RehashingAA.update

Updates the value for the key key in the internal associative array, invoking the first of the passed delegate to insert a new value if it doesn't exist, or the second selegate to modify it in place if it does.

Note: Doesn't compile with compilers earlier than version 2.088.

struct RehashingAA(AA : V[K], V, K)

static if(__VERSION__ >= 2088L)

void

update

(

)

(

K key

scope V delegate

()

createDg

scope U delegate

(

)

updateDg

)

if (

is(U == V) ||

is(U == void)

)

Parameters

key K: Key.
createDg V delegate (): Delegate to invoke to create a new value if it doesn't exist.
updateDg U delegate ( K ): Delegate to invoke to update an existing value.

Examples

RehashingAA!(int[int]) aa;

assert(1 !in aa);

aa.update(1,
    () => 42,
    (int i) => i + 1);
assert(aa[1] == 42);

aa.update(1,
    () => 42,
    (int i) => i + 1);
assert(aa[1] == 43);