feat(cfc): storage mode (REF= assignment) - #1891
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Problem: The IDE defines a REF= storage mode on data sinks beside Set/Reset, re-pointing a REFERENCE TO sink at its source. The compiler had no such mode, so reference assignments could not be drawn in CFC. Solution: Extend the storage enum with a Reference mode and lower such sinks to `sink REF= source`, reusing the core compiler's reference assignment validation and codegen. An address has no negation, so a negation bubble anywhere on a REF= wire is rejected with E154. Refs: PRG-4533 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Problem: The IDE allows for a
REF=storage mode similar to set/reset (see #1851), the transpiler however does not support that case.Solution: Adapt the data model, support
REF=assignments for data sinks. Transpile such data sinks into a simple<left> REF= <right>assignment and (mostly) rely on the compilers validation for invalid cases.Refs: PRG-4533