9.1 Chunks in General

The module Chunk contains procedures operating on chunks.

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{Value.'.' +RC +LI X}

returns the field X of RC at feature LI.

HasFeature

{Value.hasFeature +RC +LI ?B}

tests whether RC has feature LI.

CondSelect

{Value.condSelect +RC +LI X Y}

returns the field Y of RC at LI, if RC has feature LI. Otherwise, returns X.

IsChunk

{Chunk.is +X ?B}

tests whether X is a chunk.

NewChunk

{Chunk.new +R ?C}

returns a new chunk with the same features and fields as R.