Is it possible to set/override the name of the source file when piping it into DMD via stdin?

[H. S. Teoh]

On Wed, Dec 13, 2023 at 07:37:09PM +0000, Siarhei Siamashka via Digitalmars-d-learn wrote:
> Example:
> 
> ```D
> import std;
> void main() {
>   deliberate syntax error here
> }
> ```
> 
> ```bash
> $ cat example.d | dmd -run -
> __stdin.d(3): Error: found `error` when expecting `;` or `=`, did you mean
> `deliberate syntax = here`?
> __stdin.d(3): Error: found `}` when expecting `;` or `=`, did you mean
> `error here = End of File`?
> ```
> 
> Now I'm curious. Is it possible to somehow communicate the real source
> file name to `dmd`, so that it shows up in the error log instead of
> "__stdin.d"?

Add a module declaration to your source file. For example:

	echo 'module abc; import std; void main(){writefln(__MODULE__);}' | dmd -run -

Output:
	abc

`__stdin` is used as a placeholder when no module declaration is
present, and dmd doesn't know the filename (which is what it would
normally have used for the module name in this case).


T

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