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Allow soft failure of the macro parser.

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This commit is contained in:
Paul Stansifer
2012-07-05 17:33:39 -07:00
parent 7f9b1fbe35
commit a8112f3b34
2 changed files with 23 additions and 14 deletions
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8
src/libsyntax/parse/parser.rs
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@@ -1210,7 +1210,7 @@ class parser {
/* temporary */
fn parse_tt_mac_demo() -> @expr {
import ext::tt::earley_parser::{parse,success,failure};
let name_idx = @mut 0u;
let ms = self.parse_seq(token::LBRACE, token::RBRACE,
common::seq_sep_none(),
@@ -1225,8 +1225,10 @@ class parser {
self.reader.interner(), none, tts)
as reader;
let matches = ext::tt::earley_parser::parse
(self.sess, self.cfg, rdr, ms);
let matches = alt parse(self.sess, self.cfg, rdr, ms) {
success(m) { m }
failure(sp, msg) { self.span_fatal(sp,msg); }
};
let transcriber = ext::tt::transcribe::new_tt_reader
(self.reader.span_diag(), self.reader.interner(),