Merge pull request #22 from Arkiv-Network/rvdp/pr

Add evaluator interface

Author: r-vdp

query/evaluate.go

@@ -0,0 +1,9 @@
+package query
+
+type QueryEvaluator interface {
+	EvaluateAST(ast *AST, options *QueryOptions) (*SelectQuery, error)
+}
+
+func (t *AST) Evaluate(options *QueryOptions, evaluator QueryEvaluator) (*SelectQuery, error) {
+	return evaluator.EvaluateAST(t, options)
+}