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digitalmars.D.learn - An array()/map inlining problem

reply bearophile <bearophileHUGS lycos.com> writes:
This is interesting, if you compile it with:
dmd test.d
It works. If you compile it with:
dmd -inline test.d
It doesn't compile and dmd returns:
test.d(5): Error: function D main is a nested function and cannot be accessed
from array


import std.algorithm: map;
import std.array: array;
void main() {
    int c;
    array(map!((x){return c;})([1]));
}


I think this is a compiler bug, right (because I think it must not compile in
both cases or compile in both)?

Bye,
bearophile
Sep 07 2010
parent reply Jonathan M Davis <jmdavisprog gmail.com> writes:
On Tuesday 07 September 2010 19:58:01 bearophile wrote:

 This is interesting, if you compile it with:
 dmd test.d
 It works. If you compile it with:
 dmd -inline test.d
 It doesn't compile and dmd returns:
 test.d(5): Error: function D main is a nested function and cannot be
 accessed from array
 
 
 import std.algorithm: map;
 import std.array: array;
 void main() {
     int c;
     array(map!((x){return c;})([1]));
 }
 
 
 I think this is a compiler bug, right (because I think it must not compile
 in both cases or compile in both)?
 
 Bye,
 bearophile


Inlining should _never_ affect the compilability of a program. It should be 
essentially invisible to programmer. It might be visible if you examined the 
actual assembly or resultant binary, and hopefully -inline makes your program 
faster, but what errors you do or don't get and the semantics of your program 
should be identical. This is most definitely a bug.

- Jonathan M Davis
Sep 07 2010
parent bearophile <bearophileHUGS lycos.com> writes:
Jonathan M Davis:

 Inlining should _never_ affect the compilability of a program. It should be 
 essentially invisible to programmer. It might be visible if you examined the 
 actual assembly or resultant binary, and hopefully -inline makes your program 
 faster, but what errors you do or don't get and the semantics of your program 
 should be identical. This is most definitely a bug.


http://d.puremagic.com/issues/show_bug.cgi?id=4841

Bye,
berarophile
Sep 08 2010