Function rustc_expand::mbe::quoted::parse

pub(super) fn parse(
    input: TokenStream, 
    expect_matchers: bool, 
    sess: &ParseSess, 
    node_id: NodeId, 
    features: &Features
) -> Vec<TokenTree>

Takes a tokenstream::TokenStream and returns a Vec<self::TokenTree>. Specifically, this takes a generic TokenStream, such as is used in the rest of the compiler, and returns a collection of TokenTree for use in parsing a macro.

Parameters

• input: a token stream to read from, the contents of which we are parsing.
• expect_matchers: parse can be used to parse either the “patterns” or the “body” of a macro. Both take roughly the same form except that in a pattern, metavars are declared with their “matcher” type. For example $var:expr or $id:ident. In this example, expr and ident are “matchers”. They are not present in the body of a macro rule – just in the pattern, so we pass a parameter to indicate whether to expect them or not.
• sess: the parsing session. Any errors will be emitted to this session.
• node_id: the NodeId of the macro we are parsing.
• features: language features so we can do feature gating.

Returns

A collection of self::TokenTree. There may also be some errors emitted to sess.