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Factor out NamedParseResult.

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This commit is contained in:
Mark-Simulacrum 2016-11-07 19:40:00 -07:00
parent eef10d0b5b
commit 68abb24e8d
1 changed files with 3 additions and 4 deletions
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7
src/libsyntax/ext/tt/macro_parser.rs
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@ -143,6 +143,8 @@ pub struct MatcherPos {
sp_lo: BytePos,
}
pub type NamedParseResult = ParseResult<HashMap<Ident, Rc<NamedMatch>>>;
pub fn count_names(ms: &[TokenTree]) -> usize {
ms.iter().fold(0, |count, elt| {
count + match *elt {
@ -200,8 +202,7 @@ pub enum NamedMatch {
MatchedNonterminal(Rc<Nonterminal>)
}
fn nameize(ms: &[TokenTree], res: &[Rc<NamedMatch>])
-> ParseResult<HashMap<Ident, Rc<NamedMatch>>> {
fn nameize(ms: &[TokenTree], res: &[Rc<NamedMatch>]) -> NamedParseResult {
fn n_rec(m: &TokenTree, res: &[Rc<NamedMatch>],
ret_val: &mut HashMap<Ident, Rc<NamedMatch>>, idx: &mut usize)
-> Result<(), (syntax_pos::Span, String)> {
@ -265,8 +266,6 @@ pub fn parse_failure_msg(tok: Token) -> String {
}
}
pub type NamedParseResult = ParseResult<HashMap<Ident, Rc<NamedMatch>>>;
/// Perform a token equality check, ignoring syntax context (that is, an
/// unhygienic comparison)
pub fn token_name_eq(t1 : &Token, t2 : &Token) -> bool {