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compiler: Permit label on fallthrough statement. 

Test case: https://go-review.googlesource.com/7523 .

From-SVN: r221428
This commit is contained in:
Ian Lance Taylor 2015-03-13 20:48:15 +00:00
parent f41914c385
commit cbf259c447
1 changed files with 11 additions and 0 deletions
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11
gcc/go/gofrontend/parse.cc
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@ -3735,6 +3735,17 @@ Parse::labeled_stmt(const std::string& label_name, Location location)
if (!this->statement_may_start_here()) if (!this->statement_may_start_here())
{ {
if (this->peek_token()->is_keyword(KEYWORD_FALLTHROUGH))
{
// We don't treat the fallthrough keyword as a statement,
// because it can't appear most places where a statement is
// permitted, but it may have a label. We introduce a
// semicolon because the caller expects to see a statement.
this->unget_token(Token::make_operator_token(OPERATOR_SEMICOLON,
location));
return;
}
// Mark the label as used to avoid a useless error about an // Mark the label as used to avoid a useless error about an
// unused label. // unused label.
if (label != NULL) if (label != NULL)