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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/syn/src/parse_macro_input.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
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diff --git a/vendor/syn/src/parse_macro_input.rs b/vendor/syn/src/parse_macro_input.rs
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-/// Parse the input TokenStream of a macro, triggering a compile error if the
-/// tokens fail to parse.
-///
-/// Refer to the [`parse` module] documentation for more details about parsing
-/// in Syn.
-///
-/// [`parse` module]: mod@crate::parse
-///
-/// <br>
-///
-/// # Intended usage
-///
-/// This macro must be called from a function that returns
-/// `proc_macro::TokenStream`. Usually this will be your proc macro entry point,
-/// the function that has the #\[proc_macro\] / #\[proc_macro_derive\] /
-/// #\[proc_macro_attribute\] attribute.
-///
-/// ```
-/// # extern crate proc_macro;
-/// #
-/// use proc_macro::TokenStream;
-/// use syn::{parse_macro_input, Result};
-/// use syn::parse::{Parse, ParseStream};
-///
-/// struct MyMacroInput {
-/// /* ... */
-/// }
-///
-/// impl Parse for MyMacroInput {
-/// fn parse(input: ParseStream) -> Result<Self> {
-/// /* ... */
-/// # Ok(MyMacroInput {})
-/// }
-/// }
-///
-/// # const IGNORE: &str = stringify! {
-/// #[proc_macro]
-/// # };
-/// pub fn my_macro(tokens: TokenStream) -> TokenStream {
-/// let input = parse_macro_input!(tokens as MyMacroInput);
-///
-/// /* ... */
-/// # TokenStream::new()
-/// }
-/// ```
-///
-/// <br>
-///
-/// # Usage with Parser
-///
-/// This macro can also be used with the [`Parser` trait] for types that have
-/// multiple ways that they can be parsed.
-///
-/// [`Parser` trait]: crate::parse::Parser
-///
-/// ```
-/// # extern crate proc_macro;
-/// #
-/// # use proc_macro::TokenStream;
-/// # use syn::{parse_macro_input, Result};
-/// # use syn::parse::ParseStream;
-/// #
-/// # struct MyMacroInput {}
-/// #
-/// impl MyMacroInput {
-/// fn parse_alternate(input: ParseStream) -> Result<Self> {
-/// /* ... */
-/// # Ok(MyMacroInput {})
-/// }
-/// }
-///
-/// # const IGNORE: &str = stringify! {
-/// #[proc_macro]
-/// # };
-/// pub fn my_macro(tokens: TokenStream) -> TokenStream {
-/// let input = parse_macro_input!(tokens with MyMacroInput::parse_alternate);
-///
-/// /* ... */
-/// # TokenStream::new()
-/// }
-/// ```
-///
-/// <br>
-///
-/// # Expansion
-///
-/// `parse_macro_input!($variable as $Type)` expands to something like:
-///
-/// ```no_run
-/// # extern crate proc_macro;
-/// #
-/// # macro_rules! doc_test {
-/// # ($variable:ident as $Type:ty) => {
-/// match syn::parse::<$Type>($variable) {
-/// Ok(syntax_tree) => syntax_tree,
-/// Err(err) => return proc_macro::TokenStream::from(err.to_compile_error()),
-/// }
-/// # };
-/// # }
-/// #
-/// # fn test(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
-/// # let _ = doc_test!(input as syn::Ident);
-/// # proc_macro::TokenStream::new()
-/// # }
-/// ```
-#[macro_export]
-#[cfg_attr(doc_cfg, doc(cfg(all(feature = "parsing", feature = "proc-macro"))))]
-macro_rules! parse_macro_input {
- ($tokenstream:ident as $ty:ty) => {
- match $crate::parse::<$ty>($tokenstream) {
- $crate::__private::Ok(data) => data,
- $crate::__private::Err(err) => {
- return $crate::__private::TokenStream::from(err.to_compile_error());
- }
- }
- };
- ($tokenstream:ident with $parser:path) => {
- match $crate::parse::Parser::parse($parser, $tokenstream) {
- $crate::__private::Ok(data) => data,
- $crate::__private::Err(err) => {
- return $crate::__private::TokenStream::from(err.to_compile_error());
- }
- }
- };
- ($tokenstream:ident) => {
- $crate::parse_macro_input!($tokenstream as _)
- };
-}