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-rw-r--r--vendor/syn/src/buffer.rs215
-rw-r--r--vendor/syn/src/expr.rs21
-rw-r--r--vendor/syn/src/gen/clone.rs2
-rw-r--r--vendor/syn/src/gen/debug.rs10
-rw-r--r--vendor/syn/src/gen/eq.rs6
-rw-r--r--vendor/syn/src/gen/fold.rs6
-rw-r--r--vendor/syn/src/gen/hash.rs6
-rw-r--r--vendor/syn/src/gen/visit.rs6
-rw-r--r--vendor/syn/src/gen/visit_mut.rs6
-rw-r--r--vendor/syn/src/item.rs14
-rw-r--r--vendor/syn/src/lib.rs11
-rw-r--r--vendor/syn/src/lit.rs2
-rw-r--r--vendor/syn/src/parse_macro_input.rs4
-rw-r--r--vendor/syn/src/pat.rs35
-rw-r--r--vendor/syn/src/path.rs46
-rw-r--r--vendor/syn/src/stmt.rs6
-rw-r--r--vendor/syn/src/ty.rs53
17 files changed, 198 insertions, 251 deletions
diff --git a/vendor/syn/src/buffer.rs b/vendor/syn/src/buffer.rs
index 2c8e21bdb..161b614c8 100644
--- a/vendor/syn/src/buffer.rs
+++ b/vendor/syn/src/buffer.rs
@@ -14,23 +14,18 @@
use crate::proc_macro as pm;
use crate::Lifetime;
use proc_macro2::{Delimiter, Group, Ident, Literal, Punct, Spacing, Span, TokenStream, TokenTree};
-use std::hint;
use std::marker::PhantomData;
-use std::mem;
-use std::ptr;
-use std::slice;
/// Internal type which is used instead of `TokenTree` to represent a token tree
/// within a `TokenBuffer`.
enum Entry {
// Mimicking types from proc-macro.
- Group(Group, TokenBuffer),
+ // Group entries contain the offset to the matching End entry.
+ Group(Group, usize),
Ident(Ident),
Punct(Punct),
Literal(Literal),
- // End entries contain a raw pointer to the entry from the containing
- // token tree, or null if this is the outermost level.
- End(*const Entry),
+ End,
}
/// A buffer that can be efficiently traversed multiple times, unlike
@@ -39,102 +34,29 @@ enum Entry {
///
/// *This type is available only if Syn is built with the `"parsing"` feature.*
pub struct TokenBuffer {
- // NOTE: Do not implement clone on this - there are raw pointers inside
- // these entries which will be messed up. Moving the `TokenBuffer` itself is
- // safe as the data pointed to won't be moved.
- ptr: *const Entry,
- len: usize,
-}
-
-impl Drop for TokenBuffer {
- fn drop(&mut self) {
- unsafe {
- let slice = slice::from_raw_parts_mut(self.ptr as *mut Entry, self.len);
- let _ = Box::from_raw(slice);
- }
- }
+ // NOTE: Do not implement clone on this - while the current design could be
+ // cloned, other designs which could be desirable may not be cloneable.
+ entries: Box<[Entry]>,
}
impl TokenBuffer {
- // NOTE: Do not mutate the Vec returned from this function once it returns;
- // the address of its backing memory must remain stable.
- fn inner_new(stream: TokenStream, up: *const Entry) -> TokenBuffer {
- let iterator = stream.into_iter();
- let mut entries = Vec::with_capacity(iterator.size_hint().0 + 1);
- let mut next_index_after_last_group = 0;
- for tt in iterator {
+ fn recursive_new(entries: &mut Vec<Entry>, stream: TokenStream) {
+ for tt in stream {
match tt {
- TokenTree::Ident(ident) => {
- entries.push(Entry::Ident(ident));
- }
- TokenTree::Punct(punct) => {
- entries.push(Entry::Punct(punct));
- }
- TokenTree::Literal(literal) => {
- entries.push(Entry::Literal(literal));
- }
+ TokenTree::Ident(ident) => entries.push(Entry::Ident(ident)),
+ TokenTree::Punct(punct) => entries.push(Entry::Punct(punct)),
+ TokenTree::Literal(literal) => entries.push(Entry::Literal(literal)),
TokenTree::Group(group) => {
- // We cannot fill in a real `End` pointer until `entries` is
- // finished growing and getting potentially reallocated.
- // Instead, we temporarily coopt the spot where the end
- // pointer would go, and use it to string together an
- // intrusive linked list of all the Entry::Group entries in
- // the vector. Later after `entries` is done growing, we'll
- // traverse the linked list and fill in all the end
- // pointers with a correct value.
- let group_up =
- ptr::null::<u8>().wrapping_add(next_index_after_last_group) as *const Entry;
-
- let inner = Self::inner_new(group.stream(), group_up);
- entries.push(Entry::Group(group, inner));
- next_index_after_last_group = entries.len();
+ let group_start_index = entries.len();
+ entries.push(Entry::End); // we replace this below
+ Self::recursive_new(entries, group.stream());
+ let group_end_index = entries.len();
+ entries.push(Entry::End);
+ let group_end_offset = group_end_index - group_start_index;
+ entries[group_start_index] = Entry::Group(group, group_end_offset);
}
}
}
-
- // Add an `End` entry to the end with a reference to the enclosing token
- // stream which was passed in.
