What does 'inline' mean?

[Steven Schveighoffer]

On 6/11/20 6:05 AM, Walter Bright wrote:
> On 6/10/2020 1:10 PM, kinke wrote:
>> TLDR: Templates, with the current emission scheme, can definitely not 
>> be used to emit a function into every referencing CU.
> 
> Yes, but in Manu's case the idea is to not need to link with a library. 
> It's hard to see how the compiler would know that a template was 
> instantiated in a library - meaning it'll emit an instance for at least 
> one of the modules given on the command line.
> 
> That should resolve the particular issue Manu was having.

An example:

--- b.d:
module b;

int foo(T)()
{
    return 1;
}

enum x = foo!int();

--- a.d:
import b;

void main()
{
    auto  = foo!int();
}
---

 > dmd a.d

Undefined symbols for architecture x86_64:
   "__D1b__T3fooTiZQhFNaNbNiNfZi", referenced from:
       __Dmain in a.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see 
invocation)
Error: linker exited with status 1

comment out the enum and it works.

-Steve