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'label can start expressions #50155

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Merged
merged 2 commits into from
Apr 28, 2018
Merged

'label can start expressions #50155

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40f2ca2
'label can start expressions
est31 Apr 22, 2018
edee60d
Add tests
est31 Apr 23, 2018
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'label can start expressions 
let foo = 'label: loop { break 'label 42; };

is valid Rust code.
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@est31
est31 committed Apr 23, 2018
commit 40f2ca2c95f374ceeb13169af77db9d17901c001
3 changes: 2 additions & 1 deletion src/libsyntax/parse/token.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -277,9 +277,10 @@ impl Token {
DotDot | DotDotDot | DotDotEq | // range notation
Lt | BinOp(Shl) | // associated path
ModSep | // global path
Lifetime(..) | // labeled loop
Pound => true, // expression attributes
Interpolated(ref nt) => match nt.0 {
NtIdent(..) | NtExpr(..) | NtBlock(..) | NtPath(..) => true,
NtIdent(..) | NtExpr(..) | NtBlock(..) | NtPath(..) | NtLifetime(..) => true,
_ => false,
},
_ => false,
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