From: bc@freeuk.com
On 22/11/2025 17:13, Bonita Montero wrote:
> You can compile the code with -mavx512bw.
> This is "inline.h":
But I now get, from:
g++ =std=c++23 -mavx512bw -O2 c.cpp
the errors shown below. I tried -fconcepts too.
So, what also do I need? (So far you're not selling C++ very well!)
---------------------------------
c.cpp:33:54: warning: use of C++23 'make_signed_t' integer constant
33 | if( (*it & 0xC0) == 0x80 || width > min( 4Z, rem )
) [[unlikely]]
| ^~
c.cpp:24:5: error: 'requires' does not name a type
24 | requires std::same_as ||
std::same_as
| ^~~~~~~~
c.cpp:24:5: note: 'requires' only available with '-std=c++20' or
'-fconcepts'
c.cpp: In function 'size_t utf8widthC(const char*)':
c.cpp:52:10: error: 'char8_t' was not declared in this scope; did you
mean 'wchar_t'?
52 | for( char8_t c; (c = *str); ++length )
| ^~~~~~~
| wchar_t
c.cpp:52:22: error: 'c' was not declared in this scope
52 | for( char8_t c; (c = *str); ++length )
| ^
c.cpp: In function 'size_t utf8Width512(const char*)':
c.cpp:99:21: error: 'countr_one' was not declared in this scope
99 | unsigned ones = countr_one( nzMask );
| ^~~~~~~~~~
c.cpp: In function 'size_t utf8Width256(const char*)':
c.cpp:150:21: error: 'countr_one' was not declared in this scope
150 | unsigned ones = countr_one( nzMask );
| ^~~~~~~~~~
c.cpp: In function 'int main()':
c.cpp:192:5: error: 'span' was not declared in this scope
192 | span ranges( rawRanges );
| ^~~~
c.cpp:192:5: note: 'std::span' is only available from C++20 onwards
c.cpp:193:5: error: 'char8_t' was not declared in this scope; did you
mean 'wchar_t'?
193 | char8_t rawTypeHeads[4] { 0, 0xC0, 0xE0, 0xF0 };
| ^~~~~~~
| wchar_t
c.cpp:194:9: error: expected ';' before 'typeHeads'
194 | span typeHeads( rawTypeHeads );
| ^~~~~~~~~~
| ;
c.cpp:196:5: error: 'u8string' was not declared in this scope
196 | u8string u8Str( BUF_MIN + 3, (char8_t)0 );
| ^~~~~~~~
c.cpp:196:5: note: 'std::u8string' is only available from C++20 onwards
c.cpp:197:20: error: 'u8string' does not name a type
197 | using u8s_it = u8string::iterator;
| ^~~~~~~~
c.cpp:198:5: error: 'u8s_it' was not declared in this scope
198 | u8s_it
| ^~~~~~
c.cpp:201:30: error: 'itChar' was not declared in this scope
201 | for( size_t width, type; itChar < itCharEnd; itChar += width )
| ^~~~~~
c.cpp:201:39: error: 'itCharEnd' was not declared in this scope
201 | for( size_t width, type; itChar < itCharEnd; itChar += width )
| ^~~~~~~~~
c.cpp:205:23: error: 'ranges' was not declared in this scope; did you
mean 'rawRanges'?
205 | char32_t c = (ranges[type])( mt );
| ^~~~~~
| rawRanges
c.cpp:206:20: error: expected ';' before 'itTail'
206 | for( u8s_it itTail = itChar + width; --itTail > itChar;
c >>= 6 )
| ^~~~~~~
| ;
c.cpp:206:48: error: 'itTail' was not declared in this scope
206 | for( u8s_it itTail = itChar + width; --itTail > itChar;
c >>= 6 )
| ^~~~~~
c.cpp:208:19: error: 'typeHeads' was not declared in this scope
208 | *itChar = typeHeads[type] | (char8_t)c;
| ^~~~~~~~~
c.cpp:210:5: error: 'u8Str' was not declared in this scope
210 | u8Str.resize( itChar - u8Str.begin() );
| ^~~~~
c.cpp:210:19: error: 'itChar' was not declared in this scope
210 | u8Str.resize( itChar - u8Str.begin() );
| ^~~~~~
c.cpp:228:25: error: 'u8string' is not a type
228 | bench( "my: ", [&]( u8string const &str ) { total +=
utf8Width256( (char *)str.c_str() ); } );
| ^~~~~~~~
c.cpp: In lambda function:
c.cpp:228:84: error: request for member 'c_str' in 'str', which is of
non-class type 'const int'
228 | bench( "my: ", [&]( u8string const &str ) { total +=
utf8Width256( (char *)str.c_str() ); } );
|
^~~~~
c.cpp: In function 'int main()':
c.cpp:229:27: error: 'u8string' is not a type
229 | bench( "nerd: ", [&]( u8string const &str ) { total +=
utf8widthC( (char *)str.c_str() ); } );
| ^~~~~~~~
c.cpp: In lambda function:
c.cpp:229:84: error: request for member 'c_str' in 'str', which is of
non-class type 'const int'
229 | bench( "nerd: ", [&]( u8string const &str ) { total +=
utf8widthC( (char *)str.c_str() ); } );
|
^~~~~
--- SoupGate-Win32 v1.05
* Origin: you cannot sedate... all the things you hate (1:229/2)
|
