Deleted vendor folder

1 files changed, 0 insertions, 1143 deletions

diff --git a/vendor/proc-macro2/src/fallback.rs b/vendor/proc-macro2/src/fallback.rs
deleted file mode 100644
index 7b40427..0000000
--- a/vendor/proc-macro2/src/fallback.rs
+++ /dev/null
@@ -1,1143 +0,0 @@
-#[cfg(span_locations)]
-use crate::location::LineColumn;
-use crate::parse::{self, Cursor};
-use crate::rcvec::{RcVec, RcVecBuilder, RcVecIntoIter, RcVecMut};
-use crate::{Delimiter, Spacing, TokenTree};
-#[cfg(all(span_locations, not(fuzzing)))]
-use alloc::collections::BTreeMap;
-#[cfg(all(span_locations, not(fuzzing)))]
-use core::cell::RefCell;
-#[cfg(span_locations)]
-use core::cmp;
-use core::fmt::{self, Debug, Display, Write};
-use core::mem::ManuallyDrop;
-use core::ops::RangeBounds;
-use core::ptr;
-use core::str::FromStr;
-use std::path::PathBuf;
-
-/// Force use of proc-macro2's fallback implementation of the API for now, even
-/// if the compiler's implementation is available.
-pub fn force() {
-    #[cfg(wrap_proc_macro)]
-    crate::detection::force_fallback();
-}
-
-/// Resume using the compiler's implementation of the proc macro API if it is
-/// available.
-pub fn unforce() {
-    #[cfg(wrap_proc_macro)]
-    crate::detection::unforce_fallback();
-}
-
-#[derive(Clone)]
-pub(crate) struct TokenStream {
-    inner: RcVec<TokenTree>,
-}
-
-#[derive(Debug)]
-pub(crate) struct LexError {
-    pub(crate) span: Span,
-}
-
-impl LexError {
-    pub(crate) fn span(&self) -> Span {
-        self.span
-    }
-
-    pub(crate) fn call_site() -> Self {
-        LexError {
-            span: Span::call_site(),
-        }
-    }
-}
-
-impl TokenStream {
-    pub fn new() -> Self {
-        TokenStream {
-            inner: RcVecBuilder::new().build(),
-        }
-    }
-
-    pub fn is_empty(&self) -> bool {
-        self.inner.len() == 0
-    }
-
-    fn take_inner(self) -> RcVecBuilder<TokenTree> {
-        let nodrop = ManuallyDrop::new(self);
-        unsafe { ptr::read(&nodrop.inner) }.make_owned()
-    }
-}
-
-fn push_token_from_proc_macro(mut vec: RcVecMut<TokenTree>, token: TokenTree) {
-    // https://github.com/dtolnay/proc-macro2/issues/235
-    match token {
-        TokenTree::Literal(crate::Literal {
-            #[cfg(wrap_proc_macro)]
-                inner: crate::imp::Literal::Fallback(literal),
-            #[cfg(not(wrap_proc_macro))]
-                inner: literal,
-            ..
-        }) if literal.repr.starts_with('-') => {
-            push_negative_literal(vec, literal);
-        }
-        _ => vec.push(token),
-    }
-
-    #[cold]
-    fn push_negative_literal(mut vec: RcVecMut<TokenTree>, mut literal: Literal) {
-        literal.repr.remove(0);
-        let mut punct = crate::Punct::new('-', Spacing::Alone);
-        punct.set_span(crate::Span::_new_fallback(literal.span));
-        vec.push(TokenTree::Punct(punct));
-        vec.push(TokenTree::Literal(crate::Literal::_new_fallback(literal)));
-    }
-}
-
-// Nonrecursive to prevent stack overflow.
