On Monday, 28 August 2023 at 06:38:50 UTC, Vino wrote:
Hi All,
The the below code is not working, hence requesting your help.
Code:
```
import std.stdio;
import std.process: environment;
void main () {
int* ext(string) = &environment.get("PATHEXT");
writeln(*ext);
}
```
Problems is that "PATHEXT" is a runtime argument. If you really
want to get a pointer to the function for that runtime argument
you can use a lambda:
```d
import std.stdio;
import std.process: environment;
void main () {
alias atGet = {return environment.get("PATHEXT");}; // really
lazy
writeln(atGet); // pointer to the lambda
writeln((*atGet)()); // call the lambda
}
```
There might be other ways, but less idiomatic (using a struct +
opCall, a.k.a a "functor")
