DCG and phrase/3

How to: DCG and phrase/3

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DCG

library(pure_input): Pure Input from files and streams

Reference: Line_count/2 and phrase_from_file

Prolog DCG Primer

From: Tabled execution (SLG resolution)

Left recursion , a goal calling a variant of itself recursively and thus looping under the normal Prolog SLD resolution is avoided by suspending the variant call and resuming it with answers from the table.

Example with left recursive grammar. Removing left recursion in DCG - Prolog