://doc.rust-lang.org/std/marker/trait.Sync.html +/// +/// ```edition2018 +/// # use quote::{quote_spanned, TokenStreamExt, ToTokens}; +/// # use proc_macro2::{Span, TokenStream}; +/// # +/// # struct Type; +/// # +/// # impl Type { +/// # fn span(&self) -> Span { +/// # Span::call_site() +/// # } +/// # } +/// # +/// # impl ToTokens for Type { +/// # fn to_tokens(&self, _tokens: &mut TokenStream) {} +/// # } +/// # +/// # let ty = Type; +/// # let call_site = Span::call_site(); +/// # +/// let ty_span = ty.span(); +/// let assert_sync = quote_spanned! {ty_span=> +/// struct _AssertSync where #ty: Sync; +/// }; +/// ``` +/// +/// If the assertion fails, the user will see an error like the following. The +/// input span of their type is hightlighted in the error. +/// +/// ```text +/// error[E0277]: the trait bound `*const (): std::marker::Sync` is not satisfied +/// --> src/main.rs:10:21 +/// | +/// 10 | static ref PTR: *const () = &(); +/// | ^^^^^^^^^ `*const ()` cannot be shared between threads safely +/// ``` +/// +/// In this example it is important for the where-clause to be spanned with the +/// line/column information of the user's input type so that error messages are +/// placed appropriately by the compiler. But it is also incredibly important +/// that `Sync` resolves at the macro definition site and not the macro call +/// site. If we resolve `Sync` at the same span that the user's type is going to +/// be resolved, then they could bypass our check by defining their own trait +/// named `Sync` that is implemented for their type. +#[macro_export(local_inner_macros)] +macro_rules! quote_spanned { + ($span:expr=> $($tt:tt)*) => {{ + let mut _s = $crate::__rt::TokenStream::new(); + let _span = $span; + quote_each_token!(_s _span $($tt)*); + _s + }}; +} + +// Extract the names of all #metavariables and pass them to the $finish macro. +// +// in: pounded_var_names!(then () a #b c #( #d )* #e) +// out: then!(() b d e) +#[macro_export(local_inner_macros)] +#[doc(hidden)] +macro_rules! pounded_var_names { + ($finish:ident ($($found:ident)*) # ( $($inner:tt)* ) $($rest:tt)*) => { + pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*) + }; + + ($finish:ident ($($found:ident)*) # [ $($inner:tt)* ] $($rest:tt)*) => { + pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*) + }; + + ($finish:ident ($($found:ident)*) # { $($inner:tt)* } $($rest:tt)*) => { + pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*) + }; + + ($finish:ident ($($found:ident)*) # $first:ident $($rest:tt)*) => { + pounded_var_names!($finish ($($found)* $first) $($rest)*) + }; + + ($finish:ident ($($found:ident)*) ( $($inner:tt)* ) $($rest:tt)*) => { + pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*) + }; + + ($finish:ident ($($found:ident)*) [ $($inner:tt)* ] $($rest:tt)*) => { + pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*) + }; + + ($finish:ident ($($found:ident)*) { $($inner:tt)* } $($rest:tt)*) => { + pounded_var_names!($finish ($($found)*) $($inner)* $($rest)*) + }; + + ($finish:ident ($($found:ident)*) $ignore:tt $($rest:tt)*) => { + pounded_var_names!($finish ($($found)*) $($rest)*) + }; + + ($finish:ident ($($found:ident)*)) => { + $finish!(() $($found)*) + }; +} + +// in: nested_tuples_pat!(() a b c d e) +// out: ((((a b) c) d) e) +// +// in: nested_tuples_pat!(() a) +// out: a +#[macro_export(local_inner_macros)] +#[doc(hidden)] +macro_rules! nested_tuples_pat { + (()) => { + &() + }; + + (() $first:ident $($rest:ident)*) => { + nested_tuples_pat!(($first) $($rest)*) + }; + + (($pat:pat) $first:ident $($rest:ident)*) => { + nested_tuples_pat!((($pat, $first)) $($rest)*) + }; + + (($done:pat)) => { + $done + }; +} + +// in: multi_zip_expr!(() a b c d e) +// out: a.into_iter().zip(b).zip(c).zip(d).zip(e) +// +// in: multi_zip_iter!