OpenE2K/rust
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Rollup merge of #60620 - mark-i-m:transcribe-2, r=petrochenkov

Browse Source 
Fix a couple of FIXMEs in ext::tt::transcribe

_Blocked on #60618_

A crater run would be nice to make sure my understanding is correct. A quick google search seems to indicate these are extremely rare errors if they are possible (which I don't believe they are).

r? @petrochenkov

cc #2887 (there is only one FIXME left and it is hygiene-related)
This commit is contained in:
Mazdak Farrokhzad 2019-05-10 20:31:07 +02:00 committed by GitHub
commit 20dff29b35
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/libsyntax/ext/tt/transcribe.rs
View File

@ -170,10 +170,9 @@ pub fn transcribe(
}
LockstepIterSize::Contradiction(ref msg) => {
// FIXME: this should be impossible. I (mark-i-m) believe it would
// represent a bug in the macro_parser.
// FIXME #2887 blame macro invoker instead
cx.span_fatal(seq.span(), &msg[..]);
// This should never happen because the macro parser should generate
// properly-sized matches for all meta-vars.
cx.span_bug(seq.span(), &msg[..]);
}
LockstepIterSize::Constraint(len, _) => {
@ -188,10 +187,9 @@ pub fn transcribe(
// Is the repetition empty?
if len == 0 {
if seq.op == quoted::KleeneOp::OneOrMore {
// FIXME: this should be impossible because we check for this in
// macro_parser.rs
// FIXME #2887 blame invoker
cx.span_fatal(sp.entire(), "this must repeat at least once");
// This should be impossible because the macro parser would not
// match the given macro arm.
cx.span_bug(sp.entire(), "this must repeat at least once");
}
} else {
// 0 is the initial counter (we have done 0 repretitions so far). `len`