更新libclamav库1.0.0版本

clamav/libclamav_rust/.cargo/vendor/syn/src/data.rs

@@ -0,0 +1,493 @@
+use super::*;
+use crate::punctuated::Punctuated;
+
+ast_struct! {
+    /// An enum variant.
+    ///
+    /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+    /// feature.*
+    #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+    pub struct Variant {
+        /// Attributes tagged on the variant.
+        pub attrs: Vec<Attribute>,
+
+        /// Name of the variant.
+        pub ident: Ident,
+
+        /// Content stored in the variant.
+        pub fields: Fields,
+
+        /// Explicit discriminant: `Variant = 1`
+        pub discriminant: Option<(Token![=], Expr)>,
+    }
+}
+
+ast_enum_of_structs! {
+    /// Data stored within an enum variant or struct.
+    ///
+    /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+    /// feature.*
+    ///
+    /// # Syntax tree enum
+    ///
+    /// This type is a [syntax tree enum].
+    ///
+    /// [syntax tree enum]: Expr#syntax-tree-enums
+    #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+    pub enum Fields {
+        /// Named fields of a struct or struct variant such as `Point { x: f64,
+        /// y: f64 }`.
+        Named(FieldsNamed),
+
+        /// Unnamed fields of a tuple struct or tuple variant such as `Some(T)`.
+        Unnamed(FieldsUnnamed),
+
+        /// Unit struct or unit variant such as `None`.
+        Unit,
+    }
+}
+
+ast_struct! {
+    /// Named fields of a struct or struct variant such as `Point { x: f64,
+    /// y: f64 }`.
+    ///
+    /// *This type is available only if Syn is built with the `"derive"` or
+    /// `"full"` feature.*
+    #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+    pub struct FieldsNamed {
+        pub brace_token: token::Brace,
+        pub named: Punctuated<Field, Token![,]>,
+    }
+}
+
+ast_struct! {
+    /// Unnamed fields of a tuple struct or tuple variant such as `Some(T)`.
+    ///
+    /// *This type is available only if Syn is built with the `"derive"` or
+    /// `"full"` feature.*
+    #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+    pub struct FieldsUnnamed {
+        pub paren_token: token::Paren,
+        pub unnamed: Punctuated<Field, Token![,]>,
+    }
+}
+
+impl Fields {
+    /// Get an iterator over the borrowed [`Field`] items in this object. This
+    /// iterator can be used to iterate over a named or unnamed struct or
+    /// variant's fields uniformly.
+    pub fn iter(&self) -> punctuated::Iter<Field> {
+        match self {
+            Fields::Unit => crate::punctuated::empty_punctuated_iter(),
+            Fields::Named(f) => f.named.iter(),
+            Fields::Unnamed(f) => f.unnamed.iter(),
+        }
+    }
+
+    /// Get an iterator over the mutably borrowed [`Field`] items in this
+    /// object. This iterator can be used to iterate over a named or unnamed
+    /// struct or variant's fields uniformly.
+    pub fn iter_mut(&mut self) -> punctuated::IterMut<Field> {
+        match self {
+            Fields::Unit => crate::punctuated::empty_punctuated_iter_mut(),
+            Fields::Named(f) => f.named.iter_mut(),
+            Fields::Unnamed(f) => f.unnamed.iter_mut(),
+        }
+    }
+
+    /// Returns the number of fields.
+    pub fn len(&self) -> usize {
+        match self {
+            Fields::Unit => 0,
+            Fields::Named(f) => f.named.len(),
+            Fields::Unnamed(f) => f.unnamed.len(),
+        }
+    }
+
+    /// Returns `true` if there are zero fields.
+    pub fn is_empty(&self) -> bool {
+        match self {
+            Fields::Unit => true,
+            Fields::Named(f) => f.named.is_empty(),
+            Fields::Unnamed(f) => f.unnamed.is_empty(),
+        }
+    }
+}
+
+impl IntoIterator for Fields {
+    type Item = Field;
+    type IntoIter = punctuated::IntoIter<Field>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        match self {
+            Fields::Unit => Punctuated::<Field, ()>::new().into_iter(),
+            Fields::Named(f) => f.named.into_iter(),
+            Fields::Unnamed(f) => f.unnamed.into_iter(),
+        }
+    }
+}
+
+impl<'a> IntoIterator for &'a Fields {
+    type Item = &'a Field;
+    type IntoIter = punctuated::Iter<'a, Field>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter()
+    }
+}
+
+impl<'a> IntoIterator for &'a mut Fields {
+    type Item = &'a mut Field;
+    type IntoIter = punctuated::IterMut<'a, Field>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter_mut()
+    }
+}
+
+ast_struct! {
+    /// A field of a struct or enum variant.
+    ///
+    /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+    /// feature.*
+    #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+    pub struct Field {
+        /// Attributes tagged on the field.
+        pub attrs: Vec<Attribute>,
+
+        /// Visibility of the field.
+        pub vis: Visibility,
+
+        /// Name of the field, if any.
+        ///
+        /// Fields of tuple structs have no names.
