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fun/examples/snippets/include_namespace.fun

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Standard ML
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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: 2025-09-30
*/
// Demonstration of the include-as namespace feature.
//
// Run examples (without installing) by pointing FUN_LIB_DIR to the repo lib:
// Linux/macOS/FreeBSD:
// FUN_LIB_DIR="$(pwd)/lib" ./build/fun examples/snippets/include_namespace.fun
// Windows (CMD):
// set FUN_LIB_DIR=%CD%\lib && build-debug\fun.exe examples\snippets\include_namespace.fun
// Windows (PowerShell):
// $env:FUN_LIB_DIR="$PWD\lib"; .\build\fun.exe examples\snippets\include_namespace.fun
// Import stdlib math helpers into alias 'm'
#include <utils/math.fun> as m
// Import a local module (this repository file) into alias 'mod'
#include "examples/namespaced_mod.fun" as mod
print("=== include-as namespace demo ===")
print("Using m.add and m.times from <utils/math.fun>:")
print("m.add(2, 3) = " + to_string(m.add(2, 3)))
print("m.times(4, 5) = " + to_string(m.times(4, 5)))
print("")
print("Using mod.hello and mod.Greeter from namespaced_mod.fun:")
print(mod.hello("Fun"))
g = mod.Greeter("Hi")
g.say("World")
print("")
print("=== done ===")
/* Expected output:
=== include-as namespace demo ===
Using m.add and m.times from <utils/math.fun>:
m.add(2, 3) = 5
m.times(4, 5) = 20
Using mod.hello and mod.Greeter from namespaced_mod.fun:
Hello, Fun!
Hi World
=== done ===
*/