79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*
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* Author: Ceriel J.H. Jacobs
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*/
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#ifndef NODE_H_
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#define NODE_H_
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#include "em_arith.h"
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#include "em_label.h"
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/* N O D E O F A N A B S T R A C T P A R S E T R E E */
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struct node {
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char nd_class; /* kind of node */
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#define Value 0 /* constant */
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#define Arrsel 1 /* array selection */
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#define Oper 2 /* binary operator */
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#define Uoper 3 /* unary operator */
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#define Arrow 4 /* ^ construction */
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#define Call 5 /* cast or procedure - or function call */
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#define Name 6 /* an identifier */
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#define Set 7 /* a set constant */
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#define Xset 8 /* a set */
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#define Def 9 /* an identified name */
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#define Stat 10 /* a statement */
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#define Select 11 /* a '.' selection */
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#define Link 12
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/* do NOT change the order or the numbers!!! */
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char nd_flags; /* options */
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#define ROPTION 1
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#define AOPTION 2
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struct type *nd_type; /* type of this node */
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struct token nd_token;
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#define nd_set nd_token.tk_data.tk_set
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#define nd_def nd_token.tk_data.tk_def
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#define nd_LEFT nd_token.tk_data.tk_left
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#define nd_RIGHT nd_token.tk_data.tk_right
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#define nd_NEXT nd_token.tk_data.tk_next
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#define nd_symb nd_token.tk_symb
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#define nd_lineno nd_token.tk_lineno
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#define nd_IDF nd_token.TOK_IDF
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#define nd_SSTR nd_token.TOK_SSTR
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#define nd_STR nd_token.TOK_STR
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#define nd_SLE nd_token.TOK_SLE
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#define nd_INT nd_token.TOK_INT
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#define nd_REAL nd_token.TOK_REAL
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#define nd_RSTR nd_token.TOK_RSTR
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#define nd_RVAL nd_token.TOK_RVAL
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};
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#define new_node() ((struct node*) calloc(1, sizeof(struct node)))
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#define free_node(p) free(p)
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extern struct node *dot2node(), *dot2leaf(), *getnode();
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#define NULLNODE ((struct node *) 0)
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#define HASSELECTORS 002
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#define VARIABLE 004
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#define VALUE 010
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#define IsCast(lnd) ((lnd)->nd_class == Def && is_type((lnd)->nd_def))
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#define IsProc(lnd) ((lnd)->nd_type->tp_fund == T_PROCEDURE)
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struct node *getnode(int class);
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struct node *dot2node(int class, struct node *left, struct node *right);
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struct node *dot2leaf(int class);
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void FreeNode(register struct node *nd);
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int NodeCrash(register struct node* expp, label exit_label, int end_reached);
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int PNodeCrash(struct node **expp, int flags);
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#endif /* NODE_H_ */
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