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/****************************************************************************** |
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* Top contributors (to current version): |
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* Andrew Reynolds |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Term context. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__EXPR__TERM_CONTEXT_STACK_H |
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#define CVC5__EXPR__TERM_CONTEXT_STACK_H |
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#include "expr/term_context_node.h" |
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namespace cvc5 { |
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/** |
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* A stack for term-context-sensitive terms. Its main advantage is that |
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* it does not rely on explicit construction of TCtxNode for efficiency. |
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*/ |
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class TCtxStack |
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{ |
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public: |
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TCtxStack(const TermContext* tctx); |
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virtual ~TCtxStack() {} |
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/** Push t to the stack */ |
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void pushInitial(Node t); |
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/** |
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* Push all children of t to the stack, where tval is the term context hash |
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* of t. */ |
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void pushChildren(Node t, uint32_t tval); |
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/** |
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* Push the child of t with the given index to the stack, where tval is |
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* the term context hash of t. |
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*/ |
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void pushChild(Node t, uint32_t tval, size_t index); |
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/** |
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* Push the operator of t to the stack, where tval is the term context has |
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* of t. |
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*/ |
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void pushOp(Node t, uint32_t tval); |
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/** Push t to the stack with term context hash tval. */ |
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void push(Node t, uint32_t tval); |
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/** Pop a term from the context */ |
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void pop(); |
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/** Clear the stack */ |
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void clear(); |
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/** Return the size of the stack */ |
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size_t size() const; |
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/** Return true if the stack is empty */ |
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bool empty() const; |
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/** Get the current stack element */ |
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std::pair<Node, uint32_t> getCurrent() const; |
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/** Get the current stack element, node version */ |
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TCtxNode getCurrentNode() const; |
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private: |
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/** The stack */ |
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std::vector<std::pair<Node, uint32_t>> d_stack; |
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/** The term context */ |
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const TermContext* d_tctx; |
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}; |
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} // namespace cvc5 |
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#endif /* CVC5__EXPR__TERM_CONTEXT_STACK_H */ |