53 lines
1.2 KiB
Kotlin
53 lines
1.2 KiB
Kotlin
// version 1.0.6
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data class IfBoth(val cond1: Boolean, val cond2: Boolean) {
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fun elseFirst(func: () -> Unit): IfBoth {
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if (cond1 && !cond2) func()
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return this
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}
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fun elseSecond(func: () -> Unit): IfBoth {
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if (cond2 && !cond1) func()
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return this
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}
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fun elseNeither(func: () -> Unit): IfBoth {
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if (!cond1 && !cond2) func()
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return this // in case it's called out of order
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}
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}
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fun ifBoth(cond1: Boolean, cond2: Boolean, func: () -> Unit): IfBoth {
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if (cond1 && cond2) func()
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return IfBoth(cond1, cond2)
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}
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fun main(args: Array<String>) {
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var a = 0
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var b = 1
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ifBoth (a == 1, b == 3) {
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println("a = 1 and b = 3")
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}
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.elseFirst {
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println("a = 1 and b <> 3")
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}
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.elseSecond {
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println("a <> 1 and b = 3")
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}
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.elseNeither {
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println("a <> 1 and b <> 3")
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}
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// It's also possible to omit any (or all) of the 'else' clauses or to call them out of order
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a = 1
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b = 0
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ifBoth (a == 1, b == 3) {
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println("a = 1 and b = 3")
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}
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.elseNeither {
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println("a <> 1 and b <> 3")
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}
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.elseFirst {
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println("a = 1 and b <> 3")
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}
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}
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