On Thursday, 25 August 2016 at 14:30:00 UTC, Meta wrote:
On Thursday, 25 August 2016 at 14:06:32 UTC, Antonio Corbi
wrote:
Hello,
Trying to compile this example from Chuck Allison:
-------------------------------------------
import std.stdio;
import std.functional;
void main() {
auto div3 = (double x) => x/3.0;
auto sq = (double x) => x*x;
auto pls1 = (double x) => x+1.0;
alias compose!(div3,sq,pls1) comp;
writeln(comp(2.0)); // 3 == (2.0+1.0)^^2 / 3.0
alias pipe!(div3,sq,pls1) pip;
writeln(pip(2.0)); // 1.44444 == (2.0/3.0)^^2 + 1.0
}
--------------------------------------------
I get this error (with DMD64 D Compiler v2.071.1 in linux):
compose.d(8): Error: template instance compose!(div3, sq,
pls1) compose is not a template declaration, it is a module
But the error disappears if I use this import:
import std.functional:compose,pipe;
Is this a bug or is it the expected behaviour under the recent
'import' changes?
Thanks!
Try renaming your source file to something other than
compose.d, I think that's confusing the compiler.
Yep, that did the trick!
I also noticed that 'old' compilers like:
- gdc: gdc (GCC) 6.1.1 20160501
- ldc: LDC - the LLVM D compiler (1.0.0): based on DMD v2.070.2
and LLVM 3.8.0
*do* compile the original code posted without error.
Thank's to all of you for your answers.