-impl Drop for TokenStream {
-    fn drop(&mut self) {
-        let mut inner = match self.inner.get_mut() {
-            Some(inner) => inner,
-            None => return,
-        };
-        while let Some(token) = inner.pop() {
-            let group = match token {
-                TokenTree::Group(group) => group.inner,
-                _ => continue,
-            };
-            #[cfg(wrap_proc_macro)]
-            let group = match group {
-                crate::imp::Group::Fallback(group) => group,
-                crate::imp::Group::Compiler(_) => continue,
-            };
-            inner.extend(group.stream.take_inner());
-        }
-    }
-}
-
-pub(crate) struct TokenStreamBuilder {
-    inner: RcVecBuilder<TokenTree>,
-}
-
-impl TokenStreamBuilder {
-    pub fn new() -> Self {
-        TokenStreamBuilder {
-            inner: RcVecBuilder::new(),
-        }
-    }
-
-    pub fn with_capacity(cap: usize) -> Self {
-        TokenStreamBuilder {
-            inner: RcVecBuilder::with_capacity(cap),
-        }
-    }
-
-    pub fn push_token_from_parser(&mut self, tt: TokenTree) {
-        self.inner.push(tt);
-    }
-
-    pub fn build(self) -> TokenStream {
-        TokenStream {
-            inner: self.inner.build(),
-        }
-    }
-}
-
-#[cfg(span_locations)]
-fn get_cursor(src: &str) -> Cursor {
-    #[cfg(fuzzing)]
-    return Cursor { rest: src, off: 1 };
-
-    // Create a dummy file & add it to the source map
-    #[cfg(not(fuzzing))]
-    SOURCE_MAP.with(|cm| {
-        let mut cm = cm.borrow_mut();
-        let span = cm.add_file(src);
-        Cursor {
-            rest: src,
-            off: span.lo,
-        }
-    })
-}
-
-#[cfg(not(span_locations))]
-fn get_cursor(src: &str) -> Cursor {
-    Cursor { rest: src }
-}
-
-impl FromStr for TokenStream {
-    type Err = LexError;
-
-    fn from_str(src: &str) -> Result<TokenStream, LexError> {
-        // Create a dummy file & add it to the source map
-        let mut cursor = get_cursor(src);
-
-        // Strip a byte order mark if present
-        const BYTE_ORDER_MARK: &str = "\u{feff}";
-        if cursor.starts_with(BYTE_ORDER_MARK) {
-            cursor = cursor.advance(BYTE_ORDER_MARK.len());
-        }
-
-        parse::token_stream(cursor)
-    }
-}
-
-impl Display for LexError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str("cannot parse string into token stream")
-    }
-}
-
-impl Display for TokenStream {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let mut joint = false;
-        for (i, tt) in self.inner.iter().enumerate() {
-            if i != 0 && !joint {
-                write!(f, " ")?;
-            }
-            joint = false;
-            match tt {
-                TokenTree::Group(tt) => Display::fmt(tt, f),
-                TokenTree::Ident(tt) => Display::fmt(tt, f),
-                TokenTree::Punct(tt) => {
-                    joint = tt.spacing() == Spacing::Joint;
-                    Display::fmt(tt, f)
-                }
-                TokenTree::Literal(tt) => Display::fmt(tt, f),
-            }?;
-        }
-
-        Ok(())
-    }
-}
-
-impl Debug for TokenStream {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.write_str("TokenStream ")?;
-        f.debug_list().entries(self.clone()).finish()
-    }
-}
-
-#[cfg(feature = "proc-macro")]
-impl From<proc_macro::TokenStream> for TokenStream {
-    fn from(inner: proc_macro::TokenStream) -> Self {
-        inner
-            .to_string()
-            .parse()
-            .expect("compiler token stream parse failed")
-    }
-}
-
-#[cfg(feature = "proc-macro")]
-impl From<TokenStream> for proc_macro::TokenStream {
-    fn from(inner: TokenStream) -> Self {
-        inner
-            .to_string()
-            .parse()
-            .expect("failed to parse to compiler tokens")
-    }
-}
-
-impl From<TokenTree> for TokenStream {
-    fn from(tree: TokenTree) -> Self {
-        let mut stream = RcVecBuilder::new();
-        push_token_from_proc_macro(stream.as_mut(), tree);
