This fix only affects following transforms, of which there are few right now.
Also removed a stray token mutation in QuoteTransformer.
Change-Id: Id6d4adce944b06fc1a3651cfbf63fc2670125225
* Tokens are now immutable. The progress of transformations is tracked on
chunks instead of tokens. Tokenizer output is cached and can be directly
returned without a need for cloning. Transforms are required to clone or
newly create tokens they are modifying.
* Expansions per chunk are now shared between equivalent frames via a cache
stored on the chunk itself. Equivalence of frames is not yet ideal though,
as right now a hash tree of *unexpanded* arguments is used. This should be
switched to a hash of the fully expanded local parameters instead.
* There is now a vastly improved maybeSyncReturn wrapper for async transforms
that either forwards processing to the iterative transformTokens if the
current transform is still ongoing, or manages a recursive transformation if
needed.
* Parameters for parser functions are now wrapped in abstract Params and
ParserValue objects, which support some handy on-demand *value* expansions.
Keys are always expanded. Parser functions are converted to use these
interfaces, and now properly expand their values in the correct frame.
Making this expansion lazier is certainly possible, but would complicate
transformTokens and other token-handling machinery. Need to investigate if
it would really be worth it. Dead branch elimination is certainly a bigger
win overall.
* Complex recursive asynchronous expansions should now be closer to correct
for both the iterative (transformTokens) and recursive (maybeSyncReturn
after transformTokens has returned) code paths.
* Performance degraded slightly. There are no micro-optimizations done yet
and the shared expansion cache still has a low hit rate. The progress
tracking on chunks is not yet perfect, so there are likely a lot of unneeded
re-expansions that can be easily eliminated. There is also more debug
tracing right now. Obama currently expands in 54 seconds on my laptop.
Change-Id: I4a603f3d3c70ca657ebda9fbb8570269f943d6b6
* Setting the rank on tokens is still used currently, but will be phased out
in favor of setting it on chunks. Tokens will be immutable to allow sharing
and caching without a need for cloning.
* Only register for newline and end tokens in QuoteTransformer when active.
Change-Id: I2c45bc7e4a105219a1404ab221eed7f242128f1e
This makes it possible to transclude list items from a template.
Note: "5 quotes" test is broken by this patch, it appears that ListHandler
newline processing is changing some state which mysteriously affects the
QuoteTransformer. This is ominous, hopefully there's a simple explanation...
gwicke: fix a bug in tokenizer triggered by definition lists like this:
**; foo : bar
Change-Id: I4e3a86596fe9bffcbfc4bf22895362c3bf742bad
