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Update section following current state

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Yuki Okushi 2020-02-15 07:45:22 +09:00 committed by Who? Me?!
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src/macro-expansion.md
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@ -69,14 +69,13 @@ defined in [`src/librustc_expand/mbe/macro_parser.rs`][code_mp].
The interface of the macro parser is as follows (this is slightly simplified): The interface of the macro parser is as follows (this is slightly simplified):
```rust,ignore ```rust,ignore
fn parse( fn parse_tt(
sess: ParserSession, parser: &mut Cow<Parser>,
tts: TokenStream, ms: &[TokenTree],
ms: &[TokenTree]
) -> NamedParseResult ) -> NamedParseResult
``` ```
In this interface: We use these items in macro parser:
- `sess` is a "parsing session", which keeps track of some metadata. Most - `sess` is a "parsing session", which keeps track of some metadata. Most
notably, this is used to keep track of errors that are generated so they can notably, this is used to keep track of errors that are generated so they can