- entries.push(Entry::End(up));
-
- // NOTE: This is done to ensure that we don't accidentally modify the
- // length of the backing buffer. The backing buffer must remain at a
- // constant address after this point, as we are going to store a raw
- // pointer into it.
- let entries = entries.into_boxed_slice();
- let len = entries.len();
-
- // Convert boxed slice into a pointer to the first element early, to
- // avoid invalidating pointers into this slice when we move the Box.
- // See https://github.com/rust-lang/unsafe-code-guidelines/issues/326
- let entries = Box::into_raw(entries) as *mut Entry;
-
- // Traverse intrusive linked list of Entry::Group entries and fill in
- // correct End pointers.
- while let Some(idx) = next_index_after_last_group.checked_sub(1) {
- // We know that idx refers to one of the Entry::Group entries, and
- // that the very last entry is an Entry::End, so the next index
- // after any group entry is a valid index.
- let group_up = unsafe { entries.add(next_index_after_last_group) };
-
- // Linked list only takes us to entries which are of type Group.
- let token_buffer = match unsafe { &*entries.add(idx) } {
- Entry::Group(_group, token_buffer) => token_buffer,
- _ => unsafe { hint::unreachable_unchecked() },
- };
-
- // Last entry in any TokenBuffer is of type End.
- let buffer_ptr = token_buffer.ptr as *mut Entry;
- let last_entry = unsafe { &mut *buffer_ptr.add(token_buffer.len - 1) };
- let end_ptr_slot = match last_entry {
- Entry::End(end_ptr_slot) => end_ptr_slot,
- _ => unsafe { hint::unreachable_unchecked() },
- };
-
- // Step to next element in linked list.
- next_index_after_last_group = mem::replace(end_ptr_slot, group_up) as usize;
- }
-
- TokenBuffer { ptr: entries, len }
}
/// Creates a `TokenBuffer` containing all the tokens from the input
@@ -153,13 +75,19 @@ impl TokenBuffer {
/// Creates a `TokenBuffer` containing all the tokens from the input
/// `proc_macro2::TokenStream`.
pub fn new2(stream: TokenStream) -> Self {
- Self::inner_new(stream, ptr::null())
+ let mut entries = Vec::new();
+ Self::recursive_new(&mut entries, stream);
+ entries.push(Entry::End);
+ Self {
+ entries: entries.into_boxed_slice(),
+ }
}
/// Creates a cursor referencing the first token in the buffer and able to
/// traverse until the end of the buffer.
pub fn begin(&self) -> Cursor {
- unsafe { Cursor::create(self.ptr, self.ptr.add(self.len - 1)) }
+ let ptr = self.entries.as_ptr();
+ unsafe { Cursor::create(ptr, ptr.add(self.entries.len() - 1)) }
}
}
@@ -179,7 +107,7 @@ impl TokenBuffer {
pub struct Cursor<'a> {
// The current entry which the `Cursor` is pointing at.
ptr: *const Entry,
- // This is the only `Entry::End(..)` object which this cursor is allowed to
+ // This is the only `Entry::End` object which this cursor is allowed to
// point at. All other `End` objects are skipped over in `Cursor::create`.
scope: *const Entry,
// Cursor is covariant in 'a. This field ensures that our pointers are still
@@ -199,7 +127,7 @@ impl<'a> Cursor<'a> {
// object in global storage.
struct UnsafeSyncEntry(Entry);
unsafe impl Sync for UnsafeSyncEntry {}
- static EMPTY_ENTRY: UnsafeSyncEntry = UnsafeSyncEntry(Entry::End(0 as *const Entry));
+ static EMPTY_ENTRY: UnsafeSyncEntry = UnsafeSyncEntry(Entry::End);
Cursor {
ptr: &EMPTY_ENTRY.0,
@@ -212,15 +140,15 @@ impl<'a> Cursor<'a> {
/// `None`-delimited scopes when the cursor reaches the end of them,
/// allowing for them to be treated transparently.
unsafe fn create(mut ptr: *const Entry, scope: *const Entry) -> Self {
- // NOTE: If we're looking at a `End(..)`, we want to advance the cursor
+ // NOTE: If we're looking at a `End`, we want to advance the cursor
// past it, unless `ptr == scope`, which means that we're at the edge of
// our cursor's scope. We should only have `ptr != scope` at the exit
// from None-delimited groups entered with `ignore_none`.
- while let Entry::End(exit) = *ptr {
+ while let Entry::End = *ptr {
if ptr == scope {
break;
}
- ptr = exit;
+ ptr = ptr.add(1);
}
Cursor {
@@ -238,7 +166,10 @@ impl<'a> Cursor<'a> {
/// Bump the cursor to point at the next token after the current one. This
/// is undefined behavior if the cursor is currently looking at an
/// `Entry::End`.
- unsafe fn bump(self) -> Cursor<'a> {
+ ///
+ /// If the cursor is looking at an `Entry::Group`, the bumped cursor will
+ /// point at the first token in the group (with the same scope end).