-        TokenStream {
-            inner: stream.build(),
-        }
-    }
-}
-
-impl FromIterator<TokenTree> for TokenStream {
-    fn from_iter<I: IntoIterator<Item = TokenTree>>(tokens: I) -> Self {
-        let mut stream = TokenStream::new();
-        stream.extend(tokens);
-        stream
-    }
-}
-
-impl FromIterator<TokenStream> for TokenStream {
-    fn from_iter<I: IntoIterator<Item = TokenStream>>(streams: I) -> Self {
-        let mut v = RcVecBuilder::new();
-
-        for stream in streams {
-            v.extend(stream.take_inner());
-        }
-
-        TokenStream { inner: v.build() }
-    }
-}
-
-impl Extend<TokenTree> for TokenStream {
-    fn extend<I: IntoIterator<Item = TokenTree>>(&mut self, tokens: I) {
-        let mut vec = self.inner.make_mut();
-        tokens
-            .into_iter()
-            .for_each(|token| push_token_from_proc_macro(vec.as_mut(), token));
-    }
-}
-
-impl Extend<TokenStream> for TokenStream {
-    fn extend<I: IntoIterator<Item = TokenStream>>(&mut self, streams: I) {
-        self.inner.make_mut().extend(streams.into_iter().flatten());
-    }
-}
-
-pub(crate) type TokenTreeIter = RcVecIntoIter<TokenTree>;
-
-impl IntoIterator for TokenStream {
-    type Item = TokenTree;
-    type IntoIter = TokenTreeIter;
-
-    fn into_iter(self) -> TokenTreeIter {
-        self.take_inner().into_iter()
-    }
-}
-
-#[derive(Clone, PartialEq, Eq)]
-pub(crate) struct SourceFile {
-    path: PathBuf,
-}
-
-impl SourceFile {
-    /// Get the path to this source file as a string.
-    pub fn path(&self) -> PathBuf {
-        self.path.clone()
-    }
-
-    pub fn is_real(&self) -> bool {
-        false
-    }
-}
-
-impl Debug for SourceFile {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        f.debug_struct("SourceFile")
-            .field("path", &self.path())
-            .field("is_real", &self.is_real())
-            .finish()
-    }
-}
-
-#[cfg(all(span_locations, not(fuzzing)))]
-thread_local! {
-    static SOURCE_MAP: RefCell<SourceMap> = RefCell::new(SourceMap {
-        // Start with a single dummy file which all call_site() and def_site()
-        // spans reference.
-        files: vec![FileInfo {
-            source_text: String::new(),
-            span: Span { lo: 0, hi: 0 },
-            lines: vec![0],
-            char_index_to_byte_offset: BTreeMap::new(),
-        }],
-    });
-}
-
-#[cfg(all(span_locations, not(fuzzing)))]
-struct FileInfo {
-    source_text: String,
-    span: Span,
-    lines: Vec<usize>,
-    char_index_to_byte_offset: BTreeMap<usize, usize>,
-}
-
-#[cfg(all(span_locations, not(fuzzing)))]
-impl FileInfo {
-    fn offset_line_column(&self, offset: usize) -> LineColumn {
-        assert!(self.span_within(Span {
-            lo: offset as u32,
-            hi: offset as u32,
-        }));
-        let offset = offset - self.span.lo as usize;
-        match self.lines.binary_search(&offset) {
-            Ok(found) => LineColumn {
-                line: found + 1,
-                column: 0,
-            },
-            Err(idx) => LineColumn {
-                line: idx,
-                column: offset - self.lines[idx - 1],
-            },
-        }
-    }
-
-    fn span_within(&self, span: Span) -> bool {
-        span.lo >= self.span.lo && span.hi <= self.span.hi
-    }
-
-    fn source_text(&mut self, span: Span) -> String {
-        let lo_char = (span.lo - self.span.lo) as usize;
-
-        // Look up offset of the largest already-computed char index that is
-        // less than or equal to the current requested one. We resume counting
-        // chars from that point.
-        let (&last_char_index, &last_byte_offset) = self
-            .char_index_to_byte_offset
-            .range(..=lo_char)
-            .next_back()
-            .unwrap_or((&0, &0));
-
-        let lo_byte = if last_char_index == lo_char {
-            last_byte_offset
-        } else {
-            let total_byte_offset = match self.source_text[last_byte_offset..]