(() a) +// out: a +#[macro_export(local_inner_macros)] +#[doc(hidden)] +macro_rules! multi_zip_expr { + (()) => { + &[] + }; + + (() $single:ident) => { + $single + }; + + (() $first:ident $($rest:ident)*) => { + multi_zip_expr!(($first.into_iter()) $($rest)*) + }; + + (($zips:expr) $first:ident $($rest:ident)*) => { + multi_zip_expr!(($zips.zip($first)) $($rest)*) + }; + + (($done:expr)) => { + $done + }; +} + +#[macro_export(local_inner_macros)] +#[doc(hidden)] +macro_rules! quote_each_token { + ($tokens:ident $span:ident) => {}; + + ($tokens:ident $span:ident # ! $($rest:tt)*) => { + quote_each_token!($tokens $span #); + quote_each_token!($tokens $span !); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident # ( $($inner:tt)* ) * $($rest:tt)*) => { + for pounded_var_names!(nested_tuples_pat () $($inner)*) + in pounded_var_names!(multi_zip_expr () $($inner)*) { + quote_each_token!($tokens $span $($inner)*); + } + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident # ( $($inner:tt)* ) $sep:tt * $($rest:tt)*) => { + for (_i, pounded_var_names!(nested_tuples_pat () $($inner)*)) + in pounded_var_names!(multi_zip_expr () $($inner)*).into_iter().enumerate() { + if _i > 0 { + quote_each_token!($tokens $span $sep); + } + quote_each_token!($tokens $span $($inner)*); + } + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident # [ $($inner:tt)* ] $($rest:tt)*) => { + quote_each_token!($tokens $span #); + $tokens.extend({ + let mut g = $crate::__rt::Group::new( + $crate::__rt::Delimiter::Bracket, + quote_spanned!($span=> $($inner)*), + ); + g.set_span($span); + Some($crate::__rt::TokenTree::from(g)) + }); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident # $first:ident $($rest:tt)*) => { + $crate::ToTokens::to_tokens(&$first, &mut $tokens); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident ( $($first:tt)* ) $($rest:tt)*) => { + $tokens.extend({ + let mut g = $crate::__rt::Group::new( + $crate::__rt::Delimiter::Parenthesis, + quote_spanned!($span=> $($first)*), + ); + g.set_span($span); + Some($crate::__rt::TokenTree::from(g)) + }); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident [ $($first:tt)* ] $($rest:tt)*) => { + $tokens.extend({ + let mut g = $crate::__rt::Group::new( + $crate::__rt::Delimiter::Bracket, + quote_spanned!($span=> $($first)*), + ); + g.set_span($span); + Some($crate::__rt::TokenTree::from(g)) + }); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident { $($first:tt)* } $($rest:tt)*) => { + $tokens.extend({ + let mut g = $crate::__rt::Group::new( + $crate::__rt::Delimiter::Brace, + quote_spanned!($span=> $($first)*), + ); + g.set_span($span); + Some($crate::__rt::TokenTree::from(g)) + }); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident + $($rest:tt)*) => { + $crate::__rt::push_add(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident += $($rest:tt)*) => { + $crate::__rt::push_add_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident & $($rest:tt)*) => { + $crate::__rt::push_and(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident && $($rest:tt)*) => { + $crate::__rt::push_and_and(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident &= $($rest:tt)*) => { + $crate::__rt::push_and_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident @ $($rest:tt)*) => { + $crate::__rt::push_at(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident ! $($rest:tt)*) => { + $crate::__rt::push_bang(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident ^ $($rest:tt)*) => { + $crate::__rt::push_caret(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident ^= $($rest:tt)*) => { + $crate::__rt::push_caret_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident : $($rest:tt)*) => { + $crate::__rt::push_colon(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident :: $($rest:tt)*) => { + $crate::__rt::push_colon2(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident , $($rest:tt)*) => { + $crate::__rt::push_comma(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident / $($rest:tt)*) => { + $crate::__rt::push_div(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident /= $($rest:tt)*) => { + $crate::__rt::push_div_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident . $($rest:tt)*) => { + $crate::__rt::push_dot(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident .. $($rest:tt)*) => { + $crate::__rt::push_dot2(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident ... $($rest:tt)*) => { + $crate::__rt::push_dot3(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident ..= $($rest:tt)*) => { + $crate::__rt::push_dot_dot_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident = $($rest:tt)*) => { + $crate::__rt::push_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident == $($rest:tt)*) => { + $crate::__rt::push_eq_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident >= $($rest:tt)*) => { + $crate::__rt::push_ge(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident > $($rest:tt)*) => { + $crate::__rt::push_gt(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident <= $($rest:tt)*) => { + $crate::__rt::push_le(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident < $($rest:tt)*) => { + $crate::__rt::push_lt(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident *= $($rest:tt)*) => { + $crate::__rt::push_mul_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident != $($rest:tt)*) => { + $crate::__rt::push_ne(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident | $($rest:tt)*) => { + $crate::__rt::push_or(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident |= $($rest:tt)*) => { + $crate::__rt::push_or_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident || $($rest:tt)*) => { + $crate::__rt::push_or_or(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident # $($rest:tt)*) => { + $crate::__rt::push_pound(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident ? $($rest:tt)*) => { + $crate::__rt::push_question(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident -> $($rest:tt)*) => { + $crate::__rt::push_rarrow(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident <- $($rest:tt)*) => { + $crate::__rt::push_larrow(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident % $($rest:tt)*) => { + $crate::__rt::push_rem(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident %= $($rest:tt)*) => { + $crate::__rt::push_rem_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident => $($rest:tt)*) => { + $crate::__rt::push_fat_arrow(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident ; $($rest:tt)*) => { + $crate::__rt::push_semi(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident << $($rest:tt)*) => { + $crate::__rt::push_shl(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident <<= $($rest:tt)*) => { + $crate::__rt::push_shl_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident >> $($rest:tt)*) => { + $crate::__rt::push_shr(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident >>= $($rest:tt)*) => { + $crate::__rt::push_shr_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident * $($rest:tt)*) => { + $crate::__rt::push_star(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident - $($rest:tt)*) => { + $crate::__rt::push_sub(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident -= $($rest:tt)*) => { + $crate::__rt::push_sub_eq(&mut $tokens, $span); + quote_each_token!($tokens $span $($rest)*); + }; + + ($tokens:ident $span:ident $first:tt $($rest:tt)*) => { + $crate::__rt::parse(&mut $tokens, $span, quote_stringify!($first)); + quote_each_token!($tokens $span $($rest)*); + }; +} + +// Unhygienically invoke whatever `stringify` the caller has in scope i.e. not a +// local macro. The macros marked `local_inner_macros` above cannot invoke +// `stringify` directly. +#[macro_export] +#[doc(hidden)] +macro_rules! quote_stringify { + ($tt:tt) => { + stringify!