1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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2 | * Copyright (C) 2001 Gerwin Klein <[email protected]> *
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3 | * Copyright (C) 2001 Bernhard Rumpe <[email protected]> *
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4 | * All rights reserved. *
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5 | * *
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6 | * This program is free software; you can redistribute it and/or modify *
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7 | * it under the terms of the GNU General Public License. See the file *
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8 | * COPYRIGHT for more information. *
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9 | * *
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10 | * This program is distributed in the hope that it will be useful, *
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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13 | * GNU General Public License for more details. *
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14 | * *
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15 | * You should have received a copy of the GNU General Public License along *
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16 | * with this program; if not, write to the Free Software Foundation, Inc., *
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17 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
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18 | * *
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19 | * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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20 |
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21 |
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22 | /**
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23 | * AST node for function application.
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24 | *
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25 | * Also contains pointer to declaration location of the function.
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26 | */
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27 | class Tfun extends Texp implements AST {
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28 | Tident ident; // name of the function
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29 | Texplist explist; // parameter list
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30 |
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31 | public Tfun(Tident i, Texplist e) {
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32 | ident=i;
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33 | explist=e;
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34 | }
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35 |
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36 | public String toString() {
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37 | return ident+"("+explist+")";
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38 | }
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39 |
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40 | public void checkcontext(SymTab st) { // CoCo (DefFun,Arity)
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41 | explist.checkcontext(st);
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42 | SymtabEntry ste = st.lookup(ident.toString());
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43 | if (ste==null)
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44 | Main.error("function not defined: "+ident);
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45 | else if (ste.kind() != SymtabEntry.FUN)
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46 | Main.error("variable used as funktion: "+ident);
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47 | else if (((STEfun)ste).arity() != explist.length())
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48 | Main.error("wrong arity at function call: "+ident);
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49 | }
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50 |
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51 | Tdekl fundekl; // pointer to location of function declaration
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52 |
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53 | // set pointers and indices
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54 | public void prepInterp(SymTab st) {
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55 | fundekl = ((STEfun)st.lookup(ident.toString())).getDekl();
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56 | explist.prepInterp(st);
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57 | }
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58 |
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59 | public int interpret(int[] in, int[] par) {
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60 | int[] newparams = new int[fundekl.arity()];
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61 | explist.interpret(in,par,newparams,0);
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62 | return fundekl.interpret(in,newparams);
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63 | }
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64 | }
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65 |
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66 |
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