-                .char_indices()
-                .nth(lo_char - last_char_index)
-            {
-                Some((additional_offset, _ch)) => last_byte_offset + additional_offset,
-                None => self.source_text.len(),
-            };
-            self.char_index_to_byte_offset
-                .insert(lo_char, total_byte_offset);
-            total_byte_offset
-        };
-
-        let trunc_lo = &self.source_text[lo_byte..];
-        let char_len = (span.hi - span.lo) as usize;
-        let source_text = match trunc_lo.char_indices().nth(char_len) {
-            Some((offset, _ch)) => &trunc_lo[..offset],
-            None => trunc_lo,
-        };
-        source_text.to_owned()
-    }
-}
-
-/// Computes the offsets of each line in the given source string
-/// and the total number of characters
-#[cfg(all(span_locations, not(fuzzing)))]
-fn lines_offsets(s: &str) -> (usize, Vec<usize>) {
-    let mut lines = vec![0];
-    let mut total = 0;
-
-    for ch in s.chars() {
-        total += 1;
-        if ch == '\n' {
-            lines.push(total);
-        }
-    }
-
-    (total, lines)
-}
-
-#[cfg(all(span_locations, not(fuzzing)))]
-struct SourceMap {
-    files: Vec<FileInfo>,
-}
-
-#[cfg(all(span_locations, not(fuzzing)))]
-impl SourceMap {
-    fn next_start_pos(&self) -> u32 {
-        // Add 1 so there's always space between files.
-        //
-        // We'll always have at least 1 file, as we initialize our files list
-        // with a dummy file.
-        self.files.last().unwrap().span.hi + 1
-    }
-
-    fn add_file(&mut self, src: &str) -> Span {
-        let (len, lines) = lines_offsets(src);
-        let lo = self.next_start_pos();
-        let span = Span {
-            lo,
-            hi: lo + (len as u32),
-        };
-
-        self.files.push(FileInfo {
-            source_text: src.to_owned(),
-            span,
-            lines,
-            // Populated lazily by source_text().
-            char_index_to_byte_offset: BTreeMap::new(),
-        });
-
-        span
-    }
-
-    #[cfg(procmacro2_semver_exempt)]
-    fn filepath(&self, span: Span) -> PathBuf {
-        for (i, file) in self.files.iter().enumerate() {
-            if file.span_within(span) {
-                return PathBuf::from(if i == 0 {
-                    "<unspecified>".to_owned()
-                } else {
-                    format!("<parsed string {}>", i)
-                });
-            }
-        }
-        unreachable!("Invalid span with no related FileInfo!");
-    }
-
-    fn fileinfo(&self, span: Span) -> &FileInfo {
-        for file in &self.files {
-            if file.span_within(span) {
-                return file;
-            }
-        }
-        unreachable!("Invalid span with no related FileInfo!");
-    }
-
-    fn fileinfo_mut(&mut self, span: Span) -> &mut FileInfo {
-        for file in &mut self.files {
-            if file.span_within(span) {
-                return file;
-            }
-        }
-        unreachable!("Invalid span with no related FileInfo!");
-    }
-}
-
-#[derive(Clone, Copy, PartialEq, Eq)]
-pub(crate) struct Span {
-    #[cfg(span_locations)]
-    pub(crate) lo: u32,
-    #[cfg(span_locations)]
-    pub(crate) hi: u32,
-}
-
-impl Span {
-    #[cfg(not(span_locations))]
-    pub fn call_site() -> Self {
-        Span {}
-    }
-
-    #[cfg(span_locations)]
-    pub fn call_site() -> Self {
-        Span { lo: 0, hi: 0 }
-    }
-
-    pub fn mixed_site() -> Self {
-        Span::call_site()
-    }
-
-    #[cfg(procmacro2_semver_exempt)]
-    pub fn def_site() -> Self {
-        Span::call_site()
-    }
-
-    pub fn resolved_at(&self, _other: Span) -> Span {
-        // Stable spans consist only of line/column information, so
-        // `resolved_at` and `located_at` only select which span the
-        // caller wants line/column information from.
