[Issue 693] 'this' can't be used as an alias parameter for a mixin
http://d.puremagic.com/issues/show_bug.cgi?id=693 --- Comment #6 from github-bugzi...@puremagic.com 2013-01-21 00:20:12 PST --- Commits pushed to master at https://github.com/D-Programming-Language/d-programming-language.org https://github.com/D-Programming-Language/d-programming-language.org/commit/9e84dccf6286dd7e718f247bf1a623cd50f68553 fix Issue 693 - 'this' can't be used as an alias parameter for a mixin https://github.com/D-Programming-Language/d-programming-language.org/commit/0cf09c6b06c13345024772864f6654002904244c Merge pull request #239 from 9rnsr/fix693 Issue 693 - 'this' can't be used as an alias parameter for a mixin -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 693] 'this' can't be used as an alias parameter for a mixin
http://d.puremagic.com/issues/show_bug.cgi?id=693 Walter Bright bugzi...@digitalmars.com changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution||FIXED --- Comment #5 from Walter Bright bugzi...@digitalmars.com 2011-07-01 00:31:09 PDT --- https://github.com/D-Programming-Language/dmd/commit/5a1f396e915e083ce30c5f09f4e1ef1a9e704fda https://github.com/D-Programming-Language/dmd/commit/c9e26681a834beb6b211f41234163707453f4ff1 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 693] 'this' can't be used as an alias parameter for a mixin
http://d.puremagic.com/issues/show_bug.cgi?id=693 Kenji Hara k.hara...@gmail.com changed: What|Removed |Added CC||zan77...@nifty.com --- Comment #4 from Kenji Hara k.hara...@gmail.com 2011-05-07 06:20:37 PDT --- *** Issue 4799 has been marked as a duplicate of this issue. *** -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
[Issue 693] 'this' can't be used as an alias parameter for a mixin
http://d.puremagic.com/issues/show_bug.cgi?id=693
Simen Kjaeraas simen.kja...@gmail.com changed:
What|Removed |Added
CC||simen.kja...@gmail.com
--- Comment #2 from Simen Kjaeraas simen.kja...@gmail.com 2011-04-12 01:57:39
PDT ---
This also a problem for non-mixin templates:
struct MyCallable {
int opCall( int n ) {
return n;
}
auto mapthis( int[] arr ) {
return map!this( arr );
}
}
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[Issue 693] 'this' can't be used as an alias parameter for a mixin
http://d.puremagic.com/issues/show_bug.cgi?id=693
--- Comment #3 from Simen Kjaeraas simen.kja...@gmail.com 2011-04-12 03:01:10
PDT ---
Thinking about this some more, fixing this bug could lead to safer array
indexing for one, through a limited system of dependent types:
struct SafeArray( T ) {
T[] data;
struct Index( alias arr ) {
size_t idx;
// Add safety checks, overflow handling, etc.
}
Index!this makeIndex( size_t n ) {
typeof( return ) result;
result.idx = n;
return result;
}
T opIndex( Index!this idx ) {
return data[idx.idx];
}
}
unittest {
SafeArray!int arr;
arr.data = [1,2,3,4,5,6,7,8,9,0];
auto idx = arr.makeIndex( 3 );
writeln( arr[idx] ); // Completely safe indexing of array, enforced by type
system.
}
There may be a problem in that compiler considers 'this' a local parameter to a
non-global template, which is currently illegal. Not sure how much of a problem
this might be in practice.
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[Issue 693] 'this' can't be used as an alias parameter for a mixin
http://d.puremagic.com/issues/show_bug.cgi?id=693 Andrei Alexandrescu and...@metalanguage.com changed: What|Removed |Added Status|NEW |ASSIGNED CC||and...@metalanguage.com AssignedTo|nob...@puremagic.com|bugzi...@digitalmars.com --- Comment #1 from Andrei Alexandrescu and...@metalanguage.com 2010-11-26 13:33:57 PST --- Bug present in 1.065 and 2.050 with different error messages. 1.065: test.d(14): Error: mixin printer_mix!(this) does not match template declaration printer_mix(alias T) 2.050: test.d(14): Error: expression this is not a valid template value argument -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email --- You are receiving this mail because: ---
