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Corentin Jabot 304e974694 [Clang] Correctly handle $, @, and ` when represented as UCN 
This covers
 * P2558R2 (C++, wg21.link/P2558)
 * N2701 (C, https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2701.htm)
 * N3124 (C, https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3124.pdf)

This patch
 * Disallow representing $ as a UCN in all language mode, which did not
   properly work (see GH62133), and which in made ill-formed in
   C++ and C by P2558 and N3124 respectively
 * Allow a UCN for any character in C2X, in string and character
   literals

Fixes #62133

Reviewed By: #clang-language-wg, tahonermann

Differential Revision: https://reviews.llvm.org/D153621
2023-07-12 08:03:23 +02:00
..
Inputs
When we run out of source locations, try to produce useful information
2022-11-16 14:36:16 -08:00
11-27-2007-FloatLiterals.c
…
aligned-allocation.cpp
…
asm-preproc-no-unicode.s
…
badstring_in_if0.c
…
bcpl-escaped-newline.c
…
bitint-constants-compat.c
Implement literal suffixes for _BitInt
2022-03-14 09:24:19 -04:00
bitint-constants.c
[X86][clang] Lift _BitInt() supported max width.
2022-12-06 11:02:27 +08:00
block_cmt_end.c
Remove rdar links; NFC
2023-07-07 08:41:11 -04:00
builtin_redef.c
[Lex] Warn when defining or undefining any builtin macro
2023-05-25 11:55:44 +01:00
c2x_digit_separators.c
…
c90.c
Revert "Pedantically warn about // comments in gnu89 mode"
2022-05-05 18:39:13 -04:00
case-insensitive-include-ms.c
…
case-insensitive-include-pr31836.sh
…
case-insensitive-include-win.c
…
case-insensitive-include.c
…
case-insensitive-system-include.c
…
char8_t.cpp
…
char-escapes-delimited.c
[clang] Use -std=c++23 instead of -std=c++2b
2023-05-04 19:19:52 +02:00
char-escapes.c
[clang][Interp] Implement String- and CharacterLiterals
2022-10-28 15:05:21 +02:00
char-literal-encoding-error.c
…
char-literal.cpp
[Clang] Correctly handle $, @, and ` when represented as UCN
2023-07-12 08:03:23 +02:00
comment-escape.c
Remove rdar links; NFC
2023-07-07 08:41:11 -04:00
comment-invalid-utf8.c
[Clang] Add a warning on invalid UTF-8 in comments.
2022-07-13 10:19:26 +02:00
comment-utf8.c
[Clang] Add a warning on invalid UTF-8 in comments.
2022-07-13 10:19:26 +02:00
conflict-marker.c
…
constants.c
Remove rdar links; NFC
2023-07-07 08:41:11 -04:00
coroutines.cpp
[Coroutines] Remove -fcoroutines-ts
2023-02-23 14:40:58 +08:00
counter.c
Remove rdar links; NFC
2023-07-07 08:41:11 -04:00
cross-windows-on-linux-default.cpp
…
cross-windows-on-linux.cpp
…
cxx0x_keyword_as_cxx98.cpp
…
cxx0x_raw_string_delim_length.cpp
…
cxx0x_raw_string_directives.cpp
…
cxx0x_raw_string_unterminated.cpp
…
cxx1y_binary_literal.cpp
…
cxx1y_digit_separators.cpp
…
cxx1z-trigraphs.cpp
[clang][sema] Print more information about failed static assertions
2022-08-11 08:44:38 +02:00
cxx2a_keyword_as_cxx17.cpp
…
cxx2a-spaceship.cpp
…
cxx-features.cpp
[Clang] Implement P2738R1 - constexpr cast from void*
2023-06-26 16:45:07 +02:00
deprecate-macro.c
Warn if using elifdef & elifndef in not C2x & C++2b mode
2022-05-12 09:26:44 -04:00
digraph.c
…
dollar-idents.c
…
eof-char.c
…
eof-conflict-marker.c
…
eof-file.c
…
eof-include.c
…
eof-number.c
…
eof-string.c
…
escape_newline.c
…
final-macro.c
…
gnu-flags.c
…
half-literal.cpp
…
has_attribute_objc_boxable.m
…
has_extension_cxx.cpp
[clang] Add __has_extension () for C++11 features
2023-07-03 10:15:40 -04:00
has_extension.c
[C] Support _Generic expressions with a type operand
2023-06-05 11:09:58 -04:00
has_feature_address_sanitizer.cpp
…
has_feature_boxed_nsvalue_expressions.m
…
has_feature_c1x.c
…
has_feature_coverage_sanitizer.cpp
…
has_feature_cxx0x.cpp
…
has_feature_cxx_abi_relative_vtable.cpp