+ unsafe fn bump_ignore_group(self) -> Cursor<'a> {
Cursor::create(self.ptr.offset(1), self.scope)
}
@@ -248,14 +179,9 @@ impl<'a> Cursor<'a> {
///
/// WARNING: This mutates its argument.
fn ignore_none(&mut self) {
- while let Entry::Group(group, buf) = self.entry() {
+ while let Entry::Group(group, _) = self.entry() {
if group.delimiter() == Delimiter::None {
- // NOTE: We call `Cursor::create` here to make sure that
- // situations where we should immediately exit the span after
- // entering it are handled correctly.
- unsafe {
- *self = Cursor::create(buf.ptr, self.scope);
- }
+ unsafe { *self = self.bump_ignore_group() };
} else {
break;
}
@@ -279,9 +205,12 @@ impl<'a> Cursor<'a> {
self.ignore_none();
}
- if let Entry::Group(group, buf) = self.entry() {
+ if let Entry::Group(group, end_offset) = self.entry() {
if group.delimiter() == delim {
- return Some((buf.begin(), group.span(), unsafe { self.bump() }));
+ let end_of_group = unsafe { self.ptr.add(*end_offset) };
+ let inside_of_group = unsafe { Cursor::create(self.ptr.add(1), end_of_group) };
+ let after_group = unsafe { Cursor::create(end_of_group, self.scope) };
+ return Some((inside_of_group, group.span(), after_group));
}
}
@@ -293,7 +222,7 @@ impl<'a> Cursor<'a> {
pub fn ident(mut self) -> Option<(Ident, Cursor<'a>)> {
self.ignore_none();
match self.entry() {
- Entry::Ident(ident) => Some((ident.clone(), unsafe { self.bump() })),
+ Entry::Ident(ident) => Some((ident.clone(), unsafe { self.bump_ignore_group() })),
_ => None,
}
}
@@ -304,7 +233,7 @@ impl<'a> Cursor<'a> {
self.ignore_none();
match self.entry() {
Entry::Punct(punct) if punct.as_char() != '\'' => {
- Some((punct.clone(), unsafe { self.bump() }))
+ Some((punct.clone(), unsafe { self.bump_ignore_group() }))
}
_ => None,
}
@@ -315,7 +244,7 @@ impl<'a> Cursor<'a> {
pub fn literal(mut self) -> Option<(Literal, Cursor<'a>)> {
self.ignore_none();
match self.entry() {
- Entry::Literal(literal) => Some((literal.clone(), unsafe { self.bump() })),
+ Entry::Literal(literal) => Some((literal.clone(), unsafe { self.bump_ignore_group() })),
_ => None,
}
}
@@ -326,17 +255,13 @@ impl<'a> Cursor<'a> {
self.ignore_none();
match self.entry() {
Entry::Punct(punct) if punct.as_char() == '\'' && punct.spacing() == Spacing::Joint => {
- let next = unsafe { self.bump() };
- match next.ident() {
- Some((ident, rest)) => {
- let lifetime = Lifetime {
- apostrophe: punct.span(),
- ident,
- };
- Some((lifetime, rest))
- }
- None => None,
- }
+ let next = unsafe { self.bump_ignore_group() };
+ let (ident, rest) = next.ident()?;
+ let lifetime = Lifetime {
+ apostrophe: punct.span(),
+ ident,
+ };
+ Some((lifetime, rest))
}
_ => None,
}
@@ -362,15 +287,16 @@ impl<'a> Cursor<'a> {
/// This method does not treat `None`-delimited groups as transparent, and
/// will return a `Group(None, ..)` if the cursor is looking at one.
pub fn token_tree(self) -> Option<(TokenTree, Cursor<'a>)> {
- let tree = match self.entry() {
- Entry::Group(group, _) => group.clone().into(),
- Entry::Literal(literal) => literal.clone().into(),
- Entry::Ident(ident) => ident.clone().into(),
- Entry::Punct(punct) => punct.clone().into(),
- Entry::End(..) => return None,
+ let (tree, len) = match self.entry() {
+ Entry::Group(group, end_offset) => (group.clone().into(), *end_offset),
+ Entry::Literal(literal) => (literal.clone().into(), 1),
+ Entry::Ident(ident) => (ident.clone().into(), 1),
+ Entry::Punct(punct) => (punct.clone().into(), 1),
+ Entry::End => return None,
};
- Some((tree, unsafe { self.bump() }))
+ let rest = unsafe { Cursor::create(self.ptr.add(len), self.scope) };
+ Some((tree, rest))
}
/// Returns the `Span` of the current token, or `Span::call_site()` if this
@@ -381,7 +307,7 @@ impl<'a> Cursor<'a> {
Entry::Literal(literal) => literal.span(),
Entry::Ident(ident) => ident.span(),
Entry::Punct(punct) => punct.span(),
- Entry::End(..) => Span::call_site(),
+ Entry::End => Span::call_site(),
}
}
@@ -390,19 +316,22 @@ impl<'a> Cursor<'a> {
///
/// This method treats `'lifetimes` as a single token.
pub(crate) fn skip(self) -> Option<Cursor<'a>> {
- match self.entry() {
- Entry::End(..) => None,
+ let len = match self.entry() {
+ Entry::End => return None,
// Treat lifetimes as a single tt for the purposes of 'skip'.
