Files
sx/examples/expected
agra c23b76c7d6 lang: const-aggregate comptime folds (PLAN-CONST-AGG step 3)
An array const's '.len' and 'K[<const idx>]' element reads, and a
struct const's field ('LIT.r'), fold as compile-time integer leaves —
usable in array dimensions and other constants' initializers. All
source-aware (the SELECTED author's elements, folded in the author's
context with the cyclic-definition frame); a const out-of-range index
diagnoses at fold time, never wraps.

- evalConstIntExpr gains the three ctx hooks (lookupConstAggLen /
  lookupConstArrayElem / lookupConstStructField) + an index_expr arm;
  all five ctx implementations extended (stateless tiers fold null).
- Array consts dual-register in module_const_map (value = the literal
  node) so the folders see elements; bare reads still hit the GLOBAL
  arm first, so no double emission.
- Untyped consts whose RHS is a const-aggregate leaf ('L :: K.len',
  'E :: K[1]', 'R :: LIT.r') register in a pass 2b AFTER aggregates,
  gated on the receiver naming a const aggregate — a namespaced member
  ('F :: m.PI_ISH') is never mis-typed by the count placeholder.

Examples: 0179 (folds in dims + const exprs), 1163 (OOB diagnostic).
2026-06-11 12:44:43 +03:00
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