diff options
Diffstat (limited to 'vendor/proc-macro-error-attr')
| -rw-r--r-- | vendor/proc-macro-error-attr/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | vendor/proc-macro-error-attr/Cargo.toml | 33 | ||||
| -rw-r--r-- | vendor/proc-macro-error-attr/LICENSE-APACHE | 201 | ||||
| -rw-r--r-- | vendor/proc-macro-error-attr/LICENSE-MIT | 21 | ||||
| -rw-r--r-- | vendor/proc-macro-error-attr/build.rs | 5 | ||||
| -rw-r--r-- | vendor/proc-macro-error-attr/src/lib.rs | 121 | ||||
| -rw-r--r-- | vendor/proc-macro-error-attr/src/parse.rs | 89 | ||||
| -rw-r--r-- | vendor/proc-macro-error-attr/src/settings.rs | 72 |
8 files changed, 543 insertions, 0 deletions
diff --git a/vendor/proc-macro-error-attr/.cargo-checksum.json b/vendor/proc-macro-error-attr/.cargo-checksum.json new file mode 100644 index 000000000..c30b5418a --- /dev/null +++ b/vendor/proc-macro-error-attr/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"Cargo.toml":"fbd3ce928441a0b43859bbbe36549f05e7a1ebfee62e5982710671a8f41de527","LICENSE-APACHE":"6fd0f3522047150ca7c1939f02bc4a15662a4741a89bc03ae784eefa18caa299","LICENSE-MIT":"544b3aed1fd723d0cadea567affdcfe0431e43e18d997a718f9d67256b814fde","build.rs":"37b0aca3c4a14dfc050c2df38ae633311d7a1532cdbb8eb57182802c4a1983eb","src/lib.rs":"9e3d13c266376b688642572bb4091e094ff5277fce4bee72bcc3c5f982dd831c","src/parse.rs":"2d8f220f91235be8ed0ddcab55ec3699b9d3b28d538ed24197797cc20194c473","src/settings.rs":"be9382479d7a857b55e5a0b1014f72150c9ee7f2bbb5a5bdeabc0f8de2d95c26"},"package":"a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"}
\ No newline at end of file diff --git a/vendor/proc-macro-error-attr/Cargo.toml b/vendor/proc-macro-error-attr/Cargo.toml new file mode 100644 index 000000000..a2c766de9 --- /dev/null +++ b/vendor/proc-macro-error-attr/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] +edition = "2018" +name = "proc-macro-error-attr" +version = "1.0.4" +authors = ["CreepySkeleton <creepy-skeleton@yandex.ru>"] +build = "build.rs" +description = "Attribute macro for proc-macro-error crate" +license = "MIT OR Apache-2.0" +repository = "https://gitlab.com/CreepySkeleton/proc-macro-error" +[package.metadata.docs.rs] +targets = ["x86_64-unknown-linux-gnu"] + +[lib] +proc-macro = true +[dependencies.proc-macro2] +version = "1" + +[dependencies.quote] +version = "1" +[build-dependencies.version_check] +version = "0.9" diff --git a/vendor/proc-macro-error-attr/LICENSE-APACHE b/vendor/proc-macro-error-attr/LICENSE-APACHE new file mode 100644 index 000000000..658240a84 --- /dev/null +++ b/vendor/proc-macro-error-attr/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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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 + identification within third-party archives. + +Copyright 2019-2020 CreepySkeleton <creepy-skeleton@yandex.ru> + +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 +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. diff --git a/vendor/proc-macro-error-attr/LICENSE-MIT b/vendor/proc-macro-error-attr/LICENSE-MIT new file mode 100644 index 000000000..fc73e591d --- /dev/null +++ b/vendor/proc-macro-error-attr/LICENSE-MIT @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2019-2020 CreepySkeleton + +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/proc-macro-error-attr/build.rs b/vendor/proc-macro-error-attr/build.rs new file mode 100644 index 000000000..f2ac6a70e --- /dev/null +++ b/vendor/proc-macro-error-attr/build.rs @@ -0,0 +1,5 @@ +fn main() { + if version_check::is_max_version("1.36.0").unwrap_or(false) { + println!