Add ATOM primitive type for lightweight symbolic constants#93
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Atoms are colon-prefixed identifiers (:ready, :error, :done) compiled to FNV-1a hash LONGs. They provide type-safe symbolic values without enums, useful for state machines, flags, and message types. Only = and <> comparisons allowed; no arithmetic or type mixing. Supported in variable declarations, SUB parameters, CASE statements, DIM arrays, and struct members. All 220 tests pass with no regressions. Co-Authored-By: Claude Opus 4.6 <[email protected]>
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Atoms are colon-prefixed identifiers (:ready, :error, :done) compiled to FNV-1a hash LONGs. They provide type-safe symbolic values without enums, useful for state machines, flags, and message types. Only = and <> comparisons allowed; no arithmetic or type mixing. Supported in variable declarations, SUB parameters, CASE statements, DIM arrays, and struct members. All 220 tests pass with no regressions.