Re: [PATCH] libcpp, v4: Add -Winvalid-utf8 warning [PR106655]

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From: Jason Merrill <jason@redhat.com>
To: Jakub Jelinek <jakub@redhat.com>
Cc: gcc-patches@gcc.gnu.org
Subject: Re: [PATCH] libcpp, v4: Add -Winvalid-utf8 warning [PR106655]
Date: Wed, 31 Aug 2022 10:24:42 -0400	[thread overview]
Message-ID: <83bad971-48f1-9f79-3521-839bad9fd77f@redhat.com> (raw)
In-Reply-To: <Yw9tG7Ybl7Dtcd67@tucnak>

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On 8/31/22 10:15, Jakub Jelinek wrote:
> On Wed, Aug 31, 2022 at 09:55:29AM -0400, Jason Merrill wrote:
>> On 8/31/22 07:14, Jakub Jelinek wrote:
>>> On Tue, Aug 30, 2022 at 05:51:26PM -0400, Jason Merrill wrote:
>>>> This hunk now seems worth factoring out of the four places it occurs.
>>>>
>>>> It also seems the comment for _cpp_valid_utf8 needs to be updated: it
>>>> currently says it's not called when parsing a string.
>>>
>>> Ok, so like this?
>>
>> OK, thanks.
> 
> Actually, it isn't enough to diagnose this in comments and character/string
> literals, sorry for finding that out only today.
> 
> We don't accept invalid UTF-8 in identifiers, it fails the checking in there
> (most of the times without errors), what we do is create CPP_OTHER tokens
> out of those and then typically diagnose it when it is used somewhere.
> Except it doesn't have to be used anywhere, it can be omitted.
> 
> So if we have say
> #define I(x)
> I(ï¿½ï¿½ï¿½)
> like in the Winvalid-utf8-3.c test, we silently accept it.
> 
> This updated version extends the diagnostics even to those cases.
> I can't use _cpp_handle_multibyte_utf8 in that case because it needs
> different treatment (no bidi stuff which is emitted already from
> forms_identifier_p etc.).
> 
> Tested so far on the new tests, ok for trunk if it passes full
> bootstrap/regtest?

OK.

> 2022-08-31  Jakub Jelinek  <jakub@redhat.com>
> 
> 	PR c++/106655
> libcpp/
> 	* include/cpplib.h (struct cpp_options): Implement C++23
> 	P2295R6 - Support for UTF-8 as a portable source file encoding.
> 	Add cpp_warn_invalid_utf8 and cpp_input_charset_explicit fields.
> 	(enum cpp_warning_reason): Add CPP_W_INVALID_UTF8 enumerator.
> 	* init.cc (cpp_create_reader): Initialize cpp_warn_invalid_utf8
> 	and cpp_input_charset_explicit.
> 	* charset.cc (_cpp_valid_utf8): Adjust function comment.
> 	* lex.cc (UCS_LIMIT): Define.
> 	(utf8_continuation): New const variable.
> 	(utf8_signifier): Move earlier in the file.
> 	(_cpp_warn_invalid_utf8, _cpp_handle_multibyte_utf8): New functions.
> 	(_cpp_skip_block_comment): Handle -Winvalid-utf8 warning.
> 	(skip_line_comment): Likewise.
> 	(lex_raw_string, lex_string): Likewise.
> 	(_cpp_lex_direct): Likewise.
> gcc/
> 	* doc/invoke.texi (-Winvalid-utf8): Document it.
> gcc/c-family/
> 	* c.opt (-Winvalid-utf8): New warning.
> 	* c-opts.c (c_common_handle_option) <case OPT_finput_charset_>:
> 	Set cpp_opts->cpp_input_charset_explicit.
> 	(c_common_post_options): If -finput-charset=UTF-8 is explicit
> 	in C++23, enable -Winvalid-utf8 by default and if -pedantic
> 	or -pedantic-errors, make it a pedwarn.
> gcc/testsuite/
> 	* c-c++-common/cpp/Winvalid-utf8-1.c: New test.
> 	* c-c++-common/cpp/Winvalid-utf8-2.c: New test.
> 	* c-c++-common/cpp/Winvalid-utf8-3.c: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-1.C: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-2.C: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-3.C: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-4.C: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-5.C: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-6.C: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-7.C: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-8.C: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-9.C: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-10.C: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-11.C: New test.
> 	* g++.dg/cpp23/Winvalid-utf8-12.C: New test.
> 
> --- libcpp/include/cpplib.h.jj	2022-08-31 10:19:45.226452609 +0200
> +++ libcpp/include/cpplib.h	2022-08-31 12:25:42.451125755 +0200
> @@ -560,6 +560,13 @@ struct cpp_options
>        cpp_bidirectional_level.  */
>     unsigned char cpp_warn_bidirectional;
>   
> +  /* True if libcpp should warn about invalid UTF-8 characters in comments.
> +     2 if it should be a pedwarn.  */
> +  unsigned char cpp_warn_invalid_utf8;
> +
> +  /* True if -finput-charset= option has been used explicitly.  */
> +  bool cpp_input_charset_explicit;
> +
>     /* Dependency generation.  */
>     struct
>     {
> @@ -666,7 +673,8 @@ enum cpp_warning_reason {
>     CPP_W_CXX11_COMPAT,
>     CPP_W_CXX20_COMPAT,
>     CPP_W_EXPANSION_TO_DEFINED,
> -  CPP_W_BIDIRECTIONAL
> +  CPP_W_BIDIRECTIONAL,
> +  CPP_W_INVALID_UTF8
>   };
>   
>   /* Callback for header lookup for HEADER, which is the name of a
> --- libcpp/init.cc.jj	2022-08-31 10:19:45.260452148 +0200
> +++ libcpp/init.cc	2022-08-31 12:25:42.451125755 +0200
> @@ -227,6 +227,8 @@ cpp_create_reader (enum c_lang lang, cpp
>     CPP_OPTION (pfile, ext_numeric_literals) = 1;
>     CPP_OPTION (pfile, warn_date_time) = 0;
>     CPP_OPTION (pfile, cpp_warn_bidirectional) = bidirectional_unpaired;
> +  CPP_OPTION (pfile, cpp_warn_invalid_utf8) = 0;
> +  CPP_OPTION (pfile, cpp_input_charset_explicit) = 0;
>   
>     /* Default CPP arithmetic to something sensible for the host for the
>        benefit of dumb users like fix-header.  */
> --- libcpp/charset.cc.jj	2022-08-26 16:06:10.578493272 +0200
> +++ libcpp/charset.cc	2022-08-31 12:34:18.921176118 +0200
> @@ -1742,9 +1742,9 @@ convert_ucn (cpp_reader *pfile, const uc
>       case, no diagnostic is emitted, and the return value of FALSE should cause
>       a new token to be formed.
>   
> -    Unlike _cpp_valid_ucn, this will never be called when lexing a string; only
> -    a potential identifier, or a CPP_OTHER token.  NST is unused in the latter
> -    case.
> +    _cpp_valid_utf8 can be called when lexing a potential identifier, or a
> +    CPP_OTHER token or for the purposes of -Winvalid-utf8 warning in string or
> +    character literals.  NST is unused when not in a potential identifier.