Entry::Punct(punct) if punct.as_char() == '\'' && punct.spacing() == Spacing::Joint => {
- let next = unsafe { self.bump() };
- match next.entry() {
- Entry::Ident(_) => Some(unsafe { next.bump() }),
- _ => Some(next),
+ match unsafe { &*self.ptr.add(1) } {
+ Entry::Ident(_) => 2,
+ _ => 1,
}
}
- _ => Some(unsafe { self.bump() }),
- }
+
+ Entry::Group(_, end_offset) => *end_offset,
+ _ => 1,
+ };
+
+ Some(unsafe { Cursor::create(self.ptr.add(len), self.scope) })
}
}
diff --git a/vendor/syn/src/expr.rs b/vendor/syn/src/expr.rs
index cf0fa0af9..93a59b0e2 100644
--- a/vendor/syn/src/expr.rs
+++ b/vendor/syn/src/expr.rs
@@ -1371,7 +1371,9 @@ pub(crate) mod parsing {
});
} else if Precedence::Cast >= base && input.peek(Token![as]) {
let as_token: Token![as] = input.parse()?;
- let ty = input.call(Type::without_plus)?;
+ let allow_plus = false;
+ let allow_group_generic = false;
+ let ty = ty::parsing::ambig_ty(input, allow_plus, allow_group_generic)?;
check_cast(input)?;
lhs = Expr::Cast(ExprCast {
attrs: Vec::new(),
@@ -1381,7 +1383,9 @@ pub(crate) mod parsing {
});
} else if Precedence::Cast >= base && input.peek(Token![:]) && !input.peek(Token![::]) {
let colon_token: Token![:] = input.parse()?;
- let ty = input.call(Type::without_plus)?;
+ let allow_plus = false;
+ let allow_group_generic = false;
+ let ty = ty::parsing::ambig_ty(input, allow_plus, allow_group_generic)?;
check_cast(input)?;
lhs = Expr::Type(ExprType {
attrs: Vec::new(),
@@ -1429,7 +1433,9 @@ pub(crate) mod parsing {
});
} else if Precedence::Cast >= base && input.peek(Token![as]) {
let as_token: Token![as] = input.parse()?;
- let ty = input.call(Type::without_plus)?;
+ let allow_plus = false;
+ let allow_group_generic = false;
+ let ty = ty::parsing::ambig_ty(input, allow_plus, allow_group_generic)?;
check_cast(input)?;
lhs = Expr::Cast(ExprCast {
attrs: Vec::new(),
@@ -1727,7 +1733,10 @@ pub(crate) mod parsing {
|| input.peek(Token![move])
{
expr_closure(input, allow_struct).map(Expr::Closure)
- } else if input.peek(Token![for]) && input.peek2(Token![<]) && input.peek3(Lifetime) {
+ } else if input.peek(Token![for])
+ && input.peek2(Token![<])
+ && (input.peek3(Lifetime) || input.peek3(Token![>]))
+ {
let begin = input.fork();
input.parse::<BoundLifetimes>()?;
expr_closure(input, allow_struct)?;
@@ -2010,7 +2019,9 @@ pub(crate) mod parsing {
Expr::If(input.parse()?)
} else if input.peek(Token![while]) {
Expr::While(input.parse()?)
- } else if input.peek(Token![for]) {
+ } else if input.peek(Token![for])
+ && !(input.peek2(Token![<]) && (input.peek3(Lifetime) || input.peek3(Token![>])))
+ {
Expr::ForLoop(input.parse()?)
} else if input.peek(Token![loop]) {
Expr::Loop(input.parse()?)
diff --git a/vendor/syn/src/gen/clone.rs b/vendor/syn/src/gen/clone.rs
index 8de1cd8c9..a413e3ec7 100644
--- a/vendor/syn/src/gen/clone.rs
+++ b/vendor/syn/src/gen/clone.rs
@@ -910,9 +910,9 @@ impl Clone for GenericArgument {
match self {
GenericArgument::Lifetime(v0) => GenericArgument::Lifetime(v0.clone()),
GenericArgument::Type(v0) => GenericArgument::Type(v0.clone()),
+ GenericArgument::Const(v0) => GenericArgument::Const(v0.clone()),
GenericArgument::Binding(v0) => GenericArgument::Binding(v0.clone()),
GenericArgument::Constraint(v0) => GenericArgument::Constraint(v0.clone()),
- GenericArgument::Const(v0) => GenericArgument::Const(v0.clone()),
}
}
}
diff --git a/vendor/syn/src/gen/debug.rs b/vendor/syn/src/gen/debug.rs
index 4adf8c593..a1f0afa79 100644
--- a/vendor/syn/src/gen/debug.rs
+++ b/vendor/syn/src/gen/debug.rs
@@ -1268,6 +1268,11 @@ impl Debug for GenericArgument {
formatter.field(v0);
formatter.finish()
}
+ GenericArgument::Const(v0) => {
+ let mut formatter = formatter.debug_tuple("Const");
+ formatter.field(v0);
+ formatter.finish()
+ }
GenericArgument::Binding(v0) => {
let mut formatter = formatter.debug_tuple("Binding");
formatter.field(v0);
@@ -1278,11 +1283,6 @@ impl Debug for GenericArgument {
formatter.field(v0);
formatter.finish()
}
- GenericArgument::Const(v0) => {
- let mut formatter = formatter.debug_tuple("Const");
- formatter.field(v0);
- formatter.finish()
- }
}
}
}
diff --git a/vendor/syn/src/gen/eq.rs b/vendor/syn/src/gen/eq.rs
index 40fed0b89..20acb809d 100644
--- a/vendor/syn/src/gen/eq.rs
+++ b/vendor/syn/src/gen/eq.rs
@@ -878,13 +878,13 @@ impl PartialEq for GenericArgument {
