Arithmetic evaluation: Difference between revisions
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You can also display the syntax tree, for example:
<lang j> parse '
┌─────────────────────────────────────────────────────┬───────────────────┐
│┌───┬───────┬───┬───────┬───┬─┬───────┬───┬───────┬─┐│┌───────┬─┬───────┐│
││┌─┐│┌─────┐│┌─┐│┌─────┐│┌─┐│(│┌─────┐│┌─┐│┌─────┐│)│││┌─┬─┬─┐│4│┌─┬─┬─┐││
│││$│││┌─┬─┐│││
││└─┘│││0│2│││└─┘│││0│3│││└─┘│ │││0│4│││└─┘│││0│5│││ │││└─┴─┴─┘│ │└─┴─┴─┘││
││ ││└─┴─┘││
││ │└─────┘│
│└───┴───────┴───┴───────┴───┴─┴───────┴───┴───────┴─┘│ │
└─────────────────────────────────────────────────────┴───────────────────┘</lang>
At the top level, the first box is a list of terminals, and the second box represents their parsed structure within the source sentence, with numbers indexing the respective terminals.
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