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/*
* rewriter_attributes.h
*
* Created on: Dec 27, 2010
* Author: dejan
*/
#pragma once
namespace CVC4 {
namespace theory {
template <bool pre, theory::TheoryId theoryId>
struct RewriteCacheTag {};
template <theory::TheoryId theoryId>
struct RewriteAttibute {
typedef expr::Attribute< RewriteCacheTag<true, theoryId>, Node> pre_rewrite;
typedef expr::Attribute< RewriteCacheTag<false, theoryId>, Node> post_rewrite;
/**
* Get the value of the pre-rewrite cache.
*/
static Node getPreRewriteCache(TNode node) throw() {
Node cache;
if (node.hasAttribute(pre_rewrite())) {
node.getAttribute(pre_rewrite(), cache);
} else {
return Node::null();
}
if (cache.isNull()) {
return node;
} else {
return cache;
}
}
/**
* Set the value of the pre-rewrite cache.
*/
static void setPreRewriteCache(TNode node, TNode cache) throw() {
Debug("rewriter") << "setting pre-rewrite of " << node << " to " << cache << std::endl;
Assert(!cache.isNull());
if (node == cache) {
node.setAttribute(pre_rewrite(), Node::null());
} else {
node.setAttribute(pre_rewrite(), cache);
}
}
/**
* Get the value of the post-rewrite cache.
* none).
*/
static Node getPostRewriteCache(TNode node) throw() {
Node cache;
if (node.hasAttribute(post_rewrite())) {
node.getAttribute(post_rewrite(), cache);
} else {
return Node::null();
}
if (cache.isNull()) {
return node;
} else {
return cache;
}
}
/**
* Set the value of the post-rewrite cache. v cannot be a null Node.
*/
static void setPostRewriteCache(TNode node, TNode cache) throw() {
Assert(!cache.isNull());
Debug("rewriter") << "setting rewrite of " << node << " to " << cache << std::endl;
if (node == cache) {
node.setAttribute(post_rewrite(), Node::null());
} else {
node.setAttribute(post_rewrite(), cache);
}
}
};
} // Namespace CVC4
} // Namespace theory
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