(GenericArgument::Type(self0), GenericArgument::Type(other0)) => {
self0 == other0
}
- (GenericArgument::Binding(self0), GenericArgument::Binding(other0)) => {
+ (GenericArgument::Const(self0), GenericArgument::Const(other0)) => {
self0 == other0
}
- (GenericArgument::Constraint(self0), GenericArgument::Constraint(other0)) => {
+ (GenericArgument::Binding(self0), GenericArgument::Binding(other0)) => {
self0 == other0
}
- (GenericArgument::Const(self0), GenericArgument::Const(other0)) => {
+ (GenericArgument::Constraint(self0), GenericArgument::Constraint(other0)) => {
self0 == other0
}
_ => false,
diff --git a/vendor/syn/src/gen/fold.rs b/vendor/syn/src/gen/fold.rs
index 6e19e6f3a..98bb5794a 100644
--- a/vendor/syn/src/gen/fold.rs
+++ b/vendor/syn/src/gen/fold.rs
@@ -1787,15 +1787,15 @@ where
GenericArgument::Type(_binding_0) => {
GenericArgument::Type(f.fold_type(_binding_0))
}
+ GenericArgument::Const(_binding_0) => {
+ GenericArgument::Const(f.fold_expr(_binding_0))
+ }
GenericArgument::Binding(_binding_0) => {
GenericArgument::Binding(f.fold_binding(_binding_0))
}
GenericArgument::Constraint(_binding_0) => {
GenericArgument::Constraint(f.fold_constraint(_binding_0))
}
- GenericArgument::Const(_binding_0) => {
- GenericArgument::Const(f.fold_expr(_binding_0))
- }
}
}
#[cfg(feature = "full")]
diff --git a/vendor/syn/src/gen/hash.rs b/vendor/syn/src/gen/hash.rs
index f68a7630e..d0400e19d 100644
--- a/vendor/syn/src/gen/hash.rs
+++ b/vendor/syn/src/gen/hash.rs
@@ -1184,15 +1184,15 @@ impl Hash for GenericArgument {
state.write_u8(1u8);
v0.hash(state);
}
- GenericArgument::Binding(v0) => {
+ GenericArgument::Const(v0) => {
state.write_u8(2u8);
v0.hash(state);
}
- GenericArgument::Constraint(v0) => {
+ GenericArgument::Binding(v0) => {
state.write_u8(3u8);
v0.hash(state);
}
- GenericArgument::Const(v0) => {
+ GenericArgument::Constraint(v0) => {
state.write_u8(4u8);
v0.hash(state);
}
diff --git a/vendor/syn/src/gen/visit.rs b/vendor/syn/src/gen/visit.rs
index 051b65936..19ddd2e72 100644
--- a/vendor/syn/src/gen/visit.rs
+++ b/vendor/syn/src/gen/visit.rs
@@ -1974,15 +1974,15 @@ where
GenericArgument::Type(_binding_0) => {
v.visit_type(_binding_0);
}
+ GenericArgument::Const(_binding_0) => {
+ v.visit_expr(_binding_0);
+ }
GenericArgument::Binding(_binding_0) => {
v.visit_binding(_binding_0);
}
GenericArgument::Constraint(_binding_0) => {
v.visit_constraint(_binding_0);
}
- GenericArgument::Const(_binding_0) => {
- v.visit_expr(_binding_0);
- }
}
}
#[cfg(feature = "full")]
diff --git a/vendor/syn/src/gen/visit_mut.rs b/vendor/syn/src/gen/visit_mut.rs
index 3ddbe9c06..239709d19 100644
--- a/vendor/syn/src/gen/visit_mut.rs
+++ b/vendor/syn/src/gen/visit_mut.rs
@@ -1975,15 +1975,15 @@ where
GenericArgument::Type(_binding_0) => {
v.visit_type_mut(_binding_0);
}
+ GenericArgument::Const(_binding_0) => {
+ v.visit_expr_mut(_binding_0);
+ }
GenericArgument::Binding(_binding_0) => {
v.visit_binding_mut(_binding_0);
}
GenericArgument::Constraint(_binding_0) => {
v.visit_constraint_mut(_binding_0);
}
- GenericArgument::Const(_binding_0) => {
- v.visit_expr_mut(_binding_0);
- }
}
}
#[cfg(feature = "full")]
diff --git a/vendor/syn/src/item.rs b/vendor/syn/src/item.rs
index 1ce970ee2..a1ef7ab43 100644
--- a/vendor/syn/src/item.rs
+++ b/vendor/syn/src/item.rs
@@ -2765,7 +2765,6 @@ mod printing {
use super::*;
use crate::attr::FilterAttrs;
use crate::print::TokensOrDefault;
- use crate::punctuated::Pair;
use proc_macro2::TokenStream;
use quote::{ToTokens, TokenStreamExt};
@@ -3283,16 +3282,9 @@ mod printing {
self.generics.to_tokens(tokens);
self.paren_token.surround(tokens, |tokens| {
let mut last_is_variadic = false;
- for input in self.inputs.pairs() {
- match input {
- Pair::Punctuated(input, comma) => {
- maybe_variadic_to_tokens(input, tokens);
- comma.to_tokens(tokens);
- }
- Pair::End(input) => {
- last_is_variadic = maybe_variadic_to_tokens(input, tokens);
- }
- }
+ for pair in self.inputs.pairs() {
+ last_is_variadic = maybe_variadic_to_tokens(pair.value(), tokens);
+ pair.punct().to_tokens(tokens);
}
if self.variadic.is_some() && !last_is_variadic {
if !self.inputs.empty_or_trailing() {
diff --git a/vendor/syn/src/lib.rs b/vendor/syn/src/lib.rs
index 09addd3a6..81f03e1b5 100644
--- a/vendor/syn/src/lib.rs
+++ b/vendor/syn/src/lib.rs
@@ -250,10 +250,11 @@
//! dynamic library libproc_macro from rustc toolchain.