>   
>       As in _cpp_valid_ucn, IDENTIFIER_POS is 0 when not in an identifier, 1 for
>       the start of an identifier, or 2 otherwise.  */
> --- libcpp/lex.cc.jj	2022-08-31 10:19:45.327451236 +0200
> +++ libcpp/lex.cc	2022-08-31 15:23:53.753556178 +0200
> @@ -50,6 +50,9 @@ static const struct token_spelling token
>   #define TOKEN_SPELL(token) (token_spellings[(token)->type].category)
>   #define TOKEN_NAME(token) (token_spellings[(token)->type].name)
>   
> +/* ISO 10646 defines the UCS codespace as the range 0-0x10FFFF inclusive.  */
> +#define UCS_LIMIT 0x10FFFF
> +
>   static void add_line_note (cpp_buffer *, const uchar *, unsigned int);
>   static int skip_line_comment (cpp_reader *);
>   static void skip_whitespace (cpp_reader *, cppchar_t);
> @@ -1704,6 +1707,120 @@ maybe_warn_bidi_on_char (cpp_reader *pfi
>     bidi::on_char (kind, ucn_p, loc);
>   }
>   
> +static const cppchar_t utf8_continuation = 0x80;
> +static const cppchar_t utf8_signifier = 0xC0;
> +
> +/* Emit -Winvalid-utf8 warning on invalid UTF-8 character starting
> +   at PFILE->buffer->cur.  Return a pointer after the diagnosed
> +   invalid character.  */
> +
> +static const uchar *
> +_cpp_warn_invalid_utf8 (cpp_reader *pfile)
> +{
> +  cpp_buffer *buffer = pfile->buffer;
> +  const uchar *cur = buffer->cur;
> +  bool pedantic = (CPP_PEDANTIC (pfile)
> +		   && CPP_OPTION (pfile, cpp_warn_invalid_utf8) == 2);
> +
> +  if (cur[0] < utf8_signifier
> +      || cur[1] < utf8_continuation || cur[1] >= utf8_signifier)
> +    {
> +      if (pedantic)
> +	cpp_error_with_line (pfile, CPP_DL_PEDWARN,
> +			     pfile->line_table->highest_line,
> +			     CPP_BUF_COL (buffer),
> +			     "invalid UTF-8 character <%x>",
> +			     cur[0]);
> +      else
> +	cpp_warning_with_line (pfile, CPP_W_INVALID_UTF8,
> +			       pfile->line_table->highest_line,
> +			       CPP_BUF_COL (buffer),
> +			       "invalid UTF-8 character <%x>",
> +			       cur[0]);
> +      return cur + 1;
> +    }
> +  else if (cur[2] < utf8_continuation || cur[2] >= utf8_signifier)
> +    {
> +      if (pedantic)
> +	cpp_error_with_line (pfile, CPP_DL_PEDWARN,
> +			     pfile->line_table->highest_line,
> +			     CPP_BUF_COL (buffer),
> +			     "invalid UTF-8 character <%x><%x>",
> +			     cur[0], cur[1]);
> +      else
> +	cpp_warning_with_line (pfile, CPP_W_INVALID_UTF8,
> +			       pfile->line_table->highest_line,
> +			       CPP_BUF_COL (buffer),
> +			       "invalid UTF-8 character <%x><%x>",
> +			       cur[0], cur[1]);
> +      return cur + 2;
> +    }
> +  else if (cur[3] < utf8_continuation || cur[3] >= utf8_signifier)
> +    {
> +      if (pedantic)
> +	cpp_error_with_line (pfile, CPP_DL_PEDWARN,
> +			     pfile->line_table->highest_line,
> +			     CPP_BUF_COL (buffer),
> +			     "invalid UTF-8 character <%x><%x><%x>",
> +			     cur[0], cur[1], cur[2]);
> +      else
> +	cpp_warning_with_line (pfile, CPP_W_INVALID_UTF8,
> +			       pfile->line_table->highest_line,
> +			       CPP_BUF_COL (buffer),
> +			       "invalid UTF-8 character <%x><%x><%x>",
> +			       cur[0], cur[1], cur[2]);
> +      return cur + 3;
> +    }
> +  else
> +    {
> +      if (pedantic)
> +	cpp_error_with_line (pfile, CPP_DL_PEDWARN,
> +			     pfile->line_table->highest_line,
> +			     CPP_BUF_COL (buffer),
> +			     "invalid UTF-8 character <%x><%x><%x><%x>",
> +			     cur[0], cur[1], cur[2], cur[3]);
> +      else
> +	cpp_warning_with_line (pfile, CPP_W_INVALID_UTF8,
> +			       pfile->line_table->highest_line,
> +			       CPP_BUF_COL (buffer),
> +			       "invalid UTF-8 character <%x><%x><%x><%x>",
> +			       cur[0], cur[1], cur[2], cur[3]);
> +      return cur + 4;
> +    }
> +}
> +
> +/* Helper function of *skip_*_comment and lex*_string.  For C,
> +   character at CUR[-1] with MSB set handle -Wbidi-chars* and
> +   -Winvalid-utf8 diagnostics and return pointer to first character
> +   that should be processed next.  */
> +
> +static inline const uchar *
> +_cpp_handle_multibyte_utf8 (cpp_reader *pfile, uchar c,
> +			    const uchar *cur, bool warn_bidi_p,
> +			    bool warn_invalid_utf8_p)
> +{
> +  /* If this is a beginning of a UTF-8 encoding, it might be
> +     a bidirectional control character.  */
> +  if (c == bidi::utf8_start && warn_bidi_p)
> +    {
> +      location_t loc;
> +      bidi::kind kind = get_bidi_utf8 (pfile, cur - 1, &loc);
> +      maybe_warn_bidi_on_char (pfile, kind, /*ucn_p=*/false, loc);
> +    }
> +  if (!warn_invalid_utf8_p)
> +    return cur;
> +  if (c >= utf8_signifier)
> +    {
> +      cppchar_t s;
> +      const uchar *pstr = cur - 1;
> +      if (_cpp_valid_utf8 (pfile, &pstr, pfile->buffer->rlimit, 0, NULL, &s)
> +	  && s <= UCS_LIMIT)
> +	return pstr;
> +    }
> +  pfile->buffer->cur = cur - 1;
> +  return _cpp_warn_invalid_utf8 (pfile);
> +}
> +
>   /* Skip a C-style block comment.  We find the end of the comment by
>      seeing if an asterisk is before every '/' we encounter.  Returns
>      nonzero if comment terminated by EOF, zero otherwise.
> @@ -1716,6 +1833,8 @@ _cpp_skip_block_comment (cpp_reader *pfi
>     const uchar *cur = buffer->cur;
>     uchar c;
>     const bool warn_bidi_p = pfile->warn_bidi_p ();
> +  const bool warn_invalid_utf8_p = CPP_OPTION (pfile, cpp_warn_invalid_utf8);
> +  const bool warn_bidi_or_invalid_utf8_p = warn_bidi_p | warn_invalid_utf8_p;
>   
>     cur++;
>     if (*cur == '/')
> @@ -1765,14 +1884,10 @@ _cpp_skip_block_comment (cpp_reader *pfi
>   
>   	  cur = buffer->cur;
>   	}
> -      /* If this is a beginning of a UTF-8 encoding, it might be
> -	 a bidirectional control character.  */
> -      else if (__builtin_expect (c == bidi::utf8_start, 0) && warn_bidi_p)
> -	{
> -	  location_t loc;
> -	  bidi::kind kind = get_bidi_utf8 (pfile, cur - 1, &loc);
> -	  maybe_warn_bidi_on_char (pfile, kind, /*ucn_p=*/false, loc);
> -	}
> +      else if (__builtin_expect (c >= utf8_continuation, 0)
> +	       && warn_bidi_or_invalid_utf8_p)
> +	cur = _cpp_handle_multibyte_utf8 (pfile, c, cur, warn_bidi_p,
> +					  warn_invalid_utf8_p);
>       }
>   
>     buffer->cur = cur;
> @@ -1789,11 +1904,13 @@ skip_line_comment (cpp_reader *pfile)
>     cpp_buffer *buffer = pfile->buffer;
>     location_t orig_line = pfile->line_table->highest_line;
>     const bool warn_bidi_p = pfile->warn_bidi_p ();
> +  const bool warn_invalid_utf8_p = CPP_OPTION (pfile, cpp_warn_invalid_utf8);
> +  const bool warn_bidi_or_invalid_utf8_p = warn_bidi_p | warn_invalid_utf8_p;
