Ivan Kylchik
60 lines
1.7 KiB
Kotlin
Vendored
60 lines
1.7 KiB
Kotlin
Vendored
@CompileTimeCalculation
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class A
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@CompileTimeCalculation
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fun notNullAssertion(value: Int?): String {
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return try {
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value!!
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"Value isn't null"
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} catch (e: NullPointerException) {
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"Value is null"
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}
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}
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@CompileTimeCalculation
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fun notNullAssertionForObject(value: A?): String {
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return try {
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value!!
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"Value isn't null"
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} catch (e: NullPointerException) {
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"Value is null"
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}
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}
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@CompileTimeCalculation
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fun notNullAssertionForSomeWrapper(value: StringBuilder?): String {
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return try {
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value!!.toString()
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} catch (e: NullPointerException) {
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"Value is null"
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}
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}
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@CompileTimeCalculation
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fun notNullLambda(lambda: (() -> String)?): String {
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return when {
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lambda != null -> lambda()
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else -> "Lambda is null"
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}
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}
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@CompileTimeCalculation
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fun nullableCast(str: String?): String {
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return try {
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str as String
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} catch (e: NullPointerException) {
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"Null"
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}
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}
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const val a1 = <!EVALUATED: `Value isn't null`!>notNullAssertion(1)<!>
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const val a2 = <!EVALUATED: `Value is null`!>notNullAssertion(null)<!>
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const val b1 = <!EVALUATED: `Value isn't null`!>notNullAssertionForObject(A())<!>
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const val b2 = <!EVALUATED: `Value is null`!>notNullAssertionForObject(null)<!>
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const val c1 = <!EVALUATED: `Some text`!>notNullAssertionForSomeWrapper(StringBuilder("Some text"))<!>
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const val c2 = <!EVALUATED: `Value is null`!>notNullAssertionForSomeWrapper(null)<!>
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const val d1 = <!EVALUATED: `Not null lambda`!>notNullLambda { "Not null lambda" }<!>
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const val d2 = <!EVALUATED: `Lambda is null`!>notNullLambda(null)<!>
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const val e1 = <!EVALUATED: `Not null String`!>nullableCast("Not null String")<!>
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const val e2 = <!EVALUATED: `Null`!>nullableCast(null)<!>
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