// Syn types in rustdoc of other crates get linked to here.
-#![doc(html_root_url = "https://docs.rs/syn/1.0.99")]
+#![doc(html_root_url = "https://docs.rs/syn/1.0.102")]
#![cfg_attr(doc_cfg, feature(doc_cfg))]
#![allow(non_camel_case_types)]
#![allow(
+ clippy::bool_to_int_with_if,
clippy::cast_lossless,
clippy::cast_possible_truncation,
clippy::cast_ptr_alignment,
@@ -812,14 +813,6 @@ mod print;
////////////////////////////////////////////////////////////////////////////////
-// https://github.com/rust-lang/rust/issues/62830
-#[cfg(feature = "parsing")]
-mod rustdoc_workaround {
- pub use crate::parse::{self as parse_module};
-}
-
-////////////////////////////////////////////////////////////////////////////////
-
mod error;
pub use crate::error::{Error, Result};
diff --git a/vendor/syn/src/lit.rs b/vendor/syn/src/lit.rs
index 2600dc801..130b40ed1 100644
--- a/vendor/syn/src/lit.rs
+++ b/vendor/syn/src/lit.rs
@@ -224,7 +224,7 @@ impl LitStr {
// Parse string literal into a token stream with every span equal to the
// original literal's span.
- let mut tokens = crate::parse_str(&self.value())?;
+ let mut tokens = TokenStream::from_str(&self.value())?;
tokens = respan_token_stream(tokens, self.span());
parser.parse2(tokens)
diff --git a/vendor/syn/src/parse_macro_input.rs b/vendor/syn/src/parse_macro_input.rs
index 8e1a5ec6b..6163cd70a 100644
--- a/vendor/syn/src/parse_macro_input.rs
+++ b/vendor/syn/src/parse_macro_input.rs
@@ -4,7 +4,7 @@
/// Refer to the [`parse` module] documentation for more details about parsing
/// in Syn.
///
-/// [`parse` module]: crate::rustdoc_workaround::parse_module
+/// [`parse` module]: mod@crate::parse
///
/// <br>
///
@@ -51,7 +51,7 @@
/// This macro can also be used with the [`Parser` trait] for types that have
/// multiple ways that they can be parsed.
///
-/// [`Parser` trait]: crate::rustdoc_workaround::parse_module::Parser
+/// [`Parser` trait]: crate::parse::Parser
///
/// ```
/// # extern crate proc_macro;
diff --git a/vendor/syn/src/pat.rs b/vendor/syn/src/pat.rs
index fa0818c16..b279186aa 100644
--- a/vendor/syn/src/pat.rs
+++ b/vendor/syn/src/pat.rs
@@ -400,11 +400,11 @@ pub mod parsing {
}
if input.peek(token::Brace) {
- let pat = pat_struct(input, path)?;
+ let pat = pat_struct(begin.fork(), input, path)?;
if qself.is_some() {
Ok(Pat::Verbatim(verbatim::between(begin, input)))
} else {
- Ok(Pat::Struct(pat))
+ Ok(pat)
}
} else if input.peek(token::Paren) {
let pat = pat_tuple_struct(input, path)?;
@@ -465,13 +465,23 @@ pub mod parsing {
})
}
- fn pat_struct(input: ParseStream, path: Path) -> Result<PatStruct> {
+ fn pat_struct(begin: ParseBuffer, input: ParseStream, path: Path) -> Result<Pat> {
let content;
let brace_token = braced!(content in input);
let mut fields = Punctuated::new();
- while !content.is_empty() && !content.peek(Token![..]) {
- let value = content.call(field_pat)?;
+ let mut dot2_token = None;
+ while !content.is_empty() {
+ let attrs = content.call(Attribute::parse_outer)?;
+ if content.peek(Token![..]) {
+ dot2_token = Some(content.parse()?);
+ if !attrs.is_empty() {
+ return Ok(Pat::Verbatim(verbatim::between(begin, input)));
+ }
+ break;
+ }
+ let mut value = content.call(field_pat)?;
+ value.attrs = attrs;
fields.push_value(value);
if content.is_empty() {
break;
@@ -480,19 +490,13 @@ pub mod parsing {
fields.push_punct(punct);
}
- let dot2_token = if fields.empty_or_trailing() && content.peek(Token![..]) {
- Some(content.parse()?)