>   
> -  if (!warn_bidi_p)
> +  if (!warn_bidi_or_invalid_utf8_p)
>       while (*buffer->cur != '\n')
>         buffer->cur++;
> -  else
> +  else if (!warn_invalid_utf8_p)
>       {
>         while (*buffer->cur != '\n'
>   	     && *buffer->cur != bidi::utf8_start)
> @@ -1813,6 +1930,22 @@ skip_line_comment (cpp_reader *pfile)
>   	  maybe_warn_bidi_on_close (pfile, buffer->cur);
>   	}
>       }
> +  else
> +    {
> +      while (*buffer->cur != '\n')
> +	{
> +	  if (*buffer->cur < utf8_continuation)
> +	    {
> +	      buffer->cur++;
> +	      continue;
> +	    }
> +	  buffer->cur
> +	    = _cpp_handle_multibyte_utf8 (pfile, *buffer->cur, buffer->cur + 1,
> +					  warn_bidi_p, warn_invalid_utf8_p);
> +	}
> +      if (warn_bidi_p)
> +	maybe_warn_bidi_on_close (pfile, buffer->cur);
> +    }
>   
>     _cpp_process_line_notes (pfile, true);
>     return orig_line != pfile->line_table->highest_line;
> @@ -1919,8 +2052,6 @@ warn_about_normalization (cpp_reader *pf
>       }
>   }
>   
> -static const cppchar_t utf8_signifier = 0xC0;
> -
>   /* Returns TRUE if the sequence starting at buffer->cur is valid in
>      an identifier.  FIRST is TRUE if this starts an identifier.  */
>   
> @@ -2361,6 +2492,8 @@ lex_raw_string (cpp_reader *pfile, cpp_t
>   {
>     const uchar *pos = base;
>     const bool warn_bidi_p = pfile->warn_bidi_p ();
> +  const bool warn_invalid_utf8_p = CPP_OPTION (pfile, cpp_warn_invalid_utf8);
> +  const bool warn_bidi_or_invalid_utf8_p = warn_bidi_p | warn_invalid_utf8_p;
>   
>     /* 'tis a pity this information isn't passed down from the lexer's
>        initial categorization of the token.  */
> @@ -2597,13 +2730,10 @@ lex_raw_string (cpp_reader *pfile, cpp_t
>   	  pos = base = pfile->buffer->cur;
>   	  note = &pfile->buffer->notes[pfile->buffer->cur_note];
>   	}
> -      else if (__builtin_expect ((unsigned char) c == bidi::utf8_start, 0)
> -	       && warn_bidi_p)
> -	{
> -	  location_t loc;
> -	  bidi::kind kind = get_bidi_utf8 (pfile, pos - 1, &loc);
> -	  maybe_warn_bidi_on_char (pfile, kind, /*ucn_p=*/false, loc);
> -	}
> +      else if (__builtin_expect ((unsigned char) c >= utf8_continuation, 0)
> +	       && warn_bidi_or_invalid_utf8_p)
> +	pos = _cpp_handle_multibyte_utf8 (pfile, c, pos, warn_bidi_p,
> +					  warn_invalid_utf8_p);
>       }
>   
>     if (warn_bidi_p)
> @@ -2704,6 +2834,8 @@ lex_string (cpp_reader *pfile, cpp_token
>       terminator = '>', type = CPP_HEADER_NAME;
>   
>     const bool warn_bidi_p = pfile->warn_bidi_p ();
> +  const bool warn_invalid_utf8_p = CPP_OPTION (pfile, cpp_warn_invalid_utf8);
> +  const bool warn_bidi_or_invalid_utf8_p = warn_bidi_p | warn_invalid_utf8_p;
>     for (;;)
>       {
>         cppchar_t c = *cur++;
> @@ -2745,12 +2877,10 @@ lex_string (cpp_reader *pfile, cpp_token
>   	}
>         else if (c == '\0')
>   	saw_NUL = true;
> -      else if (__builtin_expect (c == bidi::utf8_start, 0) && warn_bidi_p)
> -	{
> -	  location_t loc;
> -	  bidi::kind kind = get_bidi_utf8 (pfile, cur - 1, &loc);
> -	  maybe_warn_bidi_on_char (pfile, kind, /*ucn_p=*/false, loc);
> -	}
> +      else if (__builtin_expect (c >= utf8_continuation, 0)
> +	       && warn_bidi_or_invalid_utf8_p)
> +	cur = _cpp_handle_multibyte_utf8 (pfile, c, cur, warn_bidi_p,
> +					  warn_invalid_utf8_p);
>       }
>   
>     if (saw_NUL && !pfile->state.skipping)
> @@ -4052,6 +4182,7 @@ _cpp_lex_direct (cpp_reader *pfile)
>       default:
>         {
>   	const uchar *base = --buffer->cur;
> +	static int no_warn_cnt;
>   
>   	/* Check for an extended identifier ($ or UCN or UTF-8).  */
>   	struct normalize_state nst = INITIAL_NORMALIZE_STATE;
> @@ -4072,7 +4203,33 @@ _cpp_lex_direct (cpp_reader *pfile)
>   	    const uchar *pstr = base;
>   	    cppchar_t s;
>   	    if (_cpp_valid_utf8 (pfile, &pstr, buffer->rlimit, 0, NULL, &s))
> -	      buffer->cur = pstr;
> +	      {
> +		if (s > UCS_LIMIT && CPP_OPTION (pfile, cpp_warn_invalid_utf8))
> +		  {
> +		    buffer->cur = base;
> +		    _cpp_warn_invalid_utf8 (pfile);
> +		  }
> +		buffer->cur = pstr;
> +	      }
> +	    else if (CPP_OPTION (pfile, cpp_warn_invalid_utf8))
> +	      {
> +		buffer->cur = base;
> +		const uchar *end = _cpp_warn_invalid_utf8 (pfile);
> +		buffer->cur = base + 1;
> +		no_warn_cnt = end - buffer->cur;
> +	      }
> +	  }
> +	else if (c >= utf8_continuation
> +		 && CPP_OPTION (pfile, cpp_warn_invalid_utf8))
> +	  {
> +	    if (no_warn_cnt)
> +	      --no_warn_cnt;
> +	    else
> +	      {
> +		buffer->cur = base;
> +		_cpp_warn_invalid_utf8 (pfile);
> +		buffer->cur = base + 1;
> +	      }
>   	  }
>   	create_literal (pfile, result, base, buffer->cur - base, CPP_OTHER);
>   	break;
> --- gcc/doc/invoke.texi.jj	2022-08-31 10:20:20.224976860 +0200
> +++ gcc/doc/invoke.texi	2022-08-31 14:58:17.654138549 +0200
> @@ -365,9 +365,9 @@ Objective-C and Objective-C++ Dialects}.
>   -Winfinite-recursion @gol
>   -Winit-self  -Winline  -Wno-int-conversion  -Wint-in-bool-context @gol
>   -Wno-int-to-pointer-cast  -Wno-invalid-memory-model @gol
> --Winvalid-pch  -Wjump-misses-init  -Wlarger-than=@var{byte-size} @gol
> --Wlogical-not-parentheses  -Wlogical-op  -Wlong-long @gol
> --Wno-lto-type-mismatch -Wmain  -Wmaybe-uninitialized @gol
> +-Winvalid-pch  -Winvalid-utf8 -Wjump-misses-init  @gol
> +-Wlarger-than=@var{byte-size}  -Wlogical-not-parentheses  -Wlogical-op  @gol
> +-Wlong-long  -Wno-lto-type-mismatch -Wmain  -Wmaybe-uninitialized @gol
>   -Wmemset-elt-size  -Wmemset-transposed-args @gol
>   -Wmisleading-indentation  -Wmissing-attributes  -Wmissing-braces @gol
>   -Wmissing-field-initializers  -Wmissing-format-attribute @gol
> @@ -9569,6 +9569,13 @@ different size.
>   Warn if a precompiled header (@pxref{Precompiled Headers}) is found in
>   the search path but cannot be used.
>   
> +@item -Winvalid-utf8
> +@opindex Winvalid-utf8
> +@opindex Wno-invalid-utf8
> +Warn if an invalid UTF-8 character is found.
> +This warning is on by default for C++23 if @option{-finput-charset=UTF-8}
> +is used and turned into error with @option{-pedantic-errors}.
> +
>   @item -Wlong-long
>   @opindex Wlong-long
>   @opindex Wno-long-long
> --- gcc/c-family/c.opt.jj	2022-08-31 10:19:45.145453711 +0200
> +++ gcc/c-family/c.opt	2022-08-31 12:25:42.457125674 +0200
> @@ -821,6 +821,10 @@ Winvalid-pch
>   C ObjC C++ ObjC++ CPP(warn_invalid_pch) CppReason(CPP_W_INVALID_PCH) Var(cpp_warn_invalid_pch) Init(0) Warning
>   Warn about PCH files that are found but not used.
