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Add original_node and controller_expressions bindings - #9
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DavidSagan
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original_node(lat, node) wraps PALSParserCpp's original_node: the node of lat.original a node of expanded, full_expanded, adjunct or combined came from, or None for a computed or controller-driven value. A program reads it to see the expression behind a number, for instance whether it was delayed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
controller_expressions(lat, node) wraps PALSParserCpp's call of that name: for each controls entry reaching a parameter, ABSOLUTE or RELATIVE, its `expression` node in lat.original, in evaluation order. A parameter may be driven by several controllers, hence a list. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Python bindings for
original_nodeandcontroller_expressionsfrom pals-project/PALSParserCpp#99.original_node(lat, node)returns the node oflat.originalthat one node oflat.expanded,lat.full_expanded,lat.adjunctorlat.combinedcame from. It returnsNonefor a value the parser computed and for one an ABSOLUTE controller drives. Every expanded value is a number; this leads back to the expression it was written as, so a program can tell whether it was delayed (expr(...)). A value written by asetleads to that set'svalue.Documented in
docs/src/guide/lattices.mdand listed indocs/src/api.md.controller_expressions(lat, node)lists every controller driving a parameter, ABSOLUTE or RELATIVE: eachcontrolsentry'sexpressionnode inlat.original, in evaluation order. Several controllers may drive one parameter, so this is a list. Threeget_parentsteps from an expression reach its controller.Tests: 124 pass (5 new) against PALSParserCpp
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