Brandon Lucas
f5fe7d5335
- behavioral.lux: use verifiable behavioral patterns (abs for idempotent) - behavioral_types.lux: use simpler verified patterns, proper main invocation - schema_evolution.lux: simplify to runtime schema ops, fix record access - jit_test.lux: add proper main function with console output All examples now parse and run correctly. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
59 lines
2.0 KiB
Plaintext
59 lines
2.0 KiB
Plaintext
// Schema Evolution Demo
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// Demonstrates version tracking using runtime Schema operations
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// ============================================================
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// PART 1: Runtime Schema Operations
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// ============================================================
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// Create versioned values at runtime
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let user1 = Schema.versioned("User", 1, "Alice")
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let user2 = Schema.versioned("User", 2, "Bob")
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// Check versions
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let v1 = Schema.getVersion(user1) // 1
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let v2 = Schema.getVersion(user2) // 2
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// Migrate to newer version (upgrade)
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let upgraded = Schema.migrate(user1, 2)
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let upgradedVersion = Schema.getVersion(upgraded) // 2
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// ============================================================
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// PART 2: Practical Example - API Versioning
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// ============================================================
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// Simulate different API response versions
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fn createResponseV1(data: String): { version: Int, payload: String } =
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{ version: 1, payload: data }
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fn createResponseV2(data: String, timestamp: Int): { version: Int, payload: String, meta: { ts: Int } } =
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{ version: 2, payload: data, meta: { ts: timestamp } }
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// Version-aware processing
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fn getPayload(response: { version: Int, payload: String }): String =
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response.payload
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let resp1 = createResponseV1("Hello")
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let resp2 = createResponseV2("World", 1234567890)
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let payload1 = getPayload(resp1)
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let payload2 = resp2.payload
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// ============================================================
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// RESULTS
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// ============================================================
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fn main(): Unit with {Console} = {
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Console.print("=== Schema Evolution Demo ===")
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Console.print("")
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Console.print("Part 1: Runtime schema operations")
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Console.print(" User v1 version: " + toString(v1))
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Console.print(" User v2 version: " + toString(v2))
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Console.print(" After upgrade: " + toString(upgradedVersion))
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Console.print("")
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Console.print("Part 2: API versioning")
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Console.print(" Response v1 payload: " + payload1)
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Console.print(" Response v2 payload: " + payload2)
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}
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let output = run main() with {}
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