Meta.h

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/*
 * Souffle - A Datalog Compiler
 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved
 * Licensed under the Universal Permissive License v 1.0 as shown at:
 * - https://opensource.org/licenses/UPL
 * - <souffle root>/licenses/SOUFFLE-UPL.txt
 */
 
/************************************************************************
 *
 * @file Meta.h
 *
 * Defines the interface for AST meta-transformation passes.
 *
 ***********************************************************************/
 
#pragma once
 
#include "ast/TranslationUnit.h"
#include "ast/transform/Transformer.h"
#include <set>
#include <string>
#include <vector>
 
namespace souffle::ast::transform {
 
/**
 * Transformer that coordinates other sub-transformations
 */
class MetaTransformer : public Transformer {
protected:
    bool verbose = false;
 
public:
    /* Get subtransformers */
    virtual std::vector<Transformer*> getSubtransformers() const = 0;
 
    /* Enable the debug-report for all sub-transformations */
    virtual void setDebugReport() = 0;
 
    /* Enable high verbosity */
    virtual void setVerbosity(bool verbose) = 0;
 
    /* Disable subtransformers */
    virtual void disableTransformers(const std::set<std::string>& transforms) = 0;
 
    /* Apply a nested transformer */
    bool applySubtransformer(TranslationUnit& translationUnit, Transformer* transformer);
 
    MetaTransformer* clone() const override = 0;
};
 
}  // namespace souffle::ast::transform