fix Issue 22407 - importC: Error: cannot implicitly convert expression of type 'extern (C) int(int a)' to 'const(extern (C) int function(int))'

[ibuclaw]

If an initializer is an array or function symbol, and the target object is a pointer, then C11 6.3.2.1-4 conversion rules apply.

[dlang-bot]

Thanks for your pull request, @ibuclaw!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	22399	major	importC: Error: static variable cannot be read at compile time
✓	22400	critical	importC: Error: unknown, when compiling source with typedef'd initializer
✓	22407	major	importC: Error: cannot implicitly convert expression of type 'extern (C) int(int a)' to 'const(extern (C) int function(int))'

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "stable + dmd#13182"

[ibuclaw]

With a tweak to the condition, this now fixes both issue 22399 and 22400.

[thewilsonator]

please rebase

[ibuclaw]

please rebase

I'll do one but the others'll have to wait a day.