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Combine HasAttrs and HasTokens into AstLike

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When token-based attribute handling is implemeneted in #80689,
we will need to access tokens from `HasAttrs` (to perform
cfg-stripping), and we will to access attributes from `HasTokens` (to
construct a `PreexpTokenStream`).

This PR merges the `HasAttrs` and `HasTokens` traits into a new
`AstLike` trait. The previous `HasAttrs` impls from `Vec<Attribute>` and `AttrVec`
are removed - they aren't attribute targets, so the impls never really
made sense.
This commit is contained in:
Aaron Hill 2021-02-23 10:21:20 -05:00
parent 9fa580b117
commit fb5fec017b
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13 changed files with 264 additions and 206 deletions
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4
compiler/rustc_parse/src/parser/attr_wrapper.rs
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@ -3,7 +3,7 @@ use super::{ForceCollect, Parser, TokenCursor, TrailingToken};
use rustc_ast::token::{self, Token, TokenKind};
use rustc_ast::tokenstream::{CreateTokenStream, TokenStream, TokenTree, TreeAndSpacing};
use rustc_ast::tokenstream::{DelimSpan, LazyTokenStream, Spacing};
use rustc_ast::HasTokens;
use rustc_ast::AstLike;
use rustc_ast::{self as ast};
use rustc_errors::PResult;
use rustc_span::{Span, DUMMY_SP};
@ -59,7 +59,7 @@ impl<'a> Parser<'a> {
/// This restriction shouldn't be an issue in practice,
/// since this function is used to record the tokens for
/// a parsed AST item, which always has matching delimiters.
pub fn collect_tokens_trailing_token<R: HasTokens>(
pub fn collect_tokens_trailing_token<R: AstLike>(
&mut self,
attrs: AttrWrapper,
force_collect: ForceCollect,