>   
> +Winvalid-utf8
> +C objC C++ ObjC++ CPP(cpp_warn_invalid_utf8) CppReason(CPP_W_INVALID_UTF8) Var(warn_invalid_utf8) Init(0) Warning
> +Warn about invalid UTF-8 characters in comments.
> +
>   Wjump-misses-init
>   C ObjC Var(warn_jump_misses_init) Warning LangEnabledby(C ObjC,Wc++-compat)
>   Warn when a jump misses a variable initialization.
> --- gcc/c-family/c-opts.cc.jj	2022-08-31 10:19:45.080454594 +0200
> +++ gcc/c-family/c-opts.cc	2022-08-31 12:25:42.457125674 +0200
> @@ -534,6 +534,7 @@ c_common_handle_option (size_t scode, co
>   
>       case OPT_finput_charset_:
>         cpp_opts->input_charset = arg;
> +      cpp_opts->cpp_input_charset_explicit = 1;
>         break;
>   
>       case OPT_ftemplate_depth_:
> @@ -1152,6 +1153,17 @@ c_common_post_options (const char **pfil
>       lang_hooks.preprocess_options (parse_in);
>     cpp_post_options (parse_in);
>     init_global_opts_from_cpp (&global_options, cpp_get_options (parse_in));
> +  /* For C++23 and explicit -finput-charset=UTF-8, turn on -Winvalid-utf8
> +     by default and make it a pedwarn unless -Wno-invalid-utf8.  */
> +  if (cxx_dialect >= cxx23
> +      && cpp_opts->cpp_input_charset_explicit
> +      && strcmp (cpp_opts->input_charset, "UTF-8") == 0
> +      && (cpp_opts->cpp_warn_invalid_utf8
> +	  || !global_options_set.x_warn_invalid_utf8))
> +    {
> +      global_options.x_warn_invalid_utf8 = 1;
> +      cpp_opts->cpp_warn_invalid_utf8 = cpp_opts->cpp_pedantic ? 2 : 1;
> +    }
>   
>     /* Let diagnostics infrastructure know how to convert input files the same
>        way libcpp will do it, namely using the configured input charset and
> --- gcc/testsuite/c-c++-common/cpp/Winvalid-utf8-1.c.jj	2022-08-31 12:25:42.458125660 +0200
> +++ gcc/testsuite/c-c++-common/cpp/Winvalid-utf8-1.c	2022-08-31 14:58:28.977986756 +0200
> @@ -0,0 +1,43 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess }
> +// { dg-options "-finput-charset=UTF-8 -Winvalid-utf8" }
> +
> +// aÂ€ß¿à €íŸ¿î€€ð€€ô¿¿a		{ dg-bogus "invalid UTF-8 character" }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <80>" }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <bf>" }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <c0>" }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <c1>" }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <f5>" }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <ff>" }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <c2>" }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <e0>" }
> +// aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><80><bf>" }
> +// aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><9f><80>" }
> +// aï¿½ï¿½a					{ dg-warning "invalid UTF-8 character <e0><bf>" }
> +// aï¿½ï¿½a					{ dg-warning "invalid UTF-8 character <ec><80>" }
> +// aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <ed><a0><80>" }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><80><80><80>" }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f4><90><80><80>" }
> +// aï¿½ï¿½ï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" }
> +//					{ dg-warning "invalid UTF-8 character <bf>" "" { target *-*-* } .-1 }
> +/* aÂ€ß¿à €íŸ¿î€€ð€€ô¿¿a		{ dg-bogus "invalid UTF-8 character" } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <80>" } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <bf>" } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <c0>" } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <c1>" } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <f5>" } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <ff>" } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <c2>" } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <e0>" } */
> +/* aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><80><bf>" } */
> +/* aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><9f><80>" } */
> +/* aï¿½ï¿½a					{ dg-warning "invalid UTF-8 character <e0><bf>" } */
> +/* aï¿½ï¿½a					{ dg-warning "invalid UTF-8 character <ec><80>" } */
> +/* aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <ed><a0><80>" } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><80><80><80>" } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f4><90><80><80>" } */
> +/* aï¿½ï¿½ï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" } */
> +/*					{ dg-warning "invalid UTF-8 character <bf>" "" { target *-*-* } .-1 } */
> --- gcc/testsuite/c-c++-common/cpp/Winvalid-utf8-2.c.jj	2022-08-31 12:25:42.458125660 +0200
> +++ gcc/testsuite/c-c++-common/cpp/Winvalid-utf8-2.c	2022-08-31 14:58:38.091864588 +0200
> @@ -0,0 +1,88 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess { target { c || c++11 } } }
> +// { dg-require-effective-target wchar }
> +// { dg-options "-finput-charset=UTF-8 -Winvalid-utf8" }
> +// { dg-additional-options "-std=gnu99" { target c } }
> +
> +#ifndef __cplusplus
> +#include <wchar.h>
> +typedef __CHAR16_TYPE__ char16_t;
> +typedef __CHAR32_TYPE__ char32_t;
> +#endif
> +
> +char32_t a = U'ï¿½';				// { dg-warning "invalid UTF-8 character <80>" }
> +char32_t b = U'ï¿½';				// { dg-warning "invalid UTF-8 character <bf>" }
> +char32_t c = U'ï¿½';				// { dg-warning "invalid UTF-8 character <c0>" }
> +char32_t d = U'ï¿½';				// { dg-warning "invalid UTF-8 character <c1>" }
> +char32_t e = U'ï¿½';				// { dg-warning "invalid UTF-8 character <f5>" }
> +char32_t f = U'ï¿½';				// { dg-warning "invalid UTF-8 character <ff>" }
> +char32_t g = U'ï¿½';				// { dg-warning "invalid UTF-8 character <c2>" }
> +char32_t h = U'ï¿½';				// { dg-warning "invalid UTF-8 character <e0>" }
> +char32_t i = U'ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <e0><80><bf>" }
> +char32_t j = U'ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <e0><9f><80>" }
> +char32_t k = U'ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <e0><bf>" }
> +char32_t l = U'ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <ec><80>" }
> +char32_t m = U'ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <ed><a0><80>" }
> +char32_t n = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" }
> +char32_t o = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" }
> +char32_t p = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <f4><90><80><80>" }
> +char32_t q = U'ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target *-*-* } .-1 }
> +const char32_t *A = U"Â€ß¿à €íŸ¿î€€ð€€ô¿¿";	// { dg-bogus "invalid UTF-8 character" }
> +const char32_t *B = U"ï¿½";			// { dg-warning "invalid UTF-8 character <80>" }
> +const char32_t *C = U"ï¿½";			// { dg-warning "invalid UTF-8 character <bf>" }
> +const char32_t *D = U"ï¿½";			// { dg-warning "invalid UTF-8 character <c0>" }
> +const char32_t *E = U"ï¿½";			// { dg-warning "invalid UTF-8 character <c1>" }
> +const char32_t *F = U"ï¿½";			// { dg-warning "invalid UTF-8 character <f5>" }
> +const char32_t *G = U"ï¿½";			// { dg-warning "invalid UTF-8 character <ff>" }
> +const char32_t *H = U"ï¿½";			// { dg-warning "invalid UTF-8 character <c2>" }
> +const char32_t *I = U"ï¿½";			// { dg-warning "invalid UTF-8 character <e0>" }
> +const char32_t *J = U"ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <e0><80><bf>" }
> +const char32_t *K = U"ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <e0><9f><80>" }
> +const char32_t *L = U"ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <e0><bf>" }
> +const char32_t *M = U"ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <ec><80>" }
> +const char32_t *N = U"ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <ed><a0><80>" }
> +const char32_t *O = U"ï¿½ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <f0><80><80><80>" }
> +const char32_t *P = U"ï¿½ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" }
> +const char32_t *Q = U"ï¿½ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <f4><90><80><80>" }
> +const char32_t *R = U"ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target *-*-* } .-1 }
> +const char32_t *A1 = UR"(Â€ß¿à €íŸ¿î€€ð€€ô¿¿)"; // { dg-bogus "invalid UTF-8 character" }
> +const char32_t *B1 = UR"(ï¿½)";			// { dg-warning "invalid UTF-8 character <80>" }
> +const char32_t *C1 = UR"(ï¿½)";			// { dg-warning "invalid UTF-8 character <bf>" }
> +const char32_t *D1 = UR"(ï¿½)";			// { dg-warning "invalid UTF-8 character <c0>" }
> +const char32_t *E1 = UR"(ï¿½)";			// { dg-warning "invalid UTF-8 character <c1>" }
> +const char32_t *F1 = UR"(ï¿½)";			// { dg-warning "invalid UTF-8 character <f5>" }
> +const char32_t *G1 = UR"(ï¿½)";			// { dg-warning "invalid UTF-8 character <ff>" }
> +const char32_t *H1 = UR"(ï¿½)";			// { dg-warning "invalid UTF-8 character <c2>" }
> +const char32_t *I1 = UR"(ï¿½)";			// { dg-warning "invalid UTF-8 character <e0>" }
> +const char32_t *J1 = UR"(ï¿½ï¿½ï¿½)";			// { dg-warning "invalid UTF-8 character <e0><80><bf>" }
> +const char32_t *K1 = UR"(ï¿½ï¿½ï¿½)";			// { dg-warning "invalid UTF-8 character <e0><9f><80>" }
> +const char32_t *L1 = UR"(ï¿½ï¿½)";			// { dg-warning "invalid UTF-8 character <e0><bf>" }
> +const char32_t *M1 = UR"(ï¿½ï¿½)";			// { dg-warning "invalid UTF-8 character <ec><80>" }
> +const char32_t *N1 = UR"(ï¿½ï¿½ï¿½)";			// { dg-warning "invalid UTF-8 character <ed><a0><80>" }
> +const char32_t *O1 = UR"(ï¿½ï¿½ï¿½ï¿½)";		// { dg-warning "invalid UTF-8 character <f0><80><80><80>" }
> +const char32_t *P1 = UR"(ï¿½ï¿½ï¿½ï¿½)";		// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" }
> +const char32_t *Q1 = UR"(ï¿½ï¿½ï¿½ï¿½)";		// { dg-warning "invalid UTF-8 character <f4><90><80><80>" }
