Makes r disappear in a sequence, letting its children take its place. It's equivalent to the '%' operator. Given A <- B %C D and C <- E F, a successful parse for A will generate a three with four children: B, E, F and D parse trees.
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Makes r disappear in a sequence, letting its children take its place. It's equivalent to the '%' operator. Given A <- B %C D and C <- E F, a successful parse for A will generate a three with four children: B, E, F and D parse trees.