Added a Redis/Valkey extension named redis. (0.42.0)

examples/extensions/redis/README.md

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+Redis extension examples (hiredis)
+
+This folder contains small Fun scripts that demonstrate how to use the Redis extension.
+
+Prerequisites
+- Build Fun with Redis support enabled (FUN_WITH_REDIS=ON). This is ON by default in cmake/Extensions/REDIS.cmake.
+- A Redis-compatible server reachable at 127.0.0.1:6379.
+
+How to run
+- Using the Fun CLI from the repository root:
+  - Debug profile path: build_debug/fun
+  - Release profile path: build_release/fun
+
+Examples
+1. basic_ping.fun
+   - Connects, PINGs, then closes.
+
+2. kv_set_get.fun
+   - SET/GET, EXISTS and DEL for a demo key.
+
+3. list_ops.fun
+   - Demonstrates LPUSH and LRANGE on a list.
+
+4. hash_ops.fun
+   - Demonstrates HSET, HGET and HGETALL on a hash.
+
+Note
+- All examples use direct inline command strings with redis_cmd(handle, "COMMAND args...").
+- Close the connection with redis_close(handle) when finished.

examples/extensions/redis/basic_ping.fun

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+#!/usr/bin/env fun
+
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2026-06-03
+ */
+
+/*
+ * Simple Redis test using Fun builtins backed by hiredis.
+ *
+ * Basic PING
+ */
+
+h = redis_connect('127.0.0.1', 6379)
+
+print('handle type: ' + typeof(h))
+
+print(redis_cmd(h, 'PING'))
+
+redis_close(h)

examples/extensions/redis/hash_ops.fun

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+#!/usr/bin/env fun
+
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2026-06-03
+ */
+
+/*
+ * Simple Redis test using Fun builtins backed by hiredis.
+ * 
+ * Hash operations (HSET/HGET/HGETALL)
+ */
+
+h = redis_connect('127.0.0.1', 6379)
+key = 'fun:examples:redis:hash:user1'
+
+// Start fresh
+_ = redis_cmd(h, 'DEL ' + key)
+
+// Set a couple of fields
+print(redis_cmd(h, 'HSET ' + key + ' name Alice'))
+print(redis_cmd(h, 'HSET ' + key + ' age 30'))
+
+// Fetch a single field
+print('HGET name -> ' + redis_cmd(h, 'HGET ' + key + ' name'))
+
+// Fetch all fields (returns a flat array [field, value, field, value, ...])
+all = redis_cmd(h, 'HGETALL ' + key)
+print('HGETALL ->')
+print(all)
+
+redis_close(h)

examples/extensions/redis/kv_set_get.fun

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+#!/usr/bin/env fun
+
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2026-06-03
+ */
+
+/*
+ * Simple Redis test using Fun builtins backed by hiredis. 
+ *
+ * Simple key/value set-get-delete
+ */
+
+h = redis_connect('127.0.0.1', 6379)
+key = 'fun:examples:redis:key'
+
+// Clean slate
+_ = redis_cmd(h, 'DEL ' + key)
+
+// Set and get
+print(redis_cmd(h, 'SET ' + key + ' 42'))
+print('GET -> ' + redis_cmd(h, 'GET ' + key))
+
+// Check existence
+print('EXISTS -> ' + to_string(redis_cmd(h, 'EXISTS ' + key)))
+
+// Delete
+print('DEL -> ' + to_string(redis_cmd(h, 'DEL ' + key)))
+print('EXISTS(after DEL) -> ' + to_string(redis_cmd(h, 'EXISTS ' + key)))
+
+redis_close(h)

examples/extensions/redis/list_ops.fun

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+#!/usr/bin/env fun
+
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2026-06-03
+ */
+
+/*
+ * Simple Redis test using Fun builtins backed by hiredis. 
+ *
+ * List operations (LPUSH/LRANGE)
+ */
+
+h = redis_connect('127.0.0.1', 6379)
+key = 'fun:examples:redis:list'
+
+// Start fresh
+_ = redis_cmd(h, 'DEL ' + key)
+
+// Push some values to the left
+print(redis_cmd(h, 'LPUSH ' + key + ' a'))
+print(redis_cmd(h, 'LPUSH ' + key + ' b'))
+print(redis_cmd(h, 'LPUSH ' + key + ' c'))
+
+// Read entire list
+vals = redis_cmd(h, 'LRANGE ' + key + ' 0 -1')
+print('LRANGE 0 -1 -> ')
+print(vals)
+
+redis_close(h)

examples/extensions/redis/redis_test.fun

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+#!/usr/bin/env fun
+
+/*
+ * This file is part of the Fun programming language.
+ * https://fun-lang.xyz/
+ *
+ * Copyright 2025 Johannes Findeisen <you@hanez.org>
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2026-06-03
+ */
+
+/*
+ * Simple Redis test using Fun builtins backed by hiredis.
+ */
+
+h = redis_connect('127.0.0.1', 6379)
+
+print(typeof(h))
+
+print(redis_cmd(h, 'PING'))
+
+_ = redis_cmd(h, 'SET fun_demo_key 42')
+
+print(redis_cmd(h, 'GET fun_demo_key'))
+
+redis_close(h)