Compile time format string check

[Richard (Rikki) Andrew Cattermole]

On 23/03/2026 6:29 PM, Ada wrote:
> On Sunday, 22 March 2026 at 22:49:24 UTC, Richard (Rikki) Andrew 
> Cattermole wrote:
>> If its a string literal it is already handled as part of bindings: 
>> https://dlang.org/spec/pragma.html#printf
>>
>> I understand that you may be wanting a runtime error, but I'd suggest 
>> disallowing that entirely and go with a template parameter to provide 
>> your format to make sure its seeable to the compiler.
> 
> I clearly said compile-time. maybe you misspoke.
> It's a bit of a nuisance because the function call then doesn't resemble 
> C that much anymore. (it's called betterc)

The only way to do it at CT, is either with the pragma with a string 
literal for the format, or the format must be provided via a template 
parameter.

You cannot do this, with a function parameter at CT.