75 lines
1.9 KiB
Standard ML
Executable file
75 lines
1.9 KiB
Standard ML
Executable file
#!/usr/bin/env fun
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/*
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* This file is part of the Fun programming language.
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* https://fun-lang.xyz/
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*
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* Copyright 2025 Johannes Findeisen <you@hanez.org>
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* Licensed under the terms of the Apache-2.0 license.
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* https://opensource.org/license/apache-2-0
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*
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* Added: 2025-10-04
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*/
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// Boolean datatype usage examples (first-class booleans)
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// Run like:
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// FUN_LIB_DIR="$(pwd)/lib" ./build/fun examples/basics/booleans.fun
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// Literals
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boolean t = true
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print("typeof(t) => " + typeof(t))
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boolean f = false
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print("typeof(f) => " + typeof(f))
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print("t literal => " + to_string(t)) // "true"
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print("f literal => " + to_string(f)) // "false"
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// Logical operators (short-circuit semantics)
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print("true && true => " + to_string(true && true))
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print("true && false => " + to_string(true && false))
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print("false || true => " + to_string(false || true))
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print("false || false => " + to_string(false || false))
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print("!true => " + to_string(!true))
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print("!false => " + to_string(!false))
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// Equality and inequality
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print("true == true => " + to_string(true == true))
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print("true != false => " + to_string(true != false))
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// Interoperability with 0/1 (still supported)
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print("true == 1 => " + to_string(true == 1))
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print("false == 0 => " + to_string(false == 0))
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print("1 == true => " + to_string(1 == true))
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print("0 != true => " + to_string(0 != true))
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// Use in conditionals
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if t
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print("if t: branch taken")
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else
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print("if t: branch NOT taken")
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if f
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print("if f: branch taken (unexpected)")
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else
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print("if f: else branch taken")
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/* Expected output:
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typeof(t) => Boolean
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typeof(f) => Boolean
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t literal => true
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f literal => false
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true && true => true
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true && false => false
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false || true => 1
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false || false => 0
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!true => false
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!false => true
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true == true => true
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true != false => true
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true == 1 => true
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false == 0 => true
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1 == true => true
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0 != true => true
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if t: branch taken
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if f: else branch taken
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*/
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