Brandon Lucas
15a820a467
- Add string concatenation support to + operator in typechecker - Register ADT constructors in both type environment and interpreter - Bind handlers as values so they can be referenced in run...with - Fix effect checking to use subset instead of exact match - Add built-in effects (Console, Fail, State) to run block contexts - Suppress dead code warnings in diagnostics, modules, parser Update all example programs with: - Expected output documented in comments - Proper run...with statements to execute code Add new example programs: - behavioral.lux: pure, idempotent, deterministic, commutative functions - pipelines.lux: pipe operator demonstrations - statemachine.lux: ADT-based state machines - tailcall.lux: tail call optimization examples - traits.lux: type classes and pattern matching Add documentation: - docs/IMPLEMENTATION_PLAN.md: feature roadmap and status - docs/PERFORMANCE_AND_TRADEOFFS.md: performance analysis Add benchmarks for performance testing. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
37 lines
877 B
Plaintext
37 lines
877 B
Plaintext
// Demonstrating algebraic effects in Lux
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//
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// Expected output:
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// [info] Processing data...
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// [debug] Result computed
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// Final result: 42
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// Define a custom logging effect
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effect Logger {
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fn log(level: String, msg: String): Unit
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fn getLevel(): String
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}
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// A function that uses the Logger effect
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fn processData(data: Int): Int with {Logger} = {
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Logger.log("info", "Processing data...")
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let result = data * 2
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Logger.log("debug", "Result computed")
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result
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}
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// A handler that prints logs to console
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handler consoleLogger: Logger {
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fn log(level, msg) = Console.print("[" + level + "] " + msg)
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fn getLevel() = "debug"
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}
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// Run and print
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fn main(): Unit with {Console} = {
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let result = run processData(21) with {
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Logger = consoleLogger
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}
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Console.print("Final result: " + toString(result))
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}
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let output = run main() with {}
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