digitalmars.D.learn - templates in libraries
- "Charlie" <charles jwavro.com> Jun 04 2005
- John Reimer <brk_6502 yahoo.com> Jun 04 2005
- "Charlie" <charles jwavro.com> Jun 04 2005
- "Charlie" <charles jwavro.com> Jun 04 2005
- J C Calvarese<technocrat7 gmail.com> Jun 04 2005
- John Reimer <brk_6502 yahoo.com> Jun 05 2005
I have a library with one template function in it
template array_case(T)
{
void array_change_key_case ( T[ char [] ] map)
{
foreach ( inout char [] keys;map.keys )
{
keys = std.string.tolower(keys );
}
}
}
However when I build the lib, I get the error
Symbol Undefined _D3phd5array13array_case_Aa21array_change_key_caseFHAaAaZv
If i eliminate the template and just make them functions it works fine.
What is the rule with templates in libraries, I have to call the template
somewhere in the code for it to generate stuff or ?
Charlie
Jun 04 2005
Charlie wrote:I have a library with one template function in it template array_case(T) { void array_change_key_case ( T[ char [] ] map) { foreach ( inout char [] keys;map.keys ) { keys = std.string.tolower(keys ); } } } However when I build the lib, I get the error Symbol Undefined _D3phd5array13array_case_Aa21array_change_key_caseFHAaAaZv If i eliminate the template and just make them functions it works fine. What is the rule with templates in libraries, I have to call the template somewhere in the code for it to generate stuff or ? Charlie
Is the template in a file by itself? I reported this problem earlier; see post "Hair-pulling, D, and Optlink" Walter game the solution for dealing with this very real shortcoming in OMF libraries containing templates: digitalmars.D/23701 I imagine that's what your problem was. -JJR
Jun 04 2005
"Charlie" <charles jwavro.com> Hey John, That did work thanks :). I remember reading something about this but forget the title. This is pretty rough , I wonder though is OMF the only format that suffers from this ? I don't know enough about C++ templates to guess how they do it . Charlie "John Reimer" <brk_6502 yahoo.com> wrote in message news:d7t782$a6t$1 digitaldaemon.com...Charlie wrote:I have a library with one template function in it template array_case(T) { void array_change_key_case ( T[ char [] ] map) { foreach ( inout char [] keys;map.keys ) { keys = std.string.tolower(keys ); } } } However when I build the lib, I get the error Symbol Undefined
If i eliminate the template and just make them functions it works fine. What is the rule with templates in libraries, I have to call the
somewhere in the code for it to generate stuff or ? Charlie
Is the template in a file by itself? I reported this problem earlier; see post "Hair-pulling, D, and Optlink" Walter game the solution for dealing with this very real shortcoming in OMF libraries containing templates: digitalmars.D/23701 I imagine that's what your problem was. -JJR
Jun 04 2005
An 'slightly' better soloution is to put that int* call in a mixin
int comdatKludge = 0;
template kludge ()
{
int * kludge = &comdatKludge;
}
into the library, then the client just calls
mixin kludge;
"John Reimer" <brk_6502 yahoo.com> wrote in message
news:d7t782$a6t$1 digitaldaemon.com...
Charlie wrote:
I have a library with one template function in it
template array_case(T)
{
void array_change_key_case ( T[ char [] ] map)
{
foreach ( inout char [] keys;map.keys )
{
keys = std.string.tolower(keys );
}
}
}
However when I build the lib, I get the error
Symbol Undefined
If i eliminate the template and just make them functions it works fine.
What is the rule with templates in libraries, I have to call the
somewhere in the code for it to generate stuff or ?
Charlie
Is the template in a file by itself?
I reported this problem earlier; see post "Hair-pulling, D, and Optlink"
Walter game the solution for dealing with this very real shortcoming in
OMF libraries containing templates:
digitalmars.D/23701
I imagine that's what your problem was.
-JJR
Jun 04 2005
In article <d7takf$c4j$1 digitaldaemon.com>, Charlie says...An 'slightly' better soloution is to put that int* call in a mixin int comdatKludge = 0; template kludge () { int * kludge = &comdatKludge; } into the library, then the client just calls mixin kludge;
Hopefully Walter is able to find a fix for this problem at some point. I've added some more information to http://www.prowiki.org/wiki4d/wiki.cgi?DocComments/Template to help explain the problem and some possible solutions (basically, I cut-and-pasted some of these posts into the Wiki). jcc7
Jun 04 2005
Charlie wrote:An 'slightly' better soloution is to put that int* call in a mixin int comdatKludge = 0; template kludge () { int * kludge = &comdatKludge; } into the library, then the client just calls mixin kludge;
Yeah... that does look a little cleaner! Nice one! Although it does advertise the fact that their is a kludge! :-) -JJR
Jun 05 2005