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Function object.update

Looks up key; if it exists applies the update delegate else evaluates the create delegate and adds it to the associative array

void update(K, V, C, U) (
  ref V[K] aa,
  K key,
  scope C create,
  scope U update
)
if (isCreateOperation!(C, V) && isUpdateOperation!(U, V));

Parameters

NameDescription
aa The associative array.
key The key.
create The delegate to apply on create.
update The delegate to apply on update.

Authors

Walter Bright, Sean Kelly

License

Boost License 1.0.