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r00ster91 2021-06-20 22:19:47 +02:00
parent dd941450fb
commit f804d8d71b
1 changed files with 9 additions and 6 deletions
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15
library/proc_macro/src/lib.rs
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@ -766,7 +766,7 @@ impl fmt::Debug for Group {
} }
} }
/// An `Punct` is an single punctuation character like `+`, `-` or `#`. /// A `Punct` is a single punctuation character such as `+`, `-` or `#`.
/// ///
/// Multi-character operators like `+=` are represented as two instances of `Punct` with different /// Multi-character operators like `+=` are represented as two instances of `Punct` with different
/// forms of `Spacing` returned. /// forms of `Spacing` returned.
@ -779,16 +779,19 @@ impl !Send for Punct {}
#[stable(feature = "proc_macro_lib2", since = "1.29.0")] #[stable(feature = "proc_macro_lib2", since = "1.29.0")]
impl !Sync for Punct {} impl !Sync for Punct {}
/// Whether an `Punct` is followed immediately by another `Punct` or /// Describes whether a `Punct` is followed immediately by another `Punct` ([`Spacing::Joint`]) or
/// followed by another token or whitespace. /// by a different token or whitespace ([`Spacing::Alone`]).
#[derive(Copy, Clone, Debug, PartialEq, Eq)] #[derive(Copy, Clone, Debug, PartialEq, Eq)]
#[stable(feature = "proc_macro_lib2", since = "1.29.0")] #[stable(feature = "proc_macro_lib2", since = "1.29.0")]
pub enum Spacing { pub enum Spacing {
/// e.g., `+` is `Alone` in `+ =`, `+ident` or `+()`. /// A `Punct` is not immediately followed by another `Punct`.
/// E.g. `+` is `Alone` in `+ =`, `+ident` and `+()`.
#[stable(feature = "proc_macro_lib2", since = "1.29.0")] #[stable(feature = "proc_macro_lib2", since = "1.29.0")]
Alone, Alone,
/// e.g., `+` is `Joint` in `+=` or `'#`. /// A `Punct` is immediately followed by another `Punct`.
/// Additionally, single quote `'` can join with identifiers to form lifetimes `'ident`. /// E.g. `+` is `Joint` in `+=` and `++`.
///
/// Additionally, single quote `'` can join with identifiers to form lifetimes: `'ident`.
#[stable(feature = "proc_macro_lib2", since = "1.29.0")] #[stable(feature = "proc_macro_lib2", since = "1.29.0")]
Joint, Joint,
} }