[Bug preprocessor/103902] GCC requires a space between string-literal and identifier in a literal-operator-id where the identifier is not in basic character set

[thiago.bauermann at linaro dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103902

Thiago Jung Bauermann <thiago.bauermann at linaro dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |thiago.bauermann at linaro dot org

--- Comment #8 from Thiago Jung Bauermann <thiago.bauermann at linaro dot org> ---
Hello,

The new tests udlit-extended-id-1.C and udlit-extended-id-3.C are failing on
armv8l-linux-gnueabihf (tested on Ubuntu 22.04):

Running g++:g++.dg/dg.exp ...
FAIL: g++.dg/cpp0x/udlit-extended-id-1.C -std=c++14 (test for excess errors)
UNRESOLVED: g++.dg/cpp0x/udlit-extended-id-1.C -std=c++14 compilation failed to
produce executable
FAIL: g++.dg/cpp0x/udlit-extended-id-1.C -std=c++17 (test for excess errors)
UNRESOLVED: g++.dg/cpp0x/udlit-extended-id-1.C -std=c++17 compilation failed to
produce executable
FAIL: g++.dg/cpp0x/udlit-extended-id-1.C -std=c++20 (test for excess errors)
UNRESOLVED: g++.dg/cpp0x/udlit-extended-id-1.C -std=c++20 compilation failed to
produce executable
FAIL: g++.dg/cpp0x/udlit-extended-id-3.C -std=c++14 (test for excess errors)
FAIL: g++.dg/cpp0x/udlit-extended-id-3.C -std=c++17 (test for excess errors)
FAIL: g++.dg/cpp0x/udlit-extended-id-3.C -std=c++20 (test for excess errors)

Looking at g++.log, the errors are:

/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:24:14:
error: 'const char* operator""_1\U000003c3(const char*, long unsigned int)' has
invalid argument list
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:29:14:
error: 'const char* operator""_\U000003a32(const char*, long unsigned int)' has
invalid argument list
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:34:14:
error: 'const char* operator""_\U000000e61(const char*, long unsigned int)' has
invalid argument list
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:39:13:
error: 'const char* operator""_\U000001532(const char*, long unsigned int)' has
invalid argument list
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:
In function 'int main()':
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:56:15:
error: unable to find string literal operator 'operator""_1\U000003c3' with
'const char [4]', 'unsigned int' arguments
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:58:15:
error: unable to find string literal operator 'operator""_\U000003a32' with
'const char [5]', 'unsigned int' arguments
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:60:15:
error: unable to find string literal operator 'operator""_1\U000003c3' with
'const char [7]', 'unsigned int' arguments
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:62:15:
error: unable to find string literal operator 'operator""_1\U000003c3' with
'const char [8]', 'unsigned int' arguments
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:65:15:
error: unable to find string literal operator 'operator""_\U000003a32' with
'const char [7]', 'unsigned int' arguments
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:67:15:
error: unable to find string literal operator 'operator""_\U000000e61' with
'const char [4]', 'unsigned int' arguments
/home/thiago.bauermann/src/gcc/gcc/testsuite/g++.dg/cpp0x/udlit-extended-id-1.C:69:15:
error: unable to find string literal operator 'operator""_\U000001532' with
'const char [4]', 'unsigned int' arguments
compiler exited with status 1

Any idea what could be going wrong? They do pass on aarch64-linux, so I wonder
if this is a 32-bit issue?