From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Wed, 26 Jun 2013 22:58:03 +0000 (+0000)
Subject: compiler: disallow fallthrough in last case of switch.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=33e84ed46b1dd6330abdfe8bcec9444a1f5d2397;p=gcc.git

compiler: disallow fallthrough in last case of switch.

In spec: A "fallthrough" statement may appear as the last
statement of all but the last clause of an expression switch.

From-SVN: r200440
---

diff --git a/gcc/go/gofrontend/parse.cc b/gcc/go/gofrontend/parse.cc
index 0a67bbe4060..5a9feb7280b 100644
--- a/gcc/go/gofrontend/parse.cc
+++ b/gcc/go/gofrontend/parse.cc
@@ -4523,9 +4523,12 @@ Parse::expr_case_clause(Case_clauses* clauses, bool* saw_default)
   bool is_fallthrough = false;
   if (this->peek_token()->is_keyword(KEYWORD_FALLTHROUGH))
     {
+      Location fallthrough_loc = this->location();
       is_fallthrough = true;
       if (this->advance_token()->is_op(OPERATOR_SEMICOLON))
 	this->advance_token();
+      if (this->peek_token()->is_op(OPERATOR_RCURLY))
+	error_at(fallthrough_loc, _("cannot fallthrough final case in switch"));
     }
 
   if (is_default)