+        pub ident: Option<Ident>,
+
+        pub colon_token: Option<Token![:]>,
+
+        /// Type of the field.
+        pub ty: Type,
+    }
+}
+
+ast_enum_of_structs! {
+    /// The visibility level of an item: inherited or `pub` or
+    /// `pub(restricted)`.
+    ///
+    /// *This type is available only if Syn is built with the `"derive"` or `"full"`
+    /// feature.*
+    ///
+    /// # Syntax tree enum
+    ///
+    /// This type is a [syntax tree enum].
+    ///
+    /// [syntax tree enum]: Expr#syntax-tree-enums
+    #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+    pub enum Visibility {
+        /// A public visibility level: `pub`.
+        Public(VisPublic),
+
+        /// A crate-level visibility: `crate`.
+        Crate(VisCrate),
+
+        /// A visibility level restricted to some path: `pub(self)` or
+        /// `pub(super)` or `pub(crate)` or `pub(in some::module)`.
+        Restricted(VisRestricted),
+
+        /// An inherited visibility, which usually means private.
+        Inherited,
+    }
+}
+
+ast_struct! {
+    /// A public visibility level: `pub`.
+    ///
+    /// *This type is available only if Syn is built with the `"derive"` or
+    /// `"full"` feature.*
+    #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+    pub struct VisPublic {
+        pub pub_token: Token![pub],
+    }
+}
+
+ast_struct! {
+    /// A crate-level visibility: `crate`.
+    ///
+    /// *This type is available only if Syn is built with the `"derive"` or
+    /// `"full"` feature.*
+    #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+    pub struct VisCrate {
+        pub crate_token: Token![crate],
+    }
+}
+
+ast_struct! {
+    /// A visibility level restricted to some path: `pub(self)` or
+    /// `pub(super)` or `pub(crate)` or `pub(in some::module)`.
+    ///
+    /// *This type is available only if Syn is built with the `"derive"` or
+    /// `"full"` feature.*
+    #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))]
+    pub struct VisRestricted {
+        pub pub_token: Token![pub],
+        pub paren_token: token::Paren,
+        pub in_token: Option<Token![in]>,
+        pub path: Box<Path>,
+    }
+}
+
+#[cfg(feature = "parsing")]
+pub mod parsing {
+    use super::*;
+    use crate::ext::IdentExt;
+    use crate::parse::discouraged::Speculative;
+    use crate::parse::{Parse, ParseStream, Result};
+
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+    impl Parse for Variant {
+        fn parse(input: ParseStream) -> Result<Self> {
+            let attrs = input.call(Attribute::parse_outer)?;
+            let _visibility: Visibility = input.parse()?;
+            let ident: Ident = input.parse()?;
+            let fields = if input.peek(token::Brace) {
+                Fields::Named(input.parse()?)
+            } else if input.peek(token::Paren) {
+                Fields::Unnamed(input.parse()?)
+            } else {
+                Fields::Unit
+            };
+            let discriminant = if input.peek(Token![=]) {
+                let eq_token: Token![=] = input.parse()?;
+                let discriminant: Expr = input.parse()?;
+                Some((eq_token, discriminant))
+            } else {
+                None
+            };
+            Ok(Variant {
+                attrs,
+                ident,
+                fields,
+                discriminant,
+            })
+        }
+    }
+
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+    impl Parse for FieldsNamed {
+        fn parse(input: ParseStream) -> Result<Self> {
+            let content;
+            Ok(FieldsNamed {
+                brace_token: braced!(content in input),
+                named: content.parse_terminated(Field::parse_named)?,
+            })
+        }
+    }
+
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+    impl Parse for FieldsUnnamed {
+        fn parse(input: ParseStream) -> Result<Self> {
+            let content;
+            Ok(FieldsUnnamed {
+                paren_token: parenthesized!(content in input),
+                unnamed: content.parse_terminated(Field::parse_unnamed)?,
+            })
+        }
+    }
+
+    impl Field {
+        /// Parses a named (braced struct) field.
+        #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+        pub fn parse_named(input: ParseStream) -> Result<Self> {
+            Ok(Field {
+                attrs: input.call(Attribute::parse_outer)?,
+                vis: input.parse()?,
+                ident: Some(if input.peek(Token![_]) {
+                    input.call(Ident::parse_any)
+                } else {
+                    input.parse()
+                }?),
+                colon_token: Some(input.parse()?),
+                ty: input.parse()?,
+            })
+        }
+
+        /// Parses an unnamed (tuple struct) field.
+        #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+        pub fn parse_unnamed(input: ParseStream) -> Result<Self> {
+            Ok(Field {
+                attrs: input.call(Attribute::parse_outer)?,
+                vis: input.parse()?,
+                ident: None,
+                colon_token: None,
+                ty: input.parse()?,
+            })
+        }
+    }
+
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))]
+    impl Parse for Visibility {
+        fn parse(input: ParseStream) -> Result<Self> {
+            // Recognize an empty None-delimited group, as produced by a $:vis
+            // matcher that matched no tokens.
