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package ego
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Module type Generic.RULESource
This module type RULE defines the rewrite interface for an EGraph, allowing users to express relatively complex transformations of expressions over some language.
Represents a pattern over the language of the EGraph - it can either be used to match and bind a particular subpattern in an expression, or can be used to express the output schema for a rewrite.
make_constant ~from ~into creates a rewrite rule from a pattern from into a schema into that applies a purely syntactic transformation.
val make_conditional :
from:query ->
into:query ->
cond:(rw egraph -> Id.t -> Id.t StringMap.t -> bool) ->
tmake_conditional ~from ~into ~cond creates a syntactic rewrite rule from from to into that is conditionally applied based on some property cond of the EGraph, the root eclass of the sub-expression being transformed and the eclasses of all bound variables.
val make_dynamic :
from:query ->
generator:(rw egraph -> Id.t -> Id.t StringMap.t -> query option) ->
tmake_dynamic ~from ~generator creates a dynamic rewrite rule from a pattern from into a schema that is conditionally generated based on properties of the EGraph, the root eclass of the sub-expression being transformed and the eclasses of all bound variables