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Correctly parse select case <-c <- v.

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From-SVN: r171540
This commit is contained in:
Ian Lance Taylor 2011-03-26 05:32:46 +00:00
parent 8ac5e12e5f
commit e2e5c70f5c
1 changed files with 12 additions and 4 deletions
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16
gcc/go/gofrontend/parse.cc
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@ -4375,16 +4375,24 @@ Parse::send_or_recv_stmt(bool* is_send, Expression** channel, Expression** val,
// send or receive expression. If SAW_COMMA is true, then *VAL is
// set and we just read a comma.
if (!saw_comma && this->peek_token()->is_op(OPERATOR_CHANOP))
Expression* e;
if (saw_comma || !this->peek_token()->is_op(OPERATOR_CHANOP))
e = this->expression(PRECEDENCE_NORMAL, true, true, NULL);
else
{
// case <-c:
*is_send = false;
this->advance_token();
*channel = this->expression(PRECEDENCE_NORMAL, false, true, NULL);
return true;
}
Expression* e = this->expression(PRECEDENCE_NORMAL, true, true, NULL);
// The next token should be ':'. If it is '<-', then we have
// case <-c <- v:
// which is to say, send on a channel received from a channel.
if (!this->peek_token()->is_op(OPERATOR_CHANOP))
return true;
e = Expression::make_receive(*channel, (*channel)->location());
}
if (this->peek_token()->is_op(OPERATOR_EQ))
{