# package ocaml-base-compiler

Result structures approximately follow the evaluation order of the program. They are returned by the simplification algorithm acting on an Flambda subexpression.

`val create : unit -> t`

`val approx : t -> Simple_value_approx.t`

The approximation of the subexpression that has just been simplified.

`val set_approx : t -> Simple_value_approx.t -> t`

Set the approximation of the subexpression that has just been simplified. Typically used just before returning from a case of the simplification algorithm.

`val meet_approx : t -> Env.t -> Simple_value_approx.t -> t`

Set the approximation of the subexpression to the meet of the current return approximation and the provided one. Typically used just before returning from a branch case of the simplification algorithm.

`val used_static_exceptions : t -> Static_exception.Set.t`

All static exceptions for which `use_staticfail`

has been called on the given result structure.

`val use_static_exception : t -> Static_exception.t -> t`

Mark that the given static exception has been used.

`val exit_scope_catch : t -> Static_exception.t -> t`

Mark that we are moving up out of the scope of a static-catch block that catches the given static exception identifier. This has the effect of removing the identifier from the `used_staticfail`

set.

`val benefit : t -> Inlining_cost.Benefit.t`

The benefit to be gained by inlining the subexpression whose simplification yielded the given result structure.

```
val map_benefit :
t ->
(Inlining_cost.Benefit.t -> Inlining_cost.Benefit.t) ->
t
```

Apply a transformation to the inlining benefit stored within the given result structure.

`val add_benefit : t -> Inlining_cost.Benefit.t -> t`

Add some benefit to the inlining benefit stored within the given result structure.

Set the benefit of inlining the subexpression corresponding to the given result structure to zero.

`val set_inlining_threshold : t -> Inlining_cost.Threshold.t option -> t`

`val add_inlining_threshold : t -> Inlining_cost.Threshold.t -> t`

`val sub_inlining_threshold : t -> Inlining_cost.Threshold.t -> t`

`val inlining_threshold : t -> Inlining_cost.Threshold.t option`

`val num_direct_applications : t -> int`