-        *self
-    }
-
-    pub fn located_at(&self, other: Span) -> Span {
-        other
-    }
-
-    #[cfg(procmacro2_semver_exempt)]
-    pub fn source_file(&self) -> SourceFile {
-        #[cfg(fuzzing)]
-        return SourceFile {
-            path: PathBuf::from("<unspecified>"),
-        };
-
-        #[cfg(not(fuzzing))]
-        SOURCE_MAP.with(|cm| {
-            let cm = cm.borrow();
-            let path = cm.filepath(*self);
-            SourceFile { path }
-        })
-    }
-
-    #[cfg(span_locations)]
-    pub fn start(&self) -> LineColumn {
-        #[cfg(fuzzing)]
-        return LineColumn { line: 0, column: 0 };
-
-        #[cfg(not(fuzzing))]
-        SOURCE_MAP.with(|cm| {
-            let cm = cm.borrow();
-            let fi = cm.fileinfo(*self);
-            fi.offset_line_column(self.lo as usize)
-        })
-    }
-
-    #[cfg(span_locations)]
-    pub fn end(&self) -> LineColumn {
-        #[cfg(fuzzing)]
-        return LineColumn { line: 0, column: 0 };
-
-        #[cfg(not(fuzzing))]
-        SOURCE_MAP.with(|cm| {
-            let cm = cm.borrow();
-            let fi = cm.fileinfo(*self);
-            fi.offset_line_column(self.hi as usize)
-        })
-    }
-
-    #[cfg(not(span_locations))]
-    pub fn join(&self, _other: Span) -> Option<Span> {
-        Some(Span {})
-    }
-
-    #[cfg(span_locations)]
-    pub fn join(&self, other: Span) -> Option<Span> {
-        #[cfg(fuzzing)]
-        return {
-            let _ = other;
-            None
-        };
-
-        #[cfg(not(fuzzing))]
-        SOURCE_MAP.with(|cm| {
-            let cm = cm.borrow();
-            // If `other` is not within the same FileInfo as us, return None.
-            if !cm.fileinfo(*self).span_within(other) {
-                return None;
-            }
-            Some(Span {
-                lo: cmp::min(self.lo, other.lo),
-                hi: cmp::max(self.hi, other.hi),
-            })
-        })
-    }
-
-    #[cfg(not(span_locations))]
-    pub fn source_text(&self) -> Option<String> {
-        None
-    }
-
-    #[cfg(span_locations)]
-    pub fn source_text(&self) -> Option<String> {
-        #[cfg(fuzzing)]
-        return None;
-
-        #[cfg(not(fuzzing))]
-        {
-            if self.is_call_site() {
-                None
-            } else {
-                Some(SOURCE_MAP.with(|cm| cm.borrow_mut().fileinfo_mut(*self).source_text(*self)))
-            }
-        }
-    }
-
-    #[cfg(not(span_locations))]
-    pub(crate) fn first_byte(self) -> Self {
-        self
-    }
-
-    #[cfg(span_locations)]
-    pub(crate) fn first_byte(self) -> Self {
-        Span {
-            lo: self.lo,
-            hi: cmp::min(self.lo.saturating_add(1), self.hi),
-        }
-    }
-
-    #[cfg(not(span_locations))]
-    pub(crate) fn last_byte(self) -> Self {
-        self
-    }
-
-    #[cfg(span_locations)]
-    pub(crate) fn last_byte(self) -> Self {
-        Span {
-            lo: cmp::max(self.hi.saturating_sub(1), self.lo),
-            hi: self.hi,
-        }
-    }
-
-    #[cfg(span_locations)]
-    fn is_call_site(&self) -> bool {
-        self.lo == 0 && self.hi == 0
-    }
-}
-
-impl Debug for Span {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        #[cfg(span_locations)]
-        return write!(f, "bytes({}..{})", self.lo, self.hi);
-
-        #[cfg(not(span_locations))]
-        write!(f, "Span")
-    }
-}
-
-pub(crate) fn debug_span_field_if_nontrivial(debug: &mut fmt::DebugStruct, span: Span) {
-    #[cfg(span_locations)]
-    {
-        if span.is_call_site() {
-            return;
-        }
-    }
-
-    if cfg!(span_locations) {
-        debug.field("span", &span);
-    }
-}
-
-#[derive(Clone)]
-pub(crate) struct Group {
-    delimiter: Delimiter,
-    stream: TokenStream,
-    span: Span,
-}
-
-impl Group {
-    pub fn new(delimiter: Delimiter, stream: TokenStream) -> Self {
-        Group {
-            delimiter,
-            stream,
-            span: Span::call_site(),
-        }
-    }
-
-    pub fn delimiter(&self) -> Delimiter {
-        self.delimiter
-    }
-
-    pub fn stream(&self) -> TokenStream {
-        self.stream.clone()
-    }
-
-    pub fn span(&self) -> Span {
-        self.span
-    }
-
-    pub fn span_open(&self) -> Span {
-        self.span.first_byte()
-    }
-
-    pub fn span_close(&self) -> Span {
-        self.span.last_byte()
-    }
-
-    pub fn set_span(&mut self, span: Span) {
-        self.span = span;
-    }
-}
-
-impl Display for Group {
-    // We attempt to match libproc_macro's formatting.