> +const char32_t *R1 = UR"(ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½)";		// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target *-*-* } .-1 }
> +const char *A2 = u8"Â€ß¿à €íŸ¿î€€ð€€ô¿¿";	// { dg-bogus "invalid UTF-8 character" }
> +const char *B2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <80>" }
> +const char *C2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <bf>" }
> +const char *D2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <c0>" }
> +const char *E2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <c1>" }
> +const char *F2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <f5>" }
> +const char *G2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <ff>" }
> +const char *H2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <c2>" }
> +const char *I2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <e0>" }
> +const char *J2 = u8"ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <e0><80><bf>" }
> +const char *K2 = u8"ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <e0><9f><80>" }
> +const char *L2 = u8"ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <e0><bf>" }
> +const char *M2 = u8"ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <ec><80>" }
> +const char *N2 = u8"ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <ed><a0><80>" }
> +const char *O2 = u8"ï¿½ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <f0><80><80><80>" }
> +const char *P2 = u8"ï¿½ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" }
> +const char *Q2 = u8"ï¿½ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <f4><90><80><80>" }
> +const char *R2 = u8"ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½";			// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target *-*-* } .-1 }
> --- gcc/testsuite/c-c++-common/cpp/Winvalid-utf8-3.c.jj	2022-08-31 13:15:18.456085432 +0200
> +++ gcc/testsuite/c-c++-common/cpp/Winvalid-utf8-3.c	2022-08-31 15:55:45.469984253 +0200
> @@ -0,0 +1,27 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess }
> +// { dg-options "-finput-charset=UTF-8 -Winvalid-utf8" }
> +
> +#define I(x)
> +I(Â€ß¿à €íŸ¿î€€ð€€ô¿¿)	// { dg-bogus "invalid UTF-8 character" }
> +                                // { dg-error "is not valid in an identifier" "" { target c++ } .-1 }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <80>" }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <bf>" }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <c0>" }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <c1>" }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <f5>" }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <ff>" }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <c2>" }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <e0>" }
> +I(ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <e0><80><bf>" }
> +I(ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <e0><9f><80>" }
> +I(ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <e0><bf>" }
> +I(ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <ec><80>" }
> +I(ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <ed><a0><80>" }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c } }
> +                                // { dg-error "is not valid in an identifier" "" { target c++ } .-1 }
> +I(ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½)			// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c } }
> +                                // { dg-error "is not valid in an identifier" "" { target c++ } .-1 }
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-1.C.jj	2022-08-31 12:25:42.458125660 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-1.C	2022-08-31 14:59:22.296272041 +0200
> @@ -0,0 +1,43 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess }
> +// { dg-options "-finput-charset=UTF-8" }
> +
> +// aÂ€ß¿à €íŸ¿î€€ð€€ô¿¿a		{ dg-bogus "invalid UTF-8 character" }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +// aï¿½ï¿½a					{ dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +// aï¿½ï¿½a					{ dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +//					{ dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +/* aÂ€ß¿à €íŸ¿î€€ð€€ô¿¿a		{ dg-bogus "invalid UTF-8 character" } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <80>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } } */
> +/* a?ï¿½a					{ dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } } */
> +/* aï¿½ï¿½a					{ dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } } */
> +/*					{ dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 } */
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-2.C.jj	2022-08-31 12:25:42.458125660 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-2.C	2022-08-31 14:59:27.314204777 +0200
> @@ -0,0 +1,43 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess }
> +// { dg-options "-finput-charset=UTF-8 -pedantic" }
> +
> +// aÂ€ß¿à €íŸ¿î€€ð€€ô¿¿a		{ dg-bogus "invalid UTF-8 character" }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +// a?a					{ dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +// aï¿½a					{ dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +// aï¿½ï¿½a					{ dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +// aï¿½ï¿½a					{ dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +//					{ dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +/* aÂ€ß¿à €íŸ¿î€€ð€€ô¿¿a		{ dg-bogus "invalid UTF-8 character" } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <80>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½a					{ dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } } */
> +/* aï¿½ï¿½a					{ dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½ï¿½ï¿½a				{ dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } } */
> +/*					{ dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 } */
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-3.C.jj	2022-08-31 12:25:42.458125660 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-3.C	2022-08-31 14:59:33.624120194 +0200
> @@ -0,0 +1,43 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess }
> +// { dg-options "-finput-charset=UTF-8 -pedantic-errors" }
> +
> +// aÂ€ß¿à €íŸ¿î€€ð€€ô¿¿a		{ dg-bogus "invalid UTF-8 character" }
> +// aï¿½a					{ dg-error "invalid UTF-8 character <80>" "" { target c++23 } }
> +// aï¿½a					{ dg-error "invalid UTF-8 character <bf>" "" { target c++23 } }
> +// aï¿½a					{ dg-error "invalid UTF-8 character <c0>" "" { target c++23 } }
> +// aï¿½a					{ dg-error "invalid UTF-8 character <c1>" "" { target c++23 } }
> +// aï¿½a					{ dg-error "invalid UTF-8 character <f5>" "" { target c++23 } }
> +// aï¿½a					{ dg-error "invalid UTF-8 character <ff>" "" { target c++23 } }
> +// aï¿½a					{ dg-error "invalid UTF-8 character <c2>" "" { target c++23 } }
> +// aï¿½a					{ dg-error "invalid UTF-8 character <e0>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +// aï¿½ï¿½a					{ dg-error "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +// aï¿½ï¿½a					{ dg-error "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +// aï¿½ï¿½ï¿½ï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +//					{ dg-error "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +/* aÂ€ß¿à €íŸ¿î€€ð€€ô¿¿a		{ dg-bogus "invalid UTF-8 character" } */
> +/* aï¿½a					{ dg-error "invalid UTF-8 character <80>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-error "invalid UTF-8 character <bf>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-error "invalid UTF-8 character <c0>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-error "invalid UTF-8 character <c1>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-error "invalid UTF-8 character <f5>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-error "invalid UTF-8 character <ff>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-error "invalid UTF-8 character <c2>" "" { target c++23 } } */
> +/* aï¿½a					{ dg-error "invalid UTF-8 character <e0>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½a					{ dg-error "invalid UTF-8 character <e0><bf>" "" { target c++23 } } */
> +/* aï¿½ï¿½a					{ dg-error "invalid UTF-8 character <ec><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } } */
> +/* aï¿½ï¿½ï¿½ï¿½ï¿½ï¿½a				{ dg-error "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } } */
> +/*					{ dg-error "invalid UTF-8 character <bf>" "" { target c++23 } .-1 } */
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-4.C.jj	2022-08-31 12:25:42.458125660 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-4.C	2022-08-31 14:59:37.965062005 +0200
> @@ -0,0 +1,43 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess }
> +// { dg-options "-finput-charset=UTF-8 -pedantic-errors -Wno-invalid-utf8" }
> +
> +// aÂ€ß¿à €íŸ¿î€€ð€€ô¿¿a		{ dg-bogus "invalid UTF-8 character" }
> +// aï¿½a					{ dg-bogus "invalid UTF-8 character <80>" }
> +// aï¿½a					{ dg-bogus "invalid UTF-8 character <bf>" }
> +// aï¿½a					{ dg-bogus "invalid UTF-8 character <c0>" }
> +// aï¿½a					{ dg-bogus "invalid UTF-8 character <c1>" }
> +// aï¿½a					{ dg-bogus "invalid UTF-8 character <f5>" }
> +// aï¿½a					{ dg-bogus "invalid UTF-8 character <ff>" }
> +// aï¿½a					{ dg-bogus "invalid UTF-8 character <c2>" }
> +// aï¿½a					{ dg-bogus "invalid UTF-8 character <e0>" }
> +// aï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <e0><80><bf>" }
> +// aï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <e0><9f><80>" }
> +// aï¿½ï¿½a					{ dg-bogus "invalid UTF-8 character <e0><bf>" }
> +// aï¿½ï¿½a					{ dg-bogus "invalid UTF-8 character <ec><80>" }
