diff options
Diffstat (limited to 'vendor/syn/src/data.rs')
| -rw-r--r-- | vendor/syn/src/data.rs | 404 |
1 files changed, 0 insertions, 404 deletions
diff --git a/vendor/syn/src/data.rs b/vendor/syn/src/data.rs deleted file mode 100644 index 134b76b..0000000 --- a/vendor/syn/src/data.rs +++ /dev/null @@ -1,404 +0,0 @@ -use super::*; -use crate::punctuated::Punctuated; - -ast_struct! { - /// An enum variant. - #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))] - pub struct 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. - /// - /// # 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 }`. - #[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)`. - #[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. - #[cfg_attr(doc_cfg, doc(cfg(any(feature = "full", feature = "derive"))))] - pub struct Field { - pub attrs: Vec<Attribute>, - - pub vis: Visibility, - - pub mutability: FieldMutability, - - /// Name of the field, if any. - /// - /// Fields of tuple structs have no names. - pub ident: Option<Ident>, - - pub colon_token: Option<Token![:]>, - - pub ty: Type, - } -} - -#[cfg(feature = "parsing")] -pub(crate) mod parsing { - use super::*; - use crate::ext::IdentExt as _; - #[cfg(not(feature = "full"))] - use crate::parse::discouraged::Speculative as _; - 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()?; - #[cfg(feature = "full")] - let discriminant: Expr = input.parse()?; - #[cfg(not(feature = "full"))] - let discriminant = { - let begin = input.fork(); - let ahead = input.fork(); - let mut discriminant: Result<Expr> = ahead.parse(); - if discriminant.is_ok() { - input.advance_to(&ahead); - } else if scan_lenient_discriminant(input).is_ok() { - discriminant = Ok(Expr::Verbatim(verbatim::between(&begin, input))); - } - discriminant? - }; - Some((eq_token, discriminant)) - } else { - None - }; - Ok(Variant { - attrs, - ident, - fields, - discriminant, - }) - } - } - - #[cfg(not(feature = "full"))] - pub(crate) fn scan_lenient_discriminant(input: ParseStream) -> Result<()> { - use proc_macro2::Delimiter::{self, Brace, Bracket, Parenthesis}; - - let consume = |delimiter: Delimiter| { - Result::unwrap(input.step(|cursor| match cursor.group(delimiter) { - Some((_inside, _span, rest)) => Ok((true, rest)), - None => Ok((false, *cursor)), - })) - }; - - macro_rules! consume { - [$token:tt] => { - input.parse::<Option<Token![$token]>>().unwrap().is_some() - }; - } - - let mut initial = true; - let mut depth = 0usize; - loop { - if initial { - if consume![&] { - input.parse::<Option<Token![mut]>>()?; - } else if consume![if] || consume![match] || consume![while] { - depth += 1; - } else if input.parse::<Option<Lit>>()?.is_some() - || (consume(Brace) || consume(Bracket) || consume(Parenthesis)) - || (consume![async] || consume![const] || consume![loop] || consume![unsafe]) - && (consume(Brace) || break) - { - initial = false; - } else if consume![let] { - while !consume![=] { - if !((consume![|] || consume![ref] || consume![mut] || consume![@]) - || (consume![!] || input.parse::<Option<Lit>>()?.is_some()) - || (consume![..=] || consume![..] || consume![&] || consume![_]) - || (consume(Brace) || consume(Bracket) || consume(Parenthesis))) - { - path::parsing::qpath(input, true)?; - } - } - } else if input.parse::<Option<Lifetime>>()?.is_some() && !consume![:] { - break; - } else if input.parse::<UnOp>().is_err() { - path::parsing::qpath(input, true)?; - initial = consume![!] || depth == 0 && input.peek(token::Brace); - } - } else if input.is_empty() || input.peek(Token![,]) { - return Ok(()); - } else if depth > 0 && consume(Brace) { - if consume![else] && !consume(Brace) { - initial = consume![if] || break; - } else { - depth -= 1; - } - } else if input.parse::<BinOp>().is_ok() || (consume![..] | consume![=]) { - initial = true; - } else if consume![.] { - if input.parse::<Option<LitFloat>>()?.is_none() - && (input.parse::<Member>()?.is_named() && consume![::]) - { - AngleBracketedGenericArguments::do_parse(None, input)?; - } - } else if consume![as] { - input.parse::<Type>()?; - } else if !(consume(Brace) || consume(Bracket) || consume(Parenthesis)) { - break; - } - } - - Err(input.error("unsupported expression")) - } - - #[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, Token![,])?, - }) - } - } - - #[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, Token![,])?, - }) - } - } - - impl Field { - /// Parses a named (braced struct) field. - #[cfg_attr(doc_cfg, doc(cfg(feature = "parsing")))] - pub fn parse_named(input: ParseStream) -> Result<Self> { - let attrs = input.call(Attribute::parse_outer)?; - let vis: Visibility = input.parse()?; - - let unnamed_field = cfg!(feature = "full") && input.peek(Token![_]); - let ident = if unnamed_field { - input.call(Ident::parse_any) - } else { - input.parse() - }?; - - let colon_token: Token![:] = input.parse()?; - - let ty: Type = if unnamed_field - && (input.peek(Token![struct]) - || input.peek(Token![union]) && input.peek2(token::Brace)) - { - let begin = input.fork(); - input.call(Ident::parse_any)?; - input.parse::<FieldsNamed>()?; - Type::Verbatim(verbatim::between(&begin, input)) - } else { - input.parse()? - }; - - Ok(Field { - attrs, - vis, - mutability: FieldMutability::None, - ident: Some(ident), - colon_token: Some(colon_token), - ty, - }) - } - - /// 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()?, - mutability: FieldMutability::None, - ident: None, - colon_token: None, - ty: input.parse()?, - }) - } - } -} - -#[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); - } - } -} |