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package eff
apply a function to an Eff value using the applicative instance
apply a function to an Eff value using the applicative instance
get the environment
get the environment
try to execute an action an report any issue
try to execute an action an report any issue
catch possible left values
catch possible left values
Attempt to execute a safe action including finalizers
Attempt to execute a safe action including finalizers
get a resource A and use it.
get a resource A and use it. Call the release function whether an exception is thrown or not when using the resource
NOTE: Eff interpreters are independent so if there is an effect short-circuiting all computations inside 'use', like Option or Either then the release function will not be called. If you want to make sure that the release function is always called "at the end of the world and whatever happens" you need to call Eff.bracketLast
bracket an action with one last action to execute at the end of the program
bracket an action with one last action to execute at the end of the program
catch and handle a possible left value
catch and handle a possible left value
catch and handle a possible left value.
catch and handle a possible left value. The value is the combination of all failures in case of an applicative
create an Either effect from a value possibly throwing a Throwable
create an Either effect from a value possibly throwing a Throwable
evaluate first action possibly having error effects
evaluate first action possibly having error effects
Execute a second action if the first one is not successful, based on the error
catch and handle possible wrong values
catch and handle possible wrong values
use the internal effect as one of the stack effects
use the internal effect as one of the stack effects
create a correct value
create a correct value
peel-off the only present effect
peel-off the only present effect
peel-off the only present effect
peel-off the only present effect
peel-off the only present effect, using an Applicative instance where possible
peel-off the only present effect, using an Applicative instance where possible
peel-off the only present effect, using an Applicative instance where possible
peel-off the only present effect, using an Applicative instance where possible
An Eff[R, A] value can be transformed into an Eff[U, A] value provided that all the effects in R are also in U
An Eff[R, A] value can be transformed into an Eff[U, A] value provided that all the effects in R are also in U
Monad implementation for the Eff[R, ?] type
Monad implementation for the Eff[R, ?] type
create a list effect with no values
create a list effect with no values
run a state effect, with an initial value, return only the value
run a state effect, with an initial value, return only the value
run a state effect, with a Monoidal state
run a state effect, with a Monoidal state
run a safe effect but drop the finalizer errors
run a safe effect but drop the finalizer errors
run a state effect, with an initial value, return only the state
run a state effect, with an initial value, return only the state
run a state effect, with a monoidal state, return only the state
run a state effect, with a monoidal state, return only the state
use the applicative instance of Eff to sequence a list of values, then flatten it
use the applicative instance of Eff to sequence a list of values, then flatten it
use the applicative instance of Eff to traverse a list of values, then flatten it
use the applicative instance of Eff to traverse a list of values, then flatten it
create an Either effect from a value possibly throwing an exception
create an Either effect from a value possibly throwing an exception
create an Either effect from a single Either value
create an Either effect from a single Either value
create a list effect from a list of values
create a list effect from a list of values
create an Option effect from a single Option value
create an Option effect from a single Option value
get the current state value
get the current state value
get the current state value and map it with a function f
get the current state value and map it with a function f
ignore one possible exception that could be thrown
ignore one possible exception that could be thrown
create a delayed impure value
create a delayed impure value
create a delayed impure value
create a delayed impure value
create a impure value from an union of effects and a continuation
create a impure value from an union of effects and a continuation
create a failed value
create a failed value
Lift a computation over a "small" state (for a subsystem) into a computation over a "bigger" state (for the full application state)
Lift a computation over a "small" state (for a subsystem) into a computation over a "bigger" state (for the full application state)
modify the environment
modify the environment
Update the error value, the stack of the Eff computation stays the same
Update the error value, the stack of the Eff computation stays the same
Update the read value, the stack of the Eff computation stays the same
Update the read value, the stack of the Eff computation stays the same
Update the state value, the stack of the Eff computation stays the same
Update the state value, the stack of the Eff computation stays the same
Memoize an effect using a cache
Memoize an effect using a cache
