Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294// SPDX-License-Identifier: Apache-2.0 OR MIT
use crate::error::Result;use crate::parse::ParseBuffer;use crate::token;use proc_macro2::extra::DelimSpan;use proc_macro2::Delimiter;
// Not public API.#[doc(hidden)]pub struct Parens<'a> { #[doc(hidden)] pub token: token::Paren, #[doc(hidden)] pub content: ParseBuffer<'a>,}
// Not public API.#[doc(hidden)]pub struct Braces<'a> { #[doc(hidden)] pub token: token::Brace, #[doc(hidden)] pub content: ParseBuffer<'a>,}
// Not public API.#[doc(hidden)]pub struct Brackets<'a> { #[doc(hidden)] pub token: token::Bracket, #[doc(hidden)] pub content: ParseBuffer<'a>,}
// Not public API.#[cfg(any(feature = "full", feature = "derive"))]#[doc(hidden)]pub struct Group<'a> { #[doc(hidden)] pub token: token::Group, #[doc(hidden)] pub content: ParseBuffer<'a>,}
// Not public API.#[doc(hidden)]pub fn parse_parens<'a>(input: &ParseBuffer<'a>) -> Result<Parens<'a>> { parse_delimited(input, Delimiter::Parenthesis).map(|(span, content)| Parens { token: token::Paren(span), content, })}
// Not public API.#[doc(hidden)]pub fn parse_braces<'a>(input: &ParseBuffer<'a>) -> Result<Braces<'a>> { parse_delimited(input, Delimiter::Brace).map(|(span, content)| Braces { token: token::Brace(span), content, })}
// Not public API.#[doc(hidden)]pub fn parse_brackets<'a>(input: &ParseBuffer<'a>) -> Result<Brackets<'a>> { parse_delimited(input, Delimiter::Bracket).map(|(span, content)| Brackets { token: token::Bracket(span), content, })}
#[cfg(any(feature = "full", feature = "derive"))]pub(crate) fn parse_group<'a>(input: &ParseBuffer<'a>) -> Result<Group<'a>> { parse_delimited(input, Delimiter::None).map(|(span, content)| Group { token: token::Group(span.join()), content, })}
fn parse_delimited<'a>( input: &ParseBuffer<'a>, delimiter: Delimiter,) -> Result<(DelimSpan, ParseBuffer<'a>)> { input.step(|cursor| { if let Some((content, span, rest)) = cursor.group(delimiter) { let scope = span.close(); let nested = crate::parse::advance_step_cursor(cursor, content); let unexpected = crate::parse::get_unexpected(input); let content = crate::parse::new_parse_buffer(scope, nested, unexpected); Ok(((span, content), rest)) } else { let message = match delimiter { Delimiter::Parenthesis => "expected parentheses", Delimiter::Brace => "expected curly braces", Delimiter::Bracket => "expected square brackets", Delimiter::None => "expected invisible group", }; Err(cursor.error(message)) } })}
/// Parse a set of parentheses and expose their content to subsequent parsers.////// # Example////// ```/// # use quote::quote;/// #/// use syn::{parenthesized, token, Ident, Result, Token, Type};/// use syn::parse::{Parse, ParseStream};/// use syn::punctuated::Punctuated;////// // Parse a simplified tuple struct syntax like:/// ///// // struct S(A, B);/// struct TupleStruct {/// struct_token: Token![struct],/// ident: Ident,/// paren_token: token::Paren,/// fields: Punctuated<Type, Token![,]>,/// semi_token: Token![;],/// }////// impl Parse for TupleStruct {/// fn parse(input: ParseStream) -> Result<Self> {/// let content;/// Ok(TupleStruct {/// struct_token: input.parse()?,/// ident: input.parse()?,/// paren_token: parenthesized!(content in input),/// fields: content.parse_terminated(Type::parse, Token![,])?,/// semi_token: input.parse()?,/// })/// }/// }/// #/// # fn main() {/// # let input = quote! {/// # struct S(A, B);/// # };/// # syn::parse2::<TupleStruct>(input).unwrap();/// # }/// ```#[macro_export]#[cfg_attr(docsrs, doc(cfg(feature = "parsing")))]macro_rules! parenthesized { ($content:ident in $cursor:expr) => { match $crate::__private::parse_parens(&$cursor) { $crate::__private::Ok(parens) => { $content = parens.content; parens.token } $crate::__private::Err(error) => { return $crate::__private::Err(error); } } };}
/// Parse a set of curly braces and expose their content to subsequent parsers.////// # Example////// ```/// # use quote::quote;/// #/// use syn::{braced, token, Ident, Result, Token, Type};/// use syn::parse::{Parse, ParseStream};/// use syn::punctuated::Punctuated;////// // Parse a simplified struct syntax like:/// ///// // struct S {/// // a: A,/// // b: B,/// // }/// struct Struct {/// struct_token: Token![struct],/// ident: Ident,/// brace_token: token::Brace,/// fields: Punctuated<Field, Token![,]>,/// }////// struct Field {/// name: Ident,/// colon_token: Token![:],/// ty: Type,/// }////// impl Parse for Struct {/// fn parse(input: ParseStream) -> Result<Self> {/// let content;/// Ok(Struct {/// struct_token: input.parse()?,/// ident: input.parse()?,/// brace_token: braced!(content in input),/// fields: content.parse_terminated(Field::parse, Token![,])?,/// })/// }/// }////// impl Parse for Field {/// fn parse(input: ParseStream) -> Result<Self> {/// Ok(Field {/// name: input.parse()?,/// colon_token: input.parse()?,/// ty: input.parse()?,/// })/// }/// }/// #/// # fn main() {/// # let input = quote! {/// # struct S {/// # a: A,/// # b: B,/// # }/// # };/// # syn::parse2::<Struct>(input).unwrap();/// # }/// ```#[macro_export]#[cfg_attr(docsrs, doc(cfg(feature = "parsing")))]macro_rules! braced { ($content:ident in $cursor:expr) => { match $crate::__private::parse_braces(&$cursor) { $crate::__private::Ok(braces) => { $content = braces.content; braces.token } $crate::__private::Err(error) => { return $crate::__private::Err(error); } } };}
/// Parse a set of square brackets and expose their content to subsequent/// parsers.////// # Example////// ```/// # use quote::quote;/// #/// use proc_macro2::TokenStream;/// use syn::{bracketed, token, Result, Token};/// use syn::parse::{Parse, ParseStream};////// // Parse an outer attribute like:/// ///// // #[repr(C, packed)]/// struct OuterAttribute {/// pound_token: Token![#],/// bracket_token: token::Bracket,/// content: TokenStream,/// }////// impl Parse for OuterAttribute {/// fn parse(input: ParseStream) -> Result<Self> {/// let content;/// Ok(OuterAttribute {/// pound_token: input.parse()?,/// bracket_token: bracketed!(content in input),/// content: content.parse()?,/// })/// }/// }/// #/// # fn main() {/// # let input = quote! {/// # #[repr(C, packed)]/// # };/// # syn::parse2::<OuterAttribute>(input).unwrap();/// # }/// ```#[macro_export]#[cfg_attr(docsrs, doc(cfg(feature = "parsing")))]macro_rules! bracketed { ($content:ident in $cursor:expr) => { match $crate::__private::parse_brackets(&$cursor) { $crate::__private::Ok(brackets) => { $content = brackets.content; brackets.token } $crate::__private::Err(error) => { return $crate::__private::Err(error); } } };}