feat: support multi-dimensional array indexing and iteration - #649
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) C# true multi-dimensional arrays (rank > 1, e.g. int[,]) previously threw when indexed via path expressions (Array's non-generic IList indexer rejects rank > 1) or iterated with {{#each}} (cast to T[] failed for non-SZArrays). Adds a lazy MultidimensionalArraySlice view that lets a rank-N array be walked one dimension at a time - {{grid.[0].[1]}} indexes dimension by dimension, and {{#each}} iterates the outer-most dimension, yielding row/slab slices for the remaining dimensions. Jagged arrays and IList/IEnumerable behavior are unaffected since rank-1 arrays keep using the existing code path.
rexm
enabled auto-merge
August 5, 2026 04:14
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Summary
int[,]) previously threw when indexed via path expressions (Array's non-genericIListindexer rejects rank > 1) or iterated with{{#each}}(cast toT[]failed for non-SZArrays).MultidimensionalArraySliceview that lets a rank-N array be walked one dimension at a time:{{grid.[0].[1]}}indexes dimension by dimension, and{{#each}}iterates the outer-most dimension, yielding row/slab slices for the remaining dimensions (matches how users conceptually think of a 2D array as rows).IList/IEnumerablebehavior are unaffected — rank-1 arrays keep using the existing code path.Test plan
IteratorTests.cs/BasicIntegrationTests.cs: jagged-array regression, 2D#each(including@index), 3D nested#each, 2D/3D path indexingFixes #483
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