> +// aï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <ed><a0><80>" }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <f0><80><80><80>" }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <f0><8f><bf><bf>" }
> +// aï¿½ï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <f4><90><80><80>" }
> +// aï¿½ï¿½ï¿½ï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <fd><bf><bf><bf>" }
> +//					{ dg-bogus "invalid UTF-8 character <bf>" "" { target *-*-* } .-1 }
> +/* aÂ€ß¿à €íŸ¿î€€ð€€ô¿¿a		{ dg-bogus "invalid UTF-8 character" } */
> +/* aï¿½a					{ dg-bogus "invalid UTF-8 character <80>" } */
> +/* aï¿½a					{ dg-bogus "invalid UTF-8 character <bf>" } */
> +/* aï¿½a					{ dg-bogus "invalid UTF-8 character <c0>" } */
> +/* aï¿½a					{ dg-bogus "invalid UTF-8 character <c1>" } */
> +/* aï¿½a					{ dg-bogus "invalid UTF-8 character <f5>" } */
> +/* aï¿½a					{ dg-bogus "invalid UTF-8 character <ff>" } */
> +/* aï¿½a					{ dg-bogus "invalid UTF-8 character <c2>" } */
> +/* aï¿½a					{ dg-bogus "invalid UTF-8 character <e0>" } */
> +/* aï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <e0><80><bf>" } */
> +/* aï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <e0><9f><80>" } */
> +/* aï¿½ï¿½a					{ dg-bogus "invalid UTF-8 character <e0><bf>" } */
> +/* aï¿½ï¿½a					{ dg-bogus "invalid UTF-8 character <ec><80>" } */
> +/* aï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <ed><a0><80>" } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <f0><80><80><80>" } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <f0><8f><bf><bf>" } */
> +/* aï¿½ï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <f4><90><80><80>" } */
> +/* aï¿½ï¿½ï¿½ï¿½ï¿½ï¿½a				{ dg-bogus "invalid UTF-8 character <fd><bf><bf><bf>" } */
> +/*					{ dg-bogus "invalid UTF-8 character <bf>" "" { target *-*-* } .-1 } */
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-5.C.jj	2022-08-31 12:25:42.458125660 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-5.C	2022-08-31 14:59:49.089912880 +0200
> @@ -0,0 +1,80 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess { target c++11 } }
> +// { dg-options "-finput-charset=UTF-8" }
> +
> +char32_t a = U'?';				// { dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +char32_t b = U'ï¿½';				// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +char32_t c = U'ï¿½';				// { dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +char32_t d = U'ï¿½';				// { dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +char32_t e = U'ï¿½';				// { dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +char32_t f = U'ï¿½';				// { dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +char32_t g = U'ï¿½';				// { dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +char32_t h = U'ï¿½';				// { dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +char32_t i = U'ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +char32_t j = U'ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +char32_t k = U'ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +char32_t l = U'ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +char32_t m = U'ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +char32_t n = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +char32_t o = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +char32_t p = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +char32_t q = U'ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A = U"Â€ß¿à €íŸ¿î€€ð€€ô¿¿";		// { dg-bogus "invalid UTF-8 character" }
> +auto B = U"ï¿½";					// { dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C = U"ï¿½";					// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D = U"ï¿½";					// { dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E = U"ï¿½";					// { dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F = U"ï¿½";					// { dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G = U"ï¿½";					// { dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H = U"ï¿½";					// { dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I = U"ï¿½";					// { dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J = U"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K = U"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L = U"ï¿½ï¿½";					// { dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M = U"ï¿½ï¿½";					// { dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N = U"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R = U"ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A1 = UR"(Â€ß¿à €íŸ¿î€€ð€€ô¿¿)";		// { dg-bogus "invalid UTF-8 character" }
> +auto B1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L1 = UR"(ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M1 = UR"(ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R1 = UR"(ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A2 = u8"Â€ß¿à €íŸ¿î€€ð€€ô¿¿";		// { dg-bogus "invalid UTF-8 character" }
> +auto B2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J2 = u8"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K2 = u8"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L2 = u8"ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M2 = u8"ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N2 = u8"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R2 = u8"ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-6.C.jj	2022-08-31 12:25:42.458125660 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-6.C	2022-08-31 14:59:58.128791717 +0200
> @@ -0,0 +1,80 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess { target c++11 } }
> +// { dg-options "-finput-charset=UTF-8 -pedantic" }
> +
> +char32_t a = U'ï¿½';				// { dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +char32_t b = U'ï¿½';				// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +char32_t c = U'ï¿½';				// { dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +char32_t d = U'ï¿½';				// { dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +char32_t e = U'ï¿½';				// { dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +char32_t f = U'ï¿½';				// { dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +char32_t g = U'ï¿½';				// { dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +char32_t h = U'ï¿½';				// { dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +char32_t i = U'ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +char32_t j = U'ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +char32_t k = U'ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +char32_t l = U'ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +char32_t m = U'ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +char32_t n = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +char32_t o = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +char32_t p = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +char32_t q = U'ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½';				// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A = U"Â€ß¿à €íŸ¿î€€ð€€ô¿¿";		// { dg-bogus "invalid UTF-8 character" }
> +auto B = U"ï¿½";					// { dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C = U"ï¿½";					// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D = U"ï¿½";					// { dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E = U"ï¿½";					// { dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F = U"ï¿½";					// { dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G = U"ï¿½";					// { dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H = U"ï¿½";					// { dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I = U"ï¿½";					// { dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J = U"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K = U"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L = U"ï¿½ï¿½";					// { dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M = U"ï¿½ï¿½";					// { dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N = U"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R = U"ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A1 = UR"(Â€ß¿à €íŸ¿î€€ð€€ô¿¿)";		// { dg-bogus "invalid UTF-8 character" }
> +auto B1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I1 = UR"(ï¿½)";				// { dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L1 = UR"(ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M1 = UR"(??)";				// { dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R1 = UR"(ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½)";				// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A2 = u8"Â€ß¿à €íŸ¿î€€ð€€ô¿¿";		// { dg-bogus "invalid UTF-8 character" }
> +auto B2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I2 = u8"ï¿½";				// { dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J2 = u8"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K2 = u8"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L2 = u8"ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M2 = u8"ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N2 = u8"ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R2 = u8"ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½";				// { dg-warning "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-7.C.jj	2022-08-31 12:25:42.459125647 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-7.C	2022-08-31 15:00:05.749689562 +0200
> @@ -0,0 +1,80 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess { target c++11 } }
> +// { dg-options "-finput-charset=UTF-8 -pedantic-errors" }
> +
> +char32_t a = U'ï¿½';				// { dg-error "invalid UTF-8 character <80>" "" { target c++23 } }
> +char32_t b = U'ï¿½';				// { dg-error "invalid UTF-8 character <bf>" "" { target c++23 } }
