rust/syn/group.rs

Source file repositories/reference/linux-study-clean/rust/syn/group.rs

File Facts

System
Linux kernel
Corpus path
rust/syn/group.rs
Extension
.rs
Size
7935 bytes
Lines
294
Domain
Rust Kernel Layer
Bucket
Rust API Membrane
Inferred role
Rust Kernel Layer: implementation source
Status
source implementation candidate

Why This File Exists

Rust-side wrappers and abstractions around kernel C APIs, ownership contracts, allocation, synchronization, and module integration.

Dependency Surface

Detected Declarations

Annotated Snippet

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 {

Annotation

Implementation Notes