Hi,
On 01/03/2013 10:56 PM, Jason Merrill wrote:
On 01/03/2013 05:44 AM, Paolo Carlini wrote:
+ /* C++11 - 2.5 p3, bullet 2. */
Please flesh out this comment some more.
Ok, I extended it like this.
Thanks,
Paolo.
/////////////////////
Index: gcc/cp/parser.c
===================================================================
--- gcc/cp/parser.c (revision 194884)
+++ gcc/cp/parser.c (working copy)
@@ -1,6 +1,6 @@
/* C++ Parser.
Copyright (C) 2000, 2001, 2002, 2003, 2004,
- 2005, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+ 2005, 2007-2013 Free Software Foundation, Inc.
Written by Mark Mitchell <m...@codesourcery.com>.
This file is part of GCC.
@@ -12655,11 +12655,9 @@ cp_parser_template_id (cp_parser *parser,
return error_mark_node;
}
/* Otherwise, emit an error about the invalid digraph, but continue
- parsing because we got our argument list. In C++11 do not emit
- any error, per 2.5/3. */
- if (cxx_dialect < cxx0x
- && permerror (next_token->location,
- "%<<::%> cannot begin a template-argument list"))
+ parsing because we got our argument list. */
+ if (permerror (next_token->location,
+ "%<<::%> cannot begin a template-argument list"))
{
static bool hint = false;
inform (next_token->location,
Index: gcc/testsuite/g++.dg/cpp0x/parse2.C
===================================================================
--- gcc/testsuite/g++.dg/cpp0x/parse2.C (revision 194884)
+++ gcc/testsuite/g++.dg/cpp0x/parse2.C (working copy)
@@ -10,3 +10,6 @@ int main()
{
X<::A> x;
}
+
+int a;
+bool b = 0<::a;
Index: gcc/testsuite/g++.old-deja/g++.other/crash28.C
===================================================================
--- gcc/testsuite/g++.old-deja/g++.other/crash28.C (revision 194884)
+++ gcc/testsuite/g++.old-deja/g++.other/crash28.C (working copy)
@@ -31,5 +31,5 @@ class foo
};
void foo::x() throw(bar)
{
- if (!b) throw bar (static_cast<::N::X*>(this)); // { dg-error "lambda
expressions|expected" } parse error
+ if (!b) throw bar (static_cast<::N::X*>(this)); // { dg-error "lambda
expressions|expected|invalid" } parse error
}
Index: libcpp/lex.c
===================================================================
--- libcpp/lex.c (revision 194884)
+++ libcpp/lex.c (working copy)
@@ -1,6 +1,6 @@
/* CPP Library - lexical analysis.
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010,
- 2011, 2012 Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007-2013
+ Free Software Foundation, Inc.
Contributed by Per Bothner, 1994-95.
Based on CCCP program by Paul Rubin, June 1986
Adapted to ANSI C, Richard Stallman, Jan 1987
@@ -2290,6 +2290,17 @@ _cpp_lex_direct (cpp_reader *pfile)
{
if (*buffer->cur == ':')
{
+ /* C++11 [2.5/3 lex.pptoken], "Otherwise, if the next
+ three characters are <:: and the subsequent character
+ is neither : nor >, the < is treated as a preprocessor
+ token by itself". */
+ if (CPP_OPTION (pfile, cplusplus)
+ && (CPP_OPTION (pfile, lang) == CLK_CXX11
+ || CPP_OPTION (pfile, lang) == CLK_GNUCXX11)
+ && buffer->cur[1] == ':'
+ && buffer->cur[2] != ':' && buffer->cur[2] != '>')
+ break;
+
buffer->cur++;
result->flags |= DIGRAPH;
result->type = CPP_OPEN_SQUARE;