…
has_feature_exceptions.cpp
…
has_feature_experimental_library.cpp
[clang] Add a new flag -fexperimental-library to enable experimental library features
2022-07-19 15:04:58 -04:00
has_feature_leak_sanitizer.cpp
…
has_feature_memory_sanitizer.cpp
…
has_feature_memtag.cpp
Reland "[MTE] Add -fsanitize=memtag* and friends."
2022-04-08 14:28:33 -07:00
has_feature_modules.m
…
has_feature_objc_arc.m
…
has_feature_rtti.cpp
…
has_feature_speculative_load_hardening.cpp
…
has_feature_thread_sanitizer.cpp
…
has_feature_type_traits.cpp
…
has_feature_undefined_behavior_sanitizer.cpp
…
has_feature_xray_instrument.cpp
…
has_feature.cu
[CUDA][HIP] support __noinline__ as keyword
2022-05-10 14:32:27 -04:00
header.cpp
[clang] Show line numbers in diagnostic code snippets
2023-05-31 07:26:03 +02:00
hexfloat.cpp
…
keywords_test.c
[C2x] implement typeof and typeof_unqual
2022-09-28 13:27:52 -04:00
keywords_test.cpp
Diagnosing the Future Keywords
2022-08-26 09:20:05 -04:00
long-long.cpp
…
minimize_source_to_dependency_directives_at_import_extra_tokens.m
…
minimize_source_to_dependency_directives_at_import_missing_semi.m
…
minimize_source_to_dependency_directives_include.c
…
minimize_source_to_dependency_directives_invalid_error.c
…
minimize_source_to_dependency_directives_invalid_macro_name.c
[Tooling/DependencyScanning & Preprocessor] Refactor dependency scanning to produce pre-lexed preprocessor directive tokens, instead of minimized sources
2022-05-26 12:50:06 -07:00
minimize_source_to_dependency_directives_pragmas.c
[Tooling/DependencyScanning & Preprocessor] Refactor dependency scanning to produce pre-lexed preprocessor directive tokens, instead of minimized sources
2022-05-26 12:50:06 -07:00
minimize_source_to_dependency_directives_utf8bom.c
…
ms-compatibility.c
…
ms-extensions.c
Remove rdar links; NFC
2023-07-07 08:41:11 -04:00
ms-extensions.cpp
…
msdos-cpm-eof.c
…
multi-char-constants.c
…
multiple-include.c
…
newline-eof-c++98-compat.cpp
…
newline-eof.c
Remove rdar links; NFC
2023-07-07 08:41:11 -04:00
newline-nul.c
…
null-character-in-literal.c
Improve handling of static assert messages.
2022-06-29 14:57:35 +02:00
numeric-literal-trash.c
…
objc_macros.m
…
opencl-half-literal.cl
…
pedantic-macro-interplay.c
…
pragma-mark.c
…
pragma-message2.c
…
pragma-message.c
…
pragma-operators.cpp
Remove rdar links; NFC
2023-07-07 08:41:11 -04:00
pragma-region.c
…
preamble2.c
…
preamble.c
…
rdar-8914293.c
Remove rdar links; NFC
2023-07-07 08:41:11 -04:00
rdr-6096838-2.c
Remove rdar links; NFC
2023-07-07 08:41:11 -04:00
rdr-6096838.c
Remove rdar links; NFC
2023-07-07 08:41:11 -04:00
size_t-literal.cpp
[clang] Use -std=c++23 instead of -std=c++2b
2023-05-04 19:19:52 +02:00
SourceLocationsOverflow.c
When we run out of source locations, try to produce useful information
2022-11-16 14:36:16 -08:00
string_concat.cpp
…
string-literal-encoding.c
…
string-literal-errors.cpp
[clang] Show line numbers in diagnostic code snippets
2023-05-31 07:26:03 +02:00
token-concat.c
…
token-concat.cpp
…
unicode-strings.c
…
unicode.c
[Clang] Allow additional mathematical symbols in identifiers.
2022-12-16 10:20:49 +01:00
unknown-char.c
…
unsafe-macro.c
…
update_consecutive_macro_address_space.c
[Lex] Bring back the magic number 50 in updateConsecutiveMacroArgTokens.
2022-10-26 12:03:21 +02:00
update_consecutive_macro_crash.cpp
[Lex] Fix a crash in updateConsecutiveMacroArgTokens.
2023-02-22 10:16:02 +01:00
utf8-char-literal.cpp
[Clang] Correctly handle $, @, and ` when represented as UCN
2023-07-12 08:03:23 +02:00
utf8-invalid.c
…
utf-16.c
Remove rdar links; NFC
2023-07-07 08:41:11 -04:00
utf-16.c.txt
…
warn_binary_literals.cpp
…
warn-date-time.c
…
wchar-signedness.c
…
wchar.c
…