Neil Hodgson wrote:
I'm a little surprised that you didn't want a mechanism for storing
extra lexer state. The standard byte wide style buffer quickly runs
out of states and the per-line style integer can be limiting so I've
thought in the past about providing lexer entry points for allocating
and deallocating per-document lexer state.
Neil
That's what I implemented. UDL maintains its own state machine
that sits apart from the Scintilla styles. It allows up to 2^25
states (reserving 6 bits for a hash of a heredoc delimiter). From
the user's Luddite program it calculates which UDL states are safe
to resume lexing at the start of a line (e.g. strings are not safe,
as you need to move arbitrarily back to find the delimiter).
I had a developer who once casted the LineState to (void *) so he
could store complete heredoc delimiters in it. We had an interesting
memory leak with that approach. But it would be cool if LineState
was defined as union{int; void*}, and scintilla provided Finalizers
for each line and the buffer as a whole.
- Eric
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