("cargo:rustc-cfg=always_assert_unwind"); + } +} diff --git a/vendor/proc-macro-error-attr/src/lib.rs b/vendor/proc-macro-error-attr/src/lib.rs new file mode 100644 index 000000000..ac0ac21a2 --- /dev/null +++ b/vendor/proc-macro-error-attr/src/lib.rs @@ -0,0 +1,121 @@ +//! This is `#[proc_macro_error]` attribute to be used with +//! [`proc-macro-error`](https://docs.rs/proc-macro-error/). There you go. + +extern crate proc_macro; + +use crate::parse::parse_input; +use crate::parse::Attribute; +use proc_macro::TokenStream; +use proc_macro2::{Literal, Span, TokenStream as TokenStream2, TokenTree}; +use quote::{quote, quote_spanned}; + +use crate::settings::{Setting::*, *}; + +mod parse; +mod settings; + +type Result<T> = std::result::Result<T, Error>; + +struct Error { + span: Span, + message: String, +} + +impl Error { + fn new(span: Span, message: String) -> Self { + Error { span, message } + } + + fn into_compile_error(self) -> TokenStream2 { + let mut message = Literal::string(&self.message); + message.set_span(self.span); + quote_spanned!(self.span=> compile_error!{#message}) + } +} + +#[proc_macro_attribute] +pub fn proc_macro_error(attr: TokenStream, input: TokenStream) -> TokenStream { + match impl_proc_macro_error(attr.into(), input.clone().into()) { + Ok(ts) => ts, + Err(e) => { + let error = e.into_compile_error(); + let input = TokenStream2::from(input); + + quote!(#input #error).into() + } + } +} + +fn impl_proc_macro_error(attr: TokenStream2, input: TokenStream2) -> Result<TokenStream> { + let (attrs, signature, body) = parse_input(input)?; + let mut settings = parse_settings(attr)?; + + let is_proc_macro = is_proc_macro(&attrs); + if is_proc_macro { + settings.set(AssertUnwindSafe); + } + + if detect_proc_macro_hack(&attrs) { + settings.set(ProcMacroHack); + } + + if settings.is_set(ProcMacroHack) { + settings.set(AllowNotMacro); + } + + if !(settings.is_set(AllowNotMacro) || is_proc_macro) { + return Err(Error::new( + Span::call_site(), + "#[proc_macro_error] attribute can be used only with procedural macros\n\n \ + = hint: if you are really sure that #[proc_macro_error] should be applied \ + to this exact function, use #[proc_macro_error(allow_not_macro)]\n" + .into(), + )); + } + + let body = gen_body(body, settings); + + let res = quote! { + #(#attrs)* + #(#signature)* + { #body } + }; + Ok(res.into()) +} + +#[cfg(not(always_assert_unwind))] +fn gen_body(block: TokenTree, settings: Settings) -> proc_macro2::TokenStream { + let is_proc_macro_hack = settings.is_set(ProcMacroHack); + let closure = if settings.is_set(AssertUnwindSafe) { + quote!(::std::panic::AssertUnwindSafe(|| #block )) + } else { + quote!(|| #block) + }; + + quote!( ::proc_macro_error::entry_point(#closure, #is_proc_macro_hack) ) +} + +// FIXME: +// proc_macro::TokenStream does not implement UnwindSafe until 1.37.0. +// Considering this is the closure's return type the unwind safety check would fail +// for virtually every closure possible, the check is meaningless. +#[cfg(always_assert_unwind)] +fn gen_body(block: TokenTree, settings: Settings) -> proc_macro2::TokenStream { + let is_proc_macro_hack = settings.is_set(ProcMacroHack); + let closure = quote!(::std::panic::AssertUnwindSafe(|| #block )); + quote!( ::proc_macro_error::entry_point(#closure, #is_proc_macro_hack) ) +} + +fn detect_proc_macro_hack(attrs: &[Attribute]) -> bool { + attrs + .iter() + .any(|attr| attr.path_is_ident("proc_macro_hack")) +} + +fn is_proc_macro(attrs: &[Attribute]) -> bool { + attrs.iter().any(|attr| { + attr.path_is_ident("proc_macro") + || attr.path_is_ident("proc_macro_derive") + || attr.path_is_ident("proc_macro_attribute") + }) +} diff --git a/vendor/proc-macro-error-attr/src/parse.rs b/vendor/proc-macro-error-attr/src/parse.rs new file mode 100644 index 000000000..6f4663f80 --- /dev/null +++ b/vendor/proc-macro-error-attr/src/parse.rs @@ -0,0 +1,89 @@ +use crate::{Error, Result}; +use proc_macro2::{Delimiter, Ident, Span, TokenStream, TokenTree}; +use quote::ToTokens; +use std::iter::Peekable; + +pub(crate) fn parse_input( + input: TokenStream, +) -> Result<(Vec<Attribute>, Vec<TokenTree>, TokenTree)> { + let mut