Dmitriy Novozhilov
105 lines
2.2 KiB
Kotlin
Vendored
105 lines
2.2 KiB
Kotlin
Vendored
// !LANGUAGE: +AllowContractsForCustomFunctions +UseReturnsEffect
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// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
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// !DIAGNOSTICS: -INVISIBLE_REFERENCE -INVISIBLE_MEMBER
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// !WITH_NEW_INFERENCE
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import kotlin.contracts.*
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fun myAssert(condition: Boolean) {
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contract {
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returns() implies (condition)
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}
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if (!condition) throw kotlin.IllegalArgumentException("Assertion failed")
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}
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fun isString(x: Any?): Boolean {
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contract {
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returns(true) implies (x is String)
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}
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return x is String
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}
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fun isInt(x: Any?): Boolean {
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contract {
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returns(true) implies (x is Int)
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}
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return x is Int
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}
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fun notEqualsNull(x: Any?): Boolean {
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contract {
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returns(true) implies (x != null)
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}
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return x != null
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}
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fun equalsTrue(x: Boolean): Boolean {
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contract {
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returns(true) implies x
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}
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return x == true
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}
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fun nullWhenNotString(x: Any?): String? {
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contract {
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returnsNotNull() implies (x is String)
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}
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return x as? String
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}
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// ========== Actual tests ============
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fun nested1(x: Any?) {
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if (equalsTrue(isString(x))) {
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x.length
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}
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else {
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x.<!UNRESOLVED_REFERENCE!>length<!>
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}
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}
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fun nested2(x: Any?) {
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myAssert(equalsTrue(isString(x)))
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x.length
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}
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fun nested3(x: Any?) {
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myAssert(equalsTrue(notEqualsNull(nullWhenNotString(x))))
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x.<!UNRESOLVED_REFERENCE!>length<!>
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}
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fun branchedAndNested(x: Any?, y: Any?) {
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myAssert(equalsTrue(notEqualsNull(nullWhenNotString(x))) && equalsTrue(isString(y)))
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x.<!UNRESOLVED_REFERENCE!>length<!>
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y.length
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}
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fun br(y: Any?) {
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if (myAssert(y is Int) == Unit && myAssert(y is String) == Unit) {
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y.length
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y.inc()
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}
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}
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fun branchedAndNestedWithNativeOperators(x: Any?, y: Any?) {
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myAssert(
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equalsTrue(notEqualsNull(nullWhenNotString(x))) // x is String
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&&
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(
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(myAssert(y is Int) == Unit && myAssert(y is String) == Unit) // y is Int, String
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||
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equalsTrue(isInt(y) && isString(y)) // y is Int, String
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)
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&&
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(1 == 2 || y is Int || isString(y))
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)
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x.<!UNRESOLVED_REFERENCE!>length<!>
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y.length
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y.inc()
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}
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