($tt) + }; +} diff --git a/rust/vendor/quote-0.6.13/src/runtime.rs b/rust/vendor/quote-0.6.13/src/runtime.rs new file mode 100644 index 0000000..75337c9 --- /dev/null +++ b/rust/vendor/quote-0.6.13/src/runtime.rs @@ -0,0 +1,108 @@ +use ext::TokenStreamExt; +pub use proc_macro2::*; + +fn is_ident_start(c: u8) -> bool { + (b'a' <= c && c <= b'z') || (b'A' <= c && c <= b'Z') || c == b'_' +} + +fn is_ident_continue(c: u8) -> bool { + (b'a' <= c && c <= b'z') || (b'A' <= c && c <= b'Z') || c == b'_' || (b'0' <= c && c <= b'9') +} + +fn is_ident(token: &str) -> bool { + let mut iter = token.bytes(); + let first_ok = iter.next().map(is_ident_start).unwrap_or(false); + + first_ok && iter.all(is_ident_continue) +} + +pub fn parse(tokens: &mut TokenStream, span: Span, s: &str) { + if is_ident(s) { + // Fast path, since idents are the most common token. + tokens.append(Ident::new(s, span)); + } else { + let s: TokenStream = s.parse().expect("invalid token stream"); + tokens.extend(s.into_iter().map(|mut t| { + t.set_span(span); + t + })); + } +} + +macro_rules! push_punct { + ($name:ident $char1:tt) => { + pub fn $name(tokens: &mut TokenStream, span: Span) { + let mut punct = Punct::new($char1, Spacing::Alone); + punct.set_span(span); + tokens.append(punct); + } + }; + ($name:ident $char1:tt $char2:tt) => { + pub fn $name(tokens: &mut TokenStream, span: Span) { + let mut punct = Punct::new($char1, Spacing::Joint); + punct.set_span(span); + tokens.append(punct); + let mut punct = Punct::new($char2, Spacing::Alone); + punct.set_span(span); + tokens.append(punct); + } + }; + ($name:ident $char1:tt $char2:tt $char3:tt) => { + pub fn $name(tokens: &mut TokenStream, span: Span) { + let mut punct = Punct::new($char1, Spacing::Joint); + punct.set_span(span); + tokens.append(punct); + let mut punct = Punct::new($char2, Spacing::Joint); + punct.set_span(span); + tokens.append(punct); + let mut punct = Punct::new($char3, Spacing::Alone); + punct.set_span(span); + tokens.append(punct); + } + }; +} + +push_punct!(push_add '+'); +push_punct!(push_add_eq '+' '='); +push_punct!(push_and '&'); +push_punct!(push_and_and '&' '&'); +push_punct!(push_and_eq '&' '='); +push_punct!(push_at '@'); +push_punct!(push_bang '!'); +push_punct!(push_caret '^'); +push_punct!(push_caret_eq '^' '='); +push_punct!(push_colon ':'); +push_punct!(push_colon2 ':' ':'); +push_punct!(push_comma ','); +push_punct!(push_div '/'); +push_punct!(push_div_eq '/' '='); +push_punct!(push_dot '.'); +push_punct!(push_dot2 '.' '.'); +push_punct!(push_dot3 '.' '.' '.'); +push_punct!(push_dot_dot_eq '.' '.' '='); +push_punct!(push_eq '='); +push_punct!(push_eq_eq '=' '='); +push_punct!(push_ge '>' '='); +push_punct!(push_gt '>'); +push_punct!(push_le '<' '='); +push_punct!(push_lt '<'); +push_punct!(push_mul_eq '*' '='); +push_punct!(push_ne '!' '='); +push_punct!(push_or '|'); +push_punct!(push_or_eq '|' '='); +push_punct!(push_or_or '|' '|'); +push_punct!(push_pound '#'); +push_punct!(push_question '?'); +push_punct!(push_rarrow '-' '>'); +push_punct!(push_larrow '<' '-'); +push_punct!(push_rem '%'); +push_punct!(push_rem_eq '%' '='); +push_punct!(push_fat_arrow '=' '>'); +push_punct!(push_semi ';'); +push_punct!(push_shl '<' '<'); +push_punct!(push_shl_eq '<' '<' '='); +push_punct!(push_shr '>' '>'); +push_punct!(push_shr_eq '>' '>' '='); +push_punct!(push_star '*'); +push_punct!(push_sub '-'); +push_punct!(push_sub_eq '-' '='); diff --git a/rust/vendor/quote-0.6.13/src/to_tokens.rs b/rust/vendor/quote-0.6.13/src/to_tokens.rs new file mode 100644 index 0000000..9d221b2 --- /dev/null +++ b/rust/vendor/quote-0.6.13/src/to_tokens.rs @@ -0,0 +1,205 @@ +use super::TokenStreamExt; + +use std::borrow::Cow; +use std::iter; +use std::rc::Rc; + +use proc_macro2::{Group, Ident, Literal, Punct, Span, TokenStream, TokenTree}; + +/// Types that can be interpolated inside a [`quote!