Nyall Dawson 84fc3c3b3d Implement method for caching values within expression contexts
Can be used to store the results of expensive sub-expression
calculations (eg layer aggregates), so that future expression
evaluation using the same context does not have to recalculate
the cached values.
2016-05-17 10:53:24 +10:00
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2016-05-13 22:23:03 +02:00
2016-05-14 00:21:50 +02:00
2016-04-29 14:10:26 +02:00