for example:

void ASSERT(string fmt, string file = __FILE_FULL_PATH__, size_t line = __LINE__, T...) (bool c, scope T a)  @nogc {
   assert(c, string, file, line);
}

but i get this error:

error.d(39): Error: found file when expecting )
error.d(39): Error: found ) when expecting ; following statement
error.d(39): Deprecation: use { } for an empty statement, not ;

I want d to print the error message with some format information, and show the right file and line for the original location.

Is it doable ?

On 2019-07-19 17:30, Newbie2019 wrote:
> for example:
> 
> void ASSERT(string fmt, string file = __FILE_FULL_PATH__, size_t line = __LINE__, T...) (bool c, scope T a)  @nogc {
>     assert(c, string, file, line);
> }
> 
> but i get this error:
> 
> error.d(39): Error: found file when expecting )
> error.d(39): Error: found ) when expecting ; following statement
> error.d(39): Deprecation: use { } for an empty statement, not ;
> 
> I want d to print the error message with some format information, and show the right file and line for the original location.
> 
> Is it doable ?

No, not as far as I know. But you can throw an `AssertError` explicitly, which is what `assert` does when it fails. This allows to pass the file and line information [1]. Or call `onAssertError` which if called first, when an `assert` fails [2].

[1] https://github.com/dlang/druntime/blob/3620736bc88129b65f9a01290189de617a6c3b07/src/core/exception.d#L81-L84

[2] https://github.com/dlang/druntime/blob/3620736bc88129b65f9a01290189de617a6c3b07/src/core/exception.d#L417-L449

-- 
/Jacob Carlborg

On Friday, 19 July 2019 at 15:30:25 UTC, Newbie2019 wrote:
> for example:
>
> void ASSERT(string fmt, string file = __FILE_FULL_PATH__, size_t line = __LINE__, T...) (bool c, scope T a)  @nogc {
>    assert(c, string, file, line);
> }
>
> but i get this error:
>
> error.d(39): Error: found file when expecting )
> error.d(39): Error: found ) when expecting ; following statement
> error.d(39): Deprecation: use { } for an empty statement, not ;
>
> I want d to print the error message with some format information, and show the right file and line for the original location.
>
> Is it doable ?

Isn't assert a template (file and line) rather than a plain function call?

Worst comes to worst, you can provide your own _d_assert(?) and override object.d then just call the C assert

On 2019-07-19 22:16, Max Haughton wrote:

> Isn't assert a template (file and line) rather than a plain function call?

No. It's a keyword, it's built-in to the compiler. It get extra benefits compared to a regular functions: the asserts will be removed in release builds.

-- 
/Jacob Carlborg

On Monday, 22 July 2019 at 09:54:13 UTC, Jacob Carlborg wrote:
> On 2019-07-19 22:16, Max Haughton wrote:
>
>> Isn't assert a template (file and line) rather than a plain function call?
>
> No. It's a keyword, it's built-in to the compiler. It get extra benefits compared to a regular functions: the asserts will be removed in release builds.

Thanks for explain.