`] invocation. +/// +/// [`quote!`]: macro.quote.html +pub trait ToTokens { + /// Write `self` to the given `TokenStream`. + /// + /// The token append methods provided by the [`TokenStreamExt`] extension + /// trait may be useful for implementing `ToTokens`. + /// + /// [`TokenStreamExt`]: trait.TokenStreamExt.html + /// + /// # Example + /// + /// Example implementation for a struct representing Rust paths like + /// `std::cmp::PartialEq`: + /// + /// ```edition2018 + /// use proc_macro2::{TokenTree, Spacing, Span, Punct, TokenStream}; + /// use quote::{TokenStreamExt, ToTokens}; + /// + /// pub struct Path { + /// pub global: bool, + /// pub segments: Vec<PathSegment>, + /// } + /// + /// impl ToTokens for Path { + /// fn to_tokens(&self, tokens: &mut TokenStream) { + /// for (i, segment) in self.segments.iter().enumerate() { + /// if i > 0 || self.global { + /// // Double colon `::` + /// tokens.append(Punct::new(':', Spacing::Joint)); + /// tokens.append(Punct::new(':', Spacing::Alone)); + /// } + /// segment.to_tokens(tokens); + /// } + /// } + /// } + /// # + /// # pub struct PathSegment; + /// # + /// # impl ToTokens for PathSegment { + /// # fn to_tokens(&self, tokens: &mut TokenStream) { + /// # unimplemented!() + /// # } + /// # } + /// ``` + fn to_tokens(&self, tokens: &mut TokenStream); + + /// Convert `self` directly into a `TokenStream` object. + /// + /// This method is implicitly implemented using `to_tokens`, and acts as a + /// convenience method for consumers of the `ToTokens` trait. + fn into_token_stream(self) -> TokenStream + where + Self: Sized, + { + let mut tokens = TokenStream::new(); + self.to_tokens(&mut tokens); + tokens + } +} + +impl<'a, T: ?Sized + ToTokens> ToTokens for &'a T { + fn to_tokens(&self, tokens: &mut TokenStream) { + (**self).to_tokens(tokens); + } +} + +impl<'a, T: ?Sized + ToTokens> ToTokens for &'a mut T { + fn to_tokens(&self, tokens: &mut TokenStream) { + (**self).to_tokens(tokens); + } +} + +impl<'a, T: ?Sized + ToOwned + ToTokens> ToTokens for Cow<'a, T> { + fn to_tokens(&self, tokens: &mut TokenStream) { + (**self).to_tokens(tokens); + } +} + +impl<T: ?Sized + ToTokens> ToTokens for Box<T> { + fn to_tokens(&self, tokens: &mut TokenStream) { + (**self).to_tokens(tokens); + } +} + +impl<T: ?Sized + ToTokens> ToTokens for Rc<T> { + fn to_tokens(&self, tokens: &mut TokenStream) { + (**self).to_tokens(tokens); + } +} + +impl<T: ToTokens> ToTokens for Option<T> { + fn to_tokens(&self, tokens: &mut TokenStream) { + if let Some(ref t) = *self { + t.to_tokens(tokens); + } + } +} + +impl ToTokens for str { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append(Literal::string(self)); + } +} + +impl ToTokens for String { + fn to_tokens(&self, tokens: &mut TokenStream) { + self.as_str().to_tokens(tokens); + } +} + +macro_rules! primitive { + ($($t:ident => $name:ident)*) => ($( + impl ToTokens for $t { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append(Literal::$name(*self)); + } + } + )*) +} + +primitive! { + i8 => i8_suffixed + i16 => i16_suffixed + i32 => i32_suffixed + i64 => i64_suffixed + isize => isize_suffixed + + u8 => u8_suffixed + u16 => u16_suffixed + u32 => u32_suffixed + u64 => u64_suffixed + usize => usize_suffixed + + f32 => f32_suffixed + f64 => f64_suffixed +} + +#[cfg(integer128)] +primitive! { + i128 => i128_suffixed + u128 => u128_suffixed +} + +impl ToTokens for char { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append(Literal::character(*self)); + } +} + +impl ToTokens for bool { + fn to_tokens(&self, tokens: &mut TokenStream) { + let word = if *self { "true" } else { "false" }; + tokens.append(Ident::new(word, Span::call_site())); + } +} + +impl ToTokens for Group { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append(self.clone()); + } +} + +impl