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tamer: xir::parse::ele: Remove `unreachable!` in state transitions 

This will instead fail at compile time.

DEV-7145
main
Mike Gerwitz 2022-09-14 09:57:33 -04:00
parent a5c7067c68
commit db3fd3f177
1 changed files with 15 additions and 6 deletions
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21
tamer/src/xir/parse/ele.rs
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@ -393,6 +393,17 @@ macro_rules! ele_parse {
)
};
// Same as above,
// but in situations where we will never transition to a done state.
(@!ntref_delegate_nodone
$stack:ident, $ret:expr, $ntnext_st:ty, $target:expr
) => {
$stack.transfer_with_ret(
Transition($ret),
$target,
)
};
(@!ele_dfn_body <$objty:ty, $($evty:ty)?>
$vis:vis $super:ident $(#[$nt_attr:meta])* $nt:ident $qname:ident
($($qname_matched:pat, $open_span:pat)?)
@ -1248,7 +1259,7 @@ macro_rules! ele_parse {
st @ (Expecting_ | NonPreemptableExpecting_),
XirfToken::Open(qname, span, depth)
) if $ntref::matches(qname) => {
ele_parse!(@!ntref_delegate
ele_parse!(@!ntref_delegate_nodone
stack,
Expecting_,
$ntref,
@ -1268,8 +1279,7 @@ macro_rules! ele_parse {
}
).incomplete().with_lookahead(
XirfToken::Open(qname, span, depth)
),
unreachable!("TODO: remove me (ntref_delegate done)")
)
)
},
@ -1277,7 +1287,7 @@ macro_rules! ele_parse {
NonPreemptableExpecting_,
XirfToken::Open(qname, span, depth)
) if $ntref::matches(qname) => {
ele_parse!(@!ntref_delegate
ele_parse!(@!ntref_delegate_nodone
stack,
Expecting_,
$ntref,
@ -1285,8 +1295,7 @@ macro_rules! ele_parse {
$ntref::NonPreemptableExpecting_
).incomplete().with_lookahead(
XirfToken::Open(qname, span, depth)
),
unreachable!("TODO: remove me (ntref_delegate done)")
)
)
},
)*