VS 2019 fails on Formatting of non-void pointers is disallowed (C2338)

[zkheraj]

Trying to evaluate between Spdlog and G3log and our in-house logging utilities.
Was able to compile but getting Formatting of non-void pointers is disallowed.

Are we able to print char* or wchar_t* pointers ?

[tt4g]

Duplicate #1492

Should use fmt::ptr().

See fmt API document: https://fmt.dev/9.1.0/api.html#_CPPv4I0EN3fmt3ptrEPKv1T

[zkheraj]

Thank you for the tip.

[zkheraj]

With fmt::ptr the address is printed. Can it print the value at that address ?

 wchar_t wsz[MAX_PATH] = L"This is a wide-character string";
 char sz[MAX_PATH] = "This is a character string";

 Test_wchar(wsz);
 Test_char(sz);

void Test_wchar(wchar_t* pwsz)
{
DF_TRACE_LOG_CONSOLE(L"Test_wchar printing {}", fmt::ptr(pwsz));
}

void Test_char(char* psz)
{
DF_TRACE_LOG_CONSOLE("Test_char printing {:p}", fmt::ptr(psz));
}

OUTPUT:
[2023-06-02 14:36:21] [17988][28144][T] :: Test_wchar printing 0x136f730
[2023-06-02 14:36:21] [17988][28144][T] :: Test_char printing 0x136f620

[tt4g]

The char * should be able to be output.

void log(char* str)
{
    spdlog::info("{}". str);
}

Note
If you want to add char* directly to the first argument, you must use fmt::runtime().
See #2473

wchar_t * must define an SPDLOG_WCHAR_TO_UTF8_SUPPORT macro.
However, this feature supports only Windows OS.

spdlog/include/spdlog/tweakme.h

Lines 90 to 94 in 31cf79a

	///////////////////////////////////////////////////////////////////////////////
	// Uncomment to enable wchar_t support (convert to utf8)
	//
	// #define SPDLOG_WCHAR_TO_UTF8_SUPPORT
	///////////////////////////////////////////////////////////////////////////////