-    // Empty parens: ()
-    // Nonempty parens: (...)
-    // Empty brackets: []
-    // Nonempty brackets: [...]
-    // Empty braces: { }
-    // Nonempty braces: { ... }
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let (open, close) = match self.delimiter {
-            Delimiter::Parenthesis => ("(", ")"),
-            Delimiter::Brace => ("{ ", "}"),
-            Delimiter::Bracket => ("[", "]"),
-            Delimiter::None => ("", ""),
-        };
-
-        f.write_str(open)?;
-        Display::fmt(&self.stream, f)?;
-        if self.delimiter == Delimiter::Brace && !self.stream.inner.is_empty() {
-            f.write_str(" ")?;
-        }
-        f.write_str(close)?;
-
-        Ok(())
-    }
-}
-
-impl Debug for Group {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        let mut debug = fmt.debug_struct("Group");
-        debug.field("delimiter", &self.delimiter);
-        debug.field("stream", &self.stream);
-        debug_span_field_if_nontrivial(&mut debug, self.span);
-        debug.finish()
-    }
-}
-
-#[derive(Clone)]
-pub(crate) struct Ident {
-    sym: String,
-    span: Span,
-    raw: bool,
-}
-
-impl Ident {
-    #[track_caller]
-    pub fn new_checked(string: &str, span: Span) -> Self {
-        validate_ident(string);
-        Ident::new_unchecked(string, span)
-    }
-
-    pub fn new_unchecked(string: &str, span: Span) -> Self {
-        Ident {
-            sym: string.to_owned(),
-            span,
-            raw: false,
-        }
-    }
-
-    #[track_caller]
-    pub fn new_raw_checked(string: &str, span: Span) -> Self {
-        validate_ident_raw(string);
-        Ident::new_raw_unchecked(string, span)
-    }
-
-    pub fn new_raw_unchecked(string: &str, span: Span) -> Self {
-        Ident {
-            sym: string.to_owned(),
-            span,
-            raw: true,
-        }
-    }
-
-    pub fn span(&self) -> Span {
-        self.span
-    }
-
-    pub fn set_span(&mut self, span: Span) {
-        self.span = span;
-    }
-}
-
-pub(crate) fn is_ident_start(c: char) -> bool {
-    c == '_' || unicode_ident::is_xid_start(c)
-}
-
-pub(crate) fn is_ident_continue(c: char) -> bool {
-    unicode_ident::is_xid_continue(c)
-}
-
-#[track_caller]
-fn validate_ident(string: &str) {
-    if string.is_empty() {
-        panic!("Ident is not allowed to be empty; use Option<Ident>");
-    }
-
-    if string.bytes().all(|digit| b'0' <= digit && digit <= b'9') {
-        panic!("Ident cannot be a number; use Literal instead");
-    }
-
-    fn ident_ok(string: &str) -> bool {
-        let mut chars = string.chars();
-        let first = chars.next().unwrap();
-        if !is_ident_start(first) {
-            return false;
-        }
-        for ch in chars {
-            if !is_ident_continue(ch) {
-                return false;
-            }
-        }
-        true
-    }
-
-    if !ident_ok(string) {
-        panic!("{:?} is not a valid Ident", string);
-    }
-}
-
-#[track_caller]
-fn validate_ident_raw(string: &str) {
-    validate_ident(string);
-
-    match string {
-        "_" | "super" | "self" | "Self" | "crate" => {
-            panic!("`r#{}` cannot be a raw identifier", string);
-        }
-        _ => {}
-    }
-}
-
-impl PartialEq for Ident {
-    fn eq(&self, other: &Ident) -> bool {
-        self.sym == other.sym && self.raw == other.raw
-    }
-}
-
-impl<T> PartialEq<T> for Ident
-where
-    T: ?Sized + AsRef<str>,
-{
-    fn eq(&self, other: &T) -> bool {
-        let other = other.as_ref();
-        if self.raw {
-            other.starts_with("r#") && self.sym == other[2..]