ToTokens for Ident { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append(self.clone()); + } +} + +impl ToTokens for Punct { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append(self.clone()); + } +} + +impl ToTokens for Literal { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append(self.clone()); + } +} + +impl ToTokens for TokenTree { + fn to_tokens(&self, dst: &mut TokenStream) { + dst.append(self.clone()); + } +} + +impl ToTokens for TokenStream { + fn to_tokens(&self, dst: &mut TokenStream) { + dst.extend(iter::once(self.clone())); + } + + fn into_token_stream(self) -> TokenStream { + self + } +} diff --git a/rust/vendor/quote-0.6.13/tests/conditional/integer128.rs b/rust/vendor/quote-0.6.13/tests/conditional/integer128.rs new file mode 100644 index 0000000..61e2274 --- /dev/null +++ b/rust/vendor/quote-0.6.13/tests/conditional/integer128.rs @@ -0,0 +1,11 @@ +#[test] +fn test_integer128() { + let ii128 = -1i128; + let uu128 = 1u128; + + let tokens = quote! { + #ii128 #uu128 + }; + let expected = "-1i128 1u128"; + assert_eq!(expected, tokens.to_string()); +} diff --git a/rust/vendor/quote-0.6.13/tests/test.rs b/rust/vendor/quote-0.6.13/tests/test.rs new file mode 100644 index 0000000..85562bf --- /dev/null +++ b/rust/vendor/quote-0.6.13/tests/test.rs @@ -0,0 +1,295 @@ +#![cfg_attr(feature = "cargo-clippy", allow(blacklisted_name))] + +use std::borrow::Cow; + +extern crate proc_macro2; +#[macro_use] +extern crate quote; + +use proc_macro2::{Ident, Span, TokenStream}; +use quote::TokenStreamExt; + +mod conditional { + #[cfg(integer128)] + mod integer128; +} + +struct X; + +impl quote::ToTokens for X { + fn to_tokens(&self, tokens: &mut TokenStream) { + tokens.append(Ident::new("X", Span::call_site())); + } +} + +#[test] +fn test_quote_impl() { + let tokens = quote! { + impl<'a, T: ToTokens> ToTokens for &'a T { + fn to_tokens(&self, tokens: &mut TokenStream) { + (**self).to_tokens(tokens) + } + } + }; + + let expected = concat!( + "impl < 'a , T : ToTokens > ToTokens for & 'a T { ", + "fn to_tokens ( & self , tokens : & mut TokenStream ) { ", + "( * * self ) . to_tokens ( tokens ) ", + "} ", + "}" + ); + + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_substitution() { + let x = X; + let tokens = quote!(#x <#x> (#x) [#x] {#x}); + + let expected = "X < X > ( X ) [ X ] { X }"; + + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_iter() { + let primes = &[X, X, X, X]; + + assert_eq!("X X X X", quote!(#(#primes)*).to_string()); + + assert_eq!("X , X , X , X ,", quote!(#(#primes,)*).to_string()); + + assert_eq!("X , X , X , X", quote!(#(#primes),*).to_string()); +} + +#[test] +fn test_advanced() { + let generics = quote!( <'a, T> ); + + let where_clause = quote!( where T: Serialize ); + + let field_ty = quote!(String); + + let item_ty = quote!(Cow<'a, str>); + + let path = quote!(SomeTrait::serialize_with); + + let value = quote!(self.x); + + let tokens = quote! { + struct SerializeWith #generics #where_clause { + value: &'a #field_ty, + phantom: ::std::marker::PhantomData<#item_ty>, + } + + impl #generics ::serde::Serialize for SerializeWith #generics #where_clause { + fn serialize<S>(&self, s: &mut S) -> Result<(), S::Error> + where S: ::serde::Serializer + { + #path(self.value, s) + } + } + + SerializeWith { + value: #value, + phantom: ::std::marker::PhantomData::<#item_ty>, + } + }; + + let expected = concat!