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libsyntax: Implement the new box syntax for unique pointers.

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This commit is contained in:
Patrick Walton 2013-12-12 10:42:03 -08:00
parent a87786e3e9
commit 775ccadd25
3 changed files with 33 additions and 7 deletions
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16
src/libsyntax/parse/parser.rs
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@ -2326,6 +2326,22 @@ impl Parser {
_ => self.mk_unary(UnUniq, e)
};
}
token::IDENT(_, _) if self.is_keyword(keywords::Box) => {
self.bump();
let subexpression = self.parse_prefix_expr();
hi = subexpression.span.hi;
// HACK: turn `box [...]` into a boxed-evec
ex = match subexpression.node {
ExprVec(..) |
ExprLit(@codemap::Spanned {
node: lit_str(..),
span: _
}) |
ExprRepeat(..) => ExprVstore(subexpression, ExprVstoreUniq),
_ => self.mk_unary(UnUniq, subexpression)
};
}
_ => return self.parse_dot_or_call_expr()
}
return self.mk_expr(lo, hi, ex);