Function rustc_expand::mbe::quoted::parse_tree
source · fn parse_tree<'a>(
tree: &'a TokenTree,
outer_trees: &mut impl Iterator<Item = &'a TokenTree>,
parsing_patterns: bool,
sess: &ParseSess,
node_id: NodeId,
features: &Features,
edition: Edition
) -> TokenTree
Expand description
Takes a tokenstream::TokenTree
and returns a self::TokenTree
. Specifically, this takes a
generic TokenTree
, such as is used in the rest of the compiler, and returns a TokenTree
for use in parsing a macro.
Converting the given tree may involve reading more tokens.
Parameters
tree
: the tree we wish to convert.outer_trees
: an iterator over trees. We may need to read more tokens from it in order to finish convertingtree
parsing_patterns
: same as parse.sess
: the parsing session. Any errors will be emitted to this session.features
: language features so we can do feature gating.