-        } else {
-            self.sym == other
-        }
-    }
-}
-
-impl Display for Ident {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        if self.raw {
-            f.write_str("r#")?;
-        }
-        Display::fmt(&self.sym, f)
-    }
-}
-
-#[allow(clippy::missing_fields_in_debug)]
-impl Debug for Ident {
-    // Ident(proc_macro), Ident(r#union)
-    #[cfg(not(span_locations))]
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let mut debug = f.debug_tuple("Ident");
-        debug.field(&format_args!("{}", self));
-        debug.finish()
-    }
-
-    // Ident {
-    //     sym: proc_macro,
-    //     span: bytes(128..138)
-    // }
-    #[cfg(span_locations)]
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let mut debug = f.debug_struct("Ident");
-        debug.field("sym", &format_args!("{}", self));
-        debug_span_field_if_nontrivial(&mut debug, self.span);
-        debug.finish()
-    }
-}
-
-#[derive(Clone)]
-pub(crate) struct Literal {
-    repr: String,
-    span: Span,
-}
-
-macro_rules! suffixed_numbers {
-    ($($name:ident => $kind:ident,)*) => ($(
-        pub fn $name(n: $kind) -> Literal {
-            Literal::_new(format!(concat!("{}", stringify!($kind)), n))
-        }
-    )*)
-}
-
-macro_rules! unsuffixed_numbers {
-    ($($name:ident => $kind:ident,)*) => ($(
-        pub fn $name(n: $kind) -> Literal {
-            Literal::_new(n.to_string())
-        }
-    )*)
-}
-
-impl Literal {
-    pub(crate) fn _new(repr: String) -> Self {
-        Literal {
-            repr,
-            span: Span::call_site(),
-        }
-    }
-
-    pub(crate) unsafe fn from_str_unchecked(repr: &str) -> Self {
-        Literal::_new(repr.to_owned())
-    }
-
-    suffixed_numbers! {
-        u8_suffixed => u8,
-        u16_suffixed => u16,
-        u32_suffixed => u32,
-        u64_suffixed => u64,
-        u128_suffixed => u128,
-        usize_suffixed => usize,
-        i8_suffixed => i8,
-        i16_suffixed => i16,
-        i32_suffixed => i32,
-        i64_suffixed => i64,
-        i128_suffixed => i128,
-        isize_suffixed => isize,
-
-        f32_suffixed => f32,
-        f64_suffixed => f64,
-    }
-
-    unsuffixed_numbers! {
-        u8_unsuffixed => u8,
-        u16_unsuffixed => u16,
-        u32_unsuffixed => u32,
-        u64_unsuffixed => u64,
-        u128_unsuffixed => u128,
-        usize_unsuffixed => usize,
-        i8_unsuffixed => i8,
-        i16_unsuffixed => i16,
-        i32_unsuffixed => i32,
-        i64_unsuffixed => i64,
-        i128_unsuffixed => i128,
-        isize_unsuffixed => isize,
-    }
-
-    pub fn f32_unsuffixed(f: f32) -> Literal {
-        let mut s = f.to_string();
-        if !s.contains('.') {
-            s.push_str(".0");
-        }
-        Literal::_new(s)
-    }
-
-    pub fn f64_unsuffixed(f: f64) -> Literal {
-        let mut s = f.to_string();
-        if !s.contains('.') {
-            s.push_str(".0");
-        }
-        Literal::_new(s)
-    }
-
-    pub fn string(t: &str) -> Literal {
-        let mut repr = String::with_capacity(t.len() + 2);
-        repr.push('"');
-        let mut chars = t.chars();
-        while let Some(ch) = chars.next() {
-            if ch == '\0' {
-                repr.push_str(
-                    if chars
-                        .as_str()
-                        .starts_with(|next| '0' <= next && next <= '7')
-                    {
-                        // circumvent clippy::octal_escapes lint
-                        "\\x00"
-                    } else {
-                        "\\0"
-                    },
-                );
-            } else if ch == '\'' {
-                // escape_debug turns this into "\'" which is unnecessary.