- } else {
- None
- };
-
- Ok(PatStruct {
+ Ok(Pat::Struct(PatStruct {
attrs: Vec::new(),
path,
brace_token,
fields,
dot2_token,
- })
+ }))
}
impl Member {
@@ -505,7 +509,6 @@ pub mod parsing {
}
fn field_pat(input: ParseStream) -> Result<FieldPat> {
- let attrs = input.call(Attribute::parse_outer)?;
let boxed: Option<Token![box]> = input.parse()?;
let by_ref: Option<Token![ref]> = input.parse()?;
let mutability: Option<Token![mut]> = input.parse()?;
@@ -515,7 +518,7 @@ pub mod parsing {
|| member.is_unnamed()
{
return Ok(FieldPat {
- attrs,
+ attrs: Vec::new(),
member,
colon_token: input.parse()?,
pat: Box::new(multi_pat_with_leading_vert(input)?),
@@ -544,7 +547,7 @@ pub mod parsing {
}
Ok(FieldPat {
- attrs,
+ attrs: Vec::new(),
member: Member::Named(ident),
colon_token: None,
pat: Box::new(pat),
diff --git a/vendor/syn/src/path.rs b/vendor/syn/src/path.rs
index 00be352b1..742273afd 100644
--- a/vendor/syn/src/path.rs
+++ b/vendor/syn/src/path.rs
@@ -109,16 +109,16 @@ ast_enum! {
Lifetime(Lifetime),
/// A type argument.
Type(Type),
- /// A binding (equality constraint) on an associated type: the `Item =
- /// u8` in `Iterator<Item = u8>`.
- Binding(Binding),
- /// An associated type bound: `Iterator<Item: Display>`.
- Constraint(Constraint),
/// A const expression. Must be inside of a block.
///
/// NOTE: Identity expressions are represented as Type arguments, as
/// they are indistinguishable syntactically.
Const(Expr),
+ /// A binding (equality constraint) on an associated type: the `Item =
+ /// u8` in `Iterator<Item = u8>`.
+ Binding(Binding),
+ /// An associated type bound: `Iterator<Item: Display>`.
+ Constraint(Constraint),
}
}
@@ -729,8 +729,6 @@ pub(crate) mod printing {
match self {
GenericArgument::Lifetime(lt) => lt.to_tokens(tokens),
GenericArgument::Type(ty) => ty.to_tokens(tokens),
- GenericArgument::Binding(tb) => tb.to_tokens(tokens),
- GenericArgument::Constraint(tc) => tc.to_tokens(tokens),
GenericArgument::Const(e) => match *e {
Expr::Lit(_) => e.to_tokens(tokens),
@@ -746,6 +744,8 @@ pub(crate) mod printing {
e.to_tokens(tokens);
}),
},
+ GenericArgument::Binding(tb) => tb.to_tokens(tokens),
+ GenericArgument::Constraint(tc) => tc.to_tokens(tokens),
}
}
}
@@ -756,11 +756,8 @@ pub(crate) mod printing {
self.colon2_token.to_tokens(tokens);
self.lt_token.to_tokens(tokens);
- // Print lifetimes before types and consts, all before bindings,
- // regardless of their order in self.args.
- //
- // TODO: ordering rules for const arguments vs type arguments have
- // not been settled yet. https://github.com/rust-lang/rust/issues/44580
+ // Print lifetimes before types/consts/bindings, regardless of their
+ // order in self.args.
let mut trailing_or_empty = true;
for param in self.args.pairs() {
match **param.value() {
@@ -769,37 +766,24 @@ pub(crate) mod printing {
trailing_or_empty = param.punct().is_some();
}
GenericArgument::Type(_)
- | GenericArgument::Binding(_)
- | GenericArgument::Constraint(_)
- | GenericArgument::Const(_) => {}
- }
- }
- for param in self.args.pairs() {
- match **param.value() {
- GenericArgument::Type(_) | GenericArgument::Const(_) => {
- if !trailing_or_empty {
- <Token![,]>::default().to_tokens(tokens);
- }
- param.to_tokens(tokens);
- trailing_or_empty = param.punct().is_some();
- }
- GenericArgument::Lifetime(_)
+ | GenericArgument::Const(_)
| GenericArgument::Binding(_)
| GenericArgument::Constraint(_) => {}
}
}
for param in self.args.pairs() {
match **param.value() {
- GenericArgument::Binding(_) | GenericArgument::Constraint(_) => {
+ GenericArgument::Type(_)
+ | GenericArgument::Const(_)
+ | GenericArgument::Binding(_)
+ | GenericArgument::Constraint(_) => {
if !trailing_or_empty {
<Token![,]>::default().to_tokens(tokens);
}
param.to_tokens(tokens);
trailing_or_empty = param.punct().is_some();
}
- GenericArgument::Lifetime(_)
- | GenericArgument::Type(_)
- | GenericArgument::Const(_) => {}
+ GenericArgument::Lifetime(_) => {}
}
}
diff --git a/vendor/syn/src/stmt.rs b/vendor/syn/src/stmt.rs
index 3e2c71bdd..58bd013ec 100644
--- a/vendor/syn/src/stmt.rs
+++ b/vendor/syn/src/stmt.rs
@@ -175,7 +175,11 @@ pub mod parsing {
|| input.peek(Token![crate]) && !input.peek2(Token![::])
|| input.peek(Token![extern])
|| input.peek(Token![use])