> +char32_t c = U'ï¿½';				// { dg-error "invalid UTF-8 character <c0>" "" { target c++23 } }
> +char32_t d = U'ï¿½';				// { dg-error "invalid UTF-8 character <c1>" "" { target c++23 } }
> +char32_t e = U'ï¿½';				// { dg-error "invalid UTF-8 character <f5>" "" { target c++23 } }
> +char32_t f = U'ï¿½';				// { dg-error "invalid UTF-8 character <ff>" "" { target c++23 } }
> +char32_t g = U'ï¿½';				// { dg-error "invalid UTF-8 character <c2>" "" { target c++23 } }
> +char32_t h = U'ï¿½';				// { dg-error "invalid UTF-8 character <e0>" "" { target c++23 } }
> +char32_t i = U'ï¿½ï¿½ï¿½';				// { dg-error "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +char32_t j = U'ï¿½ï¿½ï¿½';				// { dg-error "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +char32_t k = U'ï¿½ï¿½';				// { dg-error "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +char32_t l = U'ï¿½ï¿½';				// { dg-error "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +char32_t m = U'ï¿½ï¿½ï¿½';				// { dg-error "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +char32_t n = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-error "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +char32_t o = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-error "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +char32_t p = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-error "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +char32_t q = U'ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½';				// { dg-error "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-error "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A = U"Â€ß¿à €íŸ¿î€€ð€€ô¿¿";		// { dg-bogus "invalid UTF-8 character" }
> +auto B = U"ï¿½";					// { dg-error "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C = U"ï¿½";					// { dg-error "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D = U"ï¿½";					// { dg-error "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E = U"ï¿½";					// { dg-error "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F = U"ï¿½";					// { dg-error "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G = U"ï¿½";					// { dg-error "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H = U"ï¿½";					// { dg-error "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I = U"ï¿½";					// { dg-error "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J = U"ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K = U"ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L = U"ï¿½ï¿½";					// { dg-error "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M = U"ï¿½ï¿½";					// { dg-error "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N = U"ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R = U"ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-error "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A1 = UR"(Â€ß¿à €íŸ¿î€€ð€€ô¿¿)";		// { dg-bogus "invalid UTF-8 character" }
> +auto B1 = UR"(ï¿½)";				// { dg-error "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C1 = UR"(ï¿½)";				// { dg-error "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D1 = UR"(ï¿½)";				// { dg-error "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E1 = UR"(ï¿½)";				// { dg-error "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F1 = UR"(ï¿½)";				// { dg-error "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G1 = UR"(ï¿½)";				// { dg-error "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H1 = UR"(ï¿½)";				// { dg-error "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I1 = UR"(ï¿½)";				// { dg-error "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-error "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-error "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L1 = UR"(ï¿½ï¿½)";				// { dg-error "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M1 = UR"(ï¿½ï¿½)";				// { dg-error "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-error "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-error "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-error "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-error "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R1 = UR"(ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½)";				// { dg-error "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-error "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A2 = u8"Â€ß¿à €íŸ¿î€€ð€€ô¿¿";		// { dg-bogus "invalid UTF-8 character" }
> +auto B2 = u8"ï¿½";				// { dg-error "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C2 = u8"ï¿½";				// { dg-error "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D2 = u8"ï¿½";				// { dg-error "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E2 = u8"ï¿½";				// { dg-error "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F2 = u8"ï¿½";				// { dg-error "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G2 = u8"ï¿½";				// { dg-error "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H2 = u8"ï¿½";				// { dg-error "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I2 = u8"ï¿½";				// { dg-error "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J2 = u8"ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K2 = u8"ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L2 = u8"ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M2 = u8"ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N2 = u8"ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R2 = u8"ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½";				// { dg-error "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-error "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-8.C.jj	2022-08-31 12:25:42.459125647 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-8.C	2022-08-31 15:00:11.378614108 +0200
> @@ -0,0 +1,80 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess { target c++11 } }
> +// { dg-options "-finput-charset=UTF-8 -pedantic-errors -Wno-invalid-utf8" }
> +
> +char32_t a = U'ï¿½';				// { dg-bogus "invalid UTF-8 character <80>" "" { target c++23 } }
> +char32_t b = U'ï¿½';				// { dg-bogus "invalid UTF-8 character <bf>" "" { target c++23 } }
> +char32_t c = U'ï¿½';				// { dg-bogus "invalid UTF-8 character <c0>" "" { target c++23 } }
> +char32_t d = U'ï¿½';				// { dg-bogus "invalid UTF-8 character <c1>" "" { target c++23 } }
> +char32_t e = U'ï¿½';				// { dg-bogus "invalid UTF-8 character <f5>" "" { target c++23 } }
> +char32_t f = U'ï¿½';				// { dg-bogus "invalid UTF-8 character <ff>" "" { target c++23 } }
> +char32_t g = U'ï¿½';				// { dg-bogus "invalid UTF-8 character <c2>" "" { target c++23 } }
> +char32_t h = U'ï¿½';				// { dg-bogus "invalid UTF-8 character <e0>" "" { target c++23 } }
> +char32_t i = U'ï¿½ï¿½ï¿½';				// { dg-bogus "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +char32_t j = U'ï¿½ï¿½ï¿½';				// { dg-bogus "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +char32_t k = U'ï¿½ï¿½';				// { dg-bogus "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +char32_t l = U'ï¿½ï¿½';				// { dg-bogus "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +char32_t m = U'ï¿½ï¿½ï¿½';				// { dg-bogus "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +char32_t n = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-bogus "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +char32_t o = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-bogus "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +char32_t p = U'ï¿½ï¿½ï¿½ï¿½';				// { dg-bogus "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +char32_t q = U'ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½';				// { dg-bogus "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-bogus "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A = U"Â€ß¿à €íŸ¿î€€ð€€ô¿¿";		// { dg-bogus "invalid UTF-8 character" }
> +auto B = U"ï¿½";					// { dg-bogus "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C = U"ï¿½";					// { dg-bogus "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D = U"ï¿½";					// { dg-bogus "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E = U"ï¿½";					// { dg-bogus "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F = U"ï¿½";					// { dg-bogus "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G = U"ï¿½";					// { dg-bogus "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H = U"ï¿½";					// { dg-bogus "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I = U"ï¿½";					// { dg-bogus "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J = U"ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K = U"ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L = U"ï¿½ï¿½";					// { dg-bogus "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M = U"ï¿½ï¿½";					// { dg-bogus "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N = U"ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q = U"ï¿½ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R = U"ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-bogus "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A1 = UR"(Â€ß¿à €íŸ¿î€€ð€€ô¿¿)";		// { dg-bogus "invalid UTF-8 character" }
