3 files changed, 0 insertions, 282 deletions
diff --git a/vendor/proc-macro-error-attr/src/lib.rs b/vendor/proc-macro-error-attr/src/lib.rs
deleted file mode 100644
index ac0ac21a2..000000000
--- a/vendor/proc-macro-error-attr/src/lib.rs
+++ /dev/null
@@ -1,121 +0,0 @@
-//! 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
deleted file mode 100644
index 6f4663f80..000000000
--- a/vendor/proc-macro-error-attr/src/parse.rs
+++ /dev/null
@@ -1,89 +0,0 @@
-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
deleted file mode 100644
index 0b7ec766f..000000000
--- a/vendor/proc-macro-error-attr/src/settings.rs
+++ /dev/null
@@ -1,72 +0,0 @@
-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)
-    }
-}