- || input.peek(Token![static]) && (input.peek2(Token![mut]) || input.peek2(Ident))
+ || input.peek(Token![static])
+ && (input.peek2(Token![mut])
+ || input.peek2(Ident)
+ && !(input.peek2(Token![async])
+ && (input.peek3(Token![move]) || input.peek3(Token![|]))))
|| input.peek(Token![const]) && !input.peek2(token::Brace)
|| input.peek(Token![unsafe]) && !input.peek2(token::Brace)
|| input.peek(Token![async])
diff --git a/vendor/syn/src/ty.rs b/vendor/syn/src/ty.rs
index 0f1341fdd..4068be3c7 100644
--- a/vendor/syn/src/ty.rs
+++ b/vendor/syn/src/ty.rs
@@ -343,7 +343,8 @@ pub mod parsing {
impl Parse for Type {
fn parse(input: ParseStream) -> Result<Self> {
let allow_plus = true;
- ambig_ty(input, allow_plus)
+ let allow_group_generic = true;
+ ambig_ty(input, allow_plus, allow_group_generic)
}
}
@@ -356,11 +357,16 @@ pub mod parsing {
#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
pub fn without_plus(input: ParseStream) -> Result<Self> {
let allow_plus = false;
- ambig_ty(input, allow_plus)
+ let allow_group_generic = true;
+ ambig_ty(input, allow_plus, allow_group_generic)
}
}
- fn ambig_ty(input: ParseStream, allow_plus: bool) -> Result<Type> {
+ pub(crate) fn ambig_ty(
+ input: ParseStream,
+ allow_plus: bool,
+ allow_group_generic: bool,
+ ) -> Result<Type> {
let begin = input.fork();
if input.peek(token::Group) {
@@ -381,7 +387,9 @@ pub mod parsing {
path: Path::parse_helper(input, false)?,
}));
}
- } else if input.peek(Token![<]) || input.peek(Token![::]) && input.peek3(Token![<]) {
+ } else if input.peek(Token![<]) && allow_group_generic
+ || input.peek(Token![::]) && input.peek3(Token![<])
+ {
if let Type::Path(mut ty) = *group.elem {
let arguments = &mut ty.path.segments.last_mut().unwrap().arguments;
if let PathArguments::None = arguments {
@@ -537,9 +545,15 @@ pub mod parsing {
|| lookahead.peek(Token![::])
|| lookahead.peek(Token![<])
{
- if input.peek(Token![dyn]) {
- let trait_object = TypeTraitObject::parse(input, allow_plus)?;
- return Ok(Type::TraitObject(trait_object));
+ let dyn_token: Option<Token![dyn]> = input.parse()?;
+ if dyn_token.is_some() {
+ let star_token: Option<Token![*]> = input.parse()?;
+ let bounds = TypeTraitObject::parse_bounds(input, allow_plus)?;
+ return Ok(if star_token.is_some() {
+ Type::Verbatim(verbatim::between(begin, input))
+ } else {
+ Type::TraitObject(TypeTraitObject { dyn_token, bounds })
+ });
}
let ty: TypePath = input.parse()?;
@@ -819,15 +833,28 @@ pub mod parsing {
#[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
impl Parse for TypePath {
fn parse(input: ParseStream) -> Result<Self> {
- let (qself, mut path) = path::parsing::qpath(input, false)?;
+ let expr_style = false;
+ let (qself, mut path) = path::parsing::qpath(input, expr_style)?;
- if path.segments.last().unwrap().arguments.is_empty()
+ while path.segments.last().unwrap().arguments.is_empty()
&& (input.peek(token::Paren) || input.peek(Token![::]) && input.peek3(token::Paren))
{
input.parse::<Option<Token![::]>>()?;
let args: ParenthesizedGenericArguments = input.parse()?;
+ let allow_associated_type = cfg!(feature = "full")
+ && match &args.output {
+ ReturnType::Default => true,
+ ReturnType::Type(_, ty) => match **ty {
+ // TODO: probably some of the other kinds allow this too.
+ Type::Paren(_) => true,
+ _ => false,
+ },
+ };
let parenthesized = PathArguments::Parenthesized(args);
path.segments.last_mut().unwrap().arguments = parenthesized;
+ if allow_associated_type {
+ Path::parse_rest(input, &mut path, expr_style)?;
+ }
}
Ok(TypePath { qself, path })
@@ -844,7 +871,8 @@ pub mod parsing {
pub(crate) fn parse(input: ParseStream, allow_plus: bool) -> Result<Self> {
if input.peek(Token![->]) {
let arrow = input.parse()?;
- let ty = ambig_ty(input, allow_plus)?;
+ let allow_group_generic = true;
+ let ty = ambig_ty(input, allow_plus, allow_group_generic)?;
Ok(ReturnType::Type(arrow, Box::new(ty)))
} else {
Ok(ReturnType::Default)
@@ -967,7 +995,10 @@ pub mod parsing {
let content;
Ok(TypeParen {
paren_token: parenthesized!(content in input),
- elem: Box::new(ambig_ty(&content, allow_plus)?),
+ elem: Box::new({
+ let allow_group_generic = true;
+ ambig_ty(&content, allow_plus, allow_group_generic)?
+ }),
})
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-04 08:32:15 +0000