| // OPT_IN: kotlin.contracts.ExperimentalContracts |
| |
| import kotlin.contracts.* |
| |
| inline fun <T> exactlyOnce(block: () -> T): T { |
| contract { callsInPlace(block, InvocationKind.EXACTLY_ONCE) } |
| return block() |
| } |
| |
| inline fun <T> atLeastOnce(block: () -> T): T { |
| contract { callsInPlace(block, InvocationKind.AT_LEAST_ONCE) } |
| return block() |
| } |
| |
| inline fun <T> atMostOnce(block: () -> T): T { |
| contract { callsInPlace(block, InvocationKind.AT_MOST_ONCE) } |
| return block() |
| } |
| |
| val a: String |
| exactlyOnce { <!VAL_REASSIGNMENT!>a<!> = "" } |
| a.length |
| |
| val b: String |
| atLeastOnce { <!VAL_REASSIGNMENT, VAL_REASSIGNMENT!>b<!> = "" } |
| b.length |
| |
| <!MUST_BE_INITIALIZED!>val c: String<!> |
| atMostOnce { <!VAL_REASSIGNMENT!>c<!> = "" } |
| <!UNINITIALIZED_VARIABLE!>c<!>.length |