-                repr.push(ch);
-            } else {
-                repr.extend(ch.escape_debug());
-            }
-        }
-        repr.push('"');
-        Literal::_new(repr)
-    }
-
-    pub fn character(t: char) -> Literal {
-        let mut repr = String::new();
-        repr.push('\'');
-        if t == '"' {
-            // escape_debug turns this into '\"' which is unnecessary.
-            repr.push(t);
-        } else {
-            repr.extend(t.escape_debug());
-        }
-        repr.push('\'');
-        Literal::_new(repr)
-    }
-
-    pub fn byte_string(bytes: &[u8]) -> Literal {
-        let mut escaped = "b\"".to_string();
-        let mut bytes = bytes.iter();
-        while let Some(&b) = bytes.next() {
-            #[allow(clippy::match_overlapping_arm)]
-            match b {
-                b'\0' => escaped.push_str(match bytes.as_slice().first() {
-                    // circumvent clippy::octal_escapes lint
-                    Some(b'0'..=b'7') => r"\x00",
-                    _ => r"\0",
-                }),
-                b'\t' => escaped.push_str(r"\t"),
-                b'\n' => escaped.push_str(r"\n"),
-                b'\r' => escaped.push_str(r"\r"),
-                b'"' => escaped.push_str("\\\""),
-                b'\\' => escaped.push_str("\\\\"),
-                b'\x20'..=b'\x7E' => escaped.push(b as char),
-                _ => {
-                    let _ = write!(escaped, "\\x{:02X}", b);
-                }
-            }
-        }
-        escaped.push('"');
-        Literal::_new(escaped)
-    }
-
-    pub fn span(&self) -> Span {
-        self.span
-    }
-
-    pub fn set_span(&mut self, span: Span) {
-        self.span = span;
-    }
-
-    pub fn subspan<R: RangeBounds<usize>>(&self, range: R) -> Option<Span> {
-        #[cfg(not(span_locations))]
-        {
-            let _ = range;
-            None
-        }
-
-        #[cfg(span_locations)]
-        {
-            use core::ops::Bound;
-
-            let lo = match range.start_bound() {
-                Bound::Included(start) => {
-                    let start = u32::try_from(*start).ok()?;
-                    self.span.lo.checked_add(start)?
-                }
-                Bound::Excluded(start) => {
-                    let start = u32::try_from(*start).ok()?;
-                    self.span.lo.checked_add(start)?.checked_add(1)?
-                }
-                Bound::Unbounded => self.span.lo,
-            };
-            let hi = match range.end_bound() {
-                Bound::Included(end) => {
-                    let end = u32::try_from(*end).ok()?;
-                    self.span.lo.checked_add(end)?.checked_add(1)?
-                }
-                Bound::Excluded(end) => {
-                    let end = u32::try_from(*end).ok()?;
-                    self.span.lo.checked_add(end)?
-                }
-                Bound::Unbounded => self.span.hi,
-            };
-            if lo <= hi && hi <= self.span.hi {
-                Some(Span { lo, hi })
-            } else {
-                None
-            }
-        }
-    }
-}
-
-impl FromStr for Literal {
-    type Err = LexError;
-
-    fn from_str(repr: &str) -> Result<Self, Self::Err> {
-        let mut cursor = get_cursor(repr);
-        #[cfg(span_locations)]
-        let lo = cursor.off;
-
-        let negative = cursor.starts_with_char('-');
-        if negative {
-            cursor = cursor.advance(1);
-            if !cursor.starts_with_fn(|ch| ch.is_ascii_digit()) {
-                return Err(LexError::call_site());
-            }
-        }
-
-        if let Ok((rest, mut literal)) = parse::literal(cursor) {
-            if rest.is_empty() {
-                if negative {
-                    literal.repr.insert(0, '-');
-                }
-                literal.span = Span {
-                    #[cfg(span_locations)]
-                    lo,
-                    #[cfg(span_locations)]
-                    hi: rest.off,
-                };
-                return Ok(literal);
-            }
-        }
-        Err(LexError::call_site())
-    }
-}
-
-impl Display for Literal {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        Display::fmt(&self.repr, f)
-    }
-}
-
-impl Debug for Literal {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        let mut debug = fmt.debug_struct("Literal");
-        debug.field("lit", &format_args!("{}", self.repr));
-        debug_span_field_if_nontrivial(&mut debug, self.span);
-        debug.finish()
-    }
-}