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This commit is contained in:
Jeff Hill
1997-06-25 06:47:15 +00:00
parent d5476089b1
commit c8ec70de08
1 changed files with 8 additions and 5 deletions
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13
README.cxxTemplates
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@@ -1,18 +1,22 @@
The templates supplied with EPICS base are in $(EPICS)/base/src/cxxTemplates
The C++ templates supplied with EPICS base are in
"$(EPICS)/base/src/cxxTemplates".
In Stroustrups's "The C++ Programming Language" Appendix A: r.14.9
(ANSI/ISO resolutions) a mechanism is described for the explicit
instantiation of template member functions (that are not inline).
At this time some compilers do not support this mechanism (and use
a template database or smart linker instead). Other compilers
a template database snd/or smart linker instead). Other compilers
(such as g++) provide only limited support for other forms of
instantiation.
instantiation (g++ does not yet provide a template database or
a smart linker for templates).
Since there is no defacto standard mechanism for instatiating
templates at this time we are defining the preprocessor flag
EXPL_TEMPL in the build system when the compiler supports
explicit instantiation.
explicit instantiation and the compiler does not support
automatic instantiation via a smart linker and/or template
database (currently this is only g++).
EPICS codes that use templates may need to include a code block
as follow that instantiates the template only once into each
@@ -20,7 +24,6 @@ program.
#include <classXYZ.h>
#include <templXXX.h>
#include <templXXX.cc>
//
// if the compiler supports explicit instantiation of