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[pccts] / h / ASTBase.h

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+/* Abstract syntax tree
+ *
+ * SOFTWARE RIGHTS
+ *
+ * We reserve no LEGAL rights to the Purdue Compiler Construction Tool
+ * Set (PCCTS) -- PCCTS is in the public domain.  An individual or
+ * company may do whatever they wish with source code distributed with
+ * PCCTS or the code generated by PCCTS, including the incorporation of
+ * PCCTS, or its output, into commerical software.
+ * 
+ * We encourage users to develop software with PCCTS.  However, we do ask
+ * that credit is given to us for developing PCCTS.  By "credit",
+ * we mean that if you incorporate our source code into one of your
+ * programs (commercial product, research project, or otherwise) that you
+ * acknowledge this fact somewhere in the documentation, research report,
+ * etc...  If you like PCCTS and have developed a nice tool with the
+ * output, please mention that you developed it using PCCTS.  In
+ * addition, we ask that this header remain intact in our source code.
+ * As long as these guidelines are kept, we expect to continue enhancing
+ * this system and expect to make other tools available as they are
+ * completed.
+ *
+ * ANTLR 1.33
+ * Terence Parr
+ * Parr Research Corporation
+ * with Purdue University and AHPCRC, University of Minnesota
+ * 1989-1995
+ */
+
+#ifndef ASTBase_H
+#define ASTBase_H
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "PCCTSAST.h"
+
+/*
+ * Notes:
+ *
+ * To specify a copy constructor, subclass one of these classes and
+ * give the copy constructor.  To use dup(), you must define shallowCopy().
+ * shallowCopy() can use either a copy constructor or just copy the node
+ * itself.
+ */
+
+class ASTBase : public PCCTS_AST {
+protected:
+       ASTBase *_right, *_down;
+
+public:
+       PCCTS_AST *right()      { return _right; }      // define the SORCERER interface
+       PCCTS_AST *down()       { return _down; }
+       void setRight(PCCTS_AST *t)     { _right = (ASTBase *)t; }
+       void setDown(PCCTS_AST *t)      { _down = (ASTBase *)t; }
+
+       ASTBase() { _right = _down = NULL; }
+       virtual ~ASTBase() { ; }
+       virtual ASTBase *dup();
+       void destroy();
+       void preorder();
+       static ASTBase *tmake(ASTBase *, ...);
+       static void link(ASTBase **, ASTBase **, ASTBase **);
+       void subchild(ASTBase **, ASTBase **, ASTBase **);
+       void subroot(ASTBase **, ASTBase **, ASTBase **);
+       virtual void preorder_action() { ; }
+       virtual void preorder_before_action() { printf(" ("); }
+       virtual void preorder_after_action() { printf(" )"); }
+};
+
+class ASTDoublyLinkedBase : public ASTBase {
+protected:
+       ASTDoublyLinkedBase *_left, *_up;
+
+public:
+       void double_link(ASTBase *left, ASTBase *up);
+       virtual ASTBase *dup();
+       PCCTS_AST *left() { return _left; }
+       PCCTS_AST *up() { return _up; }
+};
+
+class AST;     // announce that this class will be coming along shortly
+#endif