( + "struct SerializeWith < 'a , T > where T : Serialize { ", + "value : & 'a String , ", + "phantom : :: std :: marker :: PhantomData < Cow < 'a , str > > , ", + "} ", + "impl < 'a , T > :: serde :: Serialize for SerializeWith < 'a , T > where T : Serialize { ", + "fn serialize < S > ( & self , s : & mut S ) -> Result < ( ) , S :: Error > ", + "where S : :: serde :: Serializer ", + "{ ", + "SomeTrait :: serialize_with ( self . value , s ) ", + "} ", + "} ", + "SerializeWith { ", + "value : self . x , ", + "phantom : :: std :: marker :: PhantomData :: < Cow < 'a , str > > , ", + "}" + ); + + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_integer() { + let ii8 = -1i8; + let ii16 = -1i16; + let ii32 = -1i32; + let ii64 = -1i64; + let iisize = -1isize; + let uu8 = 1u8; + let uu16 = 1u16; + let uu32 = 1u32; + let uu64 = 1u64; + let uusize = 1usize; + + let tokens = quote! { + #ii8 #ii16 #ii32 #ii64 #iisize + #uu8 #uu16 #uu32 #uu64 #uusize + }; + let expected = "-1i8 -1i16 -1i32 -1i64 -1isize 1u8 1u16 1u32 1u64 1usize"; + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_floating() { + let e32 = 2.345f32; + + let e64 = 2.345f64; + + let tokens = quote! { + #e32 + #e64 + }; + let expected = concat!("2.345f32 2.345f64"); + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_char() { + let zero = '\0'; + let pound = '#'; + let quote = '"'; + let apost = '\''; + let newline = '\n'; + let heart = '\u{2764}'; + + let tokens = quote! { + #zero #pound #quote #apost #newline #heart + }; + let expected = "'\\u{0}' '#' '\"' '\\'' '\\n' '\\u{2764}'"; + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_str() { + let s = "\0 a 'b \" c"; + let tokens = quote!(#s); + let expected = "\"\\u{0} a 'b \\\" c\""; + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_string() { + let s = "\0 a 'b \" c".to_string(); + let tokens = quote!(#s); + let expected = "\"\\u{0} a 'b \\\" c\""; + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_ident() { + let foo = Ident::new("Foo", Span::call_site()); + let bar = Ident::new(&format!("Bar{}", 7), Span::call_site()); + let tokens = quote!(struct #foo; enum #bar {}); + let expected = "struct Foo ; enum Bar7 { }"; + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_duplicate() { + let ch = 'x'; + + let tokens = quote!(#ch #ch); + + let expected = "'x' 'x'"; + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_fancy_repetition() { + let foo = vec!["a", "b"]; + let bar = vec![true, false]; + + let tokens = quote! { + #(#foo: #bar),* + }; + + let expected = r#""a" : true , "b" : false"#; + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_nested_fancy_repetition() { + let nested = vec![vec!['a', 'b', 'c'], vec!['x', 'y', 'z']]; + + let tokens = quote! { + #( + #(#nested)* + ),* + }; + + let expected = "'a' 'b' 'c' , 'x' 'y' 'z'"; + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_empty_repetition() { + let tokens = quote!(#(a b)* #(c d),*); + assert_eq!("", tokens.to_string()); +} + +#[test] +fn test_variable_name_conflict() { + // The implementation of `#(...),*` uses the variable `_i` but it should be + // fine, if a little confusing when debugging. + let _i = vec!['a', 'b']; + let tokens = quote! { #(#_i),* }; + let expected = "'a' , 'b'"; + assert_eq!(expected, tokens.to_string()); +} + +#[test] +fn test_empty_quote() { + let tokens = quote!(); + assert_eq!("", tokens.to_string()); +} + +#[test] +fn test_box_str() { + let b = "str".to_owned().into_boxed_str(); + let tokens = quote! { #b }; + assert_eq!("\"str\"", tokens.to_string()); +} + +#[test] +fn test_cow() { + let owned: Cow<Ident> = Cow::Owned(Ident::new("owned", Span::call_site())); + + let ident = Ident::new("borrowed", Span::call_site()); + let borrowed = Cow::Borrowed(&ident); + + let tokens = quote! { #owned #borrowed }; + assert_eq!("owned borrowed", tokens.to_string()); +} + +#[test] +fn test_closure() { + fn field_i(i: usize) -> Ident { + Ident::new(&format!("__field{}", i), Span::call_site()) + } + + let fields = (0usize..3) + .map(field_i as fn(_) -> _) + .map(|var| quote! { #var }); + + let tokens = quote! { #(#fields)* }; + assert_eq!("__field0 __field1 __field2", tokens.to_string()); +} + +#[test] +fn test_append_tokens() { + let mut a = quote!(a); + let b = quote!(b); + a.append_all(b); + assert_eq!("a b", a.to_string()); +} |