runST is:exact
Return the value computed by a state thread. The
forall
ensures that the internal state used by the
ST computation is
inaccessible to the rest of the program.
Return the value computed by an
ST computation. The
forall ensures that the internal state used by the
ST
computation is inaccessible to the rest of the program.
run an arrow with augmented state in the context of a simple state
arrow. An initial value for the new state component is needed.
This is useful, when running an arrow with an extra environment
component, e.g. for namespace handling in XML.
Deprecated: Use runSTT instead
Return the value computed by a state transformer computation. The
forall ensures that the internal state used by the
ST
computation is inaccessible to the rest of the program.