input = input.into_iter().peekable(); + let mut attrs = Vec::new(); + + while let Some(attr) = parse_next_attr(&mut input)? { + attrs.push(attr); + } + + let sig = parse_signature(&mut input); + let body = input.next().ok_or_else(|| { + Error::new( + Span::call_site(), + "`#[proc_macro_error]` can be applied only to functions".to_string(), + ) + })?; + + Ok((attrs, sig, body)) +} + +fn parse_next_attr( + input: &mut Peekable<impl Iterator<Item = TokenTree>>, +) -> Result<Option<Attribute>> { + let shebang = match input.peek() { + Some(TokenTree::Punct(ref punct)) if punct.as_char() == '#' => input.next().unwrap(), + _ => return Ok(None), + }; + + let group = match input.peek() { + Some(TokenTree::Group(ref group)) if group.delimiter() == Delimiter::Bracket => { + let res = group.clone(); + input.next(); + res + } + other => { + let span = other.map_or(Span::call_site(), |tt| tt.span()); + return Err(Error::new(span, "expected `[`".to_string())); + } + }; + + let path = match group.stream().into_iter().next() { + Some(TokenTree::Ident(ident)) => Some(ident), + _ => None, + }; + + Ok(Some(Attribute { + shebang, + group: TokenTree::Group(group), + path, + })) +} + +fn parse_signature(input: &mut Peekable<impl Iterator<Item = TokenTree>>) -> Vec<TokenTree> { + let mut sig = Vec::new(); + loop { + match input.peek() { + Some(TokenTree::Group(ref group)) if group.delimiter() == Delimiter::Brace => { + return sig; + } + None => return sig, + _ => sig.push(input.next().unwrap()), + } + } +} + +pub(crate) struct Attribute { + pub(crate) shebang: TokenTree, + pub(crate) group: TokenTree, + pub(crate) path: Option<Ident>, +} + +impl Attribute { + pub(crate) fn path_is_ident(&self, ident: &str) -> bool { + self.path.as_ref().map_or(false, |p| *p == ident) + } +} + +impl ToTokens for Attribute { + fn to_tokens(&self, ts: &mut TokenStream) { + self.shebang.to_tokens(ts); + self.group.to_tokens(ts); + } +} diff --git a/vendor/proc-macro-error-attr/src/settings.rs b/vendor/proc-macro-error-attr/src/settings.rs new file mode 100644 index 000000000..0b7ec766f --- /dev/null +++ b/vendor/proc-macro-error-attr/src/settings.rs @@ -0,0 +1,72 @@ +use crate::{Error, Result}; +use proc_macro2::{Ident, Span, TokenStream, TokenTree}; + +macro_rules! decl_settings { + ($($val:expr => $variant:ident),+ $(,)*) => { + #[derive(PartialEq)] + pub(crate) enum Setting { + $($variant),* + } + + fn ident_to_setting(ident: Ident) -> Result<Setting> { + match &*ident.to_string() { + $($val => Ok(Setting::$variant),)* + _ => { + let possible_vals = [$($val),*] + .iter() + .map(|v| format!("`{}`", v)) + .collect::<Vec<_>>() + .join(", "); + + Err(Error::new( + ident.span(), + format!("unknown setting `{}`, expected one of {}", ident, possible_vals))) + } + } + } + }; +} + +decl_settings! { + "assert_unwind_safe" => AssertUnwindSafe, + "allow_not_macro" => AllowNotMacro, + "proc_macro_hack" => ProcMacroHack, +} + +pub(crate) fn parse_settings(input: TokenStream) -> Result<Settings> { + let mut input = input.into_iter(); + let mut res = Settings(Vec::new()); + loop { + match input.next() { + Some(TokenTree::Ident(ident)) => { + res.0.push(ident_to_setting(ident)?); + } + None => return Ok(res), + other => { + let span = other.map_or(Span::call_site(), |tt| tt.span()); + return Err(Error::new(span, "expected identifier".to_string())); + } + } + + match input.next() { + Some(TokenTree::Punct(ref punct)) if punct.as_char() == ',' => {} + None => return Ok(res), + other => { + let span = other.map_or(Span::call_site(), |tt| tt.span()); + return Err(Error::new(span, "expected `,`".to_string())); + } + } + } +} + +pub(crate) struct Settings(Vec<Setting>); + +impl Settings { + pub(crate) fn is_set(&self, setting: Setting) -> bool { + self.0.iter().any(|s| *s == setting) + } + + pub(crate) fn set(&mut self, setting: Setting) { + self.0.push(setting) + } +} |