Dear All,

In attempting to learn and use code generation, it
would be useful to be able to view the source code
that gets generated.

However, with various combinations of templates, UDAs, and
mixins it has not been easy.

Is there some standard way this is done?

Optimal would be to print out the entire generated source
code to allow inspection.

Best Regards,
James

On Wednesday, 15 September 2021 at 19:59:43 UTC, james.p.leblanc wrote:

Use the mixin compiler flag

dmd -mixin=<whatever-name> file.d

Beware, this will also include all the mixin code from standard library and runtime.

But it's manageable, reflecting on my experience.

On Thursday, 16 September 2021 at 03:26:46 UTC, Tejas wrote:

Tejas,

Thank you for your kind response. Wow, at first the large output file
from a small test program was a bit surprising .., but actually it is
manageable to dig through to find the interesting bits.

So, this is quite useful! Thanks again, now I am off to do some digging...

Best Regards,
James

On Thursday, 16 September 2021 at 04:54:21 UTC, james.p.leblanc wrote:

Note that that will only give the expansions from string mixins, not from template mixins, templates and other things.

On Wednesday, 15 September 2021 at 19:59:43 UTC, james.p.leblanc wrote:

Apart from -mixin, there's also the undocumented -vcg-ast switch that prints the AST before code generation, showing instantiated templates and unrolled static foreach loops.