If a 1.5 template called a 1.4 template, its parent would be its
'dynamic' parent (the 1.5 template), whose parent would be its lexical
parent - breaking the dynamic lookup. I've changed it so that when
using a dynamic lookup, 1.5+ templates are skipped over. That means
they can use whatever variable names they wish without issues.
It does mean that if a 1.4- template was specifically written to use
dynamic lookup, then it wouldn't be callable from 1.5. So it might
be better if they didn't skip over 1.5+ templates.
Alternatively if might be better to always lexical scoping, even for
older versions, on the assumption that it was a bug.
[SVN r75263]
Files are now permanently loaded. Quickbook substrings are stored as
references into the file. Now positions are stored as iterators into
the original file, the line and column is calculated when messages are
output.
This doesn't have much effect on efficiency but it simplifies a few
things.
[SVN r75253]