+            if input.peek(token::Group) {
+                let ahead = input.fork();
+                let group = crate::group::parse_group(&ahead)?;
+                if group.content.is_empty() {
+                    input.advance_to(&ahead);
+                    return Ok(Visibility::Inherited);
+                }
+            }
+
+            if input.peek(Token![pub]) {
+                Self::parse_pub(input)
+            } else if input.peek(Token![crate]) {
+                Self::parse_crate(input)
+            } else {
+                Ok(Visibility::Inherited)
+            }
+        }
+    }
+
+    impl Visibility {
+        fn parse_pub(input: ParseStream) -> Result<Self> {
+            let pub_token = input.parse::<Token![pub]>()?;
+
+            if input.peek(token::Paren) {
+                let ahead = input.fork();
+
+                let content;
+                let paren_token = parenthesized!(content in ahead);
+                if content.peek(Token![crate])
+                    || content.peek(Token![self])
+                    || content.peek(Token![super])
+                {
+                    let path = content.call(Ident::parse_any)?;
+
+                    // Ensure there are no additional tokens within `content`.
+                    // Without explicitly checking, we may misinterpret a tuple
+                    // field as a restricted visibility, causing a parse error.
+                    // e.g. `pub (crate::A, crate::B)` (Issue #720).
+                    if content.is_empty() {
+                        input.advance_to(&ahead);
+                        return Ok(Visibility::Restricted(VisRestricted {
+                            pub_token,
+                            paren_token,
+                            in_token: None,
+                            path: Box::new(Path::from(path)),
+                        }));
+                    }
+                } else if content.peek(Token![in]) {
+                    let in_token: Token![in] = content.parse()?;
+                    let path = content.call(Path::parse_mod_style)?;
+
+                    input.advance_to(&ahead);
+                    return Ok(Visibility::Restricted(VisRestricted {
+                        pub_token,
+                        paren_token,
+                        in_token: Some(in_token),
+                        path: Box::new(path),
+                    }));
+                }
+            }
+
+            Ok(Visibility::Public(VisPublic { pub_token }))
+        }
+
+        fn parse_crate(input: ParseStream) -> Result<Self> {
+            if input.peek2(Token![::]) {
+                Ok(Visibility::Inherited)
+            } else {
+                Ok(Visibility::Crate(VisCrate {
+                    crate_token: input.parse()?,
+                }))
+            }
+        }
+
+        #[cfg(feature = "full")]
+        pub(crate) fn is_some(&self) -> bool {
+            match self {
+                Visibility::Inherited => false,
+                _ => true,
+            }
+        }
+    }
+}
+
+#[cfg(feature = "printing")]
+mod printing {
+    use super::*;
+    use crate::print::TokensOrDefault;
+    use proc_macro2::TokenStream;
+    use quote::{ToTokens, TokenStreamExt};
+
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+    impl ToTokens for Variant {
+        fn to_tokens(&self, tokens: &mut TokenStream) {
+            tokens.append_all(&self.attrs);
+            self.ident.to_tokens(tokens);
+            self.fields.to_tokens(tokens);
+            if let Some((eq_token, disc)) = &self.discriminant {
+                eq_token.to_tokens(tokens);
+                disc.to_tokens(tokens);
+            }
+        }
+    }
+
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+    impl ToTokens for FieldsNamed {
+        fn to_tokens(&self, tokens: &mut TokenStream) {
+            self.brace_token.surround(tokens, |tokens| {
+                self.named.to_tokens(tokens);
+            });
+        }
+    }
+
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+    impl ToTokens for FieldsUnnamed {
+        fn to_tokens(&self, tokens: &mut TokenStream) {
+            self.paren_token.surround(tokens, |tokens| {
+                self.unnamed.to_tokens(tokens);
+            });
+        }
+    }
+
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+    impl ToTokens for Field {
+        fn to_tokens(&self, tokens: &mut TokenStream) {
+            tokens.append_all(&self.attrs);
+            self.vis.to_tokens(tokens);
+            if let Some(ident) = &self.ident {
+                ident.to_tokens(tokens);
+                TokensOrDefault(&self.colon_token).to_tokens(tokens);
+            }
+            self.ty.to_tokens(tokens);
+        }
+    }
+
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+    impl ToTokens for VisPublic {
+        fn to_tokens(&self, tokens: &mut TokenStream) {
+            self.pub_token.to_tokens(tokens);
+        }
+    }
+
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+    impl ToTokens for VisCrate {
+        fn to_tokens(&self, tokens: &mut TokenStream) {
+            self.crate_token.to_tokens(tokens);
+        }
+    }
+
+    #[cfg_attr(doc_cfg, doc(cfg(feature = "printing")))]
+    impl ToTokens for VisRestricted {
+        fn to_tokens(&self, tokens: &mut TokenStream) {
+            self.pub_token.to_tokens(tokens);
+            self.paren_token.surround(tokens, |tokens| {
+                // TODO: If we have a path which is not "self" or "super" or
+                // "crate", automatically add the "in" token.
+                self.in_token.to_tokens(tokens);
+                self.path.to_tokens(tokens);
+            });
+        }
+    }
+}