79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
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#ifndef __expression_H
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#define __expression_H
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/*
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* Copyright (c) 2011 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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# include "StringHeap.h"
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# include "LineInfo.h"
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/*
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* The Expression class represents parsed expressions from the parsed
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* VHDL input. The Expression class is a virtual class that holds more
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* specific derived expression types.
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*/
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class Expression : public LineInfo {
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public:
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Expression();
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virtual ~Expression() =0;
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virtual void dump(ostream&out, int indent) const;
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private:
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private: // Not implemented
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Expression(const Expression&);
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Expression& operator = (const Expression&);
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};
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class ExpLogical : public Expression {
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public:
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enum fun_t { AND, OR, NAND, NOR, XOR, XNOR };
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public:
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ExpLogical(ExpLogical::fun_t ty, Expression*op1, Expression*op2);
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~ExpLogical();
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void dump(ostream&out, int indent) const;
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private:
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fun_t fun_;
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Expression*operand1_;
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Expression*operand2_;
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};
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/*
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* The ExpName class represents an expression that is an identifier or
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* other sort of name.
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*/
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class ExpName : public Expression {
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public:
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ExpName(perm_string nn);
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~ExpName();
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void dump(ostream&out, int indent) const;
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private:
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perm_string name_;
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};
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#endif
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