Go patch committed: Better error message for missing if condition

[Ian Lance Taylor]

This patch to the Go frontend gives a better error message when the
condition is omitted from an if statement.  Bootstrapped and ran Go
testsuite on x86_64-unknown-linux-gnu.  Committed to mainline.

Ian


diff -r a05deef47b01 go/parse.cc
--- a/go/parse.cc	Mon Mar 28 15:48:35 2011 -0700
+++ b/go/parse.cc	Mon Mar 28 15:52:15 2011 -0700
@@ -3779,6 +3779,12 @@
 	  if (!this->expression_may_start_here())
 	    cond = Expression::make_error(this->location());
 	}
+      if (cond == NULL && this->peek_token()->is_op(OPERATOR_LCURLY))
+	{
+	  error_at(this->location(),
+		   "missing condition in if statement");
+	  cond = Expression::make_error(this->location());
+	}
       if (cond == NULL)
 	cond = this->expression(PRECEDENCE_NORMAL, false, false, NULL);
     }