Brandon Lucas
0b5abece5f
Standard examples (examples/standard/): - hello_world: Basic effect usage - fizzbuzz: Classic programming exercise - factorial: Recursive and tail-recursive versions - primes: Prime number generation - guessing_game: Interactive Random + Console effects - stdlib_demo: Demonstrates List, String, Option, Math modules Showcase examples (examples/showcase/): - ask_pattern: Resumable effects for config/environment - custom_logging: Custom effect with handler - early_return: Fail effect for clean error handling - effect_composition: Combining multiple effects - higher_order: Closures and function composition - pattern_matching: ADTs and exhaustive matching Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
41 lines
1.0 KiB
Plaintext
41 lines
1.0 KiB
Plaintext
// Higher-Order Functions and Closures
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//
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// Functions are first-class values in Lux.
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// Closures capture their environment.
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//
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// Expected output:
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// Square of 5: 25
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// Cube of 3: 27
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// Add 10 to 5: 15
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// Add 10 to 20: 30
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// Composed: 15625 (cube(square(5)) = cube(25) = 15625)
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fn apply(f: fn(Int): Int, x: Int): Int = f(x)
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fn compose(f: fn(Int): Int, g: fn(Int): Int): fn(Int): Int =
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fn(x: Int): Int => f(g(x))
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fn square(n: Int): Int = n * n
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fn cube(n: Int): Int = n * n * n
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fn makeAdder(n: Int): fn(Int): Int =
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fn(x: Int): Int => x + n
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fn main(): Unit with {Console} = {
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// Apply functions
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Console.print("Square of 5: " + toString(apply(square, 5)))
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Console.print("Cube of 3: " + toString(apply(cube, 3)))
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// Closures
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let add10 = makeAdder(10)
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Console.print("Add 10 to 5: " + toString(add10(5)))
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Console.print("Add 10 to 20: " + toString(add10(20)))
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// Function composition
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let squareThenCube = compose(cube, square)
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Console.print("Composed: " + toString(squareThenCube(5)))
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}
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let output = run main() with {}
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