> +auto B1 = UR"(ï¿½)";				// { dg-bogus "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C1 = UR"(ï¿½)";				// { dg-bogus "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D1 = UR"(ï¿½)";				// { dg-bogus "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E1 = UR"(ï¿½)";				// { dg-bogus "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F1 = UR"(ï¿½)";				// { dg-bogus "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G1 = UR"(ï¿½)";				// { dg-bogus "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H1 = UR"(ï¿½)";				// { dg-bogus "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I1 = UR"(ï¿½)";				// { dg-bogus "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-bogus "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-bogus "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L1 = UR"(ï¿½ï¿½)";				// { dg-bogus "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M1 = UR"(ï¿½ï¿½)";				// { dg-bogus "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N1 = UR"(ï¿½ï¿½ï¿½)";				// { dg-bogus "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-bogus "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-bogus "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q1 = UR"(ï¿½ï¿½ï¿½ï¿½)";				// { dg-bogus "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R1 = UR"(ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½)";				// { dg-bogus "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-bogus "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> +auto A2 = u8"Â€ß¿à €íŸ¿î€€ð€€ô¿¿";		// { dg-bogus "invalid UTF-8 character" }
> +auto B2 = u8"ï¿½";				// { dg-bogus "invalid UTF-8 character <80>" "" { target c++23 } }
> +auto C2 = u8"ï¿½";				// { dg-bogus "invalid UTF-8 character <bf>" "" { target c++23 } }
> +auto D2 = u8"ï¿½";				// { dg-bogus "invalid UTF-8 character <c0>" "" { target c++23 } }
> +auto E2 = u8"ï¿½";				// { dg-bogus "invalid UTF-8 character <c1>" "" { target c++23 } }
> +auto F2 = u8"ï¿½";				// { dg-bogus "invalid UTF-8 character <f5>" "" { target c++23 } }
> +auto G2 = u8"ï¿½";				// { dg-bogus "invalid UTF-8 character <ff>" "" { target c++23 } }
> +auto H2 = u8"ï¿½";				// { dg-bogus "invalid UTF-8 character <c2>" "" { target c++23 } }
> +auto I2 = u8"ï¿½";				// { dg-bogus "invalid UTF-8 character <e0>" "" { target c++23 } }
> +auto J2 = u8"ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +auto K2 = u8"ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +auto L2 = u8"ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +auto M2 = u8"ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +auto N2 = u8"ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +auto O2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +auto P2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +auto Q2 = u8"ï¿½ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <f4><90><80><80>" "" { target c++23 } }
> +auto R2 = u8"ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½";				// { dg-bogus "invalid UTF-8 character <fd><bf><bf><bf>" "" { target c++23 } }
> +						// { dg-bogus "invalid UTF-8 character <bf>" "" { target c++23 } .-1 }
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-9.C.jj	2022-08-31 15:56:45.801177822 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-9.C	2022-08-31 15:57:42.281422873 +0200
> @@ -0,0 +1,25 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess }
> +// { dg-options "-finput-charset=UTF-8" }
> +
> +#define I(x)
> +I(Â€ß¿à €íŸ¿î€€ð€€ô¿¿)	// { dg-bogus "invalid UTF-8 character" }
> +                                // { dg-error "is not valid in an identifier" "" { target *-*-* } .-1 }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +I(ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +I(ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-error "is not valid in an identifier" }
> +I(ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½)			// { dg-error "is not valid in an identifier" }
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-10.C.jj	2022-08-31 15:58:04.029132184 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-10.C	2022-08-31 15:58:09.934053256 +0200
> @@ -0,0 +1,25 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess }
> +// { dg-options "-finput-charset=UTF-8 -pedantic" }
> +
> +#define I(x)
> +I(Â€ß¿à €íŸ¿î€€ð€€ô¿¿)	// { dg-bogus "invalid UTF-8 character" }
> +                                // { dg-error "is not valid in an identifier" "" { target *-*-* } .-1 }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <80>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <bf>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <c0>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <c1>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <f5>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <ff>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <c2>" "" { target c++23 } }
> +I(ï¿½)				// { dg-warning "invalid UTF-8 character <e0>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +I(ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +I(ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-warning "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-error "is not valid in an identifier" }
> +I(ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½)			// { dg-error "is not valid in an identifier" }
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-11.C.jj	2022-08-31 15:58:18.825934408 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-11.C	2022-08-31 15:58:30.929772616 +0200
> @@ -0,0 +1,25 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess }
> +// { dg-options "-finput-charset=UTF-8 -pedantic-errors" }
> +
> +#define I(x)
> +I(Â€ß¿à €íŸ¿î€€ð€€ô¿¿)	// { dg-bogus "invalid UTF-8 character" }
> +                                // { dg-error "is not valid in an identifier" "" { target *-*-* } .-1 }
> +I(ï¿½)				// { dg-error "invalid UTF-8 character <80>" "" { target c++23 } }
> +I(ï¿½)				// { dg-error "invalid UTF-8 character <bf>" "" { target c++23 } }
> +I(ï¿½)				// { dg-error "invalid UTF-8 character <c0>" "" { target c++23 } }
> +I(ï¿½)				// { dg-error "invalid UTF-8 character <c1>" "" { target c++23 } }
> +I(ï¿½)				// { dg-error "invalid UTF-8 character <f5>" "" { target c++23 } }
> +I(ï¿½)				// { dg-error "invalid UTF-8 character <ff>" "" { target c++23 } }
> +I(ï¿½)				// { dg-error "invalid UTF-8 character <c2>" "" { target c++23 } }
> +I(ï¿½)				// { dg-error "invalid UTF-8 character <e0>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½)				// { dg-error "invalid UTF-8 character <e0><80><bf>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½)				// { dg-error "invalid UTF-8 character <e0><9f><80>" "" { target c++23 } }
> +I(ï¿½ï¿½)				// { dg-error "invalid UTF-8 character <e0><bf>" "" { target c++23 } }
> +I(ï¿½ï¿½)				// { dg-error "invalid UTF-8 character <ec><80>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½)				// { dg-error "invalid UTF-8 character <ed><a0><80>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-error "invalid UTF-8 character <f0><80><80><80>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-error "invalid UTF-8 character <f0><8f><bf><bf>" "" { target c++23 } }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-error "is not valid in an identifier" }
> +I(ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½)			// { dg-error "is not valid in an identifier" }
> --- gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-12.C.jj	2022-08-31 15:58:52.404485572 +0200
> +++ gcc/testsuite/g++.dg/cpp23/Winvalid-utf8-12.C	2022-08-31 15:59:19.735120251 +0200
> @@ -0,0 +1,25 @@
> +// P2295R6 - Support for UTF-8 as a portable source file encoding
> +// This test intentionally contains various byte sequences which are not valid UTF-8
> +// { dg-do preprocess }
> +// { dg-options "-finput-charset=UTF-8 -pedantic-errors -Wno-invalid-utf8" }
> +
> +#define I(x)
> +I(Â€ß¿à €íŸ¿î€€ð€€ô¿¿)	// { dg-bogus "invalid UTF-8 character" }
> +                                // { dg-error "is not valid in an identifier" "" { target *-*-* } .-1 }
> +I(ï¿½)				// { dg-bogus "invalid UTF-8 character <80>" }
> +I(ï¿½)				// { dg-bogus "invalid UTF-8 character <bf>" }
> +I(ï¿½)				// { dg-bogus "invalid UTF-8 character <c0>" }
> +I(ï¿½)				// { dg-bogus "invalid UTF-8 character <c1>" }
> +I(ï¿½)				// { dg-bogus "invalid UTF-8 character <f5>" }
> +I(ï¿½)				// { dg-bogus "invalid UTF-8 character <ff>" }
> +I(ï¿½)				// { dg-bogus "invalid UTF-8 character <c2>" }
> +I(ï¿½)				// { dg-bogus "invalid UTF-8 character <e0>" }
> +I(ï¿½ï¿½ï¿½)				// { dg-bogus "invalid UTF-8 character <e0><80><bf>" }
> +I(ï¿½ï¿½ï¿½)				// { dg-bogus "invalid UTF-8 character <e0><9f><80>" }
> +I(ï¿½ï¿½)				// { dg-bogus "invalid UTF-8 character <e0><bf>" }
> +I(?ï¿½)				// { dg-bogus "invalid UTF-8 character <ec><80>" }
> +I(ï¿½ï¿½ï¿½)				// { dg-bogus "invalid UTF-8 character <ed><a0><80>" }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-bogus "invalid UTF-8 character <f0><80><80><80>" }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-bogus "invalid UTF-8 character <f0><8f><bf><bf>" }
> +I(ï¿½ï¿½ï¿½ï¿½)				// { dg-error "is not valid in an identifier" }
> +I(ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½)			// { dg-error "is not valid in an identifier" }
> 
> 
> 	Jakub
>

     prev parent reply	other threads:[~2022-08-31 14:24 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-29  8:15 [PATCH] libcpp: " Jakub Jelinek
2022-08-29 21:15 ` Jason Merrill
2022-08-29 21:35   ` Jakub Jelinek
2022-08-29 21:54     ` Jakub Jelinek
2022-08-30  3:31     ` Jason Merrill
2022-08-30 15:20       ` [PATCH] libcpp, v2: " Jakub Jelinek
2022-08-30 21:51         ` Jason Merrill
2022-08-31 11:14           ` [PATCH] libcpp, v3: " Jakub Jelinek
2022-08-31 13:55             ` Jason Merrill
2022-08-31 14:15               ` [PATCH] libcpp, v4: " Jakub Jelinek
2022-08-31 14:24                 ` Jason Merrill [this message]

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