antchfx / xpath / 21992530923

78%

master: 78%

Pull #120

github

Fix last() predicate on grouped expressions

When evaluating expressions like (//author)[last()], the last() function
was counting sibling nodes per-parent instead of counting the total nodes
in the grouped result set. This caused incorrect matches when group
members came from different parent nodes.

The fix ensures that b.firstInput is always set to the groupQuery in the
nodeGroup case, and adds handling for *groupQuery in the lastFuncQuery
conversion, using a cloned query to avoid consuming the shared input.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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