digitalmars.D.bugs - [Issue 9091] New: Perhaps another forward referencing bug.
- d-bugmail puremagic.com (87/87) Nov 28 2012 http://d.puremagic.com/issues/show_bug.cgi?id=9091
- d-bugmail puremagic.com (12/12) Nov 29 2012 http://d.puremagic.com/issues/show_bug.cgi?id=9091
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- d-bugmail puremagic.com (8/9) Jan 13 2013 http://d.puremagic.com/issues/show_bug.cgi?id=9091
- d-bugmail puremagic.com (7/7) Jan 17 2013 http://d.puremagic.com/issues/show_bug.cgi?id=9091
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http://d.puremagic.com/issues/show_bug.cgi?id=9091
Summary: Perhaps another forward referencing bug.
Product: D
Version: D2
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: DMD
AssignedTo: nobody puremagic.com
ReportedBy: turkeyman gmail.com
I've created a new bug from this thread:
http://d.puremagic.com/issues/show_bug.cgi?id=9065
That thread has forked into unrelated conversations, and I suspect this is a
separate bug anyway...
Kenji: I boiled this down as much as I could...
class Test
{
void func()
{
void templateFunc( T )( ref const T obj )
{
foreach( m; __traits( allMembers, T ) )
{
pragma(msg, m);
static if( isVariable!( __traits(getMember, T, m) ) )
{
//...
}
}
}
templateFunc( this );
}
// some class members
int x;
}
isVariable throws lots of errors when considering the class members.
Note:
__traits(allMembers, T) and __traits(getMember, T, m)
These should also work with class instances, not just types, eg:
__traits(allMembers, obj) and __traits(getMember, obj, m)
And these combinations should also work:
__traits(allMembers, T) and __traits(getMember, obj, m)
__traits(allMembers, obj) and __traits(getMember, T, m)
All these configurations throw errors, and the errors are different for each
configuration.
Depends on:
/**
* Detect whether symbol or type $(D X) is a function.
*/
template isFunction(X...) if (X.length == 1)
{
static if (is(typeof(&X[0]) U : U*) && is(U == function) ||
is(typeof(&X[0]) U == delegate))
{
// x is a (nested) function symbol.
enum isFunction = true;
}
else static if (is(X[0] T))
{
// x is a type. Take the type of it and examine.
enum isFunction = is(T == function);
}
else
enum isFunction = false;
}
/**
* Detect whether symbol $(D X) is a run-time variable.
*/
template isVariable(X...) if (X.length == 1)
{
static if (!is(X[0]) &&
!is(typeof(X[0]) == void) &&
!isFunction!(X[0]))
{
enum isVariable =
is(typeof({ auto ptr = &X[0]; }))
|| is(typeof({ enum off = X[0].offsetof; }));
}
else
enum isVariable = false;
}
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Nov 28 2012
d-bugmail puremagic.com
http://d.puremagic.com/issues/show_bug.cgi?id=9091
Manu <turkeyman gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |major
I have a hard deadline (like, proper hard) tomorrow, I'd really like to have
this fix in there. Is there anyone who can possibly look into/comment on it?
I bumped the priority to help it get noticed...
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Nov 29 2012
http://d.puremagic.com/issues/show_bug.cgi?id=9091
Furthermore reduced case:
template isVariable(X...) if (X.length == 1)
{ enum isVariable = true; }
class C
{
int x;
void func()
{
enum is_x = isVariable!(__traits(getMember, C, "x"));
}
}
I posted a report bug 9100 to explain the current semantic analysis weird
behavior on template argument. I think that it is the root cause of this bug.
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Nov 30 2012
http://d.puremagic.com/issues/show_bug.cgi?id=9091
Kenji Hara <k.hara.pg gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Perhaps another forward |Using __traits(getMember)
|referencing bug. |on template argument fails
| |inside member function
Changed summary.
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Nov 30 2012
http://d.puremagic.com/issues/show_bug.cgi?id=9091
Kenji Hara <k.hara.pg gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |pull, rejects-valid
https://github.com/D-Programming-Language/dmd/pull/1340
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Nov 30 2012
http://d.puremagic.com/issues/show_bug.cgi?id=9091 Commit pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/a4fb02fb3572c1616e7aad55fdd07b22b12242b8 fix Issue 9091 - Using __traits(getMember) on template argument fails inside member function -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Dec 09 2012
http://d.puremagic.com/issues/show_bug.cgi?id=9091
yebblies <yebblies gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |yebblies gmail.com
Fixed?
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Jan 12 2013
http://d.puremagic.com/issues/show_bug.cgi?id=9091Fixed?Kenji was working on these, the prototypes he gave me worked for me, I'm not sure if it was accepted/merged though. Kenji? -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Jan 13 2013
http://d.puremagic.com/issues/show_bug.cgi?id=9091 Unfortunately, this still not be fixed completely. https://github.com/D-Programming-Language/dmd/pull/1406 -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Jan 17 2013
http://d.puremagic.com/issues/show_bug.cgi?id=9091 Commit pushed to master at https://github.com/D-Programming-Language/dmd https://github.com/D-Programming-Language/dmd/commit/8a781342c90c0fc93a52876ceb972500a1603d42 fix Issue 9091 - Using __traits(getMember) on template argument fails inside member function Use ThisExp instead of VarExp to avoid interpretation on template arguments. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
Mar 01 2013
http://d.puremagic.com/issues/show_bug.cgi?id=9091
Kenji Hara <k.hara.pg gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
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Mar 01 2013