This patch adds support for dumping named events to the VCD
dumper only. The LXT and LXT2 will be added once this has
been tested more. It also reworks the $dumpvars routine
to be more consistent concerning warning messages for duplicate
signal dump requests and fixes some bugs.
For events you will get extra events at T0 and at $dumpon. I
plan to fix this, but that is much more involved.
For duplicate signal warnings. Implicit duplicates loaded
automatically from a scope will not display a warning. Only
an explicit signal request will print a warning if it was
already included. All other will be silently ignored. This
should limit the warning to only what the user cares about.
For example:
$dumpvars(0, var, scope_that_includes_var);
Will work without a warning message.
$dumpvars(0, scope_that_includes_var, var);
Will generate a warning since the var was already included
by the scope request.
Other enhancements include the start of including type
information in the output. For now integer is added, the
other type information will require changes to the code
generator and hence will only be done in development.
cfe68fe6b4