New __FILE_DIR__ trait?
Jonathan Marler via Digitalmars-d
digitalmars-d at puremagic.com
Fri Jul 29 07:08:49 PDT 2016
On Thursday, 28 July 2016 at 17:21:52 UTC, Sebastien Alaiwan
wrote:
> On Thursday, 28 July 2016 at 06:21:06 UTC, Jonathan Marler
> wrote:
>> auto __DIR__(string fileFullPath = __FILE_FULL_PATH__) pure
>> {
>> return fileFullPath.dirName;
>> }
>
> Doesn't work, I don't think you can wrap such things ( __FILE__
> and such ):
>
> import std.stdio;
>
> int main()
> {
> printNormal();
> printWrapped();
> return 0;
> }
>
> void printNormal(int line = __LINE__)
> {
> writefln("%s", line);
> }
>
> void printWrapped(int line = __MY_LINE__)
> {
> writefln("%s", line);
> }
>
> // wrapped version
> int __MY_LINE__(int line = __LINE__)
> {
> return line;
> }
>
> $ rdmd demo.d
> 5
> 15 (should be 6!)
>
> Thus, the suggested implementation of __DIR__ would behave very
> differently from a builtin one. I'm not saying we need a
> builtin one, however, it might not be a good idea to name it
> this way.
Huh, interesting case, didn't think of that one.
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