all the consecutive effects M[X] leading to the computation of Eff[R, A] will be cached in the cache and retrieved from there if the Eff[R, A] computation is executed again
modify the current state value
modify the current state value
no value returned
no value returned
create an Either effect from a single Option value
create an Either effect from a single Option value
evaluate first action possibly having exceptions
evaluate first action possibly having exceptions
Execute a second action if the first one is not successful
create a pure value
create a pure value
store a new state value
store a new state value
evaluate first action possibly having error effects
evaluate first action possibly having error effects
Execute a second action if the first one is not successful and second is defined for the error
create a correct value
create a correct value
base runner for an Eff value having no effects at all the execution is trampolined using Eval
base runner for an Eff value having no effects at all the execution is trampolined using Eval
run the Either effect, yielding E Either A
run the Either effect, yielding E Either A
run the Either effect, handling E (with effects) and yielding A
run the Either effect, handling E (with effects) and yielding A
run the Either effect, yielding E Either A and combine all Es
run the Either effect, yielding E Either A and combine all Es
run an effect stack starting with a list effect
run an effect stack starting with a list effect
run the validate effect, yielding a list of failures Either A
run the validate effect, yielding a list of failures Either A
run the validate effect, yielding a non-empty list of failures Either A
run the validate effect, yielding a non-empty list of failures Either A
Interpret the Option effect
Interpret the Option effect
Stop all computations if None is present once
get the pure value if there is no effect
get the pure value if there is no effect
interpret the Reader effect by providing an environment when required
interpret the Reader effect by providing an environment when required
Run a safe effect
Run a safe effect
Collect finalizer exceptions if any
run a state effect, with an initial value
run a state effect, with an initial value
run a state effect, with an initial value
run a state effect, with an initial value
run the validate effect, yielding a ValidatedNel
run the validate effect, yielding a ValidatedNel
run a writer effect and return the list of written values
run a writer effect and return the list of written values
This uses a ListBuffer internally to append values
More general fold of runWriter where we can use a fold to accumulate values in a mutable buffer
More general fold of runWriter where we can use a fold to accumulate values in a mutable buffer
Run a side-effecting fold
Run a side-effecting fold
create an Eff[R, A] value from an effectful value of type T[V] provided that T is one of the effects of R
create an Eff[R, A] value from an effectful value of type T[V] provided that T is one of the effects of R
use the applicative instance of Eff to sequence a list of values
use the applicative instance of Eff to sequence a list of values
create a list effect from a single value
create a list effect from a single value
a value is returned
a value is returned
write a given value
write a given value
evaluate first action possibly having error effects execute a second action whether the first is successful or not but keep track of finalizer exceptions
evaluate first action possibly having error effects execute a second action whether the first is successful or not but keep track of finalizer exceptions
Translate an error effect to another one in the same stack a computation over a "bigger" error (for the full application)
Translate an error effect to another one in the same stack a computation over a "bigger" error (for the full application)
Interpret a Reader effect by using another Reader effect in the same stack
Interpret a Reader effect by using another Reader effect in the same stack
use the applicative instance of Eff to traverse a list of values
use the applicative instance of Eff to traverse a list of values
create an Eff value for ()
create an Eff value for ()
check a correct condition
check a correct condition
create an Validate effect from a single Either value
create an Validate effect from a single Either value
create an Validate effect from a single Option value
create an Validate effect from a single Option value
check a correct value
check a correct value
create a list effect from a list of values
create a list effect from a list of values
evaluate first action possibly throwing exceptions
evaluate first action possibly throwing exceptions
Execute a second action if the first one is not successful, based on the exception
The final value type is the same as the original type
attach a clean-up action to the continuation (if any)
attach a clean-up action to the continuation (if any)
evaluate first action possibly throwing exceptions
evaluate first action possibly throwing exceptions
Execute a second action if the first one is not successful and second is defined for the error
The final value type is the same as the original type
create a failed value
create a failed value
Modify the type of the read value
Modify the type of the read value
This changes the stack of the Eff computation
Modify the type of the read value
Modify the type